Doing the hole thing

**Simplicity** · 24th May 2016, 09:35 PM

On the weekend I had the pleasure of using one of these.

to cut some holes in some cypress pine 20/30 mm deep OMG.
No smoke, chips flying out like big fat pencil shaving, shavings.
I was having a ball I even drilled a couple of holes just for the shear fun of it can you believe that.
And this was done with just a cordless drill.

Compared to these ones always smoked even when used in the drill press at a medium speed.
In there pathetic defence they were cheapish set I think about $90 AU
(Maybe there's my answer)

I use to hate using them well still do.
They have never been used much so I thought they wouldn't need sharpening.
Tho maybe there not that sharp to begin with.
I had even considered putting them in my lathe and grinding the walls a little of with a diamond sharpening stone.
Because they use to jam quite a bit.
Thinking that may help.

So firstly what are the ones in the first pic called my mate told me they were Forsner bits.
But I thought the ones I had were called a Forsner bit.

So a quick search reveals there both called Forsner bits so now I'm confused.
Also tools like these I would prefer to buy in sets not just one at a time(in metric to)
Because I just like do that [emoji3].
But I cant seem to find any.
A few individual ones a round 31 mm for kitchen hinges that's it
So please help a fellow tool junkie get one more fix please.
Cheers Matt

**elanjacobs** · 24th May 2016, 09:54 PM

Forstner bits have a scoring lip that goes around the bit (like the second pic, but solid, not a sawtooth profile)
The one you used is a hinge boring bit. Carbitool have them in a few different sizes - 30-50mm in 5mm increments i think

**FenceFurniture** · 24th May 2016, 10:00 PM

Here's a Forstner bit Matt:

and this one is an HSS version with a retractable pilot drill (can be used for steeper angles):

**rwbuild** · 24th May 2016, 10:09 PM

Get a complete set of Diablo from the green shed, their fairly good quality

**Simplicity** · 24th May 2016, 10:10 PM

So there all called Forstner bits ??? Arrrr

**elanjacobs** · 24th May 2016, 11:09 PM

Kinda. The hinge boring bits are a sub-set of forstner bits

**FenceFurniture** · 24th May 2016, 11:45 PM

Originally Posted by elanjacobs

Kinda. The hinge boring bits are a sub-set of forstner bits

Yes, that's it Matt. Hinge bits are very similar but are specifically for very abrasive materials like chipboard & mdf that are probably melamine coated. Hence why they are TC tipped. That means they probably can't be sharpened to the same level as HSS or tool steel, and so won't deliver as clean a hole cut, but it's horses for courses - they are designed for kitchen cupboard doors.

A good sharp tool steel forstner produces a beautifully crisp hole in "proper" timber.

**KBs PensNmore** · 25th May 2016, 12:52 AM

Originally Posted by rwbuild

Get a complete set of Diablo from the green shed, their fairly good quality

Tried to find them at Bunnings online, Diablo are router bits from Italy

Kryn

**rwbuild** · 25th May 2016, 11:28 AM

I could stand correcting but the other day I was in Bunnings and I'm sure I saw Diablo forstner bits on the shelf. They dont always list everything they sell on their web site.

**Simplicity** · 25th May 2016, 05:13 PM

Thanks for all the great advice
I think I will just make square holes lol
No I will be looking at a few of those suggestions.
I hate my current ones.
Matt

**Jeffen** · 25th May 2016, 06:32 PM

These seem to be a similar style, no idea on quality though.

Free Shipping New 10pc 15 50mm Forstner Auger Drill Bits Set Woodworking Hole Saw Wooden Wood Cutter Drilling-in Drill Bit from Home Improvement on Aliexpress.com | Alibaba Group

Hope this helps.

Cheers, Jeff

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