FlexArm A-32 - Torque Requirements for Tapping Chart

10/29/2020 REV. 003 11
TORQUE REQUIREMENTS FOR TAPPING:
Tap Size
Brass
(in/lbs)
Aluminum and
leaded brass
(in/lbs)
200 BHN
Steel
(in/lbs)
300 BHN
Steel
(in/lbs)
400 BHN
Steel
(in/lbs)
Approx.
Break Torque
(in/lbs)
Torque Holder
Factory Setting
(in/lbs)
#6
4
2
7
9
10
18
15
#8
4.5
2.25
8
10
11
30
17
#10
8.5
4.25
15
19
21
42
31
1/4
16
8
28
36
40
106
70
5/16
24
12
42
54
60
180
100
3/8
37
18.5
65
83
93
240
150
7/16
54
27
94.5
122
135
500
250
1/2
68
34
119
153
170
700
300
9/16
88
44
154
198
220
850
350
5/8
119
59.5
208
268
298
1,000
400
3/4
170
85
298
383
425
1,500
620
7/8
238
119
416
536
595
2,100
880
1
337
168.5
590
758
842
2,700
1,200
1-1/4
554
277
970
1,246
1,385
3,000+
2,100
1-1/2
850
425
1,488
1,912
2,125
3,100
1-3/4
1,411
706
2,471
3,177
3,530
5,500
2
1,904
952
3,332
4,284
4,760
7,000