| CUTTING SPEED CHART FOR USE WITH MAYDOWN SMALL DIAMETER END MILLS Cutters from pages A2 and A7 |
| All the values shown below are only the recommended values and can be subject to outside influenses For example: Machine and component stability, length of cutting tool and cutting resistance. |
| FEED RATES PER TOOTH (mm) | ||||||
| MATERIAL | GRADE | CUTTING | CUTTER | DEPTH | CUTTER | DEPTH |
| TO BE | SPEED | DIAMETER | OF CUT | DIAMETER | OF CUT | |
| MACHINED | m/min | 10-12mm | mm | 16-25mm | mm | |
| MILD STEEL | AC900, LT30 | 150 - 280 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 |
| T40 | 180 - 250 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| T71S, T80S | 150 - 280 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| P40* | 150 - 200 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| TOOL STEEL | AC900, LT30 | 90 - 180 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 |
| T40 | 100 - 130 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| T71S, T80S | 100 - 175 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| T90S | 100 - 175 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| P40* | 80 - 100 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| STAINLESS STEEL | AC900, LT30 | 150 - 200 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 |
| T40 | 60 - 120 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| T80S | 60 - 180 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| T95 | 60 - 180 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| CAST IRON | AC900, LT30 | 150 - 230 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 |
| T70 | 150 - 200 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 | |
| ALUMINIUM | K10* | 300 - 400 | 0.10 - 0.15 | 0.5 - 2.0 | 0.10 - 0.15 | 0.5 - 4.0 |
| SUPER ALLOYS | AC900, LT30 | 25 - 65 | 0.10 - 0.15 | 0.5 - 2.0 | 0.08 - 0.12 | 0.5 - 3.0 |
| SA10 | 25 - 65 | 0.10 - 0.15 | 0.5 - 2.0 | 0.08 - 0.12 | 0.5 - 3.0 | |
| All small diameter cutters are manufactured undersize from the nominal diameter
this is to allow the cutters to rough out slots. *Uncoated grades FORMULAE FOR MILLING CALCULATIONS |
| Vc = | Dia x π x S | Key: | |
| 1000 | |||
| Vc - Cutting Speed (m / min) | |||
| Fa = | F | Fa - Feed per Tooth (mm) | |
| rpm x T | Q - Metal removal (cm3 / min) | ||
| S - Spindle speed (rpm) | |||
| Q = | Dc x Wc x F | F - Table feed (mm / min) | |
| 1000 | Dia - Cutter diameter (mm) | ||
| T - Number of teeth | |||
| S = | Vc x 1000 | Dc - Depth of cut (mm) | |
| Dia x π | Wc - Width of cut (mm) |