102 MM stroker Vincent Picador style crank

This crank is a nice piece, but came to me with 2.5 thou runout on the timing side mainshaft and four thou runout on the drive side. After much pounding with a heavy lead mallet and up to 10 tons in the hydraulic press, it was more or less unchanged. Finally a diagonal press at 17 tons yielded a good result, had to get out the Lufkin jeweled half thou indicator to see the runout. Now running within 2 tenths Tir on timing side and six tenths Tir on the drive side.
Any adjustment from here will likely make runout increase.
Harley Tech articles list acceptable runout for their twin cam cranks as 12 thou measured with engine assembled or 5 thou on a truing stand. The Harley number seems a lot, but I feel better about this tiny amount of runout remaining.

Good to see you starting in on the Vincent monster. Looking forward to a detailed build thread.

Winter is here, perfect time to hibernate in the shop, come out in the Spring with this thing assembled and maybe a few other jobs off the list!

Glen

cleanest Lathe i've ever seen! What model/year? I have an Atlas 12x36 manufactured around 1960

1943 Monarch cy 16, about 19" swing. It is only clean because I just bought it and spent about 80 hrs degreasing 70 years accumulated grime!

Glen

A little off subject, what did you use for paint on it? I have some equipment to redo.

Carry on...

I used a hammered finish type paint called Hammerite. It is originally from the UK but now made in the US under licence. It comes in spray cans and brush on (qts and gallons) Good stuff, it has fine glass particles in it for durability.


Glen

I've used that before. Somehow I don't remember it ever looking that good.
I think the real problem is I have only found silver in the store. I'll have to look for some green or blue.

I got the grey and then added some blue pigment. They do have a bright blue but it was a bit too blue for the job, was looking for that blue gray that a lot of old machine tools were done in.
There is also a Rustoleum hammered finish available, but it is not nearly so tough as the proper Hammerite.

Glen