Gear Couplings

Gear Couplings

Gear Couplings

Gear Couplings Construction and operating characteristics 

CUMEX standard gear couplings have been designed for the usage in a wide range of industrial applications. High torque capacity and compact design are applicable for many installations where a robust and reliable operation is expected. The couplings compensate radial and angular misalignements as well as axial movements with weak restorative forces. CUMEX standard gear couplings are designed to compensate a max. angular missalignement of 1°. The development of a special gearing guarantees a high torque capacity as well as low backlash and a smooth operation. Standard types can be used in horizontal mounting position. The modular design leads to cost effective solutions and short lead time. Gear couplings are torsionally rigid but they require a backlash and therefore they are not free of clearance. 

The basic type of the gear coupling consists of two hubs and two sleeves. The hubs are provided with special barrelled teeth and the sleeves have straight internal teeth. The sleeves are connected with screw joint and the outer end of the sleeve is provided with a groove to hold an O-ring seal. This O-ring seal prevents loss of lubricant, as well as contamination by dirt and dust. 

The torque is transmitted from one shaft to the other by the gear teeth. A spherical gearing of the hubs allow an angular misalignement with weak restorative forces. Therefore couplings also effectively protect bearings and other elements of the connected machines. 

Standard types KKA, KKB and KKS are designed to connect shafts with a minimum distance between the shaft ends. For higher shaft end distances the coupling types KKV and KKP are available. Thereby it is also possible to connect shafts with costomized shaft end distances. We can supply the length of the intermediate parts according the customer‘s specification. 

The intermediate part of the KKP type is equipped with a tube shaft. This enables a light construction particularly for long shafts and big coupling types.The intermediate part of the KKV type is made as a solid shaft and therefore the diameter of the intermediate part is smaller. 

When high rotation speed and/or long shafts are used, we advise to undertake vibration analyses and dynamic balancing of the drive train. Furthermore we instruct a dynamic balancing of the coupling. This approach shall prevent damages caused by resonaces or imbalance forces. 

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