Involute gear hobs
Involute gear hobs according to ČSN 22 2551
Pressure angle | 20° |
Module | 1-8 |
ČSN 22 2551 | KHSS-E, PM |
ČSN 22 2551.1 | with TiN coating |

Module | Da0 | d | L | x | Number of flutes |
---|---|---|---|---|---|
1 1,25 1,5 1,75 2 2.25 2,5 2,75 3 3,25 3,5 3,75 4 4.5 5 5,5 6 6,5 7 8 | 50 50 63 63 63 71 71 71 80 80 80 90 90 90 100 112 112 118 118 125 | 22 22 27 27 27 27 27 27 32 32 32 32 32 32 32 40 40 40 40 40 | 32 40 50 50 50 56 63 63 71 71 71 80 80 90 100 112 112 118 125 132 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 | 14 14 12 12 12 12 12 12 12 12 12 12 12 10 10 10 10 10 10 10 |
Teeth profile according to ČSN 22 2501.
Accuracy Class A, B according to DIN 3968, up to module 6 accuracy class AA.
On the special order is the possibility of delivery of double or triple start hobs.
The hobs are delivered also with different PVD coating.
Involute gear hobs according to DIN 8002
Pressure angle | 20°, 15° |
Module | 1-8 |
DIN 8002 B | KHSS-E, PM |

Module | Da0 | d | L | x | Number of flutes |
---|---|---|---|---|---|
1 1,25 1,5 1,75 2 2.25 2,5 2,75 3 3,25 3,5 3,75 4 4.5 5 5,5 6 6,5 7 8 | 50 50 63 63 63 71 71 71 80 80 80 90 90 90 100 112 112 118 118 125 | 22 22 27 27 27 27 27 27 32 32 32 32 32 32 32 40 40 40 40 40 | 32 40 50 50 50 56 63 63 71 71 71 80 80 90 100 112 112 118 125 132 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 | 14 14 12 12 12 12 12 12 12 12 12 12 12 10 10 10 10 10 10 10 |
Teeth profile according to DIN 3972.
Accuracy Class A, B according to DIN 3968, up to module 6 accuracy class AA.
On the special order is the possibility of delivery of double or triple start hobs.
The hobs are delivered also with different PVD coating.