I have a 2" long, 1/4" square Cobalt tool bit I have ground for cutting internal threads with a boring bar. The bit is too long to fit in the hole in the work. My Dremel cut off wheel is very slow, and grinding an inch off would be worse. TIA
Use a parting wheel to notch the tool all around and then give it a sharp hit with a hammer. Place a piece of aluminum shim under one end so the cut is not supported. Should break cleanly at the parting line. A parting wheel should but fairly fast---you might find you want to just cut it in half with one.
Harold
Harold
What Harold said -- also, use an air die grinder with a cutoff mandrel or a cheap cutoff air tool. Clark, if you don't have those, you're welcome to come over and do it at my house. To break it, put the lower end in the bench vise with the top sticking straight up, then put a rag over everything and hit the top smartly with a hammer right through the rag. Else you may never find the top piece (don't ask me how I learned this :-). - GWE
Score it with the dremel, stick it in the bench vice and snap it off with a well placed hammer blow. Regards. Ken.
1) notch one side of the tool all the way across, 1/16 or so deep. A v-notch works best 2) place the tool in your vise, sticking straight up, with the notch towards you. 3) cover with a rag
4) smack the tool with a brass hammer, away from you.
Jim
The tungsten carbide metal saw blades (for metal cutting hand saw, the "blade" looks like a piece of wire with crystals), MEANT for cutting ceramic tiles, do work really well for cutting hardened metals.
Kristian Ukkonen.
OK, I broke it. That works.
I cut the internal threads. They are not supposed to be left handed:( I'm going to bed.
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.