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Does anyone on the forum know the Earls methos of making piston rings/
Thanks
Ron
Thanks
Ron
Piston rings
- Thread starter gilbycoath
- Start date
Help Support Home Model Engine Machinist Forum:
Earl Who? Where did you hear about this?
hawkeye1101
Member
I'm not familiar with Earl or his method, but I make my own piston rings if you are interested in that.
hawkeye1101
Member
Sure, Here is an example.
For a bore size of 1.35" we want an uncompressed gap of about .140". (scale that proportionally to whatever bore size you are working with)
Find the circumference of 1.35= 4.241" +.140" gap which is 4.381". Convert to diameter =1.395. This is the od to turn the ring to.
Bore the center, assuming a .060 ring = 1.275 ID. part off at whatever thickness is desired (lets say .040-.050).
Place the ring between 2 pieces of aluminum (or whatever you desire) in the mill vise to support what will become the ends, and mill out the .140 gap with a small end mill. You could probably use a slitting saw instead if you wish.
File the ends to whatever installed gap is needed.
For a bore size of 1.35" we want an uncompressed gap of about .140". (scale that proportionally to whatever bore size you are working with)
Find the circumference of 1.35= 4.241" +.140" gap which is 4.381". Convert to diameter =1.395. This is the od to turn the ring to.
Bore the center, assuming a .060 ring = 1.275 ID. part off at whatever thickness is desired (lets say .040-.050).
Place the ring between 2 pieces of aluminum (or whatever you desire) in the mill vise to support what will become the ends, and mill out the .140 gap with a small end mill. You could probably use a slitting saw instead if you wish.
File the ends to whatever installed gap is needed.
