Gallery, Projects and General > The Design Shop

Coax indicator design

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winklmj:
Amazing...design to Mk1 in 6 days. I want one.

BillTodd:
Ok here's the MkII provisional design

A straight shaft should be easier to make and means the critical parts of the body, the bore and face, can be machined in one operation.

Bill

mklotz:
Bill,

Can I encourage you to provide a few measurements for your design, please?  Just the main shaft and the bronze sleeve ought to cover it.

BillTodd:

--- Quote from: mklotz on November 12, 2010, 01:07:45 PM ---Bill,

Can I encourage you to provide a few measurements for your design, please?  Just the main shaft and the bronze sleeve ought to cover it.

--- End quote ---

No problem Marv

The attached drawing are for MkI - I'm sure you can extrapolate to the MkII if you need to :)

The drawings are as designed rather than as made so, for instance,  I made the large diameter of the shaft 19mm (~3/4") because the A4 bolt I used as stock would not quite give me 20mm once surfaced. If it's easier to make the 15mm diameter = 5/8" or the 10mm = 3/8" , it won't make any difference to the function of the device.

The bearing ball I used was 5mm but  3/16" or even 1/4" would do, just adjust the holes to suit.

I machined the indicator holder to be a press fit into the side of the body - might have been better to thread it.

mklotz:
Many thanks, Bill.  I have a broken Chinese clone of a Blake that I'll cannibalize for probe and rocker.  It will be satisfying to turn the junk into a useful tool.

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