- Joined
- Sep 3, 2012
- Messages
- 51
I've got a Smith CB1220-XL. I have never had good luck with a cut-off tools. They screams at a very high pitch, generate a lot of heat, and then usually break the tip or whole blade.
I attempted it again tonight and again the blade broke after I nursed it about 3/32nds of an inch.
The part is:
a mild mystery steel.
started out as a 1 1/4 solid bar I drilled and turned to a cylinder shape.
a cylinder 1 1/8" diameter with a wall thickness of 3/8".
sticking out about 1 1/2 inches from a 3 jaw chuck. Unsupported on the right end.
spinning at 840 RPM.
The cutoff tool is
cutting about 1/8th" from the chuck jaws.
Small. The blade is 7/16 or 1/2 inch tall 1/16 or 3/32 wide a the top, narrower at the bottom.
projecting about 1/4 to 3/8 from the holder
Here is what I double checked tonight:
cutting edge right on the center line of the part
the blade was at right angle to the axis
used plenty of oil
carefully sharpened the blade, then honed it with a stone to make sure the burr was gone.
Any advice would be greatly appreciated.
Evan R.
I attempted it again tonight and again the blade broke after I nursed it about 3/32nds of an inch.
The part is:
a mild mystery steel.
started out as a 1 1/4 solid bar I drilled and turned to a cylinder shape.
a cylinder 1 1/8" diameter with a wall thickness of 3/8".
sticking out about 1 1/2 inches from a 3 jaw chuck. Unsupported on the right end.
spinning at 840 RPM.
The cutoff tool is
cutting about 1/8th" from the chuck jaws.
Small. The blade is 7/16 or 1/2 inch tall 1/16 or 3/32 wide a the top, narrower at the bottom.
projecting about 1/4 to 3/8 from the holder
Here is what I double checked tonight:
cutting edge right on the center line of the part
the blade was at right angle to the axis
used plenty of oil
carefully sharpened the blade, then honed it with a stone to make sure the burr was gone.
Any advice would be greatly appreciated.
Evan R.