Machinery's Handbook, 31st Edition
GRINDING WHEELS
1295
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 Table 4. (Continued) Grinding Wheel Recommendations for Hardened Tool Steels
Cylindrical
14 and less 16 and larger
Wet FA80-L5V SFA80-L6V Wet FA60-L6V SFA60-K5V
Centerless Internal
… Wet FA60-L5V SFA60-L5V
Production grinding
Wet FA90-L6V SFA90-L6V Wet FA80-L6V SFA80-L6V Wet FA70-K5V SFA70-K5V Wet FA60-J5V SFA60-J5V Dry FA90-K8V SFA90-K7V Dry FA80-J8V SFA80-J7V Dry FA70-I8V SFA70-G12VP Dry FA60-I8V SFA60-G12VP
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 4 Steels
Surfacing
Straight wheels
14 and smaller 14 and smaller
Wet FA60-I8V C60-JV Wet FA60-H8V C60-IV Wet FA46-H8V C60-HV Wet FA46-G8V C46-HV
Over 14
1
2 rim or
1 ∕
Segments
less
Wet FA46-G8V C60-HV
1
2 rim or
1 ∕
Cylinders
less
Cups
Wet FA46-G6V C60-IV
3 ∕ 4 rim or less
(for rims wider than 1 1 ∕ available specifications)
2 inches, go one grade softer in
Form tool grinding
8 and smaller 8 and smaller 10 and larger 14 and less 16 and larger
Wet FA60-J8V to FA150-K8V Dry FA80-I8V to FA180-J8V Wet FA60-J8V to FA150-K8V Wet FA80-K8V C60-KV Wet FA60-J8V C60-KV Wet FA90-L8V C90-LV Wet FA80-K5V C80-KV Wet FA70-J8V C70-JV Wet FA60-I8V C60-IV Dry FA90-K8V C90-KV Dry FA80-J8V C80-JV Dry FA70-I8V C70-IV Dry FA60-H8V C60-HV
Cylindrical
Internal
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
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