July meeting

July 5, 2018

Screw Threads

Sid Lines MBHI

Our speaker, Sid Lines, is well known to the South London Branch having given many talks to us over the years and also for running a most informative Tool Sharpening course in our workshop.

Sid, a retired mechanical engineer with an interest in clocks that started 40 plus years ago was made up to a MBHI about 11 years ago.

This talk originated from the restoration of an 1840 / 1850 bracket clock which needed special sized screws and taps to be made, this was basis of the talk, but it was expanded into the full talk which he thought would be good and interesting for all the BHI groups.

It contains some contentious points (depending on your point of view) on conservation.

The talk covers four areas:

(1) A little history (in a nut shell)
(2) The Identification of modern threads and their making
(3) Older threads and conservation
(4) Repairing methods and making old style screws.

It’s a fully practical talk.

There will be a few surprises! Sid will be bringing along a display of some odd / old thread making tools. There is something for everyone from those that are just beginning to fully experienced repairers and restorers. The talk will improve our understanding of threads etc. and hopefully provoke a little lively debate. Not to be missed!!

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