Top Chinese supplier of wind turbine founation anchor bolt.

Hot-rolled Continurous Thread Rock Bolt

Hot Rolled Continurous Thread Bar Rock Bolt

Rock Bolt Types:

There are 2 types of rock bolt with different raw materials – Hot Rolled Threaded Rebar and Rebar with Thread Rolling Process. Threaded rebar can be directly used with nut with no thread rolling process, it only need to be cut to length; for rebar with no continuous thread, thread rolling and inspection is needed. Bolt Nut used for threaded rebar and thread deformed bar is also different, which is decided by thread dimension. Rock Bolt with Hot Rolled Continuous Thread Rebar and Heat Treated Thread Deformed Bar can be used in most applications with no difference.

Continurous Threaded Rebar Rock Bolt Types:

Hot Rolled Threaded Bar Production

Dimensions of Threaded Rebar Rock Bolt

Diameter dh/mm dv/mm h/mm b/mm I/mm r/mm a
/mm Size Tolerance I Size Tolerance Size Tolerance Size Tolerance i Size | Tolerance
15 147 ±0.2 14,4 ±0.5 1.0 ±0.2 4.2 ±0.3 10.0 ±0.2 0.5 78.5*
20 20.0 ±0.4 20.0 +0.4-0.8 1.3 ±0.3 4.8 ±0.5 10.0 1.2 80.5
25 250 25.0 +0.4-0.8 1.6 6.0 12.0 1.5 81*
32 32.0 ±0.5 32.0 +0.5-1.2 2.0 ±0.4 7.0 16.0 2.0 81.5*
36 36.0 36.0 2.2 ±0,4 8.0 18.0 ±0.3 2.5 81.5
40 40.0 40.0 2.5 ±0.5 8.0 20.0 2.5 81.5*
50 50.0 50.0 3.0 -0.5 9.0 24.0 2.5 81.8
63.5 63.5 63.5 3.0 ±0.6 12.0 22.0 ±0.4 2.5 84*

Mechanical Property of Threaded Rebar Rock Bolt

Mechanical Properties
Diameter /mm Cross- sectional area/mm2 Weight (kg/m) PSB830 PSB930 PSB1080
Min Yield Stress/Load Min Utimate Stress/Load Min Yield Stress/Load Min Utimate Stress/Load Min Yield Stress/Load Min Utimate Stress/Load
Mpa KN Mpa KN Mpa KN Mpa KN Mpa KN Mpa KN
15 177 1.4 830 147 1030 182 930 165 1080 191 1080 191 1230 218
20 314 2.47 830 261 1030 323 930 292 1080 339 1080 339 1230 386
25 491 4.1 830 408 1030 506 930 457 1080 530 1080 530 1230 604
32 804 6.65 830 667 1030 828 930 748 1080 868 1080 868 1230 989
36 1018 8.41 830 845 1030 1049 930 947 1080 1099 1080 1099 1230 1252
40 1257 10.34 830 1043 1030 1295 930 1169 1080 1358 1080 1358 1230 1546
50 1963 16.28 830 1629 1030 2022 930 1826 1080 2120 1080 2120 1230 2414
Elongation at fracture A/% ≥7 ≥7 ≥6
Total Elongation at max force Agt/% ≥3.5
Relaxation at 1000h ≥4
Modulus of elasticity/Mpa 2*10^5

Length Chart of Threaded Rebar Rock Bolt​

Dia (mm) Length of Bar (L mm)
1400 1600 1800 2000 2200 2400 2600 2800 3000
16 + + + +
18 + + + +
20 + + + +
22 + + + +
25 + + + +
Note: 1. + means precedence length 2. According to customers requirements, other specific length are available

Threaded Rebar Rock Bolt Application

Top