J. Elliott
Hot Rolled
- Joined
- May 18, 2002
- Location
- Boonville, NC 27011
Fellas,
I've got a line on a decent set of cobalt drills, but they are 135 degree 'heavy-duty' drills. Not 'production grade' 118 degree. I joined up at tech school a semester late, after they'd taught drill grinding, and am sitting here realizing I don't have a good handle on the difference. Plus, I don't think we ever used anything other than normal drills at school anyway....
I know I've never sharpened anything exotic. Is a 135 split-point cobalt something that can be touched up on a regular grinder? Or do you need a fancy drill grinder with a proper split-point setup?
Mainly though, would 135 degree split point cobalt drills make a good all-purpose drill in a home-shop envirnment? I'm completely in the dark about 118 vs. 135, performance and longevity wise.
Many thanks for y'all's time.
I've got a line on a decent set of cobalt drills, but they are 135 degree 'heavy-duty' drills. Not 'production grade' 118 degree. I joined up at tech school a semester late, after they'd taught drill grinding, and am sitting here realizing I don't have a good handle on the difference. Plus, I don't think we ever used anything other than normal drills at school anyway....
I know I've never sharpened anything exotic. Is a 135 split-point cobalt something that can be touched up on a regular grinder? Or do you need a fancy drill grinder with a proper split-point setup?
Mainly though, would 135 degree split point cobalt drills make a good all-purpose drill in a home-shop envirnment? I'm completely in the dark about 118 vs. 135, performance and longevity wise.
Many thanks for y'all's time.