Tag Archives: micro motor

China OEM Hollow Double Shafts NEMA 8 Micro Stepper Motor (20SHD0250-10SK) with Hot selling

Product Description

         NEMA 8 Hollow Double Shafts Micro Stepper Motor (20SHD0001-12SK)

Product Information 

1) Raw Materials: Tested by Professional Precise Equipment.

2) 3 Inspection Lines

3) 1 Year Gurantee + Famous Chain Customers

 

Product Name
 		 Electric Stepper Motor
Dimensions
 		 Nema8(20mm), 11(28mm), 14(35mm), 16(39mm), 17(42mm), 23(57mm), 24(60mm), 34(86mm)
Step Angle
 		 Degree 0.9, 1.2, 1.8(Optional or Customized)
Torque
(oz.in)
 		 Up to 3.11, 5.7, 17,  41, 56, 85, 113, 425, 
Rated Current (A/Phase)
 		 0.1A~10A
Typical Applications
 		 Inject Printers, Analytical and Medical Instruments, Textile Equipment, Embroidery Machine, Precision Telescope Positioning Systems, High Speed Dome Camera and Robotics

Product Display

 Casun    HYBRID STEPPER MOTOR (20SHD0001-12SK) 

 

Motor Name: HYBRID STEPPER MOTOR

Size: NEMA 8 (20*20*30mm)

Feature: small volume, low noise, smooth running

The Outline Drawing of NEMA 8 Stepper Motor:
 

Casun    HYBRID STEPPER MOTOR 20SHD0001-12SK
General Specification Electrical Specification
Step Angle
 		 1.8° Rated Voltage 3.9V 
Number of Phase
 		 2 Rated Current 0.6A
Insulation Resistance
 		 100MΩmin. (500V DC) Resistance per phase 6.5Ω±10%
Insulation Class
 		 Class B Inductance per Phase 1.7mH±20%
Rotor Inertia
 		 2g.cm² Holding torque 18mN.m
Mass
 		 0.06kg Detent torque 2mN.m

More Specification
 

Modle Holding Torque Rated Current Resistance per phase Inductance per phase

Detent

Torque

 Rotor inertia

Lead

wire

 Motor Length
mN.m A Ω mH mN.m g.cm² No. mm
42SHD571 200 0.7 12 15 7.5 20 4 26
42SHD0001 260 0.4 30 37 12 38 4 34
42SHD0002 280 0.6 22 28 12 38 4
42SHD0009 200 0.4 30 21 12 38 6
42SHD571 200 1.2 2.1 1.2 12 38 6
42SHD5712 400 0.5 25 50 18 57 4 40
42SHD5716 400 1.0 4.5 10 18 57 4
42SHD5719 300 1.2 3.2 3.0 18 57 6
42SHD0404 450 1.5 2.0 2.8 37 72 4 48
42SHD0441 420 1.2 3.2 6 37 72 4
42SHD0801 600 1.5 2.0 3.2 42 102 4 60

 Above is our partial products parameter, for more products pls contact us. OEM &ODM are welcomed.

Notice

1.Motors production
  All the proucts we sold here are manufactured by HangZhou FUDE  Technology Co., Ltd.,China.

2.Motors selection
  Please contact us to confirm the model and other details of the motor before purchase.

3.Payment
  We can serve samples and accept fully prepayment only . 50% advance is needed for bulk purchase and balance  before shipment .Paypal, Western Union, T/T are all accepted.

4.Delivery
  Samples in stock can be delivered within 7 days and customized samples within 30 days. Delivery date for bulk order depends on quantity.

5.Feedback and after-sale service
  Any problems in using are welcome to be informed !Our technician will give you professional advise. We will give you free maintenance within 24 months if the flaws are the result of production.

What’s More

                             Welcome to customize all types of stepper motors                                            
                                         
                                             Please feel free to contact us !

Screw Shaft Features Explained

When choosing the screw shaft for your application, you should consider the features of the screws: threads, lead, pitch, helix angle, and more. You may be wondering what these features mean and how they affect the screw’s performance. This article explains the differences between these factors. The following are the features that affect the performance of screws and their properties. You can use these to make an informed decision and purchase the right screw. You can learn more about these features by reading the following articles.

Threads

The major diameter of a screw thread is the larger of the 2 extreme diameters. The major diameter of a screw is also known as the outside diameter. This dimension can’t be directly measured, but can be determined by measuring the distance between adjacent sides of the thread. In addition, the mean area of a screw thread is known as the pitch. The diameter of the thread and pitch line are directly proportional to the overall size of the screw.
The threads are classified by the diameter and pitch. The major diameter of a screw shaft has the largest number of threads; the smaller diameter is called the minor diameter. The thread angle, also known as the helix angle, is measured perpendicular to the axis of the screw. The major diameter is the largest part of the screw; the minor diameter is the lower end of the screw. The thread angle is the half distance between the major and minor diameters. The minor diameter is the outer surface of the screw, while the top surface corresponds to the major diameter.
The pitch is measured at the crest of a thread. In other words, a 16-pitch thread has a diameter of 1 sixteenth of the screw shaft’s diameter. The actual diameter is 0.03125 inches. Moreover, a large number of manufacturers use this measurement to determine the thread pitch. The pitch diameter is a critical factor in successful mating of male and female threads. So, when determining the pitch diameter, you need to check the thread pitch plate of a screw.
screwshaft

Lead

In screw shaft applications, a solid, corrosion-resistant material is an important requirement. Lead screws are a robust choice, which ensure shaft direction accuracy. This material is widely used in lathes and measuring instruments. They have black oxide coatings and are suited for environments where rusting is not acceptable. These screws are also relatively inexpensive. Here are some advantages of lead screws. They are highly durable, cost-effective, and offer high reliability.
A lead screw system may have multiple starts, or threads that run parallel to each other. The lead is the distance the nut travels along the shaft during a single revolution. The smaller the lead, the tighter the thread. The lead can also be expressed as the pitch, which is the distance between adjacent thread crests or troughs. A lead screw has a smaller pitch than a nut, and the smaller the lead, the greater its linear speed.
When choosing lead screws, the critical speed is the maximum number of revolutions per minute. This is determined by the minor diameter of the shaft and its length. The critical speed should never be exceeded or the lead will become distorted or cracked. The recommended operational speed is around 80 percent of the evaluated critical speed. Moreover, the lead screw must be properly aligned to avoid excessive vibrations. In addition, the screw pitch must be within the design tolerance of the shaft.

Pitch

The pitch of a screw shaft can be viewed as the distance between the crest of a thread and the surface where the threads meet. In mathematics, the pitch is equivalent to the length of 1 wavelength. The pitch of a screw shaft also relates to the diameter of the threads. In the following, the pitch of a screw is explained. It is important to note that the pitch of a screw is not a metric measurement. In the following, we will define the 2 terms and discuss how they relate to 1 another.
A screw’s pitch is not the same in all countries. The United Kingdom, Canada, and the United States have standardized screw threads according to the UN system. Therefore, there is a need to specify the pitch of a screw shaft when a screw is being manufactured. The standardization of pitch and diameter has also reduced the cost of screw manufacturing. Nevertheless, screw threads are still expensive. The United Kingdom, Canada, and the United States have introduced a system for the calculation of screw pitch.
The pitch of a lead screw is the same as that of a lead screw. The diameter is 0.25 inches and the circumference is 0.79 inches. When calculating the mechanical advantage of a screw, divide the diameter by its pitch. The larger the pitch, the more threads the screw has, increasing its critical speed and stiffness. The pitch of a screw shaft is also proportional to the number of starts in the shaft.

Helix angle

The helix angle of a screw shaft is the angle formed between the circumference of the cylinder and its helix. Both of these angles must be equal to 90 degrees. The larger the lead angle, the smaller the helix angle. Some reference materials refer to angle B as the helix angle. However, the actual angle is derived from calculating the screw geometry. Read on for more information. Listed below are some of the differences between helix angles and lead angles.
High helix screws have a long lead. This length reduces the number of effective turns of the screw. Because of this, fine pitch screws are usually used for small movements. A typical example is a 16-mm x 5-inch screw. Another example of a fine pitch screw is a 12x2mm screw. It is used for small moves. This type of screw has a lower lead angle than a high-helix screw.
A screw’s helix angle refers to the relative angle of the flight of the helix to the plane of the screw axis. While screw helix angles are not often altered from the standard square pitch, they can have an effect on processing. Changing the helix angle is more common in two-stage screws, special mixing screws, and metering screws. When a screw is designed for this function, it should be able to handle the materials it is made of.
screwshaft

Size

The diameter of a screw is its diameter, measured from the head to the shaft. Screw diameters are standardized by the American Society of Mechanical Engineers. The diameters of screws range from 3/50 inches to 16 inches, and more recently, fractions of an inch have been added. However, shaft diameters may vary depending on the job, so it is important to know the right size for the job. The size chart below shows the common sizes for screws.
Screws are generally referred to by their gauge, which is the major diameter. Screws with a major diameter less than a quarter of an inch are usually labeled as #0 to #14 and larger screws are labeled as sizes in fractions of an inch. There are also decimal equivalents of each screw size. These measurements will help you choose the correct size for your project. The screws with the smaller diameters were not tested.
In the previous section, we described the different shaft sizes and their specifications. These screw sizes are usually indicated by fractions of an inch, followed by a number of threads per inch. For example, a ten-inch screw has a shaft size of 2” with a thread pitch of 1/4″, and it has a diameter of 2 inches. This screw is welded to a two-inch Sch. 40 pipe. Alternatively, it can be welded to a 9-inch O.A.L. pipe.
screwshaft

Shape

Screws come in a wide variety of sizes and shapes, from the size of a quarter to the diameter of a U.S. quarter. Screws’ main function is to hold objects together and to translate torque into linear force. The shape of a screw shaft, if it is round, is the primary characteristic used to define its use. The following chart shows how the screw shaft differs from a quarter:
The shape of a screw shaft is determined by 2 features: its major diameter, or distance from the outer edge of the thread on 1 side to the inner smooth surface of the shaft. These are generally 2 to 16 millimeters in diameter. Screw shafts can have either a fully threaded shank or a half-threaded shank, with the latter providing better stability. Regardless of whether the screw shaft is round or domed, it is important to understand the different characteristics of a screw before attempting to install it into a project.
The screw shaft’s diameter is also important to its application. The ball circle diameter refers to the distance between the center of 2 opposite balls in contact with the grooves. The root diameter, on the other hand, refers to the distance between the bottommost grooves of the screw shaft. These are the 2 main measurements that define the screw’s overall size. Pitch and nominal diameter are important measurements for a screw’s performance in a particular application.

Lubrication

In most cases, lubrication of a screw shaft is accomplished with grease. Grease is made up of mineral or synthetic oil, thickening agent, and additives. The thickening agent can be a variety of different substances, including lithium, bentonite, aluminum, and barium complexes. A common classification for lubricating grease is NLGI Grade. While this may not be necessary when specifying the type of grease to use for a particular application, it is a useful qualitative measure.
When selecting a lubricant for a screw shaft, the operating temperature and the speed of the shaft determine the type of oil to use. Too much oil can result in heat buildup, while too little can lead to excessive wear and friction. The proper lubrication of a screw shaft directly affects the temperature rise of a ball screw, and the life of the assembly. To ensure the proper lubrication, follow the guidelines below.
Ideally, a low lubrication level is appropriate for medium-sized feed stuff factories. High lubrication level is appropriate for larger feed stuff factories. However, in low-speed applications, the lubrication level should be sufficiently high to ensure that the screws run freely. This is the only way to reduce friction and ensure the longest life possible. Lubrication of screw shafts is an important consideration for any screw.

China OEM Hollow Double Shafts NEMA 8 Micro Stepper Motor (20SHD0250-10SK) with Hot sellingChina OEM Hollow Double Shafts NEMA 8 Micro Stepper Motor (20SHD0250-10SK) with Hot selling

China OEM 1.8 Degree Double Screw Shaft NEMA 8 Micro Stepper Motor (20SHD0002-100T1) with Best Sales

Product Description

 1.8 Degree Double Screw Shaft NEMA 8 Micro Stepper Motor (20SHD0002-100T1)

Product Information 

1) Raw Materials: Tested by Professional Precise Equipment.

2) 3 Inspection Lines

3) 1 Year Gurantee + Famous Chain Customers

 

Product Name
 		 Electric Stepper Motor
Dimensions
 		 Nema8(20mm), 11(28mm), 14(35mm), 16(39mm), 17(42mm), 23(57mm), 24(60mm), 34(86mm)
Step Angle
 		 Degree 0.9, 1.2, 1.8(Optional or Customized)
Torque
(oz.in)
 		 Up to 3.11, 5.7, 17,  41, 56, 85, 113, 425, 
Rated Current (A/Phase)
 		 0.1A~10A
Typical Applications
 		 Inject Printers, Analytical and Medical Instruments, Textile Equipment, Embroidery Machine, Precision Telescope Positioning Systems, High Speed Dome Camera and Robotics

Product Display

 Casun    HYBRID STEPPER MOTOR (20SHD0002-100T1) 

 

Motor Name: HYBRID STEPPER MOTOR

Size: NEMA 8 (20*20*30mm)

Feature: small volume, low noise, smooth running

The Outline Drawing of NEMA 8 Stepper Motor:
 

Casun    HYBRID STEPPER MOTOR 20SHD0002-100T1
General Specification Electrical Specification
Step Angle
 		 1.8° Rated Voltage 3.72V 
Number of Phase
 		 2 Rated Current 0.3A
Insulation Resistance
 		 100MΩmin. (500V DC) Resistance per phase 12.4Ω±10%
Insulation Class
 		 Class B Inductance per Phase 3.6mH±20%
Rotor Inertia
 		 2g.cm² Holding torque 12mN.m
Mass
 		 0.06kg Detent torque 2mN.m

More Specification
 

Modle Holding Torque Rated Current Resistance per phase Inductance per phase

Detent

Torque

 Rotor inertia

Lead

wire

 Motor Length
mN.m A Ω mH mN.m g.cm² No. mm
42SHD571 200 0.7 12 15 7.5 20 4 26
42SHD0001 260 0.4 30 37 12 38 4 34
42SHD0002 280 0.6 22 28 12 38 4
42SHD0009 200 0.4 30 21 12 38 6
42SHD571 200 1.2 2.1 1.2 12 38 6
42SHD5712 400 0.5 25 50 18 57 4 40
42SHD5716 400 1.0 4.5 10 18 57 4
42SHD5719 300 1.2 3.2 3.0 18 57 6
42SHD0404 450 1.5 2.0 2.8 37 72 4 48
42SHD0441 420 1.2 3.2 6 37 72 4
42SHD0801 600 1.5 2.0 3.2 42 102 4 60

 Above is our partial products parameter, for more products pls contact us. OEM &ODM are welcomed.

Notice

1.Motors production
  All the proucts we sold here are manufactured by HangZhou FUDE  Technology Co., Ltd.,China.

2.Motors selection
  Please contact us to confirm the model and other details of the motor before purchase.

3.Payment
  We can serve samples and accept fully prepayment only . 50% advance is needed for bulk purchase and balance  before shipment .Paypal, Western Union, T/T are all accepted.

4.Delivery
  Samples in stock can be delivered within 7 days and customized samples within 30 days. Delivery date for bulk order depends on quantity.

5.Feedback and after-sale service
  Any problems in using are welcome to be informed !Our technician will give you professional advise. We will give you free maintenance within 24 months if the flaws are the result of production.

What’s More

                             Welcome to customize all types of stepper motors                                            
                                         
                                             Please feel free to contact us !

Screws and Screw Shafts

A screw is a mechanical device that holds objects together. Screws are usually forged or machined. They are also used in screw jacks and press-fitted vises. Their self-locking properties make them a popular choice in many different industries. Here are some of the benefits of screws and how they work. Also read about their self-locking properties. The following information will help you choose the right screw for your application.

Machined screw shaft

A machined screw shaft can be made of various materials, depending on the application. Screw shafts can be made from stainless steel, brass, bronze, titanium, or iron. Most manufacturers use high-precision CNC machines or lathes to manufacture these products. These products come in many sizes and shapes, and they have varying applications. Different materials are used for different sizes and shapes. Here are some examples of what you can use these screws for:
Screws are widely used in many applications. One of the most common uses is in holding objects together. This type of fastener is used in screw jacks, vises, and screw presses. The thread pitch of a screw can vary. Generally, a smaller pitch results in greater mechanical advantage. Hence, a machined screw shaft should be sized appropriately. This ensures that your product will last for a long time.
A machined screw shaft should be compatible with various threading systems. In general, the ASME system is used for threaded parts. The threaded hole occupies most of the shaft. The thread of the bolt occupy either part of the shaft, or the entire one. There are also alternatives to bolts, including riveting, rolling pins, and pinned shafts. These alternatives are not widely used today, but they are useful for certain niche applications.
If you are using a ball screw, you can choose to anneal the screw shaft. To anneal the screw shaft, use a water-soaked rag as a heat barrier. You can choose from 2 different options, depending on your application. One option is to cover the screw shaft with a dust-proof enclosure. Alternatively, you can install a protective heat barrier over the screw shaft. You can also choose to cover the screw shaft with a dust-proof machine.
If you need a smaller size, you can choose a smaller screw. It may be smaller than a quarter of an inch, but it may still be compatible with another part. The smaller ones, however, will often have a corresponding mating part. These parts are typically denominated by their ANSI numerical size designation, which does not indicate threads-per-inch. There is an industry standard for screw sizes that is a little easier to understand.
screwshaft

Ball screw nut

When choosing a Ball screw nut for a screw shaft, it is important to consider the critical speed of the machine. This value excites the natural frequency of a screw and determines how fast it can be turned. In other words, it varies with the screw diameter and unsupported length. It also depends on the screw shaft’s diameter and end fixity. Depending on the application, the nut can be run at a maximum speed of about 80% of its theoretical critical speed.
The inner return of a ball nut is a cross-over deflector that forces the balls to climb over the crest of the screw. In 1 revolution of the screw, a ball will cross over the nut crest to return to the screw. Similarly, the outer circuit is a circular shape. Both flanges have 1 contact point on the ball shaft, and the nut is connected to the screw shaft by a screw.
The accuracy of ball screws depends on several factors, including the manufacturing precision of the ball grooves, the compactness of the assembly, and the set-up precision of the nut. Depending on the application, the lead accuracy of a ball screw nut may vary significantly. To improve lead accuracy, preloading, and lubrication are important. Ewellix ball screw assembly specialists can help you determine the best option for your application.
A ball screw nut should be preloaded prior to installation in order to achieve the expected service life. The smallest amount of preload required can reduce a ball screw’s calculated life by as much as 90 percent. Using a lubricant of a standard grade is recommended. Some lubricants contain additives. Using grease or oil in place of oil can prolong the life of the screw.
A ball screw nut is a type of threaded nut that is used in a number of different applications. It works similar to a ball bearing in that it contains hardened steel balls that move along a series of inclined races. When choosing a ball screw nut, engineers should consider the following factors: speed, life span, mounting, and lubrication. In addition, there are other considerations, such as the environment in which the screw is used.
screwshaft

Self-locking property of screw shaft

A self-locking screw is 1 that is capable of rotating without the use of a lock washer or bolt. This property is dependent on a number of factors, but 1 of them is the pitch angle of the thread. A screw with a small pitch angle is less likely to self-lock, while a large pitch angle is more likely to spontaneously rotate. The limiting angle of a self-locking thread can be calculated by calculating the torque Mkdw at which the screw is first released.
The pitch angle of the screw’s threads and its coefficient of friction determine the self-locking function of the screw. Other factors that affect its self-locking function include environmental conditions, high or low temperature, and vibration. Self-locking screws are often used in single-line applications and are limited by the size of their pitch. Therefore, the self-locking property of the screw shaft depends on the specific application.
The self-locking feature of a screw is an important factor. If a screw is not in a state of motion, it can be a dangerous or unusable machine. The self-locking property of a screw is critical in many applications, from corkscrews to threaded pipe joints. Screws are also used as power linkages, although their use is rarely necessary for high-power operations. In the archimedes’ screw, for example, the blades of the screw rotate around an axis. A screw conveyor uses a rotating helical chamber to move materials. A micrometer uses a precision-calibrated screw to measure length.
Self-locking screws are commonly used in lead screw technology. Their pitch and coefficient of friction are important factors in determining the self-locking property of screws. This property is advantageous in many applications because it eliminates the need for a costly brake. Its self-locking property means that the screw will be secure without requiring a special kind of force or torque. There are many other factors that contribute to the self-locking property of a screw, but this is the most common factor.
Screws with right-hand threads have threads that angle up to the right. The opposite is true for left-hand screws. While turning a screw counter-clockwise will loosen it, a right-handed person will use a right-handed thumb-up to turn it. Similarly, a left-handed person will use their thumb to turn a screw counter-clockwise. And vice versa.
screwshaft

Materials used to manufacture screw shaft

Many materials are commonly used to manufacture screw shafts. The most common are steel, stainless steel, brass, bronze, and titanium. These materials have advantages and disadvantages that make them good candidates for screw production. Some screw types are also made of copper to fight corrosion and ensure durability over time. Other materials include nylon, Teflon, and aluminum. Brass screws are lightweight and have aesthetic appeal. The choice of material for a screw shaft depends on the use it will be made for.
Shafts are typically produced using 3 steps. Screws are manufactured from large coils, wire, or round bar stock. After these are produced, the blanks are cut to the appropriate length and cold headed. This cold working process pressudes features into the screw head. More complicated screw shapes may require 2 heading processes to achieve the desired shape. The process is very precise and accurate, so it is an ideal choice for screw manufacturing.
The type of material used to manufacture a screw shaft is crucial for the function it will serve. The type of material chosen will depend on where the screw is being used. If the screw is for an indoor project, you can opt for a cheaper, low-tech screw. But if the screw is for an outdoor project, you’ll need to use a specific type of screw. This is because outdoor screws will be exposed to humidity and temperature changes. Some screws may even be coated with a protective coating to protect them from the elements.
Screws can also be self-threading and self-tapping. The self-threading or self-tapping screw creates a complementary helix within the material. Other screws are made with a thread which cuts into the material it fastens. Other types of screws create a helical groove on softer material to provide compression. The most common uses of a screw include holding 2 components together.
There are many types of bolts available. Some are more expensive than others, but they are generally more resistant to corrosion. They can also be made from stainless steel or aluminum. But they require high-strength materials. If you’re wondering what screws are, consider this article. There are tons of options available for screw shaft manufacturing. You’ll be surprised how versatile they can be! The choice is yours, and you can be confident that you’ll find the screw shaft that will best fit your application.

China OEM 1.8 Degree Double Screw Shaft NEMA 8 Micro Stepper Motor (20SHD0002-100T1) with Best SalesChina OEM 1.8 Degree Double Screw Shaft NEMA 8 Micro Stepper Motor (20SHD0002-100T1) with Best Sales

China Good quality NEMA 8 Double Screw Shaft Linear Micro Stepper Motor (20SHD4255-100T1) with Great quality

Product Description

         2571 Wholesale NEMA 8 Double Screw Shaft Linear Micro Stepper Motor
                                                 
                                                  (20SHD4255-100T1) 

Product Information 

1) Raw Materials: Tested by Professional Precise Equipment.

2) 3 Inspection Lines

3) 1 Year Gurantee + Famous Chain Customers

 

Product Name
 		 Electric Stepper Motor
Dimensions
 		 Nema8(20mm), 11(28mm), 14(35mm), 16(39mm), 17(42mm), 23(57mm), 24(60mm), 34(86mm)
Step Angle
 		 Degree 0.9, 1.2, 1.8(Optional or Customized)
Torque
(oz.in)
 		 Up to 3.11, 5.7, 17,  41, 56, 85, 113, 425, 
Rated Current (A/Phase)
 		 0.1A~10A
Typical Applications
 		 Inject Printers, Analytical and Medical Instruments, Textile Equipment, Embroidery Machine, Precision Telescope Positioning Systems, High Speed Dome Camera and Robotics

Product Display

 Casun    HYBRID STEPPER MOTOR (20SHD4255-100T1) 

Motor Name: HYBRID STEPPER MOTOR

Size: NEMA 8 (20*20*38mm)

Feature: small volume, low noise, smooth running

The Outline Drawing of NEMA 8 Stepper Motor:
 

Casun    HYBRID STEPPER MOTOR 20SHD4255-100T1 
General Specification Electrical Specification
Step Angle
 		 1.8° Rated Voltage 7.5V 
Number of Phase
 		 2 Rated Current 0.6A
Insulation Resistance
 		 100MΩmin. (500V DC) Resistance per phase 12.5Ω±10%
Insulation Class
 		 Class B Inductance per Phase 5.5mH±20%
Rotor Inertia
 		 3.8g.cm² Holding torque 40mN.m
Mass
 		 0.08kg Detent torque 2mN.m

More Specification

 

Modle Holding Torque Rated Current Resistance per phase Inductance per phase

Detent

Torque

 Rotor inertia

Lead

wire

 Motor Length
mN.m A Ω mH mN.m g.cm² No. mm
42SHD571 200 0.7 12 15 7.5 20 4 26
42SHD0001 260 0.4 30 37 12 38 4 34
42SHD0002 280 0.6 22 28 12 38 4
42SHD0009 200 0.4 30 21 12 38 6
42SHD571 200 1.2 2.1 1.2 12 38 6
42SHD5712 400 0.5 25 50 18 57 4 40
42SHD5716 400 1.0 4.5 10 18 57 4
42SHD5719 300 1.2 3.2 3.0 18 57 6
42SHD0404 450 1.5 2.0 2.8 37 72 4 48
42SHD0441 420 1.2 3.2 6 37 72 4
42SHD0801 600 1.5 2.0 3.2 42 102 4 60

 Above is our partial products parameter, for more products pls contact us. OEM &ODM are welcomed.

Notice

1.Motors production
  All the proucts we sold here are manufactured by HangZhou FUDE  Technology Co., Ltd.,China.

2.Motors selection
  Please contact us to confirm the model and other details of the motor before purchase.

3.Payment
  We can serve samples and accept fully prepayment only . 50% advance is needed for bulk purchase and balance  before shipment .Paypal, Western Union, T/T are all accepted.

4.Delivery
  Samples in stock can be delivered within 7 days and customized samples within 30 days. Delivery date for bulk order depends on quantity.

5.Feedback and after-sale service
  Any problems in using are welcome to be informed !Our technician will give you professional advise. We will give you free maintenance within 24 months if the flaws are the result of production.

What’s More

                             Welcome to customize all types of stepper motors                                            
                                         
                                             Please feel free to contact us !

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on 1 side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is 1 element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.
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The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of 1 thread to the corresponding point on the next thread. Measurement is made from 1 thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in 1 revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.
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The lead of a screw shaft

Pitch and lead are 2 measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are 2 ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with 2 or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are 2 types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.
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The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.

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