Irony
|
| posted on 3/5/11 at 02:43 PM |
|
|
Step Cone drill bits
I am thinking of getting myself a set of these. Mostly drill Ali and fibre glass I suspect. Seems to me a 3 piece set can cost from a few pounds
(yay) all the way up to £100 (boo!). Anyone use them and have buying advice?
|
|
|
|
|
ash_hammond
|
| posted on 3/5/11 at 02:46 PM |
|
|
Halfords do one. It lasted me a full build.
-- Ash
.: www.mac1motorsports.co.uk | www.m1moc.com :.
|
|
|
RichardK
|
| posted on 3/5/11 at 02:57 PM |
|
|
Aldi/Netto ones have been superb for me, in fact I bought a spare set last time they were on sale.
Cheers
Rich
Gallery updated 11/01/2011
|
|
|
whitestu
|
| posted on 3/5/11 at 03:07 PM |
|
|
quote:
Aldi/Netto ones have been superb for me,
+1
|
|
|
Madinventions
|
| posted on 3/5/11 at 03:10 PM |
|
|
I bought a couple of sets from eBay for about £15 with case etc. The first set had the flats on the shank which seemed like a good idea at the time,
but actually just snapped a couple of them when they snagged whilst drilling steel. The second set have got round shanks so they slip in the chuck
rather than snapping. For GRP and aluminium sheet, they're absolutely brilliant.
Mojo build diary: http://www.madinventions.co.uk
Solo music project: Syrrenfor http://www.reverbnation.com/syrrenfor
View my band website:
http://www.shadowlight.org.uk
http://www.eastangliankitcars.co.uk/
|
|
|
twybrow
|
| posted on 3/5/11 at 03:27 PM |
|
|
I have one of those conical sets (not stepped). It works brilliantly on wood, sheet metal, compoistes etc. Plus, without the steps, I can do whatever
size I want!
|
|
|
Daddylonglegs
|
| posted on 3/5/11 at 04:05 PM |
|
|
I bought a set of the Conical ones (3 in a box) from Screfix - £20, made of cheese! AVOID!!
Bought a stepped one from my local hardware shop (2 in a box + rotary rasp bit and countersink bit) for £15, done the job several times so far and
still seem reasonable.
JB
It looks like the Midget is winning at the moment......
|
|
|
Hellfire
|
| posted on 3/5/11 at 04:50 PM |
|
|
Is changing drill bits really too much trouble? A good set of drill bits should last forever, if treated with care. And you'll never drill a
hole 2mm larger than the one you originally wanted..... 
Phil
|
|
|
Bare
|
| posted on 3/5/11 at 04:53 PM |
|
|
Spoken like a man who has never used a step drill :-)
They work "fine' and remain centred... try that with a bigger drill.
|
|
|
rf900rush
|
| posted on 3/5/11 at 05:26 PM |
|
|
I have had one 6-20mm from RS components fo £15 and a cheap set of 3 for the same.
And yes the RS one is 3 times better.
Looks better and cuts better.
They both have there uses.
I would only use cheap ones on GRP etc.
As above, try drilling a 25mm hole in 1mm ali with a normal drill bit using a hand drill.
|
|
|
MikeRJ
|
| posted on 3/5/11 at 05:44 PM |
|
|
quote:
Originally posted by Bare
Spoken like a man who has never used a step drill :-)
They work "fine' and remain centred... try that with a bigger drill.
This is a big advantage of the cone/stepped drills, they actually produce circular holes in thin material!
|
|
|
jacko
|
| posted on 3/5/11 at 06:18 PM |
|
|
+2 for Aldi/ Lidl cheap as chips but last years i use them a lot at work on alloy and they are very good
Spray thin oil on the drill before use helps the cutting [ WD40 ]
|
|
|
Confused but excited.
|
| posted on 3/5/11 at 06:57 PM |
|
|
The Aldi/Lidl ones are brill for ali, just found out they don't like stainless. 
Actually you can drill fairly large holes in thin ali with twist drills, certainly up to half inch, you just have to know how to grind the tips for
that purpose.
Tell them about the bent treacle edges!
|
|
|
ShaunB
|
| posted on 4/5/11 at 09:35 PM |
|
|
quote:
Is changing drill bits really too much trouble?
It's a faff I could do without when making 12mm+ holes in ali sheet. But then I
am the man who has 3 angry grinders because I can't be arsed swapping between cutting, grinding and sanding discs when fabricating stuff
Shaun.
|
|
|
Volvorsport
|
| posted on 4/5/11 at 10:09 PM |
|
|
i use the aldi ones , they have worked on stainless too !!!
www.dbsmotorsport.co.uk
getting dirty under a bus
|
|
|
Confused but excited.
|
| posted on 4/5/11 at 10:12 PM |
|
|
Mine worked on stainless, but only for three holes.
Tell them about the bent treacle edges!
|
|
|
.JPG)
