Torque wrenches and caliper bolts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GCncsuHD · 08-16-2012, 09:06 PM

Dave, when all else fails, you can usually go by a chart according to the size of the bolt and the bolt material. The exception being when threading into something softer like aluminum, or TTY bolts etc.

Here is one you can go by, note that the max torque is 54 ftlbs for a 7/16 bolt like that in grade 5, and that is a dry torque. Any anti seize or oil used would reduce that to roughly 40.

http://www.engineershandbook.com/Tables/torque.htm

Of course if you can first get proper information like that 30ftlbs for the bolt as spec'd by GM, go by that.

08-16-2012, 09:06 PM	#11
GCncsuHD Charlie Daniels w/ a Tq Wrench Join Date: May 2009 Location: Statesville, NC Posts: 1,570	Re: Torque wrenches and caliper bolts Dave, when all else fails, you can usually go by a chart according to the size of the bolt and the bolt material. The exception being when threading into something softer like aluminum, or TTY bolts etc. Here is one you can go by, note that the max torque is 54 ftlbs for a 7/16 bolt like that in grade 5, and that is a dry torque. Any anti seize or oil used would reduce that to roughly 40. http://www.engineershandbook.com/Tables/torque.htm Of course if you can first get proper information like that 30ftlbs for the bolt as spec'd by GM, go by that. __________________ ΜΟΛΩΝ ΛΑΒΕ 67 C10 Shortbed "Great Grandpa's Truck" I6 3 on the Tree 71k original miles 5.3 swap in the works 69 K5 Blazer-Family Beach Cruiser Project 78 K30 Dually Semi-Retired Fire Truck 350/SM465 35"s SOLD01 2500HD ECSB 6.0 4x4 5.13's 8" lift 38"s



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