Size difference between .177 and .22 Disco bolt
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Size difference between .177 and .22 Disco bolt
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Topic: Size difference between .177 and .22 Disco bolt (Read 1322 times))
Stefan
Plinker
Posts: 263
Size difference between .177 and .22 Disco bolt
«
on:
December 07, 2011, 09:29:56 AM »
OK,
I have an extra disco breech, an extra disco .22 bolt and 10 inch .177 barrel.
I have to make this bolt to fit the barrel - whats the difference, besides smaller o ring used on .177? I measured 5,1 mm at the current bolt for 5,5mm (that mushroom head part), I suppose it should be smaller than that to fit the 4,5mm pellets bore.
Is there some difference in length perhaps?
Also, the end of the barrel that goes into the breech, does it have to be machined in some specific way, or just cut flat and inlet done properly? And what size of the hole should be made to fit the standard TP?
Thanks in advance
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rsterne
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Bob and Lloyd
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Real Name: Bob
Re: Size difference between .177 and .22 Disco bolt
«
Reply #1 on:
December 07, 2011, 01:59:09 PM »
The bolts are the same length.... The nose is a different shape and the O-ring is a different size.... The barrel port is the same size (0.134`` ID)and in the same location, and the recess in the bottom for the transfer port is also the same diameter and depth.... The barrel has a tapered lead to allow proper seating of the O-ring and to insure that the pellet is guided smoothly into the bore.... I don`t have detailed dimensions.... but they would be needed for what you want to do....
Bob
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
Stefan
Plinker
Posts: 263
Re: Size difference between .177 and .22 Disco bolt
«
Reply #2 on:
December 07, 2011, 03:35:48 PM »
well I hope some1 here has them
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https://www.ebay.com/str/agcustompartsandaccesories
Benjamin Discovery .22, M-Rod trigger, Hawke AirMax 4-12x40
BSA Scorpion .177, Altaros regulator, MTC Viper 10x44
Daystate Air Ranger .177, Hawke Sidewinder 8-32x56 20X Mil Dot
Hatsan Hercules .35, MTC Viper 6-24x56
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Size difference between .177 and .22 Disco bolt