Thread: Cast steel safe
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19-01-12 08:00 PM #21
Screws
Hi Darryl
You raised a question about the screw threads.
In the early days, many screws/bolts will have been made by hand before the Whitworth thread became the norm. Have you checked to see if they are Whitworths?
Good to catch up again.
Russell
Withy Grove (Leeds) Ltd
t: 044 (0)113 2721441
www.wgsafesonline.com
Last edited by Russell Stoner; 19-01-12 at 08:01 PM. Reason: spelling
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19-01-12 11:48 PM #22
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- Join Date
- Sep 2011
- Location
- Brighton, England
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Hi Russell, Thanks for the reply. Yes I have tried Whitworth thread gauges and various others. I think as they are very rough and inconsistent they were hand cut. The long lost skill of cutting a tap's flutes with a hand file is too time consuming, so I shall clean up the threads with a needle file under an eye glass and best match them to the holes. Once they are in they won't be coming out for years to come. I visit many engineering companies and I don't think I know of any one who would know how to hand cut a thread any more, all done by pre machined taps and machines now, shame I'd love to learn. Many thanks, Darryl
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21-10-11, 10:15 PM
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