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1/25/2018 7:38:29 AM
Posted: 3/30/2006 12:45:21 AM EST
[Last Edit: 3/30/2006 12:45:29 AM EST by metroplex]
What is the pilot OD for 7.62x39 thread alignment tools?
I measured the ID in between the grooves to be 0.300" while the lands were 0.311"

I'd imagine the TAT pilot has to fit between the grooves. A bullet with an O-give of 0.308" will not pass through my bore manually, so the pilot has to be smaller than .308"
Link Posted: 3/30/2006 3:10:54 AM EST
Mine measures .2985" OD for the pilot.
Link Posted: 3/30/2006 3:28:59 AM EST
Is it a tight fit or a loose fit when you insert it into the bore?
Link Posted: 3/30/2006 12:14:18 PM EST
[Last Edit: 3/30/2006 12:22:59 PM EST by Hammer in PA]
To be honest mine isn't tight or loose. It kinda just slips into the bore. You don't want it to tight because it rotates as you start your first few threads. Then it's removed and you use the threads that were started to engage the die whithout the TAT to finish your threads. You will want to open up the die thread to make your first cuts and then check how the muzzle brake fits. If it's to tight on the threads you will then need to close the die a litlle bit and make another cut. Check the muzzle brake fit after each cut.

I use plenty of oil on the die and the pilot when starting the first cut and for finishing. Also make a little cut then back the die out and clean it then start over. You don't want to make the whole cut without removing the die and cleaning it and re-oiling it.

Sorry if I rambled on but I don't know how proficient you are.

Good Luck.
Link Posted: 3/30/2006 2:45:47 PM EST
mine is brand new
and is .304
Link Posted: 3/30/2006 2:47:58 PM EST

Originally Posted By socandyman:
mine is brand new
and is .304

and that fits fine in a 7.62x39 bore? My caliper indicates the distance between 2 grooves was 0.300" or about 0.299", while it's about 0.311" between the lands. This makes sense because the bullet is squeezed through the bore when you fire, and because a bullet w/ a .308" ogive won't fit into the bore manually.
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