Results 1 to 3 of 3

Thread: Cetme repairs

  1. #1
    Gunco Veteran gunnysmith's Avatar
    Join Date
    Feb 2004
    Location
    Wyo
    Posts
    1,542
    Feedback Score
    6 (100%)

    Default Cetme repairs

    These are the steps I used to make the Cetme a safe shooter.
    The original bolt gap with a ground bolt was .011
    The ground bolt length was 1.8265
    New bolt length is 1.834 they seem to range from 1.834 to 1.842
    This bolt is ground .008
    The .008 is ?false gap?created by the grinding.
    Subtract that from the measured gap of .011 and the actual gap is .003
    The spec bolt gap is .004 min to .020 max.
    I remote fired this one for experimental purposes only.
    This unit would not extract, nor feed the next round when locked in a vise and fired from the remote position.
    The following checks and repairs were made:
































































    I installed +2 rollers (8.02 mm) and found the bolt gap was .005in.
    This was acceptable but I wanted more gap
    I then installed +4 rollers (8.04 mm) and got a gap of .008in
    Each + roller adds .003in to the gap
    With a go guage the gap was increased to .009in or .001in gain, well within the head space of the 7.62 X 51 cartridge.
    With the no go guage the bolt gap was .012 a gain of .003in.
    This is perfectly acceptable for the cartridge.
    The use of the gauges merely assured the repairs were within limits of the Cetme for safe shooting of the unit.
    It was test fired with 30 rounds of NATO surplus ammo from 3 different magazines with no failures.

    Changing the brake to the original Cetme








    Constitution Or Bust
    Ron Paul 2012

  2. #2
    No Hope For Me Coils's Avatar
    Join Date
    Feb 2005
    Location
    PA Where the Amish Roam Free
    Posts
    13,651
    Feedback Score
    38 (100%)

    Default

    Thanks for the info. I got one that also has a ground bolt, it does shoot well but I'll go through it and see what I come up with.
    A friend of mine got one and he made up a bolt from 3 different ones and oversized rollers to get his right.

  3. #3
    Gunco Veteran gunnysmith's Avatar
    Join Date
    Feb 2004
    Location
    Wyo
    Posts
    1,542
    Feedback Score
    6 (100%)

    Default

    here's a better view of the stock pin hole repair, the other came out too dark
    Constitution Or Bust
    Ron Paul 2012

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •