67.1mm wheel center bore tolerance for 355 wheels | FerrariChat
Buy

67.1mm wheel center bore tolerance for 355 wheels

Discussion in '348/355' started by carwhisperer, Mar 9, 2016.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. carwhisperer

    carwhisperer Formula Junior

    Sep 29, 2014
    426
    Sacramento, CA
    Full Name:
    Brian
    #1 carwhisperer, Mar 9, 2016
    I machined 15mm off the mounting surface of my rear 360 starfish wheels for my 355. I now need to redo the center bore. My understanding is that the spec is 67.1mm. Does that refer to the dimension of the hub centering ring or the bore itself? I talked to a guy today who does some custom stuff with hub centric/hub supported wheels on airplane tugs. They use a 5inch center bore. I thought he said they machine the hub ring to 4.995 and the wheel bore is 5.005. But then we discussed the clearance as being .001. However, 5.995-4.995=.010, which seems too high.

    Bottom line, does anyone know how big I should bore the center of the wheels to provide the correct tolerance for the 355 hubs?

    Probably going to use a circle program on a CNC mill, or I might use a rotary table. Any input is welcome.
     
  2. m.stojanovic

    m.stojanovic F1 Rookie
    Silver Subscribed

    Dec 22, 2011
    3,183
    Serbia - Niš
    Full Name:
    Miroljub Stojanovic
    #2 m.stojanovic, Mar 10, 2016
    The centre bore needs to be snug fit.
     
  3. Dave rocks

    Dave rocks F1 World Champ
    BANNED

    Nov 23, 2012
    16,047
    Orchard Park, NY
    Full Name:
    Dave Lelonek
    #3 Dave rocks, Mar 10, 2016
    I don't know the tolerance, maybe it's in the WSM?

    But, I measured 3 hubs and they were all very close, within .002" IIRC

    I'm dealing with this now as I'm having a set of wheels refinished and the first painter put too much material in those bores. I have a spare wheel hub that the second painter is using as a gauge to correct those bores.

    I did not measure the wheel ID but did check fit against another set and I'm guessing it's a 0.01" clearance. It's definitely not a .001" clearance.

    My suggest is you measure a hub then make a simple plug gauge to fit the bore with.
     
  4. driveitdaily

    driveitdaily Formula 3

    Jul 20, 2013
    1,041
    lake ariel pennsylva
    Full Name:
    john
    #4 driveitdaily, Mar 10, 2016

    I dont really want to start any crap , " a second painter is correcting the bores " i could say so much , but i wont . Personally , i'd just put it on the car and tighten the wheel bolts , that would correct it ,


    Sent from my iPhone using Tapatalk
     
  5. Dave rocks

    Dave rocks F1 World Champ
    BANNED

    Nov 23, 2012
    16,047
    Orchard Park, NY
    Full Name:
    Dave Lelonek
    #5 Dave rocks, Mar 10, 2016
    The first painter I used did a poor job on the metallic and had a lot of dust and crap in the finish. So, I took the wheels to another painter who reworked those issues very successfully and he is now removing the excess paint / primer from the bores and using the wheel hub I provided as a gauge. Once he gets the proper fit (via sanding the excess material), he will then dust a light coat back in that area to seal it all up.

    It's a pretty simple concept and proper plan for resolution of the issue.
     
  6. taz355

    taz355 F1 Veteran
    Owner Silver Subscribed

    Feb 18, 2008
    6,007
    Indio Ca/ Alberta
    Full Name:
    Grant
    #6 taz355, Mar 11, 2016
    Did I miss something the fix kinda seems obvious?
     
  7. cf355

    cf355 F1 Rookie

    Feb 28, 2005
    4,208
    Full Name:
    chris
    #7 cf355, Mar 12, 2016
    post pics of the finished milling
     

Share This Page