Material |
Hardness |
Drill Type |
Point Style |
Point
Angle |
Speed
(SFM) |
Feed |
Coolant |
Aluminum / Aluminum Alloys |
- |
High Helix |
Standard |
118° |
200-300 |
Medium to Heavy |
Water Soluble |
Aluminum Bronze |
- |
High Helix |
Standard |
118° |
50-100 |
Medium to Heavy |
Water Soluble |
Brass, Free Machining |
- |
Low Helix |
Standard |
118° |
100-250 |
Medium to Heavy |
Water Soluble |
Bronze, Soft Medium |
Below 200 |
General Purpose |
Standard |
118° |
70-150 |
Medium to Heavy |
Water Soluble |
Bronze, High Tensile |
- |
Low Helix or Half RD |
Standard |
118° |
50-100 |
Medium to Heavy |
Water Soluble |
Copper / Copper Alloys |
- |
General Purpose |
Standard |
118° |
100-200 |
Medium |
Water Soluble |
High Temp Alloys, Cobalt Base |
180-300 |
Cobalt |
Split Point |
135° |
5-20 |
Medium |
Activated Oils |
High Temp Alloys, Iron Base |
180-300 |
Cobalt |
Split Point |
135° |
5-20 |
Medium |
Activated Oils |
High Temp Alloys, Nickel Base |
180-300 |
Nitro® or Cobalt |
Split Point |
135° |
5-15 |
Medium |
Activated Oils |
Iron, Soft Case |
Up to 150 |
Heavy Duty or Nitro® |
Split Point |
135° |
75-150 |
Medium |
Dry / Air |
Iron, Medium Case |
150-250 |
Heavy Duty or Nitro® |
Split Point |
135° |
50-100 |
Medium |
Dry / Air |
Iron, Hard Case |
Over 250 |
Carbide |
Standard |
118° |
40-75 |
Light to Medium |
Dry / Air |
Plastic & Related Materials |
- |
Low Helix |
Low Angle |
90° |
100-200 |
Medium to Heavy |
Dry / Air |
Steel, Low Carbon Alloy |
125-275 |
General Purpose |
Standard |
118° |
50-70 |
Medium |
Water Soluble |
Steel, Medium Carbon Alloy |
275-325 |
Heavy Duty or Nitro® |
Split Point |
135° |
40-55 |
Medium |
Water Soluble |
Steel, High Carbon Alloy |
Over 325 |
Cobalt |
Split Point |
135° |
30-50 |
Medium |
Water Soluble |
Steel, Low & Medium Carbon Alloy |
Below 175 |
General Purpose |
Standard |
118° |
45-95 |
Medium to Heavy |
Water Soluble |
Steel, High Carbon Alloy |
175-225 |
General Purpose |
Standard |
118° |
45-65 |
Medium |
Water Soluble |
Stainless Steel, Austenitic |
Below 300 |
Heavy Duty or Nitro® |
Split Point |
135° |
40-60 |
Medium to Heavy |
Water Soluble |
Stainless Steel, Precipitation |
Over 300 |
Cobalt |
Split Point |
135° |
20-40 |
Medium |
Cutting Oil |