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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Fixture / jig for clmping 20mm stock in lathe ......
My apologies for the blank subject field....
"Robbo" wrote in message ... I'm looking for some ideas on how to repeatedly and hold some 20mm OD PVC round bar in a lathe chuck. I'm turning batches of 20 pieces - they start as a 25mm length of 20mm OD PVC rod and end up with: a) an 11mm thru' bore b) a 17mm x 5mm counterbore. c) a 17mm OD step on the outside at one end. Hopefully the cross-section below will make sense of my ramblings: __________ _____| ____] |___________] 11mm thru 17mm internal counterbore bore ___________ |_____ ]____ |__________] 17mm 20mm OD step Is there a neat way I can fabricate some sort of jig into which I can quickly clamp the 25 L x 20 OD PVC pieces so they will be in the same location? Some sort of simple collet?? I need to achieve 0.5mm accuracy lengthways and 0.2mm on the turned OD and internal counterbore diameter. Unfortunately I dont have a milling machine - just the lathe,a CQ6230 lathe (Chinese copy) with a 3 & 4jaw chucks + faceplates etc. TIA Robbo (the novice) |
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