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Small brass turning

I need to make copies of a small brass knob (approx, 30 x 18)

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Ian Silver25/10/2014 17:37:04
8 forum posts
5 photos

Hi all,

I need to make copies of a small brass knob (approx, 30 x 18)

This is for an antique Ashwells toilet lock

Any advice greatly appreciated

Thanks in advance

Ian.

roy entwistle25/10/2014 19:37:14
1552 forum posts

Ian I don't know what equipment you have or how much experience but I would turn it by hand using a graver on a hand rest I can't think of an easier way but no doubt others will

Roy

Gary Wooding26/10/2014 09:47:28
996 forum posts
255 photos

A picture would help.

Ian S C26/10/2014 10:09:37
avatar
7468 forum posts
230 photos

Ian, as above.

Out of interest I had a look on Google, 1st site 2000 pounds, next few sites(E-Bay etc) 25 to 50 pounds, the last one I looked at was here in NZ wait for it-----------------$NZ 2 . 13.

I presume yours is not the penny in the slot type.

Ian S C

Ian Silver26/10/2014 12:55:10
8 forum posts
5 photos

Some pictures uploaded yes

John Haine26/10/2014 13:04:31
4718 forum posts
273 photos

I'd cnc them myself.

Did you buy that Rabone rule recently? I have always wanted a rule with that style of calibration since I read about it being developed at NPL for better legibility in New Scientist when I was at school, and that was 50 years ago!

Roderick Jenkins26/10/2014 14:48:46
avatar
2201 forum posts
616 photos

Ian,

I'd use a mixture of conventional topslide tool and parting tool to turn the major diameters and then switch to the George Thomas quick action hand rest to fill in the curves with a hand graver. The GHT graver design is reversible in its handle - one end is ground to a diamond point for convex surfaces and the other end is semi-circular for concave surfaces.

Like I used on this spinner nut:

do107.jpg

do108.jpg

HTH,

Rod

Ian Silver26/10/2014 15:06:13
8 forum posts
5 photos

Thanks for the advice everyone. I should have made my original post a bit clearer - I need someone to make them for me (I don't have a lathe and have never studies metalwork - I'm a carpenter)

So, any volunteers out there?

Cheers,

Ian.

Neil Wyatt26/10/2014 18:34:26
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Moderator
19079 forum posts
736 photos
80 articles

Ian's bolt;

Neil

Clive Hartland26/10/2014 20:42:04
avatar
2838 forum posts
40 photos

To me that looks like a brass knob turned with a hole down the center and a rivet to fix it to the slider? Maybe a lot easier to make and fix. It would have been slammed back and forth quite hard!

Clive

Ian Silver26/10/2014 22:01:09
8 forum posts
5 photos

No, it's threaded and screws into the sliding bar

IanT26/10/2014 22:20:26
2005 forum posts
212 photos

Neat looking lock though...

IanT

julian atkins26/10/2014 23:54:24
avatar
1258 forum posts
353 photos

hi ian,

happy to help and very handy with a gravel as advised by roy!

pm me?

cheers,

julian

Neil Wyatt27/10/2014 09:32:26
avatar
Moderator
19079 forum posts
736 photos
80 articles

Presumably the gear turns an indicator on the other side of the door?

Neil

Ian Silver28/10/2014 10:15:33
8 forum posts
5 photos

Yes, it has a brass bezel on the outside of the door with vacant/engaged on an enamel sign

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