1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

WTB: Drilled front disc rotor in good condition.

Discussion in 'Wanted' started by Jdub, Aug 15, 2019 at 1:42 PM.

  1. Jdub

    Jdub

    Joined:
    Dec 1, 2018
    Hi all - looking for a front disc rotor, drilled, in good shape runout-wise, but can be tarnished, etc. as I can finish it up in appearance.
     
  2. Lineslinger

    Lineslinger VIP MEMBER

    Joined:
    Feb 26, 2017
    This, not drilled

    L1150483.JPG
     
  3. marshg246

    marshg246 VIP MEMBER

    Joined:
    Jul 12, 2015
    Check here: https://truedisk.net/

    They have trued several rotors for me and always do an excellent job. They also drill rotors.
     
  4. Richard Tool

    Richard Tool

    Joined:
    Aug 3, 2019
    I have two of these I drilled myself and Truedisk Blanchard ground them for me and they indeed do a very nice job . I want to keep them so I have a spare but I have the drawings for the holes and can get them to you if you want to drill them yourself. I will have to mail hard copy to you as my scanner is down.
    Also, Old Brits used to do these on an exchange basis and had to have a minimum ( 6 perhaps ? ) but they would take your name and call you when they had enough orders . I understand they have slowed their business down a bit so I don't know if they still offer them.

    LMK if you would like the drawings - having Truedisk drill them is probably a good thing -I don't know if they have their own pattern or do it to yours.

    Cheers -RT[​IMG]
     
  5. olympus

    olympus

    Joined:
    Aug 5, 2017
    It doesn't look like the holes have been countersunk??
     
    Craig likes this.
  6. Richard Tool

    Richard Tool

    Joined:
    Aug 3, 2019
    This one is unfinished- the holes on my completed rotor are chamfered lightly both sides - why would they be countersunk ?
     
  7. Tornado

    Tornado VIP MEMBER

    Joined:
    Dec 5, 2017
  8. Craig

    Craig VIP MEMBER

    Joined:
    Dec 20, 2005
    Think that what Olympus was meaning, also the drilled holes champhers rounded on edges , “sinusoidial” maybe the word .... ?
     
  9. Richard Tool

    Richard Tool

    Joined:
    Aug 3, 2019
  10. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    #4 involved a mill & rotary table I believe...at least the surfacing marks give adequate suggestion to support this. One never knows for sure with all of this CNC, which I never learned to operate....Hell! I've never be around the stuff.
     
  11. Richard Tool

    Richard Tool

    Joined:
    Aug 3, 2019
    The marks are from the Blanchard grinder - a large surface grinder that has multiple heads and each head has multiple smaller heads that contain the stones themselves . I believe all rotate in opposing directions. I don’t recall the exact specs but this machine is capable of grinding a 6 foot square piece of steel plate flat within insane tolerance. When grinding is complete with both surfaces true and parallel the mounting face at the hub is then trued parallel to the braking surfaces - very important as these are not floating rotors.

    While I have a rotary table it wasn’t necessary for drilling the rotors. I turned a base that fit the center mounting hole of the rotor and made pointer to index the divisions around the rim which were established simply with dividers .

    I did mine on the mill but a drill press is more than adequate.
    A table with a lead screw device to advance the work in x or y axis
    would make things easier but with patience it can be done without.
     
  12. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    PM...Pure Magic.
     
  13. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    Disc Brake Reconditioners did 20+ discs for me. All were Blanchard ground, most were drilled to one of their typical patterns (very similar to the one RT posted), and 3 were drilled to my custom pattern.
     

Share This Page