Author Topic: One screw clamp  (Read 1095 times)

Offline sbwhart

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One screw clamp
« on: February 13, 2018, 06:56:40 AM »
Another handy bit of kit I found in an old copy of American machinist magazine,

A one screw clamp, again it can be used with just one hand so that its less fiddly to use than a two screw toolmakers clamp.







Stew
A little bit of clearance never got in the way

Offline bent

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Re: One screw clamp
« Reply #1 on: February 13, 2018, 08:39:19 PM »
Can never have too many clamps. ;)

Offline sbwhart

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Re: One screw clamp
« Reply #2 on: February 14, 2018, 06:50:06 AM »
Can never have too many clamps. ;)

I'd agree with that.

Drawings are attached.

Stew
A little bit of clearance never got in the way

Offline Lew Hartswick

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Re: One screw clamp
« Reply #3 on: February 16, 2018, 08:48:43 PM »
Drawings are attached.

Stew
Decided to do one of these clamps before the depth "transfer" tool.  It really is a transfer deice like a telescope gauge or a small hole gauge.
 So first thing to do was see what UNC / UNF screws are close and then what Murican steel can be "close enough". :-)
 settled on 2 -56,  4 -40  nd 1/4 - 28 screws, and 1/2 x 1/2 for the jaws, and 1/2 (trimed a bit) x some gauge or other that is about .110 tck.)
So got those parts roughed out. No school Mon so it'll be Tue before I can do any more.  I'll keep you posted and a pix or two later.  If anyone
wants the US equivalent dwgs when finished I'll be happy to supply.   :-)  If it really works. :-)
   ...lew...   

Offline sbwhart

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Re: One screw clamp
« Reply #4 on: February 17, 2018, 07:49:01 AM »
Hi Lew interested to see your progress.

One of the guys at the club who's a semi retired clock maker made one with a slight modification he extended the length of part 5 Bottom Jaw so that he could grip the extension in the bench vice and grip small clock parts with the clamp.


Stew
A little bit of clearance never got in the way

Offline Lew Hartswick

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Re: One screw clamp
« Reply #5 on: February 21, 2018, 09:37:22 PM »
Progress:  Got the jaws made and the X parts but may have to re do them.  Changed the screw to 1/4-20, the 28 tpi may make the adjustment too slow.  Am having a bit of re-design problem with the clip that lets the screw back up the jaws. :-)  More work tomorrow as
there is only one class , first one in the morning, so have the rest to play. :-)
   ...lew...

Offline Lew Hartswick

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Re: One screw clamp
« Reply #6 on: February 25, 2018, 07:52:35 PM »
A brief follow-up. :-)


more later.
   ...lew...