Design and Selection Criteria

There is a set of questions that has been developed to gain the necessary information to adequately design a gearbox for a specific application. These are presented to the client and based on the answers the selection is made.

Referring to the data sheet for a quotation:

The first section gains information about the operating conditions and applications. This would influence the 'service factor' (SF) that would be allowable. The harsher the predicted operating conditions the higher the SF. There are standard 'SF' ratings for specific applications based on experience and research.

• The second section deals with physical requirements for the reducer in terms of reduction ratio etc.

• The third section involves the driving mechanism, diesel or electrical motor, etc.

• In section four the coupling between the reducer and the motor is discussed.

• Section five handles the method of gearbox to load connection, for example solid or chain connection.

• Point six defines the overhung loads applied to the output shaft of the reducer. 

• Brakes are discussed in section seven. The magnitude of braking could have an effect on the life of the gearbox.

• Operational parameters regarding temperatures and ventilation are identified in section eight. This would identify the need for forced cooling or oil cooling.

With these aspects of the application identified, a gearbox can be specified.

The gearboxes are designed to comply with recommendations from AGMA, DIN and ISO standards. The listed Hansen catalogue ratings are calculated according to the AGMA standard.