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Old 04-12-2014, 11:30 PM   #11
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In regards to torque, what is the proper torque for the 5/8 inch Grade 8 bolt, non-lubricated? Right now, they are at 150 ft / pounds, which is probably a shade low. I've seen specs from 150 to 230. I staged them up to 150 via hand tight, wrench tight, 50, 100, 125 then 150. If they need to be a shade higher, not a big deal. All were torqued with a Snap-On torque wrench, so not a cheapo by any means.

5/8-11 Gr 8 Dry 230Max

So at 150 Dry, you're good to go!

http://www.engineershandbook.com/Tables/torque.htm
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Old 04-12-2014, 11:32 PM   #12
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In regards to torque, what is the proper torque for the 5/8 inch Grade 8 bolt, non-lubricated? Right now, they are at 150 ft / pounds, which is probably a shade low. I've seen specs from 150 to 230. I staged them up to 150 via hand tight, wrench tight, 50, 100, 125 then 150. If they need to be a shade higher, not a big deal. All were torqued with a Snap-On torque wrench, so not a cheapo by any means.
I TQ mine to 150ftlbs , according to the Structural repair manual of the 727 Tq specs I have at work for the said fasteners. No reason to step TQ, just tighten down then TQ in a fluid motion , not jerky or stopping. Never do we step TQ any fasteners in the acft field and I have never seen it done in 31 years , even when I was working at the factory (McDonnell Douglas defense) for a short time.
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Old 04-12-2014, 11:44 PM   #13
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Thanks for the info. 150 it'll be then. Maybe not necessary to step torque, but, if nothing else my arms got a small work out.
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Old 04-12-2014, 11:48 PM   #14
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Thanks for the info. 150 it'll be then. Maybe not necessary to step torque, but, if nothing else my arms got a small work out.
Might not be necessary to step torque, but I always have and do. Started when building engines on head bolts, rods, mains, lug nuts, etc.
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Old 04-12-2014, 11:51 PM   #15
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Might not be necessary to step torque, but I always have and do. Started when building engines on head bolts, rods, mains, lug nuts, etc.
X2.
Some of specs call for it

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Old 04-12-2014, 11:52 PM   #16
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Kind of where I got the habit from. My brother-in-law does a lot of the engine building / hot rod stuff.
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