Rear drive shim numbers?

Discussion in 'Airheads' started by Plaka, Apr 20, 2013.

  1. Plaka

    Plaka Brevis illi vita est

    Joined:
    Jun 19, 2010
    Oddometer:
    4,629
    I looked up the part number of a /7 rear drive outer (cover) shim:

    <table id="splines" cellpadding="0" cellspacing="0" height="58" width="726"><tbody><tr class="odd"><td>
    </td> <td>33 12 1230535</td> <td> Shim
    </td> <td>90X99,8X0,180MM

    </td></tr></tbody></table>

    But I don't get how you tell how thick it is???? Is this one of those deals where a comma is used in place of a decimal point?

    so 90 x 99.8 x 0.180mm
    #1
  2. R-dubb

    R-dubb Dubbious Adventurer

    Joined:
    Aug 4, 2001
    Oddometer:
    5,306
    Location:
    San Francisco
    The numbers are sequencial, I believe in 0.05 MM steps. Most of the drives I've messed with have one shim slightly larger to get close, then as many of the 0.20 MM rings as it takes to make up the rest. You can stack in any increment.

    Although, as I look at the /7 part numbers they don't seem to have any real thin ones. That would mean making an exact measurement before buying, which is harder. I prefer to test various sizes until I get a zero free play condition, then add for preload.

    The numbers I see listed dont match yours either. Ending in 230 717 = 1.50MM. Next number up = 1.55 and so on up to 2.50MM
    #2
  3. Warin

    Warin Retired

    Joined:
    Aug 30, 2012
    Oddometer:
    3,999
    Quite probable. Europeans go in for commas instead of a decimal point, makes .csv files go funny. :lol3
    #3