Carbide Tips and Tools Machinery's Handbook, 31st Edition
851
Table 6. American National Standard Style B Carbide-Tipped Tools with 15-degree Side-cutting-edge Angle ANSI B212.1-2002 (R2007)
7 ° ±1 °
6 ° ±1 °
To sharp corner
15 ° ±1 °
10 ° ±2 °
W
F Ref
Overhang T
A
L
R
15 ° ±1 °
C
0 ° ±1 °
H
Tool designation and carbide grade
Overhang
7 ° ±1 °
B
10 ° ±2 °
Style GR right hand (shown) Style GE left hand (not shown)
Designation
Shank Dimensions
Tip Dimensions
Tip Designation a
Style BR
Style BL
Width A
Height B
Length C
Thickness T
Width W
Length L
Square Shank
2
2015 2040 2070 2070 2170 2230 2310
BR 4 BR 5 BR 6 BR 7 BR 8 BR 10 BR 12 BR 16 BR 20 BR 24 BR 44 BR 54 BR 55 BR 64 BR 66 BR 85 BR 86 BR 88 BR 90
BL 4 BL 5 BL 6 BL 7 BL 8 BL 10 BL 12 BL 16 BL 20 BL 24 BL 44 BL 54 BL 55 BL 64 BL 66 BL 85 BL 86 BL 88 BL 90
1 ⁄ 4
5 ⁄ 32 3 ⁄ 16
1 ⁄ 4
1 ⁄ 4
1 ⁄ 16 3 ⁄ 32 3 ⁄ 32 3 ⁄ 32 5 ⁄ 32 3 ⁄ 16 1 ⁄ 8
2 1 ⁄ 4 2 1 ⁄ 2 3 1 ⁄ 2 3 4 4 1 ⁄ 2
5 ⁄ 16
5 ⁄ 16
5 ⁄ 16
3 ⁄ 8
1 ⁄ 4 1 ⁄ 4
1 ⁄ 2 1 ⁄ 2 5 ⁄ 8 3 ⁄ 4
3 ⁄ 8
7 ⁄ 16
7 ⁄ 16
1 ⁄ 2 5 ⁄ 8 3 ⁄ 4
5 ⁄ 16
1 ⁄ 2 5 ⁄ 8 3 ⁄ 4
3 ⁄ 8
7 ⁄ 16 9 ⁄ 16
13 ⁄ 16
1
1
6 7 8 6 6 7 6 8 7 8
{ { { { { { { { { { {
3390, 4390 3460, 4460 3510, 4510 3360, 4360 3360, 4360 3380, 4380 3430, 4430 2260 3460, 4460 3510, 4510 3510, 4510 3540, 4540
1 1 1
1 ⁄ 4 5 ⁄ 16 3 ⁄ 8
1 1 ⁄ 4 1 1 ⁄ 2
1 1 ⁄ 4 1 1 ⁄ 2
5 ⁄ 8 5 ⁄ 8
Rectangular Shank
1 1 1
5 ⁄ 16 3 ⁄ 8 3 ⁄ 8 1 ⁄ 2 5 ⁄ 8 5 ⁄ 8 5 ⁄ 8 3 ⁄ 4 7 ⁄ 16
5 ⁄ 8 3 ⁄ 4 3 ⁄ 4 3 ⁄ 4
1 ⁄ 2 5 ⁄ 8 5 ⁄ 8 3 ⁄ 4
3 ⁄ 16
1 ⁄ 4 1 ⁄ 4 1 ⁄ 4
1 1 ⁄ 4 1 1 ⁄ 2 1 1 ⁄ 4 1 1 ⁄ 2
15 ⁄ 16
3 ⁄ 4
5 ⁄ 16 5 ⁄ 16
1 1 1
1 1 1
3 ⁄ 8 3 ⁄ 8 1 ⁄ 2
2 2
10 10
1 1 ⁄ 2 1 1 ⁄ 4 a Where a pair of tip numbers is shown, the upper number applies to BR tools, the lower to BL tools. All dimensions are in inches. Brazing Carbide Tips to Steel Shanks.— Sintered carbide tips or blanks are attached to steel shanks by brazing. Shanks usually are made of low-alloy steels having carbon contents ranging from 0.40 to 0.60 percent. Shank Preparation: The carbide tip usually is inserted into a milled recess or seat. When a recess is used, the bottom should be flat to provide a firm even support for the tip. The corner radius of the seat should be somewhat smaller than the radius on the tip to avoid contact and insure support along each side of the recess. Cleaning: All surfaces to be brazed must be absolutely clean. Surfaces of the tip may be cleaned by grinding lightly or by sand-blasting. Brazing Materials and Equipment: The brazing metal may be copper, naval brass such as Tobin bronze, or silver solder. A flux such as borax is used to protect the clean surfaces and prevent oxidation. Heating may be done in a furnace or by oxy-acetylene torch or an oxy-hydrogen torch. Copper brazing usually is done in a furnace, although an oxy-hydrogen torch with excess hydrogen is some- times used. Brazing Procedure: One method using a torch is to place a thin sheet material, such as copper foil, around and beneath the carbide tip, the top of which is covered with flux. The flame is applied to the underside of the tool shank, and, when the materials melt, the tip is pressed firmly into its seat with tongs or with the end of a rod. Brazing material in the form of wire or rod may be used to coat or tin the surfaces of the recess after the flux
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online