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Anchor bolt

no longitudinal rib screw steel type resin anchor rod body
Click:  Update:2016-12-12 10:24:57  【Print】  【Close

MSGLW rodless longitudinal rib screw thread steel resin bolt metal products are widely used in underground rock roadway, half coal rock drift and coal roadway bolt supporting, especially for downhole complicated conditions of tunnel and cavern support. The products and resin anchoring agent supporting the use of, its characteristics: 1, fast increase of strength, high strength, after installation can not only timely under load and large anchoring force; 2, convenient installation and operation, low labor intensity of workers, high support efficiency; 3, tons of coal support cost greatly reduced. The main material of the steel reinforced bar with no longitudinal ribs is preferred. The yield strength is greater than 335MPa, 400MPa, 500MPa, 600MPa, and the use of torque nut, which can improve the installation speed and improve the pre tightening force. The specification model can be designed and selected according to different uses, geological conditions and strength requirements.

Technical standard for the metal bar body of the non longitudinal rib screw steel

 

1, the shape size and allowable deviation (unit: mm)

 

Specifications

Rod diameter D

Rod diameter

Transverse

rib height

Transverse rib spacing


Nominal

Size

Allow

Deviation

Nominal

Size

Allow

Deviation

Nominal

Size

Allow

Deviation

Nominal

Size

Allow

Deviation

Φ18

18

0.5

0.1

21

1.3

0.7

1.5

±0.4

13.3

±0.5

Φ20

20

0.5

0.1

23

1.3

0.7

1.5

±0.4

13.3

±0.5

Φ22

22

0.3

0.2

23.6

0.9

0.6

0.8

0.3

0.2

12

 ±0.8

 

2, mechanical properties

Brand number

Yield strengthMPa

Tensile strengthMPa

Elongation%

MG335

335

490

15

MG400

400

570

MG500

500

660

MG600

600

800