Shape
No.
D
Wheel
Diameter
inches
T
Wheel
Thickness
inches
1/2"
Overhand
& Thd.
Mdls.
Overhand
1"
1-1/2"
2"
2-1/2"
3"
A 1
3/4
2 1/2
20,960
16,100
13,030
10,400
7,950
5,580
A 2
1
1 3/4
32,420
26,190
21,740
17,730
13,910
10,170
A 3
1
2 3/4
15,530
11,940
10,130
8,770
7,590
6,500
A 4
1 3/4
1 3/4
28,550
23,150
19,530
16,350
13,360
10,450
A 5
3/4
1 1/8
38,550
31,270
25,770
20,720
15,840
11,060
A 6
3/4
1 1/8
38,550
31,270
25,770
20,720
15,840
11,060
A 11
7/8
2
25,420
20,100
16,550
13,460
10,540
7,710
A 12
1 1/16
1 3/4
38,050
30,790
25,300
20,260
15,400
10,620
A 13
1 1/8
1 1/8
31,850
25,810
21,560
17,750
14,120
10,570
A 14
1 1/16
7/8
43,440
35,510
29,370
23,660
18,140
12,710
A 15
1/4
1
50,510
41,470
34,200
27,380
20,730
14,180
A 21
1
1
35,510
28,840
23,950
19,510
15,240
11,060
A 22
3/4
5/8
46,120
37,960
31,580
25,640
19,890
14,220
A 23
3/4
1
40,300
32,800
27,080
21,800
16,710
11,700
A 24
1/4
3/4
56,000
46,400
38,580
31,210
24,010
16,910
A 25
1
1
35,510
28,840
23,950
19,510
15,240
11,060
A 26
5/8
5/8
48,980
40,410
33,610
27,260
21,090
15,010
A 31
1 3/8
1
27,780
23,970
20,330
17,130
14,100
11,170
A 32
1
5/8
38,200
33,480
27,930
22,820
17,900
13,060
A 33
1
1/2
38,200
35,460
29,690
24,370
19,220
14,160
A 34
1 1/2
3/8
25,460
25,460
25,460
21,870
18,160
14,540
A 35
1
3/8
38,200
38,030
32,040
26,500
21,130
15,850
A 36
1 5/8
3/8
23,510
23,510
23,510
21,070
17,770
14,570
A37
1 3/4
1/4
30,560
30,560
30,560
27,320
22,560
17,890
A38
1
1
35,510
28,840
23,950
19,510
15,240
11,060
A39
3/4
3/4
44,030
36,090
29,930
24,220
18,680
13,230

Type "A" Maximum Speed Chart

 Type "A" Mounted Points

(1/4" Mandrel)