(Part A) Machinerys Handbook 31st Edition Pages 1-1484

Machinery's Handbook, 31st Edition

GRINDING WHEELS

1293

Table 4. Grinding Wheel Recommendations for Hardened Tool Steels According to their Grindability Operation Wheel or Rim Diameter, Inches First-Choice Specifications Second-Choice Specifications

Group 1 Steels

Surfacing

Surfacing wheels

14 and smaller 14 and smaller

Wet FA46-I8V SFA46-G12VP Dry FA46-H8V FA46-F12VP Wet FA36-I8V SFA36-I8V Wet FA30-H8V FA30-F12VP Wet FA36-H8V FA46-F12VP 2 inches, go one grade softer in

Over 14

2 rim or

1 ∕

Segments or Cylinders

less

Cups

3 ∕ 4 rim or less

(for rims wider than 1 1 ∕ available specifications)

Cutter sharpening Straight wheel

… Wet FA46-K8V FA60-K8V … Dry FA46-J8V FA46-H12VP … Dry FA60-J8V FA60-H12VP … Dry FA46-L8V FA60-H12VP … Wet SFA46-L5V SFA60-L5V

Dish shape Cup shape

Form tool grinding

8 and smaller 8 and smaller 10 and larger 14 and smaller 16 and larger

Wet FA60-L8V to FA100-M7V Dry FA60-K8V to FA100-L8V

Wet FA60-L8V to FA80-M6V

Cylindrical

Wet SFA60-L5V Wet SFA60-M5V

… … …

Centerless Internal

… Wet SFA60-M5V

Wet SPA80-N6V SFA80-N7V Wet SFA60-M5V SFA60-M6V Wet SFA54-L5V SFA54-L6V Wet SFA46-L5V SFA46-K5V Dry FA80-L6V SFA80-L7V Dry FA70-K7V SFA70-K7V Dry FA60-J8V FA60-H12VP Dry FA46-J8V FA54-H12VP Wet FA46-I8V FA46-G12VP Dry FA46-H8V FA46-F12VP Wet FA46-H8V SFA46-I8V Wet FA30-G8V FA36-E12VP Wet FA36-H8V FA46-F12VP 2 inches, go one grade softer in

Production grinding

Under 1 ∕ 2

2 to 1

1 ∕

Over 1 to 3 Over 3 Under 1 ∕ 2

Tool room grinding

2 to 1

1 ∕

Over 1 to 3

Over 3

Group 2 Steels