Need O ring source

cmj · Post by **cmj** » Fri Jul 18, 2008 8:02 pm

Help, need a source for the gas cylinder O ring for the Walther CPM-1 CO2 pistol. Looks like the old (current ?) Walther part number is W9817. Larry's Guns had the gas cylinder, but no O rings.
Thanks

Ed Hall · Post by **Ed Hall** » Sat Jul 19, 2008 10:05 am

If you don't mind paying $10.00 each, you can get o-rings from Earl's Repair Service, Inc.:

Earl's Repair Service, Inc.
437R Chandler Street
Tewksbury, MA 01876
Phone 978-851-2656
Fax: 978-851-9462
Hours M-F 9:30-6:30 Eastern

I think the number they are using now is 243 79 02, but the dimensions seem a bit small for my o-ring. They say 12mm x 2mm, whereas mine seem to be 13mm x 3mm. Maybe mine have expanded some...?

Take Care,
Ed Hall
Air Force Shooting Homepage
Bullseye (and International) Competition Things

william · Post by **william** » Sat Jul 19, 2008 2:42 pm

Look up a pneumatic tool repair shop. I've had very good luck finding just about any size imaginable at relatively low cost.

Guest · Post by **Guest** » Sat Jul 19, 2008 7:39 pm

Try the importer Champions Choice

cmj · Post by **cmj** » Sat Jul 19, 2008 9:46 pm

Thanks for the replys. I think the 3mm is probably correct. I have an old one and it is also 3mm, but seems bigger than 13mm. I don't know if measure the inside, outside or inside +outside. Will try all of above suggestions. mine seems to be (green) 3mm X 14mm with a shaft size of 14.45mm

ghilt · Post by **ghilt** » Sun Jul 20, 2008 12:16 pm

Measured three of my CPM-1 cylinder O-Rings and come up with 20.0mm O.D., 14.0mm ID and a W of 3.0mm. The diagram for the CPM-1 which Walther/Earl's had posted in the past (no longer there!) listed the O-Ring, P/N 2459817 as 14X3. Go to the McMaster-Carr website and search for their P/N 9263K722. This is a black, viton material with a hardness of Shore A 75. Elsewhere on their website a discussion is made of metric O-Rings with a green color as being viton fabricated in Europe. Sure think urethane would be a more abrasive material but, can't find any metric O-Rings in urethane. Shore A of 75 is reasonably hard, probably a little softer than the OEM greenies, but for $7.06 for 10 (plus probably H & S and they may have a minimum order - shouldn't be too hard to find something else there) this will probably be a lifetime supply.
Best ever,

jmessina · Post by **jmessina** » Sun Jul 20, 2008 9:29 pm

Go to www.mcmaster.com. type in o rings for your search. They have every o ring made in their warehouse.

ghilt · Post by **ghilt** » Mon Jul 21, 2008 5:26 pm

Sorry, left out an important word --- urethane would be a more abrasive resistant material -----.[quote][/quote]

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