Sienci Labs
1/2" Round Groove Bit
Type: ball nose bit · Diameter: 0.5" · Flutes: 2 · Shank: 0.25"
Starting points only, copied from the makers' own published data. Every machine differs: test in scrap, tune by ear. Neither ChipLoad nor the makers are responsible for broken tools.
Published values, summarized per material and machine class. For the full CAM library (plunge, depth, stepover), download it from the maker.
| Material | Machine class | RPM | Feed IPM | Chip load (in) | Note | Source |
|---|---|---|---|---|---|---|
| Hardwood | hobby-light | 17000 | 40.94 | 0.0012 | [Tested on Sienci LongMill MK2; converted from mm by ChipLoad] | Sienci Labs |
| Softwood | hobby-light | 17000 | 40.94 | 0.0012 | [Tested on Sienci LongMill MK2; converted from mm by ChipLoad] | Sienci Labs |
Retrieved 2026-10-16. Get the tool file from the maker: Sienci Labs downloads
Weekly "what changed" email: coming soon
We'll email you when a maker updates their feeds and speeds.