36
Thrust Lbs. for Internal/External Broaching
Approximate Axial Loads (Lbs.) by Broach Forms & Materials
•
The table is provided as a reference to compare loads between various forms, sizes
and materials.
•
Rotary broaching is a cutting process, requiring very little pressure (low axial machine loads).
•
Minimal pressure is generated when following Slater Tools’ workpiece preparation
recommendations. See pages 34 and 35.
•
The tool holder takes the brunt of the broaching forces, not the machine.
•
Actual loads should be less than the values in the table.
Aluminum
(6061)
Broach Forms
Internal
External
F.C. Brass
(360)
Cold Rolled
(12
L14)
Alloys
(4140)
S.S.
(303
SS)
Super Alloys,
S.S. 400 Series,
Titanium, etc.
(17-4
PH, 18-8PH...)
Softer
Material Hardness
Harder
TYPE SHAPE SIZE
1/8”
41
48
54
68
81
88
1/8”
52
61
69
87
104
113
1/8”
90
95
120
150
177
200
1/8”
114
133
152
190
228
247
1/2”
636
742
848
1,060
1,272
1,378
1/2”
785
917
1,047
1,310
1,570
1,702
1/2”
1,430
1,670
1,910
2,385
2,623
3,100
1/2”
1,696
979
2,262
2,827
3,393
3,676
1”
2,530
2,950
3,371
4,215
5,060
5,480
1”
3,142
3,666
4,188
5,236
6,284
6,807
1”
5,700
6,650
7,600
9,500
11,400
12,350
1”
6,786
7,917
9,048
11,310
13,571
14,703
3/8”-14
Teeth
166
133
220
190
331
360
3/8”-14
Teeth
199
232
265
332
397
431
1”-36
Teeth
1,178
1,319
1,571
1,885
2,356
2,552
1”-36
Teeth
1,414
1,650
1,885
2,356
2,827
3,063
Hex
Hex
Serrations
Serrations
Square
Square
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•
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