Gear Cutting Tools

High-precision rack tooth gang cutters
for tooth racks to module pitch
b 1
20° pressure angle
basic profile I to DIN 3972
with additional grinding slots,
with offset keyways
1 2 3 4
d 2 d 1
KHSS-E EMo5Co5
consecutively numbered as: cutter no. 1, 2, 3, 4
Cat.-No.
Dimensions in mm
2561 relief ground
m d 1 b 1 d 2
Number of
gashes
3 140 9,425 40 20
3,25 10,210
3,5 10,995 18
3,75 11,781
4 150 12,556
4,5 14,137
5 15,708 16
5,5 17,279
6 18,849
6,5 160 20,420 50
7 21,991
8 25,133
9 28,274 14
10 31,416
Rack tooth gang cutters for the simultaneous machining of several tooth gaps are made up of several
single-profile circular-type milling cutters. Through the continual offsetting of the gashes in relation to the
drive slot the individual cutters are successively coming (helically) to the point of cutting addition.
This feature particularly promotes quiet running of the milling machine under heavy chip loads.
To allow regrinding combined in a gang, the individual cutters are provided with an additional closely
tolerated keyway (grinding slot), so that an axially parallel position of the cutting faces on the arbor is
guaranteed.
Rack tooth gang cutters are profile relief ground with parallelly flat lapping of the contact faces.
To improve tool life, these milling cutters are made exclusively of cobalt alloyed super high speed steel.
For extreme precision requirements the tolerances for pitch, flank form, gash spacing, cutting face
position as well as cutting edge concentricity lie within quality grade AA to DIN 3968.
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