This is episode 1 of 'At the bench'. I this episode I replace a small and eccentric pivot by drilling out with a carbide drill in the Pultra lathe. I hope you enjoy.
I'm sure the old timers would have used loctite had it been around. Old school plug has a very gentle taper and when driven onto the hole locks itself. VERY FINE TAPER!
Once again many thanks for the wonderful video I love that pivot polisher what a great idea as well as the drill guide, yep it's more fun to watch your videos than reading clock books. Jim from AUSTRALIA.
As a hobby machinist I must say I am always amazed at the tiny, sub-miniature scale in which you watchmakers work. Fun to watch and very impressive, really.
Hi Tommy, i found the easiest way was to clamp a piece of 3mm brass plate to the tool post holder, drill the hole and cup with a centre drill and follow up with a 1.5mm drill, speaking of brass plate i have some large sheets of cz120 left over from my clock making days if you or one of your friends are interested, cheers Dave
Its Always Good practice to "BORE" a thru hole for your pinion to ride in rather than Broaching it .... Your Bore will be a consistent Diameter all the way through : ) Not tapered as a broach will produce ... Cheers !
Your video content is excellent but I certainly hope that your loose sleeves never get caught up in your spinning parts as you hang your arm over the work piece. That clock gear would have sawed through your wrist artery before your bound up clothing would have stopped the spindle rotation. Not wanting to upset you by any means but you are showing people how to do lathe work and as a 72 year old retired watchmaker I have witnessed so many unfortunate lathe injuries that could (should) have been prevented with keeping safety in the forefront of the work. Best wishes to your future videos, you do good clock work.
I’m actually shocked how well that carbide insert cut brass lol, brass is a pain sometimes I normally use only HSS to cut which works fantastic but carbide is a pain with brass in my experience so bravo😊
Nice to be here in your fine makers clock shop. 3:00 minutes in is this a 3C collet you installed to hold your drill guide build? Nice working in fitting the part into the guide making for such superior stable work holding during the pinion drilling operation. Wonderful finished work, thank you for sharing it with us, Lance & Patrick.
Just a couple of things, it's not re pivoting. It never had a pivot in the first place it was made in one piece with the pinion together secondly holding the arbour like that is not recommend as you can cause damage to the pinion profile
A pivot is a short shaft or pin supporting something that turns (Collins), it does not matter how you make it the purpose remains the same, also there is no damage to the pinion profile because a gear drives via the face and not via the land.
Marchelo Marchol, Your comment is typical of many ignorant misinformed KNOW-IT-ALLS, on watch and clock forums, who think that procedures and techniques from the past are superior because they are copied from egotistical fat heads from the 14th century. Wake up jerk before you choke on your arrogance, Welding may provide superfluous strength to a watch or clock joint, but introduces stress and warpage into the parts. Modern bonding agents like Loctite provide sufficient strength to hold the parts without the warpage issues. david
