Does anyone know what these are ?

[OSOK]

Found these in my Dad's old engineering bits but don't know what they are or were used for  ?

Greg

[David TS]

Probably gravers (engraving bits).

[1066]

I think these are handmade spade bits - as used with an Archimedes type hand drill in clockmaking. 

[Richiew]

Got some just like them in my dads old box of watch repair tools . As above drills etc for setting ruby bearings 

[OSOK]

Thank you ... Not sure why my Dad would have had anything to do with watch making though  ? ... There is one very tiny drill in one of the tubes !

[Richiew]

This might be bought as a kit as my dads gear is in exactly the same little tubes. He had it set out on individual shadow boards that all fit together wrapped in a chamois leather. Magnifying eye pieces special tweezers and tools and hand collet s to hold and spin the drill s with ie drill by hand without a hand drill . 
mill try to find it and send a pic 

[1066]

Anyone interested in these type of bits, they are explained well here. Usual practice now would be to start with a silver steel rod and, hammer one end to spread the diameter then rough file to shape, temper and finish. Used for clock plate pivots and often made by eye to fit rather than any particular size.

 

[Richiew]

Thanks 1066 , 

Much appreciated you finding the video explaining the process. Think there were a few tiny boxes of ready made brass bushings in the set too . So when clocks wore the old bushings out they would be easy to press in new correct sized ones. Brass bushings with mild steel shafts occasionally lubed with clock oil from purpose made tools just for oiling, these were long steel rods about 0.5mm by 2” long held in a jewellers screw driver type handle . Made to only put on a small amount of oil into all the nooks and crannies. 
cheers

[OSOK]

That's amazing ... Thank you for showing me

Greg