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Old 04-03-2008, 01:53 AM   #11 (permalink)
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What about cutting o-ring glands in the existing bolts? That'd be easier than whipping up a complete new bolt and cut down on the cost as well. Thats of course assuming that the main bore in the bolt is not too large of a diameter that the grooves would pose a weak point or cut through the bolt completely.

Just a thought....
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Old 04-03-2008, 02:44 AM   #12 (permalink)
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Originally Posted by warpedmephisto View Post
What about cutting o-ring glands in the existing bolts? That'd be easier than whipping up a complete new bolt and cut down on the cost as well. Thats of course assuming that the main bore in the bolt is not too large of a diameter that the grooves would pose a weak point or cut through the bolt completely.
I was thinking the same thing......a quick lathe-job.

You'd have to use the thicker bolts, though, as you said, but I've seen significant ID/wall-thickness differences from manufacturer to manufacturer.

That being said, I've also seen significant differences in air-hole to retaining-pin-hole distance......1/8"-1/2"......in the various half-/mid-/fast-/turtle-back bolts.

The one time that I was getting TERRIBLE gas efficiency & blowback issues, I had JUST replaced a bolt, but I never held the two side-by-side and examined them. While they were both the same overall length, it turned out that the new bolt wasn't built to the same specs as my old one. With the new bolt, the marker's air passage and the bolt's inlet passage were more overlapping than actually lining-up. The resulting misalignment was causing a significant percentage of each charge to hit the bolt, itself, and then escape under it (fore & aft) and up its walls (into the feedneck). The visible result was feedline bobble and a puff of air getting blown into me eyes.

Getting out a set of calipers, or even magic-markering a pencil, would let you know if that's your problem.

If it is, just buy your bolts from the company that milled your body, and the problem should be solved......without the added drag of o-rings.
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Old 04-03-2008, 02:47 AM   #13 (permalink)
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...just keep in mind that when the gun is pumped, the rear oring comes out of the body...it can damage the orings...
Yah, they'd certainly shred fast.
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Old 04-03-2008, 06:15 AM   #14 (permalink)
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either way my main issue is the bolts are too loose in the chambers so either o-ringed bolts so they are tight or custom bolts to each gun. I have about 6 halblock bolts at my disposal and have found only one reall match to one of my halfblocks.
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Old 04-04-2008, 10:15 PM   #15 (permalink)
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so is there no luck for me? or will I have to try my hand at making some bolts? either I need to make them with o-rings or make them with much tighter tollerences to the bodies.
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Old 04-04-2008, 10:18 PM   #16 (permalink)
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Your best bet is to send them off to have oring grooves installed. I can do it when you send in ano work.
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Old 04-04-2008, 10:20 PM   #17 (permalink)
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lol just pmed you that same thing. I will send them out tomorrow.
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Old 04-07-2008, 08:05 PM   #18 (permalink)
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as for most of my custom issues go, Hvacman250 comes to the rescue. all of my pride an joys are on the way to him to be "Taken care of" in what ever way he can. thanks again.
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Old 04-23-2008, 09:22 PM   #19 (permalink)
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got the bolts back with the useual good work and speed. there is almost no blowback with the o-rings and minimal lag in the pump stroke
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