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#31
13th October 2009, 07:07 PM
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The problem with stainless is that it has a work hardened surface that you need to get under, if you let the drill run slow, this will work harden the material and the drill will burn out. What you need to do is have a sharp drill and don't be affraid to push it. Oh and use plenty of coolant
 Kind regards John
__________________
Quality parts for the Haynes Roadster - manufactured to a standard, not down to a price. Contact us at component-sales@hotmail.co.uk or visit our website www.3gecomponents.com
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#32
14th October 2009, 07:11 PM
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I must just be unlucky John,I had the lathe running fairly fast and was not frightened to push the drill hard but no luck, it was scrap studding so who knows what it was but it is hard stuff.
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#33
14th October 2009, 07:12 PM
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Cobalt is your friend
 But your wallet will hate him 
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Sean
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#35
14th October 2009, 07:40 PM
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Quote:
Better if you buy a set, but mine were still £50+ for 1-13mm in 0.5mm steps Still, they only come out the box for tough stuff I actually have a set of HSS, plus a set of Titanium coated (nicer on ally) as well. Different tools for different jobs.
__________________
Sean
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#36
14th October 2009, 07:55 PM
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we work almost only with stainless & have never had any problem drilling ,however it can happen that the drill wasnt sharp or wrong speed & the drill can burn & then what happens is that alot of the drill matirial stays in the hole & makes the steel immpossible to brill (so the inside of the hole can get as hard as the drill itself when it burns).
cheers
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