Mounted Wheels and Points Machinery's Handbook, 31st Edition
1041
Mounted Wheels and Mounted Points These wheels and points are used in places that are hard to access and are available with a vitrified bond. The wheels are available with aluminum oxide or silicon carbide abrasive grains. The aluminum oxide wheels are used to grind tough and tempered die steels and the silicon carbide wheels, cast iron, chilled iron, bronze, and other nonferrous metals. The illustrations on pages 1041 and 1042 give the standard shapes of mounted wheels and points as published by the Grinding Wheel Institute. A note about the maximum operating speed for these wheels is given at the bottom of the first page of illustrations. Metric sizes are given on page 1043 .
” 5
” 3 8
” 5
16
” 3 4
” 3 4
” 5 8 ” 5
” 3 4
16
” 5 8
” 1 4
” 3 4
” 7
” 1 2
” 7
” 5 8
” 3 8
16
16
32
B-41
B-42
B-43
B-44
B-51
B-52
B-53
B-61
” 1 8
” 3 8
” 3
” 3 8
” 1 4
” 1 4
” 11 16
16
” 5 8
” 1 2
” 3 4
” 1 8
” 1 8 B-97 B-101
” 1 2
” 5 8
” 5 8
” 1 4
B-62
B-71
B-81
B-91
B-92
B-96
” 1 2
” 3 8
” 3
” 11 16
16
” 3
” 7
” 5 8
B-104 ” 5 16
” 1 2
” 3 8
” 3 8
” 1 8 B-124
16 B-123
16
B-103
B-111
B-112
B-121
B-122
” 1 2
” 1 2
” 1 2
” 3 8
T
T
T
T
” 3 8
” 1 4
” 1 2
” 3 8
D
D
D
D
B-131
B-133
Group W
B-132
B-135
Fig. 1a. Standard Shapes and Sizes of Mounted Wheels and Points ANSI B74.2-2003 See Table 1 for inch sizes of Group W shapes and for metric sizes for all shapes. The maximum speeds of mounted vitrified wheels and points of average grade range from about 38,000 to 152,000 rpm for diameters of 1 inch down to 1 ⁄ 4 inch. However, the safe operating speed usually is limited by the critical speed (speed at which vibration or whip tends to become excessive), which varies according to wheel or point dimensions, spindle diameter, and overhang.
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online