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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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306 SS threading
I'm making some shifter and brake pegs for a friend's bike , and have run
into a small problem . I suspect I have work hardened the SS when I drilled it , because I've never had this much trouble cutting threads . I have units made and drilled 3/16" diameter and about 1 1/2" deep , but need some advice . The threads are to be 3/8-16 , and only need to be about 1 inch deep . The first one I drilled like 2 inches deep , in 2 steps (after a 3/16" pilot hole). The piece was quite warm when I finished . Should I take these out to the tap drill diameter in 1 step ? Should I use coolant , and if so what kind ? The pegs are slotted 1/8" slots spaced 1/8" apart (done with a parting tool) , and got very warm during this machining , could that have hardened the SS some ? -- Snag aka OSG #1 '76 FLH "Bag Lady" BS132 SENS NEWT "A hand shift is a manly shift ." shamelessly stolen none to one to reply |
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