For Best Results, Use RobbJack’s Speed and Feed Calculator

  • Quick, easy calculations, both metric and standard
  • End mill speeds and feeds
  • Slotting saw speeds and feeds
  • Troubleshooting
  • Printable results
  • Simultaneous tool recommendations

Click Here!

  • Calculator Screen Shot 1
  • Calculator Screen Shot 2
  • Calculator Screen Shot 3

General Speed and Feeds

Tool Formulas

Critical formulas, standard and metric, with examples. (Click Here)

Tool Modifications

Get your tools modified the way you need them! (Click Here)

Material Surface Feet/Minute Surface Meters/Minute Chip Load Per Tooth
Aluminum / Non-Ferrous
Ferrous
2024Max RPMMax RPMTool Diameter × .0256
6061 (T1–T3)Max RPMMax RPMTool Diameter × .0128
6061 (T4–T6)Max RPMMax RPMTool Diameter × .0256
7075Max RPMMax RPMTool Diameter × .0256
Non-Ferrous
Brass750230Tool Diameter × .0128
Copper600190Tool Diameter × .0128
MagnesiumMax RPMMax RPMTool Diameter × .0256
Titanium, Steel and Hi-Temperature Alloys
Titanium
Commercially Pure 350100Tool Diameter × .0048
6AL-4V23055Tool Diameter × .0048
6AL-6V18035Tool Diameter × .004
Steel
1018–1020350110Tool Diameter × .0064
4130 26080Tool Diameter × .0032
4140 22070Tool Diameter × .0032
434028090Tool Diameter × .0032
Tool Steel (Annealed)
A2350110Tool Diameter × .0032
D226080Tool Diameter × .0032
H1323070Tool Diameter × .0032
P20350110Tool Diameter × .00496
Stainless Steel
303500150Tool Diameter × .0048
30422570Tool Diameter × .0032
316 24075Tool Diameter × .0032
15-5/17-4 PH20060Tool Diameter × .0032
440C20060Tool Diameter × .0032
Inconel
625 / 71810030Tool Diameter × .0036
Composites & Plastics
G10 Fiberglass/Polyester1000300Tool Diameter × .0136
Graphite1000300Tool Diameter × .0256
Graphite Fiber/Epoxy800250Tool Diameter × .008
Plastics1300400Tool Diameter × .0256
Other Materials
Ductile Iron350110Tool Diameter × .0096
Gray Cast Iron500150Tool Diameter × .0128

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