Machinery's Handbook, 31st Edition
INDEXABLE INSERTS
847
Table 3b. Indexable Insert Holder Application Guide Table 3b. (Continued) Indexable Insert Holder Application Guide
Application
Tool
N
d d
d
15°
K
C
N
–5° 5°
d d
L C
N
33°
d d
d
N T
27°
P
d d
d
N
d d
d
27°
N D
N
d d d
d
d d d
S S
45°
P
d d d
d
d d d
N
10°
d d
W T
Sintered Carbide Blanks and Cutting Tools Sintered Carbide Blanks.— As shown in Table 4, American National Standard ANSI B212.1-2002 provides standard sizes and designations for eight styles of sintered carbide blanks. These blanks are the unground solid carbide from which either solid or tipped cut ting tools are made. Tipped cutting tools are made by brazing a blank onto a shank to pro duce the cutting tool; these tools differ from carbide insert cutting tools which consist of a carbide insert held mechanically in a tool holder. A typical single-point carbide-tipped cutting tool is shown in Fig. 1 on page 849 . Single-Point, Sintered Carbide-Tipped Tools.— American National Standard ANSI B212.1-2002 covers eight different styles of single-point, carbide-tipped general purpose tools. These styles are designated by the letters A to G inclusive. Styles A, B, F, G, and E with offset point are either right- or left-hand cutting as indicated by the letters R or L. Dimensions of tips and shanks are given in Table 5 to Table 12. For dimensions and toler- ances not shown, and for the identification system, dimensions, and tolerances of sintered carbide boring tools, see the Standard. A number follows the letters of the tool style and hand designation, and, for square shank tools, represents the number of sixteenths of an inch of width, W , and height, H . With rect angular shanks, the first digit of the number indicates the number of eighths of an inch in the shank width, W , and the second digit the number of quarters of an inch in the shank height, H . One exception is the 1 1 ⁄ 2 × 2-inch size, which has been arbitrarily assigned the number 90.
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