Wanted a branding iron to 'sign' my work
Random offcut of 2" dia brass. Original artwork done in Inkscape and free Carbide Create.
Faced the blank in my metal lathe. Tapped for 1/4x20 on the backside. Fixtured onto scrap plywood with a bolt, painters tape and CA glue. Re-faced 0.006" DOC on the CNC just in case the plywood was not flat.
Tooling: 1/8" EM at 0.01" DOC at 24 fpm, 18K rpm
60 degree Vee bit at 0.05" DOC at 35 fpm, 18K rpm
Full depth of cut is 0.05"
Heat to 600F and apply to a piece of wood..
Challenges/areas for improvement:
- Had trouble centering the workpiece - probably operator error. Next time either double check the alignment, or change the design so it doesn't use the full diameter of the brass bar stock.
- I had to leave the workpiece overly thick @ ~0.4" to allow it to be tapped for a bolt. Wasted material and it takes a while to heat with a torch. Ideally, silver-solder a fitting on the back and reduce the thickness to 0.25"
- the little trim router on my CNC didn't sound super happy cutting 0.05" in brass
-Mark
Random offcut of 2" dia brass. Original artwork done in Inkscape and free Carbide Create.
Faced the blank in my metal lathe. Tapped for 1/4x20 on the backside. Fixtured onto scrap plywood with a bolt, painters tape and CA glue. Re-faced 0.006" DOC on the CNC just in case the plywood was not flat.
Tooling: 1/8" EM at 0.01" DOC at 24 fpm, 18K rpm
60 degree Vee bit at 0.05" DOC at 35 fpm, 18K rpm
Full depth of cut is 0.05"
Heat to 600F and apply to a piece of wood..
Challenges/areas for improvement:
- Had trouble centering the workpiece - probably operator error. Next time either double check the alignment, or change the design so it doesn't use the full diameter of the brass bar stock.
- I had to leave the workpiece overly thick @ ~0.4" to allow it to be tapped for a bolt. Wasted material and it takes a while to heat with a torch. Ideally, silver-solder a fitting on the back and reduce the thickness to 0.25"
- the little trim router on my CNC didn't sound super happy cutting 0.05" in brass
-Mark