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Drilling stainless ??

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Tommo:
mmm, carbide but you are talking big bucks.

it should drill fine if it isnt too bigger hole, its not that bad. just blunts your drill quicker but for gods sake dont let the stainless get very hot, thats when the problems occur.

piggysteve:
Andy, normal hss drill bit, plenty of lubrication but pulse the trigger of your drill.

Steve

andrew2986:
thanks guys, will give it another go over the weekend

Andy

marjan:

--- Quote from: piggysteve on May 29, 2008, 19:13:26 ---Andy, normal hss drill bit, plenty of lubrication but pulse the trigger of your drill.

Steve

--- End quote ---

Yep that's the way I do it and keep dipping the drill bit in oil.

lee celtic:
Don't go up in sizes this will heat the steel around the first hole making it super hard for the second drill [-X

If you don't want to shell out for an expensive drill bit there is a cheat I have used a few times and it does work...But don't tell anyone as I work in an engineering company and if they find out they'll laugh at me..... :-$

Get an old masonry bit and grind it to the same angles as a steel hss bit (think its 118 degrees) drill at med speed with coolant of any kind and go straight through in one go or the steel will harden again.. trust me it works  :D

also good for drilling out bleed nipples in calipers (or so I've heard ;))

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