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How do you drill out a bolt?

Discussion in 'Motors' started by AmDaMan, 28 Mar 2006.

  1. AmDaMan


    Joined: 18 Oct 2002

    Posts: 3,978

    Location: Wellington, NZ

    Hi, the little star screws holding my disks are not moving and the head is a bit damaged.

    How would I go about getting it out? Thanks,
  2. Firestar_3x


    Joined: 11 Mar 2005

    Posts: 30,512

    Location: Leafy Cheshire

  3. Sputnik II


    Joined: 5 Nov 2004

    Posts: 2,547

    Buy yourself a left handed HSS drill bit then using a reversable drill start drilling it and the heat of the drill and the reverse rotation will often undo it. If it doesn't then provided the drill is the correct core size for the thread in question you should be able to peel the remainder of the thread out of the hole.
  4. Glaucus

    Man of Honour

    Joined: 11 Mar 2004

    Posts: 76,645

    No easy way. if its a bolt and nut option, you just get a drill slightly larger than the diameter of the thread. Drill into the head or the nut till it falls off.
    If its a bolt into a pre threaded hole(ie in the car rather than a nut) then drill out at the same size as the diameter of the thread then get a thread maker tool, to re-do the thread.
  5. Enfield


    Joined: 8 Nov 2003

    Posts: 7,401

    Location: Hampshire

    Q: How do you drill out a bolt?
    A: With a drill :D

    sorry :p
  6. jumpy


    Joined: 6 Nov 2004

    Posts: 2,646

    Location: BOOMTIMES

    I'd try an impact driver first before attacking the wretched thing with the drill and a tap and die set...
  7. Stefn


    Joined: 18 Nov 2005

    Posts: 11

    The correct name for a 'bit' is a 'drill'.
  8. rs125


    Joined: 9 Sep 2005

    Posts: 498

    Location: Evesham

    Is this the little screw that holds the discs to the hubs?..
  9. moss


    Joined: 1 Nov 2002

    Posts: 6,487

    Location: South Shields

    Like Jumpy said, an impact driver is probably a better bet first.
  10. Trickle

    Wise Guy

    Joined: 18 Oct 2002

    Posts: 1,706

    Location: Sheffield

    Drill a pilot hole with a small bit. It must be dead centre - this is the most important and hardest to do part.

    Increase drill bit size until the drill bit is almost the diameter of the bolt.

    The bolt thread should then peal out or can be picked out.