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Old 27 September 2006, 15:52   #11
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stainless steel drilling

Piranha drill bits for steel, multi pack about £36.00 or individuals about £6-8 each easy!!!!! (titanium tipped models only mind!)
I drilled 12 holes in a Ribcraft frame at moderate speed and required no pre hole or liquid cooling the only rule seems to be to drill at 90 degrees.

I have tried all other methods including cheaper bits and a vertical drill mount but these things made me wonder why I ever bothered doing it another way!
they are well worth the money
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Old 27 September 2006, 16:18   #12
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Quote:
Originally Posted by waverunner
When I drill stainless I always use Parafin as a lubricant and any decent sharp drill starting with a small pilot hole of about 3mm.

Trust me Parafin works. I am an Engineer and this is the recommended lubricant for this material.

Yup - also great for aluminium!!!
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Old 27 September 2006, 16:22   #13
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Quote:
Originally Posted by Biggles
I need to drill a hole in my Stainless Steel A Frame. Which drill should I be buying from the likes of B and Q to do this job quickly and efficently. Its only a small hole about 10 mm.
Seems like everytime I use one of my old drills to drill Stainless Steel I have to work real hard at it and end up with lots of small and hot shards of steel all over the place. Not too good near tubes.
Nick, if you like and can wait till after the weekend I can get you some quality drill bits from work and run them down to you on Sunday. Are you still launching from Warsash?
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Old 27 September 2006, 18:10   #14
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Try a specialist tool shop for the right bits. Pretty much everything you'll get from B&Q or the like will be a waste of time and you're likely to get mis-sold something expensive.
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Old 27 September 2006, 18:12   #15
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I've never used anything other than decent HSS bits on SS. They work a treat, provided they're sharp and as everyone says, use a very slow RPM drill.
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Old 27 September 2006, 18:28   #16
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With hand tools, I would suggest using a pilot drill of say 5 or 6mm and then 10mm one. Use plenty of coolent such as oil if you can't get proper cutting compound.
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Old 27 September 2006, 18:44   #17
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I always use a cordless drill as spins slow is lighter to hold up get in line and it tends to stall rather than break the drill bit as it breaks through . also easy to reverse after the bit breaks through and tends to jamb .

all good tips here but slow speed is the most important .
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Old 28 September 2006, 04:23   #18
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Centre punch accurately for starters.
Then a small pilot hole
Then the main hole

Use good quality HSS bits, SLOW drill speed (SS actually "work hardens"), with a decent amount of constant pressure, and plenty of cutting fluid.
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Old 28 September 2006, 14:15   #19
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Quote:
Originally Posted by Hightower
Nick, if you like and can wait till after the weekend I can get you some quality drill bits from work and run them down to you on Sunday. Are you still launching from Warsash?
Andy,

Yeh launching from Warsash on Sunday. Not too sure of the time though looking at about 1030 - 1100 hrs ish now.
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Old 28 September 2006, 15:13   #20
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You've got my phone #'s. PM sent Nick.
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