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Drilling out exhaust bolts

I snapped a couple of bolts taking out the centre section and Im having a hard time drilling them out.

 

Whats the best drill bits for hardened metals ?

 

Ive got an SDS drill and cant find any suitable metal SDS bits. Do they exist?

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    Cant you grind them flush then tap them out with a punch and hammer. Thats what I have to do when I put my de cats on.

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    I snapped a couple of bolts taking out the centre section and Im having a hard time drilling them out.

     

    Whats the best drill bits for hardened metals ?

     

    Ive got an SDS drill and cant find any suitable metal SDS bits. Do they exist?

     

    buy dormer coated drill bits and run them slow with a bit of pressure behind them. most people think speed is the answer! its NOT slow and pressure will get you through and use a bit of oil to lubricate the drill bit to stop it overheating.

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    • Author

    Cheers chaps all helpful. Thanks for the oil tip been spraying water onto them and pretty pointless as just runs onto my head :no:

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    Cobalt drills, Toolstation do a set nice and cheap ;)

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