ezduzit
Hot Rolled
- Joined
- Jun 27, 2013
- Location
- Marina del Rey, California
Need advice on 316 parting issue.
Bar stock is 3" OD. About 0.9" length of working end has been turned to 2.70" dia. 2.00" dia hole has been bored to a depth of ~2.00". After turning the features of 1 piece into the working end I tried parting using a (MSC/Chinese) 3/32" thick x 1/2" wide HSS parting blade in my Aloris AXA holder. Speed seemed about right, but blade dulled after producing about 1/16" depth of cut. After resharpening I could not make any progress as the material most certainly had work hardened.
I would have used my other Aloris parting tool with 3/4" wide blade (Aloris #SGIH 19-3) with 1/8" thick replaceable carbide insert, but the installed insert felt dulled from previous use and I could not find spare inserts. Lathe is 12" x 35" Logan. Thought of dressing the 1 insert on a diamond wheel, just so I can finish the job. But don't mind ordering the right stuff, even though it would delay completion.
The bar stock must not be removed from the chuck, as I would never get things concentric again, and I have 3 more parts to get out of this setup. All the other machining so far has gone well, using brazed and insert carbide. But I messed up attempting to part with the HSS blade.
Photo shows an aluminum bar chucked in the tailstock to catch the parted off workpiece. The barely started parting groove can be seen in the third largest of the stepped bar OD.
What are my options on how to proceed with parting the work hardened material so I can save the work that's already been done? All comments welcome.
Bar stock is 3" OD. About 0.9" length of working end has been turned to 2.70" dia. 2.00" dia hole has been bored to a depth of ~2.00". After turning the features of 1 piece into the working end I tried parting using a (MSC/Chinese) 3/32" thick x 1/2" wide HSS parting blade in my Aloris AXA holder. Speed seemed about right, but blade dulled after producing about 1/16" depth of cut. After resharpening I could not make any progress as the material most certainly had work hardened.
I would have used my other Aloris parting tool with 3/4" wide blade (Aloris #SGIH 19-3) with 1/8" thick replaceable carbide insert, but the installed insert felt dulled from previous use and I could not find spare inserts. Lathe is 12" x 35" Logan. Thought of dressing the 1 insert on a diamond wheel, just so I can finish the job. But don't mind ordering the right stuff, even though it would delay completion.
The bar stock must not be removed from the chuck, as I would never get things concentric again, and I have 3 more parts to get out of this setup. All the other machining so far has gone well, using brazed and insert carbide. But I messed up attempting to part with the HSS blade.
Photo shows an aluminum bar chucked in the tailstock to catch the parted off workpiece. The barely started parting groove can be seen in the third largest of the stepped bar OD.
What are my options on how to proceed with parting the work hardened material so I can save the work that's already been done? All comments welcome.