Countersink bits

[Lurker]

Apologies in advance for using the ultimate swear word……..

Has anyone ever sharpened these?
And how?
I have a pile in a tin that being a tight @£se I can’t bring myself to chuck away.

Also any recommendations for replacements

 

[Mike G]

I'm glad you asked, Jim. I need to know too. I've got 7 or 8.......but only one useable one now. I'm sure a minute with a diamond file will get some of them going again, but unfortunately, diamond files don't have an edge thickness tapering to near-zero to deal with the pointy end.

 

[Doug]

I’ve found a set of jewellers diamond files work well on mine but I guess it depends on what style of countersink bits you have

 

[Cabinetman]

I must be unusual – I throw mine away and get a new one! But it’s nearing the end of its life and I was doing some fairly rough work with it the other day and realised that I could get it to cut so much more effectively by putting my ordinary rechargeable drill into hammer drill mode.
Interestingly I forgot to turn it back to ordinary mode when I was putting the screws in and it worked a bit like an impact drill, something I’ve never bothered with but have used once. Ian

 

[9fingers]

I like the “hole through a cone type” no tendency to chatter and dead easy to touch up

I’m sure they have a better name but too busy to look up until this evening is any one does not recognise the description. I think ali express and Banggood do them reasonably priced

Bob

 

[9fingers]

Here is my set



Bob

 

[AJB Temple]

Mine are similar to Bob's. In my case made by Fische. Example pair here https://www.amazon.co.uk/FISCH-Premium- ... 1939186031

I got tired of the cheap conventional type blunting in next to no time and also giving a rough finish. These deburring tools work in metal and they make light work of hardwood and give an excellent finish. I've never had to resharpen mine, but if I did it would be dead easy.

 

[Cabinetman]

Snail bits. Ian

 

[9fingers]

Snail bits. Ian

Thats the one! Thanks Ian

Bob

 

[RogerS]

Snail bits. Ian

Thats the one! Thanks Ian

Bob

Ha! I should have had the courage of my convictions. I posted 'snail bits' but then looked at Ax's site and nothing came up and so I chickened out and deleted it :lol:

 

[droogs]

If you have the fluted type then any small diamond file will do it, if you have a snails tail like above then you want conical slip stones like thes

https://www.buybrandtools.com/acatalog/ ... _DCKF.html

 

[Lons]

You can sharpen them with small pointed diamond bits in a dremel but need steady hands, I've managed mine a few times but eventually they're past saving. The only pointed type I have are cheapos and the diamond coating doesn't last but are ok, I got my last lot from Aldi I think. The kit sold for chainsaw sharpening works on snail type bits

 

[AndyT]

This is also known as a snail bit




and here I am successfully sharpening one with a little conical stone in a mini drill


They work very nicely, in my experience.

 

[RogerS]

If you have the fluted type then any small diamond file will do it, if you have a snails tail like above then you want conical slip stones like thes

https://www.buybrandtools.com/acatalog/ ... _DCKF.html

How much ?

Just think about (a) how many new ones you could buy and (b) how much time you'd save by doing that ...

 

[SamQ aka Ah! Q!]

Home Metal Shop Club Newsletter - V.17 No.8 August 2012 -

Zero Flute Countersink & Chamfering Bits
By Dick Kostelnicek

Complicated if you are not a metalworker, but there are useful nuggets in this article.

Mod Edit: Link here
http://www.google.co.uk/url?esrc=s&q=&r ... mVDptui29p
Bob

 

[droogs]

If you have the fluted type then any small diamond file will do it, if you have a snails tail like above then you want conical slip stones like thes

https://www.buybrandtools.com/acatalog/ ... _DCKF.html

How much ?

Just think about (a) how many new ones you could buy and (b) how much time you'd save by doing that ...

:lol:

Not saying buy these ones specifically but to give you an idea of the type of thing you need. I have 2 a big one and a small one and they cost me £25 in total 20 years ago.

 

[SamQ aka Ah! Q!]

Mod Edit: Link here
http://www.google.co.uk/url?esrc=s&q=&r ... mVDptui29p
Bob

Thanks Bob. I should have thought to seek a direct link.