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Quick Acting Knob Question

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Jon Gibbs05/04/2014 11:27:50
739 forum posts

I'd quite like to make a quick-acting knob for the depth stop on my drill-press like the one below. The current nut is an M10 Fine which is a bit of a nuisance to set and slow to adjust - and this seems a neat idea which I saw as a suggested mod for a milling machine.

Has anyone made one of these and would offer any advice on the best way and pitfalls please? The suggested angle for the through-hole is 12 degrees.

I'm thinking of drilling and tapping the M10 fine threaded through hole first followed by milling out a 10mm hole at an angle with a centre-cutting end mill. Any other tips I might find useful please?

Many thanks

Jon

Edited By Jon Gibbs on 05/04/2014 11:29:09

Brian Wood05/04/2014 11:41:08
2202 forum posts
37 photos

Hello Jon,

Look back in MEW 212 for Gary Wooding's article on the Centec mill modification, he has a drawing for a jig to make two off tilt nuts on the same lines you are thinking of. The angles he used aren't quite as big as yours but it is all related to the bore size.

Regards Brian

Jon Gibbs05/04/2014 12:05:38
739 forum posts

Thank you for the pointer Brian.

Unfortunately, I have to admit that I'm not a subscriber of MEW blush

Michael Gilligan05/04/2014 12:25:59
avatar
15853 forum posts
693 photos

Jon,

If I recall correctly, you only need a comparatively shallow angle

... see here for a commercial version.

I thought that WDS stocked them, but can't see them listed.

MichaelG.

John Stevenson05/04/2014 12:28:34
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Moderator
5068 forum posts
3 photos

WDS used to stock them, bought loads, but like all WDS's stuff it's not cheap.

Keith Long05/04/2014 13:00:06
836 forum posts
11 photos

WDS still do stock them, and quick release "thumb nuts" in M10, but Berger Tools **LINK** are worth looking at as well.

WDS look to be cast iron whereas Berger do moulded plastic with an insert at a much more friendly price. However you say that the thread you've got is M10 FINE, I think the standard knobs come with M10 coarse, but could be worth checking.

Gary Wooding05/04/2014 13:00:33
729 forum posts
192 photos

I've created a PDF of the section of the article that tells how I made the tilt nuts **HERE**

I hope this answers your query.

 

Gary

Edited By Gary Wooding on 05/04/2014 13:01:23

Jon Gibbs05/04/2014 13:29:14
739 forum posts

Thank you so much everyone for the useful information and especially to Gary for providing the pdf of the MEW article.

I'll have a go when I get chance.

Many thanks again

Jon

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