Cone step drill hole cutters

gazdkw82 · Sep 29, 2018

Looking at getting a set of cone step drill bits buts it's a mindfield. So many seem really cheap but promise the world.

All seem to be Chinese produced and labelled as titanium, is there a particular brand, variety that I should be looking at? I always prefer to buy quality for longevity.

Pete999 · Sep 29, 2018

RS do a very good set, had mine for about 10 years

Dillb · Sep 29, 2018

You looking at using them to drill metal or plastic?

Andy5678 · Sep 29, 2018

I have had the same ones for about 13 years. Think they were from RS components. Served me well and hopefully will for more years.

Flanders · Sep 29, 2018

Ive just got a no make set , just use them for drill plastic though i always use hole cuters for metal

gazdkw82 · Sep 29, 2018

Dillb said:
You looking at using them to drill metal or plastic?

Probably both but more on metal than plastic

Leesparkykent · Sep 29, 2018

Cheap ones are fine for plastic but they don’t last long on metal. Always handy to have though to enlarge holes in trunking etc. For the bog standard size holes in metal I.e. 20mm, 25mm and 32mm I use the armed acceler8 holesaws.

Marvo · Sep 29, 2018

Good cone cutters are helluva expensive and I much prefer the proper hole saws.

PEG · Sep 30, 2018

Get a quality brand,if choosing a cone type cutter,and save it's life,by changing down speeds,as you step up the size increments.
You can re-sharpen them,but it takes a bit of micro-carbide trickery

Pete999 · Sep 30, 2018

PEG said:
Get a quality brand,if choosing a cone type cutter,and save it's life,by changing down speeds,as you step up the size increments.
You can re-sharpen them,but it takes a bit of micro-carbide trickery

Agree but for a neater job I prefer these.
Q-Max Sheet Metal Cutter / Hole Punch 20Mm Diameter Round | eBay - https://www.ebay.co.uk/itm/Q-Max-Sheet-Metal-Cutter-Hole-Punch-20Mm-Diameter-Round/112730755413?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D20151005190540%26meid%3De4db0c0dc22c4347803142e7fa0e733b%26pid%3D100505%26rk%3D1%26rkt%3D1%26%26itm%3D112730755413&_trksid=p2045573.c100505.m3226

gazdkw82 · Sep 30, 2018

I will get a decent hole saw set (probably the armeg sheet metal ones) however if I need to step up or a size that's not in the armeg set I'll need a cone drill

telectrix · Sep 30, 2018

these are the dogs nuts if drilling into trunking with live cables inside. the stop ridge saves a lot of aggro and blue flashes.
Armeg Acceler8 Holesaw 25mm - https://www.axminster.co.uk/armeg-acceler8-holesaw-25mm-504772?gclid=Cj0KCQjw6MHdBRCtARIsAEigMxG4rtDE5COq01AY2MY265C8qUoCr7u99VQ-Lpe_njfWb1WRfXj8g64aAmAzEALw_wcB

Rpa07 · Sep 30, 2018

I always get mine from Aldi, for enlarging holes they do the job.
They are also cheap enough to not worry if they blunt a bit.
If the pilot is blunt I’ll pilot with another drill bit and enlarge with the hole cutter. It may waste 45 seconds of my day but I make that up by not chewing my food!