Machinery's Handbook, 31st Edition
DIAMOND WHEELS
1309
Table 4. Designation Letters for Modifications of Diamond Wheels ANSI B74.3-2003 (R2014) Designation Letter Description Illustration T — Threaded Holes Threaded holes are in core. Table 4. (Continued) Designation Letters for Modifications of Diamond Wheels ANSI B74.3-2003 (R2014)
6A2T
Q — Diamond Inserted
Three surfaces of the diamond section are partially or completely enclosed by the core.
1A6Q
V — Diamond Inverted
Any diamond cross section that is mounted on the core so that the interior point of any angle, or the concave side of any arc, is exposed shall be considered inverted. Exception: Diamond cross section AH shall be placed on the core with the concave side of the arc exposed.
1EE1V
1FF1V
W — Wheels Affixed on a Mandrel
1A8W
1A1W
Y — Diamond Inserted and Inverted
See definitions for Q and V.
1EE6Y
1FF6Y The Selection of Diamond Wheels.— Two general aspects must be defined: (a) The shape of the wheel, also referred to as the basic wheel type and (b) The specification of the abrasive portion. Table 5. General Diamond Wheel Recommendations for Wheel Type and Abrasive Specification Typical Applications or Operation Basic Wheel Type Abrasive Specification Single Point Tools (offhand grinding) D6A2C Rough: MD100-N100-B 1 ∕ 8 Finish: MD220-P75-B 1 ∕ 8 Single Point Tools (machine ground) D6A2H Rough: MD180-J100-B 1 ∕ 8 Finish: MD320-L75-B 1 ∕ 8 Chip Breakers D1A1 MD150-R100-B 1 ∕ 8 Multitooth Tools and Cutters (face mills, end mills, reamers, broaches, etc.) Sharpening and Backing off D11V9 Rough: MD100-R100-B 1 ∕ 8 Combination : MD150-R100-B 1 ∕ 8 Finish: MD220-R100-B 1 ∕ 8 Fluting D12A2 MD180-N100-B 1 ∕ 8 Saw Sharpening D12A2 MD180-R100-B 1 ∕ 8 Surface Grinding (horizontal spindle) D1A1 Rough: MD120-N100-B 1 ∕ 8 Finish: MD240-P100-B 1 ∕ 8 Surface Grinding (vertical spindle) D2A2T MD80-R75-B 1 ∕ 8
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