Type H – Hypoid gearboxes

The axles intersect in the gearbox at the distance A in an angle of 90°.

The edge length of the housing is reflected in the gearbox size (example: H 090: the housing edge length is 90 mm, with the viewing direction towards the output side of the gearbox).
The housings are made of aluminium, the shaft suspension units are made of steel or casting.

Dynamic axial-offset gearboxes

Hypoid gearboxes are highly precise and powerful axial-offset gearboxes. These dynamic gearboxes cope with today’s high requirements in every respect. They are both powerful and compact. It is not without reason that they are used worldwide, inter alia, in robotics and for highly dynamic applications. In everyday language, hypoid gearboxes are also known as bevel-gear axle drives.

Product features

  • Dynamic, powerful, compact
  • Housing made of aluminium
  • Hypoid gear sets
  • Axial offset between drive and output
  • Maintenance-free

Application examples

  • Robotics
  • Machine tools
  • Positioning drives
  • Highly dynamic applications
  • Printing machines


ATEK hypoid gearboxes have gear sets with high-quality hypoid toothing made of hardened carburised steel.
A gear set comprises one pinion shaft (small number of teeth / small diameter) and one bevel gear (large number of teeth / large diameter).
Gear sets with spiral toothing offer the advantage of very favourable engagement factors (high meshing ratio).
Therefore they are predestined for usage with high loads.
On hypoid gear sets, the axial offset between pinion shaft and gear results in higher sliding motion rates in the tooth contact.
This makes it possible to achieve especially great running smoothness and a high transmission accuracy.

Construction types

Due to the modular system, different gearbox construction types can be configured.
The construction types differ in

Construction type consists of:
B0 to E0 1 gear set

The variants differ in the type of the shafts, the rotational direction thereof, and the possibility to use a robot flange interface (B0R and C0R).

Threaded mounting holes

The sides 1 and 2 of the gearboxes are machined and may be used as mounting surfaces.
The flange on side 3 has also threaded mounting holes.
On the sides 5 and 6, fastening can be made via through bores.
You have the following available ordering Options:

Order code Threaded mounting holes are located in the housing surfaces on the gearbox side Threaded mounting holes are located in the flanges on the gearbox side
0 3
9 1, 2 3

Please enquire other mounting options.
The standard version of the mounting / fastening has the order code 9.
Example of order code: H 090 12:1 D0 9.1

Installation position

The gearboxes can be used in all installation positions.
The recommended installation position is the position in which the shafts are horizontal.

These are the installation positions 1 and 2. The installation position is defined by the gearbox side directed downwards during operation and will be indicated by the corresponding gearbox side.
Example of order code for the installation position 1: H 090 12:1 D0 9.1

Shaft designation – allocation to the gearbox sides

The fast-rotating shaft has the speed n1 and is identified by N1.
The hypoid pinion is located on this shaft.
The slowly rotating shaft has the speed n2 and is identified by N2.
The hypoid gear is located on this shaft.
The gearbox sides are identified by the numerals 1 to 6.
(See Figure 4.2.1-1; Gearbox sides)

Preferred direction of rotation

If the clockwise (CW) direction of rotation (viewing direction from shaft end face of the fast-rotating shaft towards the gearbox centre) is selected, a lower noise level is generated.


The achievable efficiency depends on rotational speed, torque, installation position, sealing, and lubricant type.
The efficiency is about 95%.
The efficiency specified relates to the permissible nominal load and is a guidance value for run-in gearboxes at operating temperature with standard sealing.


The H-series gearboxes have lifetime lubrication.

Vent filter

If venting is required (B1 or C1) the gearboxes will be delivered with a vent filter.
The vent bores will be equipped with screw plugs for transport.
The vent filter will be enclosed as a separate item and must be mounted in the intended position prior to commissioning.
An elbow may be required.
Please adhere to the operating instructions!

Low-backlash construction

For low-friction running, the tooth space in the gear set is manufactured larger than the tooth.
When the direction of rotation is changed, this results in a rotation angle until the counter-rotating tooth flanks contact each other.
This rotation angle is called circumferential backlash.

Circumferential backlash, measuring method

The circumferential backlash is measured after the drive shaft (N1) has been fixed.
A force of around 2% of the nominal torque is applied to the output shaft (N2) in both rotational directions.
A tooth backlash will result between the two final positions. This can be measured as rotation angle and is indicated in minutes of arc [arcmin].

Circumferential backlash, type

Ordering option Gear set 090 – 115 140 – 260
/0000 Standard <=5 arcmin <=4 arcmin
/S2 Standard
/S1 Standard
/S0 Special gear set <=3 arcmin <=2 arcmin