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February 20, 2001, 20:03
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#1 |
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Registered
FALaholic #: 2558 Join Date: Feb 2001
Location: Port Townsend, Washington, 98368
Posts: 11
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Oversize locking shoulder
I have an L1A1 parts set that I got way back when Century first began importing them.
From the appearance of the parts it appears to have been virtually unused! Non of the internals show any wear or rub marks, the barrel looks like it's absolutely pristine. About the only parts that look somewhat used are the bolt and bolt carrier. I hand tightened the barrel onto my DSA receiver with the breaching washer it came with and it goes to 11 o'clock. The washer may have been refinished, but it looks like it is also brand new. It also came with a locking shoulder, specifically a #4. My question: what dimension is a #4 locking shoulder? Thanks, [ July 24, 2001: Message edited by: gary.jeter ]
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You will not rise to the level of your expectations. You will fall down to the level of your training. Train well. |
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February 20, 2001, 21:26
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#2 |
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Registered
FALaholic #: 2710 Join Date: Feb 2001
Location: WI
Posts: 21
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I'm not sure what demension a #4 is but even if I did I would measure it to be sure. You should measure it with a good vernier caliper or micrometer.
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February 20, 2001, 22:30
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#3 |
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Arrogant Bastard
Gold Contributor
FALaholic #: 96 Join Date: Jul 2000
Location: Surprise, AZ
Posts: 15,746
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a number 4 should be a .2974 (std) shaft diameter with a .264" face
------------------ T. Mark "Gunplumber" Graham gunplumber@arizonaresponsesystems.com Arizona Response Systems 5501 North 7th Avenue, Phoenix, AZ 85013 623-873-1410 http://www.arizonaresponsesystems.com
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T. Mark Graham Master Gunsmith Arizona Response Systems, LLC |
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February 21, 2001, 00:08
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#4 |
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Moderator & Collectaholic
FALaholic #: 45 Join Date: Jul 2000
Location: New Zealand
Posts: 2,879
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I hate to disbute GP about a few thou. If the locking shoulder is a "inch" one, then a #4 has a shaft diameter of 0.2978 with a locking shoulder size of 0.264
 Standard has a diameter of 0.2978 1st over size has a diameter of 0.2982 2nd over size has a diameter of 0.2990 3rd over size has a diameter of 0.2998 There is a total of 60 different sized locking shoulders that the Australian's made. 15 locking shoulder sizes 0.261 - 0.275 in 4 shaft diameters, as stated above The above info is from the Australian Electrical Mechanical Engineering Instructions, WPN D 254 Iss 7, Nov 92 ------------------ Kevin Adams Rifle, 7.62 mm, L1A1 Collector & Researcher. NEW ZEALAND [This message has been edited by NZ L1A1 Collector (edited February 21, 2001).]
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Rifle, 7.62 mm, L1A1 Collector & Researcher. NEW ZEALAND |
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February 21, 2001, 14:20
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#5 |
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Arrogant Bastard
Gold Contributor
FALaholic #: 96 Join Date: Jul 2000
Location: Surprise, AZ
Posts: 15,746
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Well I certaintly won't dispute THE MASTER on this - I actually didn't have a listing for the standard shaft diameter. I had it for the .1, .2, and .3 which correspond with yours. Since I observed there was a .0008" difference betwewn a 1 and a 2 and a 3, I ASSUMED (shame on me) that there would be a .0008" difference between a 1 and a zero. so please forgive my error
------------------ T. Mark "Gunplumber" Graham gunplumber@arizonaresponsesystems.com Arizona Response Systems 5501 North 7th Avenue, Phoenix, AZ 85013 623-873-1410 http://www.arizonaresponsesystems.com [This message has been edited by gunplumber (edited February 21, 2001).]
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T. Mark Graham Master Gunsmith Arizona Response Systems, LLC |
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October 21, 2001, 12:02
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#6 |
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Administrator
Silver Contributor 
FALaholic #: 1211 Join Date: Oct 2000
Location: Virginia
Posts: 31,052
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moved to FAQ
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