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The Cylinder Yoke casting would be mounted on a lathe faceplate to bore the water jacket out for the liner. My Colchester Chipmaster has an eleven inch swing which was sufficient for the set up I envisaged. To prepare for milling the base of the Cylinder Yoke I filed the top of the casting flat so it could be bolted down firmly onto the milling machine table using a length of 1/2" allthread. The angle plate was positioned to help keep the casting still and the set up was pretty rigid. I also milled what I could reach of the underside of the casting where the cylinder liner exits.The casting was then mounted with a temporary support pillar on a piece of 5/8" thick gauge plate which was in turn bolted to the lathe faceplate. I took my time positioning the casting also taking into account the raw cylinder liner casting, to decide on the best position/compromise to start boring. The job proceeded taking 10 - 15 thou cuts at about 150 rpm to avoid chatter.How's that Graham? Andy
Oh, and I also tried 638, without pins that was a disaster too.
Quote from: Alyn Foundry on January 21, 2016, 01:35:53 PMOh, and I also tried 638, without pins that was a disaster too. Graham I thought you retired long before September 2013.Jo