Product Description

Quick Details
Place of Origin: China (Mainland)                             Brand Name: XIHU (WEST LAKE) DIS.
Type: Solid/ hollow / self drilling                              Product Name: FRP Rebar
Name: High Modulus CZPT frp rebar                       Category: hollow grouting or solid anchor bolt
Application: Construction , Coal Mine, Tunnel, Metro, slope, foundation pit, etc.
Model Number: FRP glass full screw resin bolt                  Technique: Pultrusion winding
Surface treatment: Thread ,Anti-static/ sand-coated /customize      Feature: Light Weight
Dimensions: 4-55mm /customizable                           Material: Fiberglass &Resin
Chemical compositon: Fiberglass & unsaturated resin / expoxy      Rod density: 1.6 – 2.1g / m³
Color: Black\white\yellow\red\green Blue\Grey or Customized      Length: 1-12M or Customized
Thread: Left or Right Customized                              Ultimate Strain: 2%
Supply Ability: 3000 Meter/Meters per Day                      Anti static: 3*10000000 Ω
Tensile strength: >600MPa                                    E-modulus: 40GPa .
Shear strength: 150MPa                                      Certificate: ISO9001-2000,GB/T19001-2008
 
 
Fiberglass Rebar adopt glass fiber as reinforced materials and  polyester resin as basic materials, through Pulled by specific traction machine, be solidified glass fiber reinforced plastic rod body with full thread under high pressure and high temperature by preformed matched die . It is made up of fiberglass anchor rod plus resin anchoring agent, tray and nut.
The Solid Bolt is used in Mining, Tunneling and Civil Engineering widely. It provides more possibilities as an alternative to metal. The GFRP Solid Bolt is manufactured with high quality GFRP material(Glassfiber Reinforced Polymer). The GFRP Solid Bolt have a high tensile load and bearing capacity with accessories, but the weight is only 1 quarter of metal product.
 
Applications    
Fiber glass rebar, FRP rebar, GFRP rebar, CZPT rebar,reinforcing bar with diameter from 4mm to 55mm.manufactures CZPT Rebars by combining the pultrusion process and an in-line winding & coating process for the outside sand surface.  As compared to con-ventional steel rebars, CZPT rebars should be a suitable alternative to steel reinforcing in:
 ·Architectural Concrete: cast stone, architectural cladding, balusters, column facades, window lentils, architectural precast elements, hand railing, and statuary and fountains, etc.
 ·Concrete exposed to de-icing salts in: bridge decks, railroad grade crossings, median barriers, parking garage elements, and salt storage facilities, etc.
 Concrete exposed to marine salts in: seawalls, water breaks, buildings & structures near waterfront, CZPT operations, and floating marine docks, etc.
 ·Applications Subjected to Other Corrosive Agents: Wastewater treatment plants; petrochemical plants; pulp/paper mills; liquid gas plants; pipelines / tanks for fossil fuel; cooling towers; chimneys; mining operations of various types; nuclear power and dump plants.
 ·Applications Requiring Low Electric Conductivity or Electromagnetic Neutrality: Aluminum and copper smelting plants; manholes for electrical and telephone communication equipment; bases for transmission / telecommunication towers; airport control towers; magnetic resonance imaging in hospitals; railroad crossing sites, and specialized military structures.
 ·Tunneling / Boring Applications Requiring Reinforcement of Temporary Concrete Structures: Structures including mining walls; underground rapid transit structures and underground vertical shafts. 
 ·Weight Sensitive Structures: Concrete construction in areas of poor load bearing soil conditions, remote geographical locations, sensitive environmental areas, or active seismic sites posing special issues that the use of lightweight reinforcement will solve. 
 ·Thermally Sensitive Applications: Apartment patio decks; thermally insulated concrete housing and basements; thermally heated floors and conditioning rooms.  
1. Mining support
2. Face bolting
3. Soil nail
4. Slope stabilization
5. Permanent application
6. Temporary support
7. Subway tunnel
8. Building construction
9. Seawall damming
10. Rock supporting
11. foundation pit wall
12. Port of foundation pit
13. Roadway support
14.Tunnel construction, etc.
 
Advantages:
1. All-thread (stronger bonding with the grouting material)
2. Low weight (1/4 weight of steel anchor bolt)
3. High durability ( unaffeced by acid rain, salt water, and most chemicals)
4. Strong adhesion and anchorage force
5. High corrosion resistance , anti-static, High rotproofness
6. High torque resistance
7. 100+ years service life
8. Easy handling due to low weight
9. Fire retardant
10. Impact resistant
11. Nonconductive and thermal insulation
12. Non-magnetic electromagnetic transparency
13. Dimensional stability, Bright color
14. Low-maintenance
15. Cuttability, easy cutting
16. High torsion resistance
17. Anti-static coating (optionally)
18. Long service life
19. High tensile load
20. Deformation patterns are the same as with steel
21. Coefficient of thermal expansion more similar to concrete than that of steel
22. Direct production costs lower than similar steel bolt
23. Strongly adapt to the environment, and no emmiting the electromagnetic wave
 
FRP Rebar Other Features:
Non-flammable:  It is non-flammable and has high thermal insulation;
Cutability  :  It avoids damages to cutter heads, and does not delay excavation
Save cost : Use this material as reinforcing bars for road and bridge, could reduce Secondary repair cost.
 
 Accessory products
 1. Anchor bolt : the important construction of the assembly, plays a major role in the anchor and
support.
2. The head of the anchor drill: barb can be bolt positioning in the drilled holes, the middle rod body
good.
3. Coupling: easy to manage, unlimited application range.
4. Anchor plate : bear greater stress of surrounding rock.
5. Nut: the surrounding rock stress concentrated on the pad.
6. GFRP Plate, GFRP Nut , GFRP Coupler, Anchor Drill Bit, steel Nut, Steel coupler, steel plate, other types are available as requested
7. Rebar : the important construction of the assembly, plays a major role in the anchor and support.
8. The head of the anchor drill: barb can be bolt positioning in the drilled holes, the middle rod body good.
9. Coupling: easy to manage, unlimited application range.
10. Anchor plate : bear greater stress of surrounding rock.
11. Nut: the surrounding rock stress concentrated on the pad.
Glass reinforced plastic anchor rod with circular arc tooth profile FRP nut thread suit, 
glass fiber reinforced plastic nut near 1 end of the glass fiber reinforced plastic pallet 
stretch narrow neck formation, glass fiber reinforced plastic tray set it on the neck of the glass fiber reinforced plastic nut, glass reinforced plastic anchor rod in the middle of the paragraph to the polished rod structure. The utility model tensile, shear and torsion strength is strong, the production cost is low,  the supporting effect is good, can be applied to all have the special circumstances of flammable and explosive.
 

 
Technical Data

FRP Rock Bolt Test Unit				MGSL18	NGSL20	MGSL22	MGSL24	MGSL27
Rod	Surface			Uniform appearance, no bubble and flaw
	Nominal Diameter/mm			18	20	22	24	27
	Tensile load/KN			160	210	250	280	350
	Tensile Strength/MPa			600	600	600	600	600
	Shearing strength/MPa			150	150	150	150	150
	Torsion/Nm			45	70	100	150	200
	Antistatic			3*107	3*107	3*107	3*107	3*107
	Flame Resistance	Flaming	s	≤6	≤6	≤6	≤6	≤6
			s	≤2	≤2	≤2	≤2	≤2
		Flaming burning	s	≤60	≤60	≤60	≤60	≤60
			s	≤12	≤12	≤12	≤12	≤12
Plate	Plate load strength/kN			70	80	90	100	110
	Central diameter/mm			28±1	28±1	28±1	28±1	28±1
Nut	Nut load strength/kN			70	80	90	100	110

 
 
FRP bolts/Fiber reinforced plastics bolts/GFRP Anchor Rock Bolts Parameter

Unit		Hollow Rock bolt			Self-drilling Rock bolt
Diameter	mm	12/25	12/28	32/15	12/25	12/28	32/15
External	mm	25	28	32	25	28	32
cross section	mm^2	345	450	563	345	450	563
Thread distance	mm	10	10	10	12.7	12.7	12.7
Thread direction		right	right	right	left	left	left
Tensile Load	kN	230	300	380	250	330	400
Tensile strength	Mpa	650	650	650	650	650	650
Torsion	Nm	80	110	200	120	200	250
Shear strength	MPa	150	150	150	150	150	150
Elongation	%	2.5	2.5	2.5	2.5	2.5	2.5
E-modulus	Gpa	40	40	40	40	40	40
weight	g/m	642	896	1156	642	896	1156

 
 
FRP rock bolt equipment
1. Productive technology: full thread FRP rock bolt body once molding
2. Production speed: fast speed, can produce ≥1.5 M per minute
3. Rod body torsion: big torsion, different rod body the torsion can be as high as 60NM-160NM
4. Rod body and nut cooperate closely, the coverall performance is good
5. Big bearing capacity, tray and nut is patented product, the maximum bearing capacity can reach more than 150KN
6. Long production time: it can continuously all day long production, trouble-free
7. Formula science, save material, the product quality is stable
8. Equipment performance in the domestic similar products leading level, simple operation, easy to control, lifelong technical
Method of application for FRP rock bolt
After the roofbolter finished drilling, remove the drill pipe, make the six-party of rock bolt installation machine insert jumbolter drill pipe connection, then make the lever genus part of compression nut insert the rock bolt installation machine, make anchoring agent into the rock bolt holes, then use the rock bolt bracing anchoring agent, at this time do propulsion leg movement, drilling machine motor not rotating, anchoring agent will be sent to the bottom of the hole, at this point to start drilling machine motor rotating, rotating rock bolt to stir anchoring agent, when the FRP rock bolt reached the bottom of the hole, stop the machine, drilling machine fast rotating to stirring anchoring agent, stirring time is set time of anchoring agent (usually 10 s ~ 15 s ), close the drilling machine, stop rotating, according to the anchoring agent curing time, general stop 30 s ~ 45 s, after anchoring agent curing, ant then make drilling machine to start rotating, screw up the nut for bottom of rock bolt, at this time drilling machine motor stop rotating, rock bolt install end
Safety matters need attention
1. When installation the rock bolt, not allowed holding the rock bolt, lest produce an accident
2. Finished the rock bolt, when the drilling machine drops, can’t make the hand on the gas leg, prevent hurting hands
3. When use the jumbolter to installation tray and nut, must master the use of the drilling machine and anchoring agent, when install the nut must immediately stop the machine, otherwise it will damage FRP bolt
4. Please use the resin bolt anchoring agent that complies with safety srandards
5. Transportation store
6. In the process of product transportation shall not be cast and throw.
7. The rod body should be stored in a cool and dry place, rod body storage time no more than 1 year.
8. End of the anchoring can not contaminated with oil, rod body tail thread shall not damage
 
Technical parameters of the product

Diameter (mm)	Length (mm)	Pallet dimension (mm)	Standard value of tensile strength(MPa)	Ultimate load of the bolt (KN)	Bearing capacity of end connection and whorl (KN)	Bolt torque (N.m)
16	1200~1800	120×120×6	≥300	80	≥50	≥40
18	1200~2000	120×120×10	≥300	100	≥60	≥40
20	1200~3000	140x140x8 150×150×8	≥300	120	≥70	≥40
22	1600~3000	150×150×10 170x 170x 10	≥300	140	≥80	≥40
24	1800~3000	150×150×10	≥300	160	≥90	≥40

 
   Hollow grouting bolt characteristics
 1. The function of bolt and grouting pipe is combined, when grouting, it is grouting pipe, after grouting,
    no need to dial out to become a bolt.
2. The hollow design enables the anchor rod to realize the grouting pipe function, avoids the mortar
    loss which the traditional construction craft pipe grouting causes.
3. Grouting full, and can realize the pressure grouting, improve the quality of the project.
4. Because of the role of accessories, the middle of the rod is very good, mortar can anchor the whole
    body wrapped, to avoid the risk of corrosion, to achieve long-term support purposes.
5. Convenient installation, without on-site processing of thread, you can easily install the plate, nut.
6. Combined with the special bolt grouting pump and grouting technology, it is the anchor system
    which has solved many problems of traditional anchor support at home.
 
Technical Index of Fiberglass Rebar

Diameter(mm)	Cross Section(mm2)	Density(g/cm3)	Weight(g/m)	Ultimate Tensile Strength(MPa)	Elastic Modulus(GPa)
3	7	2.2	18	1900	>40
4	12	2.2	32	1500	>40
6	28	2.2	51	1280	>40
8	50	2.2	98	1080	>40
10	73	2.2	150	980	>40
12	103	2.1	210	870	>40
14	134	2.1	275	764	>40
16	180	2.1	388	752	>40
18	248	2.1	485	744	>40
20	278	2.1	570	716	>40
22	355	2.1	700	695	>40
25	478	2.1	970	675	>40
28	590	2.1	1195	702	>40
30	671	2.1	1350	637	>40
32	740	2.1	1520	626	>40
34	857	2.1	1800	595	>40
36	961	2.1	2044	575	>40
40	1190	2.1	2380	509	>40

 
Technique chart:

 

 
Packaging & Delivery
Packaging: Bundle with pallet, Bolts packed in bundles and accessories packed in cartons.
Packed with steel wires or other way as customers requirement.
Delivery Time: within 20 days
Lead Time ::within 20 days
 
 
Our Services
    As 1 of the leading suppliers of pultrusion fiberglass reinforced polymer CZPT products, we can provide you FRP tubes, Channel, I-beam, angle, Rebar, rods,Garden stakes, gratings. 
     Customized shape service is available from us, just send us CAD drawing or contact us direatly.  For moulds, TT 100% before making; for products, TT 30% in advance, 70% balance payment on receiving bill of lading by Email or before delivery.
    Researches and development team by knowing the importance of the FRP usage in industry and construction , have successfully conducting different researches and studies projects.
Design and engineering services has been given idea from customers, and make out the thing you imaged. Specially developing on new machinary. 
Istallation and construction team is experienced with installation, commissioning and training service at cutomer’s factory. In this way, the customer is CZPT to handle management of equipment themsleves soon. 
Mantiance service is applied when customer cann’t solve problem themselves. Mainly at equipment, software, tools…etc.
Technical support is the most importance in production. as long as frp developing, new and advanced process, material, equipments appeared. We are  giving the eyes on the world frp relatived news and supply customer advanced service.
 
 
FAQ
Q: Are you a trading company or factory?
A: our factory is a FRP manufacturer in China.
Q: Can you factory customize the machine for clients?
A: yes, we can. 
Q: what are you payment terms?
A: Normally, 50% as the deposit first by T/T, the rest 50% will be paid before shipping by T/T.
Q: How about after-sales service?
A: 1 year free warranty, Lifetime technical service support.
 
Please Contact Us
 Miss: lydia
 
http://chinainsulation
 
 
 
 

 

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.

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.

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.

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.