Machinery's Handbook, 31st Edition
1308
DIAMOND WHEELS Table 4. Designation Letters for Modifications of Diamond Wheels ANSI B74.3-2003 (R2014) Designation Letter Description Illustration B — Drilled and Counterbored Holes drilled and counterbored in core.
6A2B
C — Drilled and Countersunk
Holes drilled and countersunk in core.
6A2C
F — Hub
Hub on basic wheel cover
Hub
6A2F
H — Plain Hole
Straight hole drilled in core.
6A2H
J — Recess One Side
1A1J
JJ — Recess Two Sides
1A1JJ
K — Keyway
Arbor hole with keyway
6A2K
M — Holes Plain and Threaded
Mixed holes, some plain, some threaded, are in core.
6A2M
N — Nonsteel Core P — Relieved One Side
Nonsteel core for 1A1R and related shapes
Core relieved on one side of wheel. Thickness of core is less than wheel thickness.
1A1P
R — Relieved Two Sides
Core relieved on both sides of wheel. Thickness of core is less than wheel thickness.
1A1R
S — Segmented Diamond Section
Wheel has segmental diamond section mounted on core. (Clearance between segments has no bearing on definition.)
1A1S
SS — Segmental and Slotted
Wheel has separated segments mounted on a slotted core.
1A1SS
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