Stevenson End Mill Fixture

This topic has 9 replies, 7 voices, and was last updated 5 January 2018 at 17:22 by Howard Lewis.

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1 January 2018 at 16:05 #25730
Brian H
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@brianh50089
How to set up?
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1 January 2018 at 16:05 #334789
Brian H
Participant
@brianh50089
Can anyone suggest how to set up endmills and slot drills so that the cutting edges are square to the grinding wheel?

I suppose it could be done by eye but there must be a better way.

Brian
1 January 2018 at 16:14 #334790
ASF
Participant
@asf
Use a height gauge to find height then half the diameter down. Put edge of cutter on that height. Also look at
1 January 2018 at 16:39 #334793
Neil Wyatt
Moderator
@neilwyatt
"is someone out there implying that us hobbyists are cheap bas…"
1 January 2018 at 16:46 #334796
John Haine
Participant
@johnhaine32865
From what I could work out on how he set the cutter perpendicular to one of the long edges, you could use the little optical aid that I made a while back, here shown in use setting a cutter in an "Acute" tool holder.

It's basically a rectangle or perspex bolted to the face of a short length of key steel, after having lines scribed on it at right angles to each other at appropriate places. You hold it against the end face of the cutter and align the edges of the latter to the appropriate lines. The eye is very sensitive to alignment of lines so it can be very accurate, using a magnifier if necessary.
1 January 2018 at 16:51 #334797
Brian H
Participant
@brianh50089
Posted by Neil Wyatt on 01/01/2018 16:39:57:

"is someone out there implying that us hobbyists are cheap bas…"

Surely he's right Neil, at least about some of us!

Anyway, very grateful for the suggestions, all I need to do now is try it; my Union T&C grinder is all set up with my Stevenson fixture complete with one of the ER32 collets that Santa brought, now to have a grind.

Brian
1 January 2018 at 20:46 #334822
Robbo
Participant
@robbo
Posted by Neil Wyatt on 01/01/2018 16:39:57:

"is someone out there implying that us hobbyists are cheap bas…"

All those I've met are as tight as a duck's wotsit
1 January 2018 at 21:59 #334834
Nick Hulme
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@nickhulme30114
Posted by Neil Wyatt on 01/01/2018 16:39:57:

"is someone out there implying that us hobbyists are cheap bas…"

Well maybe, but not the ones who work at 12" to the foot though
2 January 2018 at 16:56 #334959
Brian H
Participant
@brianh50089
The video was quite good but confused by the use of a high helix 3 flute cutter. It would have been much more helpful if he had stuck with the 2 flute conventional slot drill.

Even so, I've managed to sharpen a 2 flute slot drill satisfactorily, not bad for the first time.

Brian
5 January 2018 at 17:22 #335494
Howard Lewis
Participant
@howardlewis46836
"Not tight;

just careful, y'ken"

Howard
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