Product Description

LAMAT PIPING – Ductile Iron Grooved Fittings
Name	Rigid coupling, Flexible coupling, 90° Elbow, 45° Elbow, 22.5° Elbow, 11.25° Elbow, Split Flange, Adaptor Flange, Cap
	Tee, Reducing Tee(Grooved/Threaded), Mechnical Tee(Grooved/Threaded), U-bolted Mechnical Tee
	Cross, Reducing Cross(Grooved/Threaded), Mechnical Cross(Grooved/Threaded)
	Reducer(Grooved/Threaded), Grooved Eccentric Reducer
H.S. CODE	735710000
Technology	Casting
Connections	Grooved-Thread End, Grooved End
Pressure Rate	300PSI / 2.07MPa
Size	1” – 12”
Pipe O.D.	33.7MM – 323.9MM
Surface Finish	Epoxy Powder,Painting,Galvanization,Dacromet (in Red/Orange/Blue/White Color)
Design Standard	American Standard	ANSI/ASTM
	European Standard	EN
	British Standard	BS
	Germany Standard	DIN
	Japanese Standard	JIS
	ISO Standard	ISO
Thread Standard	ASME B.1.20.1 / EN15716 / DIN2999 / ISO7-1 / ISO228 / IS554 / BS EN15716 / BS 21.173
Material Standard	Ductile Iron confirms to ASTM A-536 Gr65-45-12,EN1563,JIS G5502,QT450-12
Gasket Material	EPDM,NBR or Silicon Rubber
Bolts & Nuts	ISO 898-1class 8.8
Flanges Standard	PN series or Class series
Packages	Plywood Cases or Plywood Pallets or Boxes
Application	Fire Fighting System,Petrochemical & Gas Industry,Chemical,Machinery,Electric Power,Construction Water Works,Valve Industry,etc.
Advantages	High Quality + Ready Stock + Faster Delivery + Customized
Brand	LMP
Certificate	ISO9001,API,CE,UL/FM

 

Products Details

 

Factory & Workshop Show

 

Company Profile

WHO WE ARE

Lamat Piping established in 2002s,is 1 of China’s leading piping manufacturing and exporting suppliers,specialized in qualified steel flanges, butt weld pipe fittings and malleable cast iron fittings for clients from over 60 countries and regions worldwide.

Lamat Piping is the single and independent exporting department of NPCC(National Piping Construction Cooperation),who is a group company with 5 factories located in ZheJiang and ZheJiang , where the regions have very long histories in manufacturing Steel & Iron products dating back to 1990s. CZPT Piping(NPCC) aims to combine and intergrade some leading and high quality industries to become a modern and international piping supplier in the new century. Now we have more than 30 producing and machining lines with over 1000 normal workers and 80 technical employees. Our factories covers over 300,000 square meters,and has an annual output of 500,000Tons.

WHAT WE PRODUCE

Lamat Piping(NPCC) is producing flanges from 1/2” to 144” – Standards including ASTM B16.5, EN1092-1, BS4504, BS10, SANS1123, DIN, JIS, UNI, GOST, KS, AS, etc. Products including Plate Flanges FF/RF, Slip On Flanges FF/RF, Blind Flanges FF/RF, Welding Neck Flanges, Screwed Flange, Socketed Flanges, Lap Joint Flanges,Backing Rings Flanges,etc. Pressures includes 150LBS to 2500LBS in ASTM B16.5,PN6(T6/3/4/8) to PN100(T100/3/4/8) in EN1092-1/BS4504/BS10, T600/3/4/8 to T4000/3/4/8 in SANS1123.

Lamat Piping(NPCC) is producing butt weld fittings from 1/2” to 144” – Standards including ASTM B16.9, JIS B2311, EN15713, DIN, GOST…etc. Products including 45/90/180 Degree Short/Long Radius Elbow,Equal/Reducing Tee,Cross,Concentric/Eccentric Reducer,End Cap.

Lamat Piping(NPCC) is also producing malleable cast iron fittings from 1/2” to 6” – Standards ASME B16.3, ASME B16.14,BS EN15712,BS1256,DIN2950, BNR6943, ISO49,etc. Products including Elbow,Bend,Tee,Socket,Nipple,Bushing,Union,Cap,Plug,Back Nut.

WHAT WE SOURCE

With 30+ years constant efforts and experience,now CZPT Piping(NPCC) has become our customers’ expert manufacturer and supplier for a very wide range of piping products.And today CZPT Piping is not only supplying Flanges,BW fittings & Malleable Iron Fittings produced by ourselves,but also sourcing and exporting various Pipe Fittings & Valves s from China’s leading industries,including Cast Iron Valves, Ductile Iron Pipe Fitting, Stainless Steel 1,2,3PC Ball Valve, Stainless Steel 150LBS NPT/BSP Fittings, Wrought Steel Fittings,Grooved Fittings,Forged Steel Fittings,HDPE Pipes Fittings Valves,PVC Pipes Fittings Valves, Brass Valves Fittings,etc.

WHAT WE PROMISE

”BETTER QUALITY, BETTER SERVICES” is our promise to all of our customers and ”CREATE VALUE FOR CUSTOMERS” is our ultimate goal. CZPT Piping promises that we’ll continue to put quality in the first place;besides,we will not lose our fixed-focus on the service aspect of our business,which has been,and will continue to be the foundation of our success and our future growth.

WHAT YOU CHOOSE

If you’d like to trust CZPT Piping,Lamat people will do the best to be worthy of your trust!

 

Producing Process & Inspection

 

Pipeline System Application

 

Packaging & Shipping

FAQ

Q0: Are you a factory or trading company?

A: We are a factory mainly producing pipe fittings & flanges. We also have cooperated factories to supply other piping products.

Q1: How do your Control the Quality?

A: We have QA & QC department who will follow up all the producing process to make sure we’re supplying correctly.

Q2: What Machines are you using for Manufacturing and Machining?

A: We have Forging/Stamping Machine,CNC Machine,Hole-Drilling Machine,Sandblasting Machine. All producing is in our factory except Galvanization.

Q3: Can we get Samples for Testing?

A: Yes,sapmles are supplied free of charge.

Q4: Can you accept OEM & marking our LOGO?

A: Yes,no problem if you can provide Authorization.

Q5: Can you offer Drawings & Datasheets?

A: Yes,Drawings & Datasheets will be sent for your confirmation before Bulk Production.

Q6: Can you supply MTC with EN15714 3.1/3.2 Certificate?

A: Yes,MTC will be provided after production is finished.

Q7: Can we visit your factory to inspect the goods before delivery?

A: Yes sure. Welcome to our factory,and we also accept Third Party Inspection like SGS,TUV,BV,etc.

Q8: Can you combine goods from our other suppliers to ship together?

A: Yes,we’d like to assist you to ship together to save your time and money.

Q9: How long is your Delivery Time?

A: It depends on quantity and products. It can be delivered in 1 week if we have Ready-Stock; if not,the General Production Time is 25 – 50 Days.

Q10: What’s your Payment Terms?

A: Currently we’re working with our clients under T/T,L/C,O/A,Western Union,etc.

Lead Screws and Clamp Style Collars

If you have a lead screw, you’re probably interested in learning about the Acme thread on this type of shaft. You might also be interested in finding out about the Clamp style collars and Ball screw nut. But before you buy a new screw, make sure you understand what the terminology means. Here are some examples of screw shafts:

Acme thread

The standard ACME thread on a screw shaft is made of a metal that is resistant to corrosion and wear. It is used in a variety of applications. An Acme thread is available in a variety of sizes and styles. General purpose Acme threads are not designed to handle external radial loads and are supported by a shaft bearing and linear guide. Their design is intended to minimize the risk of flank wedging, which can cause friction forces and wear. The Centralizing Acme thread standard caters to applications without radial support and allows the thread to come into contact before its flanks are exposed to radial loads.
The ACME thread was first developed in 1894 for machine tools. While the acme lead screw is still the most popular screw in the US, European machines use the Trapezoidal Thread (Metric Acme). The acme thread is a stronger and more resilient alternative to square threads. It is also easier to cut than square threads and can be cut by using a single-point threading die.
Similarly to the internal threads, the metric versions of Acme are similar to their American counterparts. The only difference is that the metric threads are generally wider and are used more frequently in industrial settings. However, the metric-based screw threads are more common than their American counterparts worldwide. In addition, the Acme thread on screw shafts is used most often on external gears. But there is still a small minority of screw shafts that are made with a metric thread.
ACME screws provide a variety of advantages to users, including self-lubrication and reduced wear and tear. They are also ideal for vertical applications, where a reduced frictional force is required. In addition, ACME screws are highly resistant to back-drive and minimize the risk of backlash. Furthermore, they can be easily checked with readily available thread gauges. So, if you’re looking for a quality ACME screw for your next industrial project, look no further than ACME.

Lead screw coatings

The properties of lead screw materials affect their efficiency. These materials have high anti-corrosion, thermal resistance, and self-lubrication properties, which eliminates the need for lubrication. These coating materials include polytetrafluoroethylene (PFE), polyether ether ketone (PEK), and Vespel. Other desirable properties include high tensile strength, corrosion resistance, and rigidity.
The most common materials for lead screws are carbon steel, stainless steel, and aluminum. Lead screw coatings can be PTFE-based to withstand harsh environments and remove oil and grease. In addition to preventing corrosion, lead screw coatings improve the life of polymer parts. Lead screw assembly manufacturers offer a variety of customization options for their lead screw, including custom-molded nuts, thread forms, and nut bodies.
Lead screws are typically measured in rpm, or revolutions per minute. The PV curve represents the inverse relationship between contact surface pressure and sliding velocity. This value is affected by the material used in the construction of the screw, lubrication conditions, and end fixity. The critical speed of lead screws is determined by their length and minor diameter. End fixity refers to the support for the screw and affects its rigidity and critical speed.
The primary purpose of lead screws is to enable smooth movement. To achieve this, lead screws are usually preloaded with axial load, enabling consistent contact between a screw’s filets and nuts. Lead screws are often used in linear motion control systems and feature a large area of sliding contact between male and female threads. Lead screws can be manually operated or mortised and are available in a variety of sizes and materials. The materials used for lead screws include stainless steel and bronze, which are often protected by a PTFE type coating.
These screws are made of various materials, including stainless steel, bronze, and various plastics. They are also made to meet specific requirements for environmental conditions. In addition to lead screws, they can be made of stainless steel, aluminum, and carbon steel. Surface coatings can improve the screw’s corrosion resistance, while making it more wear resistant in tough environments. A screw that is coated with PTFE will maintain its anti-corrosion properties even in tough environments.

Clamp style collars

The screw shaft clamp style collar is a basic machine component, which is attached to the shaft via multiple screws. These collars act as mechanical stops, load bearing faces, or load transfer points. Their simple design makes them easy to install. This article will discuss the pros and cons of this style of collar. Let’s look at what you need to know before choosing a screw shaft clamp style collar. Here are some things to keep in mind.
Clamp-style shaft collars are a versatile mounting option for shafts. They have a recessed screw that fully engages the thread for secure locking. Screw shaft clamp collars come in different styles and can be used in both drive and power transmission applications. Listed below are the main differences between these 2 styles of collars. They are compatible with all types of shafts and are able to handle axial loads of up to 5500 pounds.
Clamp-style shaft collars are designed to prevent the screw from accidentally damaging the shaft when tightened. They can be tightened with a set screw to counteract the initial clamping force and prevent the shaft from coming loose. However, when tightening the screw, you should use a torque wrench. Using a set screw to tighten a screw shaft collar can cause it to warp and reduce the surface area that contacts the shaft.
Another key advantage to Clamp-style shaft collars is that they are easy to install. Clamp-style collars are available in one-piece and two-piece designs. These collars lock around the shaft and are easy to remove and install. They are ideal for virtually any shaft and can be installed without removing any components. This type of collar is also recommended for those who work on machines with sensitive components. However, be aware that the higher the OD, the more difficult it is to install and remove the collar.
Screw shaft clamp style collars are usually one-piece. A two-piece collar is easier to install than a one-piece one. The two-piece collars provide a more effective clamping force, as they use the full seating torque. Two-piece collars have the added benefit of being easy to install because they require no tools to install. You can disassemble one-piece collars before installing a two-piece collar.

Ball screw nut

The proper installation of a ball screw nut requires that the nut be installed on the center of the screw shaft. The return tubes of the ball nut must be oriented upward so that the ball nut will not overtravel. The adjusting nut must be tightened against a spacer or spring washer, then the nut is placed on the screw shaft. The nut should be rotated several times in both directions to ensure that it is centered.
Ball screw nuts are typically manufactured with a wide range of preloads. Large preloads are used to increase the rigidity of a ball screw assembly and prevent backlash, the lost motion caused by a clearance between the ball and nut. Using a large amount of preload can lead to excessive heat generation. The most common preload for ball screw nuts is 1 to 3%. This is usually more than enough to prevent backlash, but a higher preload will increase torque requirements.
The diameter of a ball screw is measured from its center, called the ball circle diameter. This diameter represents the distance a ball will travel during 1 rotation of the screw shaft. A smaller diameter means that there are fewer balls to carry the load. Larger leads mean longer travels per revolution and higher speeds. However, this type of screw cannot carry a greater load capacity. Increasing the length of the ball nut is not practical, due to manufacturing constraints.
The most important component of a ball screw is a ball bearing. This prevents excessive friction between the ball and the nut, which is common in lead-screw and nut combinations. Some ball screws feature preloaded balls, which avoid “wiggle” between the nut and the ball. This is particularly desirable in applications with rapidly changing loads. When this is not possible, the ball screw will experience significant backlash.
A ball screw nut can be either single or multiple circuits. Single or multiple-circuit ball nuts can be configured with 1 or 2 independent closed paths. Multi-circuit ball nuts have 2 or more circuits, making them more suitable for heavier loads. Depending on the application, a ball screw nut can be used for small clearance assemblies and compact sizes. In some cases, end caps and deflectors may be used to feed the balls back to their original position.

Product Description

UL/FM/CE Pipe Fittings Grooved Rigid Flexible Coupling

Specification of Rigid Coupling
 

Nominal Size mm/in	Pipe O.;D mm/in	Working Pressure PSI/MPa	Bolt Size	Dimensions mm/in
			No.;-Size mm	Ø	L	H
25              1	33.;7        1.;327	300       2.;07	2-M10*45	55.;         2.;165	95             3.;74	45    1.;772
32            1¼	42.;4        1.;669	300       2.;07	2-M10*45	65          2.;559	105          4.;133	45    1.;772
40            1½	48.;3        1.;900	300       2.;07	2-M10*45	71.;         2.;795	110          4.;331	45   1.;772
50              2	60.;3        2.;375	300       2.;07	2-M10*55	82          3.;228	124          4.;882	45   1.;772
65            2½	73.;0        2.;875	300       2.;07	2-M10*55	98          3.;858	141          5.;551	45   1.;772
65          3OD	76.;1        3.;000	300       2.;07	2-M10*55	100        3.;937	142          5.;59	45   1.;772
80              3	88.;9        3.;500	300       2.;07	2-M10*55	113        4.;449	160          6.;299	46   1.;811
100            4	114.;3      4.;500	300       2.;07	2-M10*55	142        5.;59	190          7.;48	49   1.;929
125        5.;5OD	139.;7      5.;500	300       2.;07	2-M10*55	168        6.;614	218          8.;583	49   1.;929
150        6.;50D	165.;1      6.;500	300       2.;07	2-M10*55	194        7.;638	244          9.;606	49    1.;929
150            6	168.;3      6.;625	300       2.;07	2-M10*55	198        7.;795	248          9.;764	49    1.;929
200            8	219.;1      8.;625	300       2.;07	2-M10*55	256       10.;079	320         12.;598	60     2.;362
250          10	273         10.;748	300       2.;07	2-M10*55	328       12.;913	420         16.;535	64     2.;52
300          12	323.;9      12.;752	300       2.;07	2-M10*55	380       14.;961	454          7.;874	64     2.;52

Instanllation Instruction for Riquid & Flexible Coupling

1.; Pipe preparation Check pipe end for proper grove demensions and assure that pipe end is free of indentations and projections that would prevent proper sealing.;
2.; Lubricate gasket Check gasket to be sure it’s compatible for the intended service.; Apply thin lubricant to the outside and seal lips of the gasket.;
3.; Gasket installation Slip the gasket over 1 pipe,; making sure the gasket lip does not overhang the pipe end.;
4.; Alignment After aligning 2 pipe ends toghther,; pull the gasket into position,; centering between the grooves on each pipe.; The gasket should not extend into the groove on either pipe.;
5.; Housing installation Remove 1 bolt&nut and loosen the other nut.; Place 1 housing over the gasket,; making sure the housing fit into the pipe grrooves.; Swing the other housing over the gasket and into the grooves on both pipes.; Reinsert the bolt and connect 2 housing.;
6.; Tighten nuts Firstly tighten nuts by hand and make sure oval neck bolt completely fits into bolt hole.; Then securely tighten nuts alternatively and equally to specified bolt torque by using spanner.;
7.; Installation complete-rigid coupling For rigid coupling,; keep the gaps between bolt pads evenly spaced.; Gaskets cannot be visual.;
8.; Installation complete-flexible coupling For flexible coupling,; 2 housing should be connected iron to iron.; Gaskets cannot be visual.;
Caution:;
Proper torquing of bolts is required to obtain specified performance.; Over torquing the bolts may result in damage to the bolt and/or casting which could result in pipe joint separation.; Under troquing the bolts may result in lower pressure retention capabilities,; lower bend load capabilities,; joint leakage and pipe joint separation.; Pipe joint separation may result in significant property damange and serious injury.;

Range of products

Rigid coupling,; Flexible coupling,; 90° Elbow,; 45° Elbow,; 22.;5° Elbow,; 11.;25° Elbow,; Tee,; Reducing Tee(Grooved/Threaded);,; Cross,; Reducing Cross(Grooved/Threaded);,; Mechnical Tee(Grooved/Threaded);,; Mechnical Cross(Grooved/Threaded);,; U-bolted Mechnical Tee,; Reducer(Grooved/Threaded);,; Grooved Eccentric Reducer,; Grooved Split Flange,; Grooved Adaptor Flange,; Cap.;

Detailed information
Certificate :; UL listed & FM approved
Standard grooved specifications :; according to GRUVLOCK
Material :; Ductile Iron conforming to ASTM A536,; Grade 65–45–12
Thread :; BSPT & BSP & NPT
Standard Coat :; Epoxy-RAL3000
Optional :; 1.; painted 2.;dacromat 3.;galvanized
Color :; Red,; Blue,; Orange,; White
Gasket :; EPDM / NBR / Silicon Rubber
Bolts and Nuts :; ISO 898-1class 8.;8
Payment term :;  T/T,; LC at sight
Package :; Cartons with pallet/ Wooden case
Delivery time:; 25-40 Days

Gasket
 

Gasket	Material	Temperature Range	Recommendations		Color
E	EPDM	-34ºC~+110ºC (-30~+230ºC);	Recommend for hot water,; dilute acid,; oil-free gas and other mecmicals(except for hybrocarbon); within the specified temperature range.; Not recommend for petroleum and hydrocarbon.;		Green Strip
D	NBR	-29ºC~+82ºC (-20~+180ºC);	Recommended for petroleum products,; gas with oil vapors,; mineral oil and vegetable oil.; Not recommended for high temperature materials.;		Orange Strip
S	Silicon Rubber	-40ºC~+177ºC (-40~+350ºC);	Recommended for high temperature and dry air,; and some high temperature chemicals.;		White

Why choose 1nuo?

HangZhou CZPT has strong technical strength and possesses the world’s first-class equipment and technology,; as well as perfect testing methods.; All rough castings of grooved fittings will be processed and produced by electric-furnace smelting,; on-line monitoring and control and automatic molding methods.; Now our facilities include eleven medium frequency furnace,; 4 advanced vertical parting molding lines and 3 painting lines.; Every customer’s requirements can be satisfied by customized services.;

Yinuo’s ductile iron grooved fittings have successively passed the China national type test,; ISO 9001 and FM&UL approvals etc.; Our products are underwritten by China Ping An Insurance(Group); Co.;,;Ltd.; The grooved pipe fittings are widely used in fire fighting,; air-conditioning,; water supply,; sewage,; cement,; low-pressure steaming,; mine piping and ordinary piping delivery.; 

ø Corporate Vision:; Where there is pipes,; there is 1nuo.;
ø Corporate Mission:; Connecting pipeline around the world,; benefiting homes in every building.;
ø Competitive Strategy:; To supply market with perfect products,; to win customers with excellent service.;
ø Core Value:; Pragmatic honesty,; quality first,; continuous innovation and CZPT cooperation.;
ø Quality Value:; We survive with quality and develop by technology.;
 

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

Product Description

Ductile Cast Iron Grooved Fitting Flexible Rigid Coupling 300Psi 2.07Mpa

Type: Rigid coupling, Flexible coupling
 Material: Ductile Iron ASTM A536 Gr.65-45-12
 Tecnique: Casting
 Size:  1″-12″, special size and design as per your drawing
 Pressure: 300PSI/2.07Mpa
 Surface Treatment: Dacromet, Galvanized, Paiting (Red(RAL3000), Orange, Blue)
 Certificate: FM, UL, ISO
 Packaging Details: 
1) Carton boxes, plywood pallet(1CBM)with plastic film,30boxes per pallet at most. 
2) Plywood cases(1CBM). Or as customer’s requirement.
 Application: 
1)    Automatic sprinkler system for fire protection on commercial, civil and municipal constructions like water supplying, gas supplying, heat supplying, etc.
2)    Industrial pipeline system on shipping, mine, oil field, textile, powder plant, etc.
3)    Pipeline system on subway station, railway station, airport, seaport, bridge, etc.
 

Product:	FM UL Ductile Casting Iron Grooved Pipe Fittings
Series:	Rigid coupling, Flexible coupling, Elbow, Tee, Cross, Mechanical Tee, Reducer, Adaptor Flange, Convoluted Flange, Split Flange
Standard:	Ductile Iron: conform to ASTM A536 Gr.65-45-12 Groove Standard: AWWA C606-Groove and Shouldered Joints  Thread Standard: NPT, BSPT, BSP/RC Bolts and Nuts: ASTM A449
Techonology:	Casting
Size:	1″-12″, special size and design according to customer’s drawing
Pressure:	300PSI/2.07Mpa
Treatment:	Dacromet, Galvanized, Paiting(Red(RAL3000), Orange, Blue)
Certificates:	FM & UL
Packaging Details	1) Carton boxes, plywood pallet(1CBM)with plastic film,30boxes per pallet at most.  2) Plywood cases(1CBM). Or as customer’s requirement. 3)Plastic bag with single item(This is not our ordinary packing, but can do as customer’s requirement
Application:	Fire protection

 

The Four Basic Components of a Screw Shaft

There are 4 basic components of a screw shaft: the Head, the Thread angle, and the Threaded shank. These components determine the length, shape, and quality of a screw. Understanding how these components work together can make purchasing screws easier. This article will cover these important factors and more. Once you know these, you can select the right type of screw for your project. If you need help choosing the correct type of screw, contact a qualified screw dealer.

Thread angle

The angle of a thread on a screw shaft is the difference between the 2 sides of the thread. Threads that are unified have a 60 degree angle. Screws have 2 parts: a major diameter, also known as the screw’s outside diameter, and a minor diameter, or the screw’s root diameter. A screw or nut has a major diameter and a minor diameter. Each has its own angle, but they all have 1 thing in common – the angle of thread is measured perpendicularly to the screw’s axis.
The pitch of a screw depends on the helix angle of the thread. In a single-start screw, the lead is equal to the pitch, and the thread angle of a multiple-start screw is based on the number of starts. Alternatively, you can use a square-threaded screw. Its square thread minimizes the contact surface between the nut and the screw, which improves efficiency and performance. A square thread requires fewer motors to transfer the same load, making it a good choice for heavy-duty applications.
A screw thread has 4 components. First, there is the pitch. This is the distance between the top and bottom surface of a nut. This is the distance the thread travels in a full revolution of the screw. Next, there is the pitch surface, which is the imaginary cylinder formed by the average of the crest and root height of each tooth. Next, there is the pitch angle, which is the angle between the pitch surface and the gear axis.

Head

There are 3 types of head for screws: flat, round, and hexagonal. They are used in industrial applications and have a flat outer face and a conical interior. Some varieties have a tamper-resistant pin in the head. These are usually used in the fabrication of bicycle parts. Some are lightweight, and can be easily carried from 1 place to another. This article will explain what each type of head is used for, and how to choose the right 1 for your screw.
The major diameter is the largest diameter of the thread. This is the distance between the crest and the root of the thread. The minor diameter is the smaller diameter and is the distance between the major and minor diameters. The minor diameter is half the major diameter. The major diameter is the upper surface of the thread. The minor diameter corresponds to the lower extreme of the thread. The thread angle is proportional to the distance between the major and minor diameters.
Lead screws are a more affordable option. They are easier to manufacture and less expensive than ball screws. They are also more efficient in vertical applications and low-speed operations. Some types of lead screws are also self-locking, and have a high coefficient of friction. Lead screws also have fewer parts. These types of screw shafts are available in various sizes and shapes. If you’re wondering which type of head of screw shaft to buy, this article is for you.

Threaded shank

Wood screws are made up of 2 parts: the head and the shank. The shank is not threaded all the way up. It is only partially threaded and contains the drive. This makes them less likely to overheat. Heads on wood screws include Oval, Round, Hex, Modified Truss, and Flat. Some of these are considered the “top” of the screw.
Screws come in many sizes and thread pitches. An M8 screw has a 1.25-mm thread pitch. The pitch indicates the distance between 2 identical threads. A pitch of 1 is greater than the other. The other is smaller and coarse. In most cases, the pitch of a screw is indicated by the letter M followed by the diameter in millimetres. Unless otherwise stated, the pitch of a screw is greater than its diameter.
Generally, the shank diameter is smaller than the head diameter. A nut with a drilled shank is commonly used. Moreover, a cotter pin nut is similar to a castle nut. Internal threads are usually created using a special tap for very hard metals. This tap must be followed by a regular tap. Slotted machine screws are usually sold packaged with nuts. Lastly, studs are often used in automotive and machine applications.
In general, screws with a metric thread are more difficult to install and remove. Fortunately, there are many different types of screw threads, which make replacing screws a breeze. In addition to these different sizes, many of these screws have safety wire holes to keep them from falling. These are just some of the differences between threaded screw and non-threaded. There are many different types of screw threads, and choosing the right 1 will depend on your needs and your budget.

Point

There are 3 types of screw heads with points: cone, oval, and half-dog. Each point is designed for a particular application, which determines its shape and tip. For screw applications, cone, oval, and half-dog points are common. Full dog points are not common, and they are available in a limited number of sizes and lengths. According to ASTM standards, point penetration contributes as much as 15% of the total holding power of the screw, but a cone-shaped point may be more preferred in some circumstances.
There are several types of set screws, each with its own advantage. Flat-head screws reduce indentation and frequent adjustment. Dog-point screws help maintain a secure grip by securing the collar to the screw shaft. Cup-point set screws, on the other hand, provide a slip-resistant connection. The diameter of a cup-point screw is usually half of its shaft diameter. If the screw is too small, it may slack and cause the screw collar to slip.
The UNF series has a larger area for tensile stress than coarse threads and is less prone to stripping. It’s used for external threads, limited engagement, and thinner walls. When using a UNF, always use a standard tap before a specialized tap. For example, a screw with a UNF point is the same size as a type C screw but with a shorter length.

Spacer

A spacer is an insulating material that sits between 2 parts and centers the shaft of a screw or other fastener. Spacers come in different sizes and shapes. Some of them are made of Teflon, which is thin and has a low coefficient of friction. Other materials used for spacers include steel, which is durable and works well in many applications. Plastic spacers are available in various thicknesses, ranging from 4.6 to 8 mm. They’re suitable for mounting gears and other items that require less contact surface.
These devices are used for precision fastening applications and are essential fastener accessories. They create clearance gaps between the 2 joined surfaces or components and enable the screw or bolt to be torqued correctly. Here’s a quick guide to help you choose the right spacer for the job. There are many different spacers available, and you should never be without one. All you need is a little research and common sense. And once you’re satisfied with your purchase, you can make a more informed decision.
A spacer is a component that allows the components to be spaced appropriately along a screw shaft. This tool is used to keep space between 2 objects, such as the spinning wheel and an adjacent metal structure. It also helps ensure that a competition game piece doesn’t rub against an adjacent metal structure. In addition to its common use, spacers can be used in many different situations. The next time you need a spacer, remember to check that the hole in your screw is threaded.

Nut

A nut is a simple device used to secure a screw shaft. The nut is fixed on each end of the screw shaft and rotates along its length. The nut is rotated by a motor, usually a stepper motor, which uses beam coupling to accommodate misalignments in the high-speed movement of the screw. Nuts are used to secure screw shafts to machined parts, and also to mount bearings on adapter sleeves and withdrawal sleeves.
There are several types of nut for screw shafts. Some have radial anti-backlash properties, which prevent unwanted radial clearances. In addition, they are designed to compensate for thread wear. Several nut styles are available, including anti-backlash radial nuts, which have a spring that pushes down on the nut’s flexible fingers. Axial anti-backlash nuts also provide thread-locking properties.
To install a ball nut, you must first align the tangs of the ball and nut. Then, you must place the adjusting nut on the shaft and tighten it against the spacer and spring washer. Then, you need to lubricate the threads, the ball grooves, and the spring washers. Once you’ve installed the nut, you can now install the ball screw assembly.
A nut for screw shaft can be made with either a ball or a socket. These types differ from hex nuts in that they don’t need end support bearings, and are rigidly mounted at the ends. These screws can also have internal cooling mechanisms to improve rigidity. In this way, they are easier to tension than rotating screws. You can also buy hollow stationary screws for rotator nut assemblies. This type is great for applications requiring high heat and wide temperature changes, but you should be sure to follow the manufacturer’s instructions.