Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Wed Nov 20, 2019 7:30 am

All times are UTC - 5 hours


The Canadian Airgun Forums are a place for people to discuss and learn about airguns and the airgunning sport in Canada. There are lots of discussions about airguns, airgun accessories, reviews, modification and repair information, airgun events, field target and free classifieds!

 

You need to register before you can post: click the register link to proceed. Before you register, please read the forum rules. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own pictures, and access many other special features. Registration is fast, simple, and absolutely free! To start viewing messages, select the forum that you want to visit from the selection below.








Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Thu Jan 15, 2015 10:47 pm 
Offline

Joined: Sat Jan 03, 2015 12:20 am
Posts: 28
Does anyone know where I can find the actual i.d. o.d. and thickness that these things should be so I can make them out of brass... Considering using oil lite washers.

_________________
Paulo


Top
 Profile  
 
PostPosted: Fri Jan 16, 2015 4:47 am 
Offline

Joined: Sat Jan 25, 2014 9:16 pm
Posts: 1271
Location: United States
You mean the barrel pivot washers on each side. Brass is what most people use, but steel works too. Get some 5/16" SAE brass washers that are supposed to be .0625" thick, but often vary, and often thinner which was no doubt to save a buck. The problem is the guns usually need that or thicker. So get some, then grind the OD down to ~.700, slightly bevel the face edge for install, and check fit. If all is perfect it will fit in the gun very snug so the bolt is really just there to hold it together, not put pressure on them. If the washers are too fat then you sand until perfect. If too loose then you can either shim one or both, or find thicker washers. Both the gun and typically the washers are made in china or similar which is why all dimensions vary so much.
Also, the barrel block side is very rough so you don't want the new softer washer getting ground down on that. You can epoxy the washers, pin them, or whatever.


Top
 Profile  
 
PostPosted: Sat Jan 17, 2015 6:57 pm 
Offline

Joined: Sat Jan 25, 2014 9:16 pm
Posts: 1271
Location: United States
Almost forgot, the receiver side, or ears or forks of a typical airgun is also rough. You'll want to sand those smooth so it doesn't tear up the softer washer. Often the machine marks are deep, but that's ok, as long as the surface the washer contacts is smooth. I use a Ruby nail file, or Revlon ceramic nail file to smooth those because it's an excellent tool for this kind of work, then I follow by wrapping the file with fine sandpaper. You can do the same by wrapping sandpaper around a flat file or other misc flat object.
I also smooth the breech which is also typically too rough and odds are good the seal isn't sealing perfectly. Most Crosman guns use a rather stiff breech seal, so imo it's best to sand the breech smooth and replace the seal at the same time so it can mate against the new surface.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO