Register now to get rid of these ads!

57 Chevy truck brake drum & Axel "hub" diameter probs

Discussion in 'The Hokey Ass Message Board' started by grapp, Sep 19, 2013.

  1. grapp
    Joined: Aug 16, 2008
    Posts: 457

    grapp
    Member

    Hey,
    So I have a 57 Chevrolet 3100 series pickup... I am in the process of rebuilding the brake system...and kingpins, and getting her up and running. So here is the problem... I guess someone replaced an axle Both rear drums are the same, with a center hole of approx 3 1/2 inches that the drum slips over a small "hub" on the axle flange. These are 6 lug brakes. The passenger side has a small "hub" that is about 3 7/8 in diameter so the drum doesn't fit flush on the axle flange. Off course I figured this out after I had the drums cut. Problem is I can't seem to find a 6 lug 11x2 drum with a center hole large enough.. Anybody know a source for a drum that will fit this axle? and wth did the axle come out of?
     
  2. grapp
    Joined: Aug 16, 2008
    Posts: 457

    grapp
    Member

    Pictures!
     

    Attached Files:

  3. 5559
    Joined: Oct 25, 2012
    Posts: 362

    5559
    Member
    from tn

    never seen one like that.Maybe have a machine shop cut it to fit. I've had drums stick to the axle flange in the middle like that & I'v ground the hole out bigger but it looks like you have too far to go to do that
     
  4. grapp
    Joined: Aug 16, 2008
    Posts: 457

    grapp
    Member

    Well yes I have three options, find a drum that fits, enlarge hole in existing drum, or get the axle turned down, finding a drum sounds like the easiest?
     
    Register now to get rid of these ads!

  5. tb33anda3rd
    Joined: Oct 8, 2010
    Posts: 15,218

    tb33anda3rd
    ALLIANCE MEMBER
    1. Connecticut HAMB'ers

    but turning the axle solves the problem forever.
     
  6. midnight auto parts
    Joined: Feb 1, 2007
    Posts: 59

    midnight auto parts
    Member
    from tn

    wonder if that is from a gmc?
     
  7. grapp
    Joined: Aug 16, 2008
    Posts: 457

    grapp
    Member

    I have searched both GMC and Chevrolet truck drums, on like autozone website and a few others, they all claim to have the smaller center hole... finding a shop to turn it is a pia... a drum or a used axle would be easier??
     
  8. donsz
    Joined: Nov 23, 2010
    Posts: 180

    donsz
    Member

    This is a common issue with NAPCO trucks of that vintage by the way. Basically the stock drums have too small of a center opening to fit flush. Since finding a good NAPCO drum is almost impossible, most owners take a new drum (readily available) of that year and enlarge the center hole. A common way to do it is take a "right-sized" drum and clamp it to the new one (back-to-back). This provides a guide for using a die grinder to enlarge the hole. Not much enlarging is required. Works great.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.