Buy the Hemingway Tool Grinder kit, it iis very good for milling cutters and lathe tools.

Or look at the Acute grinder from Eccentric Engineering, follow their link from this page, I think you can get a kit of materials or just the plans. Took me a few weeks from their kit, see my build thread here.

http://www.model-engineer.co.uk/forums/postings.asp?th=111882&p=1

Edited By John Haine on 22/04/2016 22:20:54

Harold Hall's book "Tool and Cutter Sharpening" (Workshop Practice Series) has all the drawings and instructions to make a very simple set up to sharpen drills and cutters on a common bench grinder.

If you want something a bit more like a professional Clarkson or Deckel type unit, google "Stent tool and cutter grinder". Not sure where the plans for that one are available.

I made one of these It is simple but effective. It can do drills including four facet, end mills (sides as well as ends), slitting saws, etc.

Russell.

The Brookes T&C grinder design published in MEW April/May and June/July 1993 uses no castings and is said to be a strightforward build. As described it has no drill sharpening facilities but a four facet style using interlocking toast rack V-blocks to hold the drill looks easy enough to add. For a conical point one of the swing designs could be set up. These work well if the geometry is correct.

My main beef with all published designs is the assumption that infinite angle adjustment is both desirable and essential. Realistically the ordinary worker needs very few angles, almost certainly less than 10, so infinite adjustablitily just makes more work and opens up the probability of errors. A few fixed angles also has the advantage that the tool works just the same after each re-sharpening whereas successive nearly the same means you may have to keep re-learning how to get the best out of it. Really sharp but maybe not quite optimum angle always beats book angle but such a pain to regrind that it has to be really blunt before it comes out!

Somewhere in my pile of abandoned back of envelope sketches is a basic layout for a system using stacked pivoting blocks and various sized pins to set the angles. Never really went anywhere because I couldn't see a decent way of doing repeatable and accurate nose radii on lathe. Then I got a Clarkson. Angle templates are theoretically good but no substitute for rapid locking to fixed values. My design also took a fixed grind at each tool sweep so you knew eaxaclty what was happening.

Clive.

There was one in ME back in the 90s that was made mainly from old door hinges.

Ian S C

Mine is very much a scrap creation Works a lot like Stewart's , I guess.

More pictures HERE

Has vernier angle setting (I always judge by eye), could do with covers for the guides and the endmill holder takes ER collets (without the flange, hand tight is plenty for light grinding).

When you look at the site Steve has bought up, have a look at the other tools too, I like the shaper, and I like the idea that they have of putting a hole through the headstock of the machine to take long things.

Ian S C

if you can cope with German then http://www.metallmodellbau.de/MINI_BONELLE_II.php covers the updated Bonelle with true Teutonic completeness

(sorry for the improper link but getting back here after the login page is a pain enough!)