Click here to sign up  Click here to go to the galleries  Click here to go to the code of conduct  Click here to go to the video page  Click here to go to the SW Meets page
Results 1 to 5 of 5

Thread: Drum brake retaining screw - thread size?

  1. #1 Drum brake retaining screw - thread size? 
    club member Club Member
    Join Date
    Feb 2020
    Location
    Bedfordshire
    Posts
    148
    Does anyone know the thread size for the drum brake retaining screws?
    Somewhere in the back of my mind I have a feeling it is something odd like a BA thread....

    Cheers, Robin
    Reply With Quote  
     

  2. #2 Re: Drum brake retaining screw - thread size? 
    club member Club Member dcunn's Avatar
    Join Date
    Nov 2011
    Posts
    1,721
    Reply With Quote  
     

  3. #3 Re: Drum brake retaining screw - thread size? 
    club member Club Member kahawi's Avatar
    Join Date
    Jan 2018
    Location
    Bideford, Devon, UK
    Posts
    106
    With four, or five ½” high-tensile studs and nuts holding the wheel to the drum and the drum to the hub, does anyone know what purpose these tiny screws actually serve?

    Colin B
    Marlin Hunter R500 ULA 1997 Ford-Based Hunter with 2.3 DOHC L4 engine, chassis/kit No. 157
    Reply With Quote  
     

  4. #4 Re: Drum brake retaining screw - thread size? 
    club member Club Member stevejgreen's Avatar
    Join Date
    Nov 2011
    Location
    Somewhere in the world
    Posts
    3,432
    Quote Originally Posted by kahawi View Post
    With four, or five ½” high-tensile studs and nuts holding the wheel to the drum and the drum to the hub, does anyone know what purpose these tiny screws actually serve?

    Colin B
    Useful during maintenance of brakes before the wheels are bolted on.


    BEWARE

    Standard countersunk screws have deeper heads than the proper ones from Rimmer Bros meaning that whilst wheelnuts are torqued up evenly, the head of the screw can act as a pivot point. Not too bad with steel wheels but with alloys the head will force itself into the alloy and can easy lead to a loose wheel and broken studs.

    Ask me how I know?
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
    Reply With Quote  
     

  5. #5 Re: Drum brake retaining screw - thread size? 
    club member Club Member
    Join Date
    Feb 2020
    Location
    Bedfordshire
    Posts
    148
    OK - thanks guys.
    FYI the thread size is 1/4" UNF. But if they have special "lower" heads maybe I'll have to bite the bullit and get some from Rimmer Bros.

    Cheers, Robin
    Reply With Quote  
     

Bookmarks

Posting Permissions

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