drill sharpening

drill sharpening

This topic has 7 replies, 6 voices, and was last updated 28 January 2013 at 15:08 by Old Raft.

Viewing 8 posts - 1 through 8 (of 8 total)

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11 May 2010 at 18:35 #15471
david lockwood
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@davidlockwood10028
Advert

11 May 2010 at 18:35 #51625
david lockwood
Participant
@davidlockwood10028
Hi there all i am in the process of making a drill grinding jig for my cutter grinder to grind drills by the 4 or 6 facet method as i was shown at the Harrogate show last year. the problem is i have no idea what the clearance angles should be. any advice? thanks in advance for any help

David
11 May 2010 at 21:16 #51634
Versaboss
Participant
@versaboss
Hi David,

on my Meteor drill grinding machine (for small drills, from 3 mm down) I use a primary angle between 4 and 7 deg. (4 for hard materials, 7 for soft stuff). The secondary angle is given by an end stop around 24 deg. Istr that I have seen similar values somewhere in ME (Chaddock article about drill grinding on the Quorn perhaps?), and think that a third angle would be over 40 deg. Take this with a grain of salt, maybe my memory ain’t what it once was

Hansrudolf
11 May 2010 at 22:15 #51641
Terryd
Participant
@terryd72465
I don’t know if this is any use but it may be worth a look:

Quorn

as may this place:

Colin Binnie

Regards

terry

Edited By David Clark 1 on 12/05/2010 12:14:11
12 May 2010 at 12:01 #51652
Circlip
Participant
@circlip
Luv it Terry, wish DC1 would stop modding your long

links and get the web design whiz kids to sort it

properly.

Regards Ian

7th Jan & 4th Feb 94

16th Aug & 20th Sept 96

2 sets of articles in ME by D.A.G. Brown on 4 & 6 Facet grinding

You got a PM David Lockwood

Edited By Circlip on 12/05/2010 12:15:55

Edited By Circlip on 12/05/2010 12:20:55
12 May 2010 at 12:15 #51653
David Clark 13
Participant
@davidclark13
Hi There

Links carefully modified.

regards David
12 May 2010 at 20:08 #51667
david lockwood
Participant
@davidlockwood10028
Thanks for the posts everyone. Terryd the links were very interesting
28 January 2013 at 15:08 #110319
Old Raft
Participant
@oldraft
Try http://www.gadgetbuilder.com/DrillSharp.html for "some" information.

If you find actual plans for any of the jigs mentioned please let me know.
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