Torque and service factor
Match catalogue rated torque to motor and driven load with application margin. See the torque selection guide and industrial coupling selection guide.
Industrial Couplings
Industrial couplings including Rexnord Omega, Lifelign, Steelflex, Dodge Industrial D-Flex, Raptor and Sidewinder, Miki Pulley and R+W. Authorised distributor for Regal Rexnord and Dodge Industrial coupling families.
Why couplings matter
Engineering context
Motor-to-driven equipment connection
Couplings connect motor and driven equipment while accommodating misalignment, vibration and maintenance access.
The right type depends on torque, speed, bore size, spacing (close-coupled vs spacer) and whether the flexible element is replaceable in place. Golden Bearing Company supports engineering-led selection across Regal Rexnord, Dodge Industrial, KTR, Miki Pulley and R+W coupling families, with authorised distributor relationships where governed.
Selection inputs
Key selection inputs
- Torque — Rated torque duty with application service factor margin
- Speed — Operating speed and critical speed considerations
- Bore — Shaft bore sizes and hub mounting method
- Spacing — Close-coupled vs spacer (DBSE) for maintenance access
- Configuration — Replaceable flexible element vs lubricated gear designs
Selection guides
Engineering resources that complement the product families below.
Technical resource
Couplings
Coupling selection, technology routing and application guidance.
Technical resource
Industrial Coupling Selection Guide
Practical framework for torque, speed, bore, misalignment, configuration and technology routing.
Technical resource
Elastomeric Coupling Selection Guide
Element types, damping, misalignment and routing to jaw, tire and sleeve elastomeric families.
Technical resource
Disc Coupling Selection Guide
Torsional stiffness, backlash, spacer configuration and routing to RADEX-NC, Servoflex and Thomas disc families.
Technical resource
Bellows Coupling Selection Guide
Precision motion, backlash and routing to TOOLFLEX S and R+W bellows families.
Technical resource
Coupling Torque Selection: Rated vs Peak
Continuous vs peak torque, service factor context and catalogue selection workflow.
Technical resource
Coupling Misalignment: Angular, Parallel and Axial
Definitions of misalignment modes and technology-level selection context.
Technical resource
Servo and CNC Coupling Selection
Backlash, stiffness and routing to RADEX-NC, Servoflex, TOOLFLEX and R+W families.
Technical resource
Pump and Motor Coupling Applications
Elastomeric pump drive duty, spacer configuration and family routing.
Technical resource
How to Identify an Installed Elastomeric Coupling
Observable construction, markings and data collection for identification without interchange claims.
Major configuration types
Five common flexible coupling architectures used across industrial and precision drive applications.
Configuration type
Elastomeric
Polyurethane or rubber elements for damping and misalignment. Elastomeric selection guide.
Configuration type
Wrap elastomeric
Wrap element seated in hub halves for controlled element replacement.
Configuration type
Gear
Lubricated gear teeth for very high torque industrial duty.
Configuration type
Grid
Spring steel grid element for robust industrial drives.
Configuration type
Disc and composite
Disc pack and composite layouts for defined spacer and maintenance requirements. Disc selection guide.
Configuration type
Bellows
Metal bellows for low-backlash servo and precision drives. Bellows selection guide.
Miki Pulley couplings
Miki Pulley couplings hub - Servoflex, Starflex, Stepflex and Sprflex engineering selection pages.
Manufacturer context
Miki Pulley couplings
Miki Pulley (Japan) manufactures precision flexible couplings for servo, stepper and industrial machinery. Golden Bearing Company is an authorised distributor. Servoflex is a metal disc coupling family; Starflex, Stepflex and Sprflex are elastomeric coupling families.
Miki Pulley
Servoflex
Metal disc couplings (SFC-SA2 and SFC-DA2) for servo and stepper drives with zero backlash.
Miki Pulley
Starflex
Jaw couplings with polyurethane spider elements; ALS-R models published with verified tables.
Miki Pulley
Stepflex
Laminated HNBR rubber element couplings for stepper motor damping.
Miki Pulley
Sprflex
Rubber buffer couplings with aluminium alloy hubs for general flexible duty.
KTR couplings
KTR couplings hub - ROTEX GS, RADEX-NC and TOOLFLEX S engineering selection pages.
Manufacturer context
KTR couplings
KTR Systems manufactures flexible couplings for industrial and precision drive applications. Golden Bearing Company publishes catalogue engineering data for KTR ROTEX GS jaw, RADEX-NC disc and TOOLFLEX S bellows coupling families.
KTR
ROTEX GS
Backlash-free jaw couplings with elastomer spiders. 15 catalogue sizes with torque, bore, speed and spider compatibility data.
KTR
RADEX-NC
All-steel disc couplings for servo drives. 10 catalogue sizes with EK/DK configuration data and DK-configuration torsional stiffness.
KTR
TOOLFLEX S
Metal bellows couplings for servo and precision drives. 9 catalogue sizes with torque, bore, speed, dimensions and torsional stiffness.
Dodge Industrial couplings
Manufacturer context
Dodge Industrial couplings
Dodge Industrial (an RBC Bearings company) manufactures flexible couplings separately from the Regal Rexnord portfolio. Golden Bearing Company is an authorised distributor for Dodge Industrial coupling families — not a manufacturer. See the Dodge couplings hub for family overview.
Dodge Industrial
D-Flex
Sleeve couplings with moulded elastomer elements for general industrial flexible drive duty.
Dodge Industrial
Raptor
Split-tire elastomeric couplings with documented Omega cross-reference for engineering review.
Dodge Industrial
Sidewinder
Wrap elastomeric couplings (5R-80R) with documented Wrapflex interchange context.
How to select a coupling family
Structured decision support for narrowing manufacturer family and configuration before catalogue review.
Configuration
Close-coupled vs spacer (DBSE) for pump and compressor maintenance.
Misalignment
Angular, parallel and axial limits vary by family. See the misalignment guide and confirm against catalogue data.
Maintenance
Replaceable elastomer or grid elements vs lubricated gear designs.
Manufacturer relationship
Regal Rexnord — Authorised Distributor
Dodge Industrial — Authorised Distributor
Miki Pulley — Authorised Distributor
R+W — Dealer & Stockist
Product Families
Rexnord Coupling Families
Omega, Lifelign, Steelflex, Viva, Wrapflex and specialty lines.
View detailsRexnord Omega Elastomeric Couplings
Close-coupled and spacer elastomeric couplings - E-series.
View detailsFalk Lifelign Gear Couplings
Regal Rexnord portfolio - G20 gear coupling family.
View detailsFalk Steelflex Grid Couplings
Regal Rexnord portfolio - T10 grid coupling family.
View detailsDodge Industrial Couplings
D-Flex, Raptor and Sidewinder elastomeric and wrap families.
View detailsDodge D-Flex Couplings
Primary Dodge elastomeric sleeve coupling line.
View detailsDodge Raptor Couplings
Split-tire elastomeric coupling with documented Omega cross-reference.
View detailsDodge Sidewinder Couplings
Wrap elastomeric couplings (5R-80R) with documented Wrapflex interchange.
View detailsMiki Pulley Couplings
Precision servo and industrial flexible couplings.
View detailsR+W Couplings
Bellows, encoder and torque limiter couplings - dealer/stockist.
View detailsCoupling types compared
| Elastomeric (Omega) | Replaceable tire element, AGMA 9002 sizes, pump and fan duty. Rexnord Omega. |
|---|---|
| Elastomeric (Viva) | High-torque-density tire coupling with distinct element geometry. Rexnord Viva. |
| Wrap elastomeric (Wrapflex) | Falk portfolio wrap-type element for general industrial drives. Falk Wrapflex. |
| Elastomeric (D-Flex) | Dodge Industrial sleeve coupling with moulded elastomer elements. Dodge D-Flex. |
| Elastomeric (Raptor) | Dodge split-tire elastomeric coupling with documented Omega cross-reference. Dodge Raptor. |
| Wrap elastomeric (Sidewinder) | Dodge wrap coupling (5R-80R) with documented Wrapflex interchange context. Dodge Sidewinder. |
| Elastomeric (Miki Starflex) | Jaw couplings with polyurethane spider elements for servo and precision duty. Miki Starflex. |
| Elastomeric (Miki Stepflex / Sprflex) | Laminated rubber and buffer elastomer couplings for stepper and general flexible duty. Stepflex and Sprflex. |
| Gear (Lifelign) | High torque, lubricated, mining and steel applications. Falk Lifelign. |
| Grid (Steelflex) | Spring grid element, moderate maintenance. Falk Steelflex. |
| Disc (Miki Servoflex) | Metal disc couplings for servo and stepper positioning duty. Miki Servoflex. |
| Precision flexible (disc) | Servo disc coupling duty. KTR RADEX-NC. |
| Precision flexible (bellows) | Servo bellows coupling duty. KTR TOOLFLEX S and R+W. |
Have a part number or designation?
Send manufacturer part numbers, bore sizes or coupling designations for engineering identification and quotation support. This is an identification/interchange enquiry—not a live stock lookup or availability confirmation.
Common questions
Spacer configurations allow pump maintenance without moving the motor. Rexnord Omega, Viva, Lifelign and some disc families include spacer variants with defined DBSE dimensions. Specify equipment layout when requesting a quote.
For very high torque and heavy industry, compare Lifelign gear and Steelflex grid catalogues. Omega and Viva elastomeric couplings suit general industrial pump and fan duty.
No. Dodge Industrial is an RBC Bearings company. Regal Rexnord coupling families (Omega, Lifelign, Viva, etc.) are separate. Golden Bearing Company holds authorised distributor relationships for both manufacturers independently. See Dodge couplings.
Share motor power or torque, speed, bore sizes, configuration and environment through our engineering enquiry. For Regal Rexnord families, you may also use the Rexnord products inquiry page.
Where to go next
Industrial coupling selection guide
Practical technology routing and selection checklist for motor-driven equipment.
View detailsRexnord coupling families
Authorised distributor overview of Omega, Lifelign, Steelflex, Viva, Wrapflex and specialty lines.
View detailsDodge Industrial couplings
D-Flex, Raptor and Sidewinder elastomeric and wrap families (RBC Bearings company).
View detailsKTR couplings
ROTEX GS jaw and RADEX-NC servo disc coupling families with catalogue engineering data.
View detailsMiki Pulley couplings
Servoflex, Starflex, Stepflex and Sprflex for servo and precision machinery.
View detailsEngineering enquiry
Send duty data, bore sizes and part numbers for quotation support.
View details