Most visitors online was 1660 , on 12 Dec 2020
I seldom broach at all. I fit the new bushing on the pivot before installing, cut the hole, and pop the bushing in. Then check the pivot for fit. A 5% lean in all directions is good. Camphering the inside side of each bushing is a good idea so the pivot won’t bind on the edge.Until the pivot fits?
That’s a personal thing. New bushings come with smooth straight holes. Broaches are tapered and re-shape the hole. That’s why I try not to broach. If I broach, I burnish with a straight (not tapered) broach made of hard steel. Some people burnish all bushings.Do I also have to worry about burnishing and smoothing the inside of the bushing?
I make the bush with the hole slightly smaller than the pivot, then broach from the inside first until the pivot only just fits; obviously, that would be to tight, so I then broach from the outside so there is just enough rock.I seldom broach at all. I fit the new bushing on the pivot before installing, cut the hole, and pop the bushing in. Then check the pivot for fit. A 5% lean in all directions is good. Camphering the inside side of each bushing is a good idea so the pivot won’t bind on the edge.
Springs can look deceptively clean, even when there is a lot of crud on them. I think this is mostly because the crud gets pressed and evenly distributed when the spring is wound tight. I clean mine using Bangster’s method. Slip a Phillips screwdriver through the center of the spring, and then clamp the business end in a vise. Pour mineral spirits on a rag, and stretch the spring out, wiping with the mineral spirits rag as you go. You won’t be able to get the last couple of coils, but they are not critical anyway. After cleaning, lube with your chosen spring oil/grease while it is still in the vise, and then reinstall on the arbor. This method is easy, and has worked well for me.I am proud that I chose this clock to work on because it had multiple bad bushings and zero grooved pivot holes. Also, the brass was bright. It’s like this clock was meant for me to practice bushing. A bad example would be a clock with no bad bushings and black movement with two broken springs.
I got the entire clock cleaned haven’t deep deep cleaned the spring but I don’t think I will because it should not be bad. There was only some gunk in the center, most I got out and some minor rust on the loop part. Cleaned in ultrasonic cleaner and brushed. No kerosene.