Synchronome Slave pawl

[Peter BellParticipant @peterbell11509]

Hello,

I need to make a new gathering pawl for a Synchronome slave movement. The pawl is about 12mm x 5mm and 2.8mm thick and appears to be white nylon. The dial is 600mm dia which is probably why its worn, it only dates from 1981.

My natural instinct is to make one from brass however probably wiser to stick with something like the original.

Not really familiar with plastics, can anyone suggest a suitable material ?

Thanks Peter

[Peter BellParticipant @peterbell11509]

[Michael GilliganParticipant @michaelgilligan61133]

Peter,

I would recommend using PEEK [polyether ethyl ketone, If I recall correctly].

It has excellent bearing qualities, machines beautifully, and is much more stable than Nylon.

… Rather expensive as a stock material, but an ebay seller often has offcuts.

MichaelG.

 

Edited By Michael Gilligan on 05/03/2014 17:12:03

[Old SchoolParticipant @oldschool]

Peter

Tufnol sheet should do the job readily available

Oliver

[Michael GilliganParticipant @michaelgilligan61133]

Peter,

Could you please post a picture of that Slave Movement

… I'm rather surprised by the date you mention.

Many thanks

MichaelG.

.

P.S … This excellent document seems to confirm the use of Nylon Pawls from 1963 onward, and also indicates that yours might be one of the last made … see p154.

Edited By Michael Gilligan on 05/03/2014 18:07:48

[Peter BellParticipant @peterbell11509]

Michael,

Yes will post some pics but it will be possibly Friday, not near it at the moment but looked at it earlier and its ink stamped 17th Jul 1981 or pehaps that was when it was installed or a specilal large replacement.

Saw that doc previously—excellent work,

Thanks Peter

[Michael GilliganParticipant @michaelgilligan61133]

Thanks, Peter

Much appeciated.

MichaelG

[frank brownParticipant @frankbrown22225]

The document brought back memories. We had a Synchronome clock at work. I vaguely remember some one fiddling with it in about 1971, it was never touched until I left in 1980. the one second pulses timed our control room digital clock.

Frank

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