Cutting discs and cone drill set....handy.

hako · Guru

Cutting discs and cone drill set....handy.

DeBe · Guru

Thanks for that Hako. Il order the cutting disks. How good are the steped cone drills? are they ok in thin steel like car bodies?

hako · Guru

I'll report back on the stepped drills - only tried in aluminium but later tonight I'll go up the shed and try them in steel both car body thickness and tank washer thickness (remember them!)

D and D · Guru

The stepped cone drills are intended for thin sheet steel like roofing panels or corrugated steel. I don't know how they'd go on thicker stuff. They also work well on softer stuff like plasterboard. You can buy them online or though most hardware shops like Bunnings or specialty tool shops.

Regards

Dave

hako · Guru

Tried the larger stepped drill - the one that starts at 1/4" and finishes at 3/4" - used a piece of 2mm steel channel for the test. Initial 1/4" hole was a bit slow compared to a normal drill but once that hole was through the drill went from step to step as fast as I was prepared to push the drill right up to 3/4" with no wobble or jagging so I was very happy with that. Checked the cutting edges with an loupe and the all appeared sharp with no chipping or burring so they are made of decent steel. I note that Bunning sell a similar drill to this one at $48...that's for 1 drill, not 3 and it's also made in China. Profit must be good if you can buy from Ebay for $2.70 each yet at the hardware shop they cost 18 times as much! Didn't both on body metal as if they go thru 2mm steel, thinner metal will a cinch.
Re the discs - tried one on a 1/4" HSS drill and it cut thru the shank in about 45 seconds. After that there was still carbide (or whatever is the cutting medium is) on the disc surface and this is still the original disc (9 left).
Makes you aware of just how easy it is to overcome security devices like chains or padlocks.
Did I hear someone say "you get what you pay for"?

Good Luck.

03_Troopy · Guru

I used to use the step drills a lot in ally and plastic, building truck bodies. They were even good up to about 3 mm steel if you used cutting compound and kept them cool. But there a lot of different types. Single straight flute, single helical flute and dual helical flute. The dual helical were the best for smooth cutting without binding or vibrations. Lots of different brands of varying qualities too.

DeBe · Guru

Thanks Hako il get them to at that price.

Gaz n Shell · Senior Member

Those step drills are a top little weapon Hako,I got a set from Aldi a while back and forgot I had em,just used them for a little job on the cruiser.
Thanks for remindin me or they'd have stayed in the shed .
cheers

see ya in the bush

Gaz n Shell