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 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.

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.

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.

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.