The keyway broaches made of HSS in toleranceJS9, P9, H9 according to DIN 6885 are furnished with shims and for the use on materials up to HRC30/BR285.
Following a table that indicates the front rake angle suggested secondly the kind of material that must be machined.
|
MATERIAL |
SUGGESTED FRONT RAKE ANGLE |
|
ALUMINIUM |
10° |
|
CAST IRON |
10° |
|
BRONZE |
12° |
|
MILD STEEL |
12° |
|
STAINLESS STEEL |
14° |
|
HARDENED STEEL UP TO 40 HRC MAX |
14° |
In the following table, on the other hand, we indicate the front rake angle of the different duMONT standard broach types.
|
BROACH TYPE |
FRONT RAKE ANGLE |
|
STANDARD KEYWAY BROACH |
10° |
|
STANDARD ONE-PASS BROACH |
12° |
|
PRODUCTION BROACH |
10° |
|
KEYWAY BROACH |
10° |
|
SQUARE BROACH |
12° |
|
FULL SQUARE BROACH |
12° |
|
KEYWAY BROACH |
10° |
|
HEXAGONAL BROACH |
12° |
|
ROUND BROACH |
12° |
Standard keyway broaches metric sizes
|
BROACH SIZE |
TOL. |
BROACH TOTAL LENGHT |
KEYWAY DEPTH |
SHIMS |
NO.OF CUTS |
LENGHT OF CUT IN STEEL 50 (min and max) |
MAX PRESSURE |
|
2 mm-A |
JS9 |
127 mm |
1.00 mm |
0 |
1 |
6-30 mm |
326 kg |
|
3 mm-A |
JS9 |
127 mm |
1,40 mm |
1 |
2 |
6-30 mm |
294 kg |
|
4 mm-B1 |
JS9 |
172 mm |
1,80 mm |
1 |
2 |
8-42 mm |
517 kg |
|
5 mm-B1 |
JS9 |
172 mm |
2,30 mm |
1 |
2 |
8-42 mm |
843 kg |
|
5 mm-C |
JS9 |
299 mm |
|
1 |
2 |
10-64 mm |
666 kg |
|
6 mm-C |
JS9 |
299 mm |
2,80 mm |
1 |
2 |
10-64 mm |
952 kg |
|
7 mm-C |
JS9 |
299 mm |
|
1 |
2 |
10-64 mm |
1315 kg |
|
8 mm-C |
JS9 |
299 mm |
3,30 mm |
2 |
3 |
10-64 mm |
1669 kg |
|
10 mm-D |
JS9 |
353 mm |
3,30 mm |
2 |
3 |
25-150 mm |
2948 kg |
|
12 mm-D |
JS9 |
353 mm |
3,30 mm |
2 |
3 |
25-150 mm |
3810 kg |
|
14 mm-D |
JS9 |
353 mm |
3,80 mm |
2 |
3 |
25-150 mm |
5034 kg |
|
16 mm-E |
JS9 |
394 mm |
4,30 mm |
3 |
4 |
25-150 mm |
4263 kg |
|
18 mm-E |
JS9 |
394 mm |
4,40 mm |
3 |
4 |
25-150 mm |
4808 kg |
|
20 mm-F |
JS9 |
515 mm |
4,90 mm |
3 |
4 |
25-150 mm |
3991 kg |
|
22 mm-F |
JS9 |
515 mm |
5,40 mm |
4 |
5 |
25-150 mm |
4263 kg |
|
24 mm-F |
JS9 |
515 mm |
5,40 mm |
5 |
6 |
25-150 mm |
4808 kg |
|
25 mm-F |
JS9 |
515 mm |
5,40 mm |
4 |
5 |
25-150 mm |
5579 kg |
|
28 mm |
JS9 |
515 mm |
6,40 mm |
5 |
6 |
25-150 mm |
5443 kg |
|
32 mm |
JS9 |
515 mm |
7,40 mm |
5 |
6 |
25-200 mm |
9344 kg |
|
36 mm |
JS9 |
515 mm |
8,49 mm |
6** |
7 |
25-200 mm |
10976 kg |
|
40 mm |
JS9 |
515 mm |
|
7** |
8 |
25-200 mm |
10205 kg |
|
45 mm |
JS9 |
515 mm |
|
8** |
9 |
25-200 mm |
12337 kg |
** Shims are not supplied with these broaches.
Extra shims
Extra shims are provided in necessary shim sets only.
| BROACH SIZE |
NO.OF SHIMS |
SHIM THICKNESS |
|
3-A |
1 |
0.80 mm |
|
4-B1 |
1 |
0.97 mm |
|
5-B1 |
1 |
1.30 mm |
|
5-C |
1 |
1.20 mm |
|
6-C |
1 |
1.60 mm |
|
7-C |
1 |
1.60 mm |
|
8-C |
2 |
1.30 mm |
|
10-D |
2 |
1.42 mm |
|
12-D |
2 |
1.42 mm |
|
14-D |
2 |
1.60 mm |
|
16-E |
3 |
1.42 mm |
|
18-E |
3 |
1.42 mm |
|
20-F |
3 |
1.60 mm |
|
22-F |
4 |
1.42 mm |
|
24-F |
5 |
1.60 mm |
|
25-F |
4 |
1.42 mm |
|
28 |
5 |
1.42 mm |
|
32 |
5 |
1.60 mm |
For broaches larger than 32 mm ¼” progressive shims are available as special items.