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| Threading stainless. |
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| NeoTech:
Well gonna start off and say im terribad at threading. (see previous thread about lathe setup). Well now i hade som stainless.. I tried to thread it.. it broke my carbide tips.. and it broke my HSS tool.. Im guessing god didnt want stainless steel threaded from the begining. ;) Well i resharpen my hss (the good thing with hss tools) and i went at it again.. took lighter cuts (0.02mm) and well.. chipped again.. thats some hard stuff right there.. And well threading 0.02mm at a time.. that will take frickin forever.. so i figure.. there must be trick to it!. =) And yeah i threaded a piece of aluminium and it worked after i knocked of the tops of the thread so it didnt jam in the nut. ;) |
| Pete.:
Grind up an ACME thread tool - you won't break the tip off that! :D |
| DaveH:
NeoTech, Any idea of the type of stainless - 303, 316 ??? Also the size of the bar and the thread. Some types are easier than others :thumbup: :beer: DaveH |
| NeoTech:
No idea.. its mysterious stainless.. its kinda gummy actually.. a 12mm rod i have alot of.. i turned it to 9.8 so i could thread a M10/1.5 on it. But well turning metric so i never disengage the halfnut. so when "turning off" and i back off it has more or less welded to the rod and when i back off i hear "click" and the tip is off.. so annoying.. And Pete, the weirdo homemade tool you sent me, is AAawsome turning stainless with.. 1.5mm at each pass easy and i can go fast. But well yeah the threading bit is ruined then. *whistling* gonna have to learn to make threading tools myself ;D |
| DaveH:
NeoTech, You will have to use lots of cutting fluid. To stop the tips breaking the tip has to be fully withdrawn from the work piece before it stops. Perhaps the best way would be to turn (set) the top (compound) slide to 29deg and screw cut it that way - if you are not already doing that way. :beer: DaveH |
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