Baileigh DP-1250VS, Operator'S Manual

Page: 31 / 56

28
28
Speeds for High Speed Steel Drills
Material Speed (SFPM)
Alloy Steel
— 300 to 400 Brinell
20-30
Stainless Steel 30-40
Automotive Steel Forgings 40-50
Tool Steel, 1.2C 50-60
Steel, .4C to .5C 70-80
Mild Machinery Steel, .2C to .3C 80-110
Hard Chilled Cast Iron 30-40
Medium Hard Cast Iron 70-100
Soft Cast Iron 100-150
Malleable Iron 80-90
High Nickel Steel or Monel 40-50
High Tensile Bronze 70-150
Ordinary Brass and Bronze 200-300
Aluminum and its Alloys 200-300
Magnesium and its Alloys 250-400
Slate, Marble, and Stone 15-25
Plastics and similar materials (Bakelite) 100-150
Wood 300-400
Titanium Alloys 10-25
Titanium Alloy Sheet 50
–60
Note: In cases where carbon steel drills are
applicable, the drill should be run at speeds of 40 to 50
percent of those given above.