Piston Ring Splitter

[jpaul]

Some time ago I saw a piston ring splitter that was featured in SIC? And now I have use for such a device. I have pictures of the tool but additional guidance would be appreciated. How are the cutter blanks held in the body? Is there a special procedure to cut the chisels on center? What issue of SIC was this tool featured in?

 

[gmac]

Perhaps this may help;

http://modelenginenews.org/feeney/pg8.html

Garry

 

[Maryak]

A couple of years ago I had occasion to make a piston and associated rings for a 12" to the foot Weirs reciprocating steam pump.

Settled on the Paul Chernikeeff method and also applied it to my model mill engine.

Works a treat provided you use spun or even better double spun cast iron.

Attached is an excel file I made to calculate all the bits for the ring blank.

Hope this helps.

View attachment Pistoncalc.xls

 

[jpaul]

Gary,
Thanks for the reference to modelenginenews. The image of the "ring cleaver" along with the author's explanation of how he made his cutters answered my questions.

Maryac,
I found your reference to spun and double spun CI informative. When polishing the OD of my rings, I noticed a fine, grainy, spiral ribbon uniformly aligned on the semi polished surface. Adds an additional quality to 'fine grained cast iron'.

thank you both