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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

Diameterdh/mmdv/mmh/mmb/mmI/mmr/mma
/mmSizeTolerance ISizeToleranceSizeToleranceSizeTolerancei Size |Tolerance
15147±0.214,4±0.51.0±0.24.2±0.310.0±0.20.578.5*
2020.0±0.420.0+0.4-0.81.3±0.34.8±0.510.01.280.5
2525025.0+0.4-0.81.66.012.01.581*
3232.0±0.532.0+0.5-1.22.0±0.47.016.02.081.5*
3636.036.02.2±0,48.018.0±0.32.581.5
4040.040.02.5±0.58.020.02.581.5*
5050.050.03.0-0.59.024.02.581.8
63.563.563.53.0±0.612.022.0±0.42.584*

Mechanical Property of Threaded Rebar Rock Bolt

Mechanical Properties
Diameter /mmCross- sectional area/mm2Weight (kg/m)PSB830PSB930PSB1080
Min Yield Stress/LoadMin Utimate Stress/LoadMin Yield Stress/LoadMin Utimate Stress/LoadMin Yield Stress/LoadMin Utimate Stress/Load
MpaKNMpaKNMpaKNMpaKNMpaKNMpaKN
151771.48301471030182930165108019110801911230218
203142.478302611030323930292108033910803391230386
254914.18304081030506930457108053010805301230604
328046.658306671030828930748108086810808681230989
3610188.4183084510301049930947108010991080109912301252
40125710.348301043103012959301169108013581080135812301546
50196316.288301629103020229301826108021201080212012302414
Elongation at fracture A/%≥7≥7≥6
Total Elongation at max force Agt/%≥3.5
Relaxation at 1000h≥4
Modulus of elasticity/Mpa2*10^5

Length Chart of Threaded Rebar Rock Bolt​

Dia (mm)Length of Bar (L mm)
140016001800200022002400260028003000
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

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