Set-Screw Hub
Shaft-hub connection using one or more radially arranged set screws. Cost-effective design for smaller torques, such as miniature couplings. Fitting clearance from 0.01mm to 0.05mm. If possible, avoid damaging the drive shaft with the aluminum ball or flat surface.

Clamping Ring Hub
Easy-to-assemble shaft-hub connection with a radially arranged clamping screw (DIN-ISO 4762-12.9). KG-HS series with two clamping screws in a 180° arrangement for optimal balancing quality. Safe, backlash-free and non-positive transmission of the nominal torque. Standard tolerance of the hub bore D1/D2 is "G6" or "G7". Permissible fitting clearance from 0.01mm to 0.04mm. Generally with an additional EASY Clamp pin for easy disassembly by widening the clamping hub bore.

Keyway connection
Optional upon customer request for shafts with an additional keyway in accordance with DIN6885. On request with surcharge. Groove tolerance “JS9” or “P9” as standard. Due to the positive shaft-hub connection, forced driving is guaranteed.

Half Shell Hub
The half-shell hubs are divided and consist of a fixed and a loose half. The fixed half-shell parts can be placed on the permanently aligned shaft journals. This can make assembly considerably easier, since, for example, there is no need to subsequently move and align the motor shaft. The two clamping screws should be tightened as evenly as possible and the gap dimensions should be checked. Permissible fitting clearance from 0.005mm to 0.04mm. It is essential to check whether the specific coupling dimension "g" is slightly smaller than the frontal shaft distance "A".

Cone Clamping Hub
A backlash-free, non-positive shaft-hub connection using a cone clamping hub ensures the transmission of very large torques, even with small shaft diameters. The rotationally symmetrical structure ensures high balancing qualities and operating speeds. However, the assembly process is complex and cannot be carried out radially. The cone bushing is pressed in axially by tightening several fastening screws (at least 6 pieces) crosswise, if possible several times. Permissible fitting clearance from 0.005mm to 0.02mm. Several extraction threads are provided for the loosening process.

Cone Clamping Ring Hub
A backlash-free, non-positive shaft-hub connection using a cone clamping ring hub ensures the best possible torque transmission and, thanks to the rotationally symmetrical structure, optimal balancing qualities. In addition, there is no axial displacement of the hub during the clamping process. However, the assembly process is complex due to the tightening of the cone clamping ring using several clamping screws and cannot be carried out radially. Permissible fitting clearance from 0.005mm to 0.02mm. Several extraction threads are provided for the loosening process.

Expanding Cone Hub
Expanding cone hub for compact, integrated attachment to a hollow shaft with a short overall length. Simple, axial operation thanks to a centrally located clamping screw. Variable expansion cone pin ØD2 with standard tolerance "g6" for bore tolerance "H7" - please note D2_min or D2_max!

Flange Hub
One-sided or double-sided flange connection according to "DIN-EN-ISO9409-1" or with customer-specific dimensions. Flange connection in one or two-piece design. Very compact variants with a very short overall length and high torsional rigidity are possible.

Torsional rigidity: CTK - [Nm/arcmin] When specifying the specific torsional stiffness values (torsional stiffness) of all coupling series, a change was made from the previous unit specification [1kNm/rad] to the unit “newton meter per angular minute”. This makes it quite easy for the designer to determine the corresponding torsion angle errors based on the operating torque. 60 angular minutes (or arc minutes) correspond to one angular degree. This results in the conversion factor 1 rad ≙ 57.3° ≙ 3438 arcmin. [1Nm/arcmin ≙ 3.44kNm/rad]

The type-specific values can be viewed in the data sheet of the respective coupling.

How large is the required shaft compensation?

The specification +,++,+++ refer to the lateral shaft misalignment, since the axial and angular misalignment are usually rather unproblematic.

The maximum permissible values for the shaft misalignments can be found in the data sheet of the respective coupling.
If the permissible offset values are exceeded, fatigue fractures on the metal bellows or excessive wear of the elastomer spider may occur.

The axial pluggability is achieved by a backlash-free keyway connection in whole metal version (aluminum anodized). For this, one part of the hub is delivered as a conical carrier, the counterpart with a congruent conical keyway.

Very seldomly, metal bellows couplings may have resonance sounds (e.g. a whistling or a humming). A type of coupling with significantly higher torsional stiffness or vibration dampening elastomer couplings should be used here.

Electrically insulating couplings, such as elastomer couplings with their plastic element (spider), are required if no static charge may be passed on.