Formula → Required Torque (Nm) = Power (kW) × Service Factor × 9549 / RPM
Input Parameters
Required Torque
0
Nm
Service Factor Reference Guide
Machine / Application TypeSF
Centrifugal Pumps, Fans (smooth)1.0
Conveyors (light), Compressors1.25
Crushers, Mills, Heavy machinery1.5
Reciprocating Pumps, Presses1.75
Hoists, Cranes, Heavy shock loads2.0
Rolling mills, Severe shock loads2.5

Click a row to auto-fill the service factor.

Solutions by Coupling Type
Waiting for Input
Coupling overview
Nominal Torque
Nm
Max Bore
mm
○ Awaiting Input

Enter Power, RPM & Service Factor,
then choose a coupling type to see recommendations.

Disclaimer

The Coupling Selection Tool provided on this website is intended solely as a preliminary engineering aid to assist users in identifying potentially suitable Lovejoy coupling solutions based on the information entered. The results generated are indicative and should not be considered a final product recommendation, engineering approval, or design validation.

Coupling selection depends on numerous application-specific factors, including but not limited to transmitted power, torque, speed, service factor, shock loading, misalignment, environmental conditions, shaft dimensions, duty cycle, mounting arrangements, and applicable industry standards. These factors may not be fully captured by the selection tool.

Ringfeder Power Transmission, and their affiliates make no representations or warranties regarding the accuracy, completeness, suitability, or fitness of the selection results for any particular application. Users are responsible for verifying all technical data and ensuring that the selected coupling meets the requirements of their specific operating conditions.

Final coupling selection, sizing, and application suitability should be reviewed and confirmed by qualified engineering personnel or by contacting Lovejoy India technical support before procurement, installation, or operation.

Ringfeder Power Transmission shall not be liable for any direct, indirect, incidental, consequential, or special damages arising from the use of, or reliance upon, the information or recommendations provided by this selection tool.

Specifications, product data, and availability are subject to change without prior notice. Users are encouraged to consult the latest product catalogs, technical documentation, and engineering resources for the most current information.

Generating your report…