NOTE!
•
Refer to the wrench calibration instructions on the previous page or follow
guidelines set forth by the railroad. If the torque setting of a particular
fastener type is critical, the wrench should be set as close to the desired
torque as possible and a calibrated torque wrench used to verify or check
the fastener torque periodically.
Size
Wrench PSI
Torque FT. LB
Tension LB
3/4"
460
300
21,500
7/8"
500
485
29,500
1"
540
730
39,000
1 1/8"
565
900
46,000
1 3/8"
750
1700
69,000
Size
Wrench PSI
Torque FT. LB
Tension LB
3/4"
470
400
28,000
7/8"
525
640
36,000
1"
600
960
50,000
1 1/8"
670
1360
63,000
1 3/8"
890
2500
95,000
6.3.
Torque / Tension calibration
Grade 5 – track and frog bolts:
Grade 8 – Track and frog bolts:
WARNING!
•
Over-torquing bolts will cause bolt failure under traffic.
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OPERATION AND MAINTENANCE MANUAL I ENG_OMM_IMPACT_WRENCH_P01 I 09th November 2021
@Pandrol 2021
