Recommendation for Tool and Cutter Grinder

[Ian ParkinParticipant @ianparkin39383]

+1 for me too

[David George 1Participant @davidgeorge1]

Hi all the grinder is a Newing-Hall pantograph engraver grinder and it had a wrecked diamond wheel (great chunk out of it). It was on EBay for £9.00 and I won it for £26.00 and could collect and pay cash. Bought a new wheel and made a proper rest and bobs your Aunty.

David

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for the clarification, David

… That explains the 'seemingly impossible'

MichaelG.

[Neil LickfoldParticipant @neillickfold44316]

Wire edm is the better process to make small tools from hss or carbide. Yes you can grind such a tool on your tool and cutter grinder. But asking how long it will take, is very difficult to answer. The grade of hss steel, the type of wheels you are intending to use, the type of cooling you are using etc etc. From 40 mins to several hours will be a ball park time figure. The other issue is the precision required of the tool dimensions as well.

Neil

[BazParticipant @baz89810]

Neil I agree wire edm is a better process for making small tools, an optical profile grinder would also be a better process but how many model engineers have access to such equipment, I suppose we all do via a local engineering company, but at what cost, assuming they can be bothered with some old codger and his fag packet sketches. I feel that the average model engineer is better to stick with equipment such as the worden, quorn, Clarkson and the various designs of grinding rests. A relative newcomer is the acute sharpener from eccentric engineering, this system allows the tool it to be advanced into the wheel against stops, something grinders like the Clarkson lack.

[JasonBModerator @jasonb]

Further to my suggestion of a carbide Mini-thin grooving insert I see that you can also get a 0.015" HSS insert which is rather close to 0.35mm, just stone the corner off that.

[Steve King 5Participant @steveking5]

Read a thread on here recently about someone turning their lathe into a grinding machine not really recommended due to all the dust contamination but if cleaned down properly I can't see any issue sorry don't have a link

[Howard LewisParticipant @howardlewis46836]

A parting tool only 0.35mm (0.00138" for fellow Luddites ) wide is going to be very fragile. Even a hacksaw blade is likely to be thicker, and probably less likely to fracture.

Is it impossible to countersink, or counterbore the hole? That would be easier and less prone to dramatic events likely to scrap the workpiece. You would miss out on all the practice of tool grinding though!

Howard

[David Davies 8Participant @daviddavies8]

I'm a Luddite as well but i believe 0.35 mm is about 14 thou or 0.0138".

Sorry to be a pedant.

Dave

[Howard LewisParticipant @howardlewis46836]

Quite right David. This new Wi Fi keyboard seems to like duplicating characters when I'm not looking!

But we couldn't have such interesting and informative discussions with goose quill and ink!

Howard

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