jmc
Elite Member
- Joined
- Jul 21, 2003
- Messages
- 3,202
- Location
- SW Indiana
- Tractor
- Ford 1920 4x4 (traded in on Kubota). Case 480F TLB w/4 in 1 bucket, 4x4. Gehl CTL60 tracked loader, Kubota L4330 GST
Standard 118* drill points don't cut all the way to center. Instead, that center dead zone is "wallowed out", which takes more down pressure- more difficult in hand held drilling.
135* split points cut virtually to center, which requires less downforce.
Cobalt alloy is harder but more brittle than HSS. It's better for rigid setups, which hand drilling never is. In my hands, the cutting edges chip.
For hand drilling, the ideal for me would be HSS 135* split points. They might be hard to find.
135* split points cut virtually to center, which requires less downforce.
Cobalt alloy is harder but more brittle than HSS. It's better for rigid setups, which hand drilling never is. In my hands, the cutting edges chip.
For hand drilling, the ideal for me would be HSS 135* split points. They might be hard to find.
