Posted by dr sportster on September 28, 2013 at 16:38:36 from (68.196.137.127):
In Reply to: new lathe posted by bfullmer on September 28, 2013 at 15:17:28:
Look up Diamond tool holder. It has nothing to do with diamonds but is a tool holder that cuts from the end of the tool . It comes with a grinding jig and instructions . You can cut threads with it . something about being on the end makes it cut very nicely. Just google diamnod tool holder and you will see pics of it. You tool must be dead center which you can do by runing it gently against the thread gauge. [small v notched thread checker]. If the thread gauge is pushed at a 90 degree to the round workpiece the tool bit is centered. Lindsay books has a South Bend book unfortunatly they have closed but eBay will find you one [maybe reprint] fairly easily.The grinding of the tool bit is very important so the diamond tool holder is easy as the jig holds it to grind. The rest on the grinder must be center of the wheel .As I said it comes with complete instructions and will make a great cut. This may not be your total problem but it is a nice set-up. It takes a 1/4 inch square bit. You also may have a piece of iron pipe which has different considerations than steel. Youtube is your friend too. Youtube search lathe... south bend etc. You tube can show how to grind standard tool bits.If you have alot of slack it will cut poorly and you will have to gib down the slldes tighter . Better to fight a hard turning handle and make a good part. This site will have some machinists that will give good advice. Be careful and read the safety rules first Have fun .
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