BROACHING HEADS AND BROACHES
TECHNICAL CHARACTERISTICS The functioning of the broaching head is given by the combination of the inclination of the broach holder body and the rotation of the same. This allows to perform regular profiles both in through holes and in blind holes. With specific broaches it is also possible to create external profiles. The optimal use of the broaching head derives from the correct alignment of the center of the broach with the center of the hole on which the processing will be carried out. To obtain the alignment of the centers, it is essential to use broaches with the length indicated in the table. The broaching head is adjusted in the factory, so the operator does not have to make any setting.
It can be used on lathes, machining centers and drills. If it is mounted on lathes, its operation involves the rotation of both the workpiece and the front part of the tool holder, while the body of the broaching head remains stationary. In the machining centers, both the piece and the front part of the tool holder will be stationary, while the body of the broaching head will rotate. The rotation speed and advancement are determined by the hardness of the material and the size of the hole. See summary tables on page 558.
Morse Taper Shank
VDI Shank
Straight Shank
p. 604
p. 524
p. 557
STRAIGHT SHANK BROACHING TOOLHOLDERS
P
G
S
L
H
COD.
d
D
P
L
H
G
d2
d3
S
2312
16,00 19,05 20,00 25,00 25,40 32,00 40,00
8
18 25 25 25 25 25 25
35 40 40 45 45 50 50
42
10 16 16 21 21 21 21
22 30 30 42 42 42 42
50 53 53 68 68 68 68
30 36 36 44 44 44 44
2448 1680 1707 2450 2709 2712
12 12 16 16 16 16
51 51
76 76 76 76
For the right broaching toolholder working is important to respect broach P dimension
REDUCTION FOR BROACH SEAT FROM 16 TO 12 SHANK
COD.
d
D
G
2351
16
12
20,5
Attention: reduction can be used only with broach having P=25
G
P=25
BROACHES
557
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