Firearm & Gun Forum - FireArmsTalk.com > Long Guns > General Rifle Discussion > How to index a brake?

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Old 07-25-2013, 01:43 PM   #11
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Quote:
Originally Posted by hoovco
Your variables in this equation are the thread pitch, and the degrees ahead of timing.
A threaded barrel with a thread pitch of 5/8 - 24 has a 5/8" inch threaded diameter and 24 threads per inch of threaded barrel.

Every 360 degree turn of a device advances the device 1/24th of an inch.

1/24 = 0.04166666666 inch

0.04166666666/ 360 = 0.00011574074

Every degree turned advances the device 0.00011574074 inch

So if my device, torqued down to spec is advanced 45 degrees ahead of being timed, I would have to create a shim that is 0.00520833333 inch.

That's the exact answer I'm looking for! Thanks hoovco


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Old 07-25-2013, 02:43 PM   #12
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and if a crush washer is used, what's all of this mean to us?



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Old 07-25-2013, 04:11 PM   #13
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Quote:
Originally Posted by bildee
and if a crush washer is used, what's all of this mean to us?
Just torque it down until it lines up. It's a crush washer. It flattens so you can index your device.
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Old 07-25-2013, 04:12 PM   #14
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Quote:
Originally Posted by hoovco

Just torque it down until it lines up. It's a crush washer. It flattens so you can index your device.
A shim is the best way to do it though. I only use crush washers on the old birdcage flash hiders.
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