zog
Senior Member
- Location
- Charlotte, NC
42 ft-lbs wont get you very far for most switchgear connections, are you following ANSI standards for torque values? A SAE 7 grade 7/16" bolt require 44 ft-lbs. An SAE 5 grade 1/2" bolt is 48 ft-lbs.
42 ft-lbs wont get you very far for most switchgear connections, are you following ANSI standards for torque values? A SAE 7 grade 7/16" bolt require 44 ft-lbs. An SAE 5 grade 1/2" bolt is 48 ft-lbs.
The biggest problem I typically see is a lack of torque information listed on the gear.
I guess that it also depends on whether you're torquing bolts or lugs. Most of our switchgear comes with the lugs already installed so generally we only torque the lugs. The biggest problem I typically see is a lack of torque information listed on the gear.
Back in the dark ages when I decided to use torque wrenches, bending beam were not only less expensive but more accurate than other styles. Field calibration is very easy. Other than always having to be able to see the pointer when using, why would I want to spend dollars on something that needs to be calibrated every time it falls off the front seat of my pickup?
42 ft-lbs wont get you very far for most switchgear connections, are you following ANSI standards for torque values? A SAE 7 grade 7/16" bolt require 44 ft-lbs. An SAE 5 grade 1/2" bolt is 48 ft-lbs.