Coupling

Industrial Couplings for Power Transmission & OEM Applications

Shenyang Muren Machinery manufactures industrial couplings for heavy-duty power transmission, OEM equipment and MRO replacement. Our range covers gear, grid, disc, diaphragm, elastomeric and rigid shaft connection couplings, with standard and customized bore, keyway, spline and hub configurations.

Torque

Up to 850,000 Nm

Up to 18,000 rpm

Connections

Bore, keyway, spline and taper options.

Applications

Mills, crushers, conveyors, compressors and cranes.

Coupling Technical Specifications

Actual torque, speed and misalignment limits depend on coupling size, configuration and operating conditions. Final ratings are confirmed during engineering review.

Coupling Type	Max. Torque	Max. Speed	Angular Misalignment	Typical Connection	Typical Applications
Gear	Up to 850,000 Nm	4,500 rpm	Up to 1.5°	H7 / K7	Mills, crushers, cranes
Metallic Disc	Up to 120,000 Nm	18,000 rpm	Up to 1.0°	H7 / keyway	Compressors, turbines
Flexible Jaw	Up to 35,000 Nm	8,500 rpm	1.0–1.3°	H7 / DIN 6885	Motors, gearboxes
Grid	Up to 140,000 Nm	6,000 rpm	Up to 0.5°	H7 / spline options	Conveyors, heavy drives

Coupling Product Range

Heavy-Duty Gear & Grid Couplings

Designed for high-torque drives, shock loads and reversing loads in heavy industrial equipment.
Typical applications: Mills · Crushers · Cranes · Heavy Conveyors.

Disc & Diaphragm Couplings

Used for high-speed rotating equipment where low backlash, controlled misalignment compensation and dynamic balance are important.
Typical applications: Compressors · Turbines · Boiler Feed Pumps.

Flexible Elastomeric Couplings

Used where vibration and shock damping are required between motors, gearboxes and driven equipment.
Typical applications: Motors · Gearboxes · Conveyors · Hydraulic Power Units.

Rigid & Shaft Connection Couplings

Used for direct shaft connection where bore, hub and mounting dimensions must match the existing equipment.
Typical applications: OEM machinery · Shaft assemblies · Custom drive systems.

Coupling Selection Guide

Application Requirement	Suitable Coupling	Main Parameters to Confirm
High torque / shock load	Gear / Grid	Torque, peak load, RPM
High-speed operation	Disc / Diaphragm	RPM, balance, misalignment
Vibration damping	Jaw / Tyre	Torque, speed, damping requirement
Frequent starts/stops	Elastomeric	Start frequency, torque, temperature
Existing coupling replacement	Replacement coupling	Bore, keyway, hub, envelope
Rigid shaft connection	Flange / Sleeve	Shaft diameter, bolt pattern

Shaft, Bore & Connection Compatibility

Standard Connections

Metric and imperial bores
H7 precision bores
DIN 6885 keyways
ANSI B17.1 keyways
DIN 5480 splines
ANSI B92.1 splines
Taper bores
Keyless locking assemblies

Dimensions to Confirm

Shaft diameter
Bore tolerance
Keyway or spline profile
Hub length
Bolt pattern
Available installation space

Coupling Engineering Review

Coupling selection is reviewed against the actual operating conditions before production.

01/

Review Parameters
Torque and peak load
Operating speed
Shaft and connection
Angular / axial misalignment
Start-stop frequency
Shock or reversing loads
Installation space
Service conditions

02/

Engineering Output
Coupling type
Coupling size
Bore and keyway configuration
Hub dimensions
Material / heat-treatment requirements
Balancing requirements

OEM Custom Coupling Manufacturing

Custom Dimensions
Bore diameter and tolerance
Hub length and outside diameter
Overall coupling envelope
Bolt circle
Customized mounting dimensions

Custom Shaft Connections
Keyways
Splines
Taper connections
Customized hub configurations

Engineering Data
2D manufacturing drawings
STEP / IGES models
Drawing-based production
Customized connection dimensions

Manufacturing Basis
Load → Speed → Connection → Service Conditions

Coupling Materials

Material selection depends on coupling design, load, speed and service conditions.

Material	Typical Use
C45	General mechanical components
42CrMo4	High-strength coupling components
18CrNiMo7-6	Carburized gear components
304 / 316L	Corrosive environments
17-4PH	High-strength stainless applications

Manufacturing & Quality Control

Material Verification

Chemical composition
UT where applicable
Material certificates

Precision Machining

CNC turning
Precision boring
Gear machining
Keyway machining

Heat Treatment

Induction hardening
Carburizing
Hardness inspection

Dynamic Balancing

Two-plane balancing
ISO 21940
G2.5 where applicable

Final Inspection

CMM
Bore/hub alignment
Keyway concentricity
Gear tooth profile

Coupling Replacement & MRO Support

Replacement Approach

Existing Coupling	Requirement	Replacement Solution
Gear coupling	No shaft modification	Reverse-engineered hub and bore
Disc coupling	High-speed operation	Disc pack + dynamic balancing
Grid coupling	Shock load	Dimension-matched grid coupling

Typical Replacement Case

Application: Heavy-duty drive
Requirement: Replace an existing gear coupling without shaft modification
Input: Physical sample + shaft-end dimensions
Solution: Reverse-engineered bore, keyway, hub length and installation envelope
Result: Replacement coupling matched to the existing shaft arrangement

Replacement Parts

Spider elements
Disc packs
Replacement hubs
Fasteners
Seals
Lubrication accessories
Complete assemblies

Packaging, Traceability & Delivery

Corrosion protection

Anti-rust treatment and VCI protection for machined surfaces.

Export packaging

ISPM 15-compliant wooden crates.

Traceability

Part and batch identification where required.

Delivery

Sea freight and expedited shipping for urgent MRO orders.

Coupling RFQ Checklist

To recommend and quote the correct coupling, please provide:
Existing coupling type or model
Motor power or transmitted torque
Operating speed
Driving and driven shaft diameters
Bore and keyway dimensions
Shaft center distance
Available installation space
Application and operating conditions
Required quantity
Drawing, photos or physical sample for replacement projects

If Some Information Is Unavailable
Send the available drawing, photos or physical sample for engineering review.

FAQ

Q: When is dynamic balancing required for a coupling?

A: Dynamic balancing is mainly considered for high-speed applications or where the equipment requires controlled residual unbalance. The required balance grade depends on operating speed and coupling configuration.

Q: What should be checked when replacing a coupling without modifying the shaft?

A: Confirm the shaft diameter, bore, keyway or spline, hub length, bolt pattern and available installation space before production.

Q: Can a coupling be supplied as a complete assembly?

A: Yes. Complete coupling assemblies or individual hubs, disc packs, elastomeric elements and other replacement components can be supplied.

Q: What documents are normally available for a coupling order?

A: Depending on the project, documentation may include drawings, datasheets, material certificates, inspection records and balancing reports.

Q: How is the correct coupling size confirmed?

A: Final size is determined from torque, operating speed, shaft connection, misalignment, load characteristics and service conditions.

Q: Can imperial shaft dimensions be accommodated?

A: Yes. Metric and imperial bore configurations can be manufactured, subject to the required bore, keyway or spline dimensions.

Q: What information is useful when the original coupling model is unknown?

A: Photos, shaft dimensions, bore and keyway details, hub dimensions and the equipment application are useful for identification and engineering review.

As one of the most professional coupling manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale durable coupling from our factory. We also accept customized orders.