Machining data
Cast Aluminum speeds & feeds
Abrasive silicon content rewards a wear-resistant coating and steady chip load. Below are RobbJack's tested starting parameters by diameter — then open the calculator to tune them to your exact tool, depth of cut, and spindle.
| Diameter | Recommended tool | Flutes | SFM | RPM | Feed (IPM) | Chip load (in) |
|---|---|---|---|---|---|---|
| 1/8" | A1-201-04 | 2 | 1,000 | 30,560 | 36.7 | 0.0006 |
| 3/16" | A1-201-06 | 2 | 1,000 | 20,373 | 36.7 | 0.0009 |
| 1/4" | A1-201-08 | 2 | 1,000 | 15,280 | 36.7 | 0.0012 |
| 3/8" | A1-201-12 | 2 | 1,000 | 10,187 | 36.7 | 0.0018 |
| 1/2" | A1-201-16 | 2 | 1,000 | 7,640 | 36.7 | 0.0024 |
| 3/4" | A1-201-24 | 2 | 1,000 | 5,093 | 36.7 | 0.0036 |
Starting parameters for roughing/profiling with a rigid setup — always verify on your machine, tool, and fixturing. Open the calculator to enter your exact depth of cut, spindle RPM/HP, and coating, and to get finishing values and a printable setup sheet.