Power transmission

We are direct suppliers of products made by SKF and the German company DESCH Antriebstechnik GmbH, Arnsberg in the field of power transmission, such as elastic and fixed couplings, belt pulleys, plain bearings, Taper clamp casings, etc.

Power transmission forms a complex group of product ranges linked by performance transmission, especially in rotary applications. The most commonly used devices are belt and chain drives and shaft joints.
A suitably selected power transmission allows these forces to be controlled and changed in given drives.
Generally, based on the motion type, they may be described as circular drives.

Circular drives are mechanisms intended for circular motion transmission. According to their purpose they may either "reduce" or "increase engine revolutions". If a single engine drives more mechanisms with various revolutions (i.e. with various frequencies), suitable circular drives must be used. The most simple is a single-stage drive consisting of two transmission wheels which may be in:

  • direct contact- frictional, cogged

  • indirect contact - belt, chain

Division, structural design

Belt drives
These are used for the transmission of low to medium outputs from the drive shaft to one or more driven shafts, while the shafts are mostly parallel. They are used in applications where the distances between the shafts are large, preventing the use of direct drives.
Their advantages include: high peripheral speed (up to with V-belts, up to with flat belt), elastic stroke, quiet operation, vibration dampening, cheap manufacture, and easy maintenance. Disadvantages include varying gear ration, necessary significant pretightening of the flat belt, the occurrence of static electricity and problems related to conducting it away. Antistatic versions of the belts may be used for this purpose.
Belt slipping may be prevented by placing the shafts exactly parallel and belt pulleys exactly opposite to each other. Therefore it is better to use two V-belts placed in a groove. Moreover, with the use of the V-groove the friction force will increase and the belt does not need to be overstretched.

Chain drives
Chain drives are used for the transmission of low to medium outputs to parallel shafts located not too far away.
Advantages: precise gear ratio, no pretightening required (thus less stress on bearings), suitable for both small and large axial distances, dampening impacts by bending their unloaded section. This means that the best working position is horizontal or inclined (not vertical).
Disadvantages: used only for parallel shafts, uneven operation with a chain wheel with a low number of teeth, necessary additional tightening from time to time.

Frictional drives
Intended for the transmission of low to medium torsion moments. Frictional force created by the press force must be at least equal to peripheral force (caused by the torsion moment). Used where wheel slipping may occur due to overloading, or where a smooth change of revolutions is required.

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