Industrial Gearbox Selection: Prepare the Evidence First

A useful gearbox enquiry connects the drive to the machine it will operate. The model name and motor power help start the conversation, but they do not describe the complete installation or operating requirement.

You do not need every answer before making contact. Send the information you have, identify what is unknown and explain whether you are replacing an installed drive or developing a new machine.

Start with the machine and the reason for the enquiry

Name the driven equipment: for example, a conveyor, mixer, pump or packaging machine. Explain what it does and why a gearbox review is needed. An existing unit may have failed, the production process may have changed, or a new machine may need its first drive assembly.

These are different starting points. A unit that fits the previous mounting space may still need an application review if the load, operating hours or process has changed. Include the reason for replacement instead of asking only for the former model.

Prepare the operating information you know

Use the following checklist to organise the enquiry. Mark uncertain values as unknown rather than estimating them to complete the list.

If you do not have a torque calculation, describe the equipment and provide the operating information available to you. A motor-power value alone should not be used to invent a missing output requirement.

The equipment load-class reference can help describe a catalogue equipment category. Its classification is a starting reference, not a substitute for reviewing the actual machine and its duty.

For a replacement, show the installed arrangement

Photograph the nameplate clearly and include the complete drive in its installation context. Show the connection to the driven equipment and explain any obstruction around the motor, output shaft or mounting face. Add an existing drawing where available.

Foot, flange and shaft-mounted arrangements require different interface checks. The published forms in the mounting comparison below link to the relevant product series. Use those routes to identify the arrangement, then confirm the dimensions against the installation.

A series designation does not establish flange geometry, shaft dimensions or mounting-hole positions. If the previous unit has leaked, overheated or suffered another recurring problem, describe what was observed and when it occurred.

Start with the installation arrangement

The product name only starts the discussion. It does not establish the mounting face, shaft interface, housing orientation, surrounding clearance or operating duty at the machine.

Mounting	Existing series routes and published forms
Foot-mounted	R series R is the basic foot-mounted form. S series S is the standard foot-mounted arrangement.
Flange-mounted	R series RF is the flange-mounted form. S series SAF is flange-mounted F series FAF is flange-mounted K series KAF and KF cover flange-oriented variants
Shaft-mounted	F series FA is shaft-mounted K series KA identifies shaft-mounted use S series SA is shaft-mounted
Vertical	Vertical cycloidal reducers A vertical arrangement can change access, shaft support, mounting surface, surrounding clearance and service planning.

For a new machine, describe the planned interface

Share the machine purpose, proposed drive arrangement, mounting orientation, motor requirement and available layout drawing. Explain the space around the drive and how it will be reached for inspection.

Where the gearbox and motor are required together, describe the assembly as a whole. The mechanical interface and the machine duty belong in the same enquiry, even when different people provide the information.

Include any OEM identification requirement.

Send the available evidence and identify the gaps

Keep the initial message straightforward: what the machine does, what is known, what has changed and what still needs confirmation. General guidance helps organise that conversation; it does not confirm a final configuration or direct interchangeability.

For an installed gearbox with a readable nameplate, send your nameplate. For a new machine, a missing nameplate or an unreadable plate, use the contact page and describe the application.