Coupling

Industrial Shaft Couplings Manufacturer & OEM Solutions

We manufacture industrial shaft couplings engineered for heavy-duty power transmission, dynamic alignment compensation, and vibration damping. Serving OEM machinery builders and MRO distributors, our facility supplies standardized DIN/ANSI couplings as well as custom-machined units for mining, metallurgical rolling mills, heavy conveyors, and industrial pump systems. Every coupling is produced from ultrasonically tested forged steel or precision-cast alloys, fully CNC-machined to H7 bore tolerances, and dynamic balanced for high-rpm operations.

Product Categories

01/

High-Torque Gear Couplings
Engineered for heavy-duty industrial drives requiring high torque density and angular misalignment capability.
Torque Range: 1,200 Nm to 850,000 Nm
Misalignment Capacity: Up to 1.5 deg per gear mesh
Material Options: 42CrMo4 (AISI 4140) forged steel, heat-treated hub teeth
Key Applications: Steel rolling mills, ball mills, heavy cranes, and mine hoists

02/

Flexible Disc & Diaphragm Couplings
Non-lubricated metallic element couplings designed for high-speed applications where zero backlash and maintenance-free operation are critical.
Torque Range: 300 Nm to 120,000 Nm
Speed Rating: Up to 18,000 RPM (dynamically balanced to ISO 1940 G2.5)
Disc Material: AISI 301 / 304 stainless steel springs
Key Applications: Centrifugal compressors, gas turbines, boiler feed pumps

03/

Jaw & Spider Elastomeric Couplings
Fail-safe, flexible couplings optimized for vibration damping and shock absorption between electric motors and gearboxes.
Torque Range: 15 Nm to 35,000 Nm
Element Materials: NBR (80/92 Shore A), Polyurethane (98 Shore A), Hytrel for high thermal resistance
Bore Range: 6 mm to 200 mm (Metric and Imperial keyways available)
Key Applications: Hydraulic power units, industrial conveyors, air compressors

04/

Rigid Flange & Sleeve Couplings
Precision-bored rigid couplings providing solid shaft connection with zero angular offset for perfectly aligned shafts.
Bore Tolerances: H7 / h6 precision ground bore finish
Material Options: Carbon steel (C45), stainless steel 316, cast iron (GG25)
Key Applications: Vertical pump shafts, line shafting, mixer drives

Technical Specifications

Coupling Type	Max Torque (Nm)	Max Speed (RPM)	Allowable Angular Offset	Standard Bore Tolerance	Operating Temp Range
Gear Coupling (Curved Tooth)	850,000	4,500	1.5 deg	ISO H7 (Metric) / K7 (Imp)	-20 deg C to +120 deg C
Metallic Disc Coupling	120,000	18,000	1.0 deg	ISO H7 / Precision Keyway	-40 deg C to +280 deg C
Flexible Jaw Coupling	35,000	8,500	1.0 deg - 1.3 deg	H7 with DIN 6885/1 Keyway	-30 deg C to +100 deg C
Grid Coupling	140,000	6,000	0.5 deg	ISO H7 / Spline Options	-30 deg C to +110 deg C

Application & Equipment Compatibility

Grinding Mills & Crushers

Gear and grid couplings absorbing torsional shock loads during raw material processing.

Pumps & Compressors

Metallic disc couplings delivering zero-backlash torque transmission for continuous-duty API 610 pumps.

Conveyors & Material Handling

Jaw couplings providing torsional flexibility and electrical insulation on drive motors.

Metallurgical & Rolling Equipment

Heavy forged-steel spindle and gear couplings built for elevated thermal conditions and continuous reversing loads.

Custom Manufacturing & OEM Capabilities

Reverse Engineering: CMM scanning and metallurgical analysis of worn or legacy sample couplings to recreate exact specifications.

Custom Bore & Hub Formats: Taper bores, splined bores (ANSI B92.1 / DIN 5480), keyless locking assemblies, and customized hub lengths.

Material Customization: Alloy steels (42CrMo4, 18CrNiMo7-6), stainless steel (304/316L/17-4PH), and custom surface coatings like zinc phosphate, black oxide, or nickel plating.

CAD/3D Integration: STEP and IGES models supplied within 24 hours to support OEM design engineers during development.

Manufacturing & Quality Control

Raw Material Verification

Ultrasonic flaw detection on raw steel forgings to eliminate internal voids before machining; spectrographic chemical analysis for every material batch.

CNC Machining & Tooth Hobbing

4-axis CNC turning and dedicated gear shaping units achieving AGMA Quality Level 10-12 gear tooth profiles.

Heat Treatment Process

Induction hardening of gear teeth and carburizing to achieve surface hardness of 55 to 60 HRC while maintaining core toughness.

Dynamic Balancing

Two-plane dynamic balancing on computerized balancing machines according to ISO 1940 standards (up to G2.5 for high-speed series).

Dimensional Inspection

CMM measurement of hub alignment, bore dimensions, keyway concentricity, and tooth profile accuracy. Mill Test Certificates (EN 10204 3.1) accompanying all shipments.

Spare Parts & After-Sales Support

Replacement Elastomeric Elements: Spider inserts in multiple durometers (80 Shore A, 92 Shore A, 98 Shore A) for jaw couplings.

Disc Packs & Fasteners: Stainless steel flexible disc assemblies and calibrated high-tensile bolt sets.

Seals & Lubrication Accessories: O-ring seals, synthetic grease kits, and high-temperature gasket sets for gear and grid couplings.

MRO Drop-In Replacement: Dimensional matching to standard European and North American coupling footprints for seamless retrofit without re-positioning drive equipment.

Packaging & Delivery

Surface Protection

Anti-rust oil coating and VCI (Vapor Corrosion Inhibitor) film wrapping on all machined surfaces.

Export Packaging

Heavy-duty ISPM 15 compliant wooden crates with internal shock-absorbing padding to prevent transit damage.

Shipping Options

Air freight for emergency MRO requests; sea freight (FCL/LCL) for scheduled OEM volume orders.

Traceability

Laser-etched part numbers, batch numbers, and key dimensions on every coupling hub for easy installation identification.

Procurement Process

Technical Inquiry

Submit your required power/torque rating, shaft diameters, keyway dimensions, operating RPM, and space envelope constraints.

Technical Review & Drawing Confirmation

Our engineering team verifies parameters, generates 2D/3D approval drawings, and provides a formal quotation within 24 hours.

Sample & Production Approval

Sample production for OEM verification, followed by mass manufacturing upon technical sign-off.

In-Process Testing & Inspection

Machining, heat treatment, and dynamic balancing completed with full QA reporting (3.1 inspection certificate provided).

Packaging & Logistics Dispatch

Secure export packaging with tracking, documentation, and customs clearance support provided.

Our Factory

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Q: How do I select the correct coupling size for my drive system?

A: Coupling selection depends on service factor, nominal motor torque, maximum operating RPM, and shaft diameters. Multiply the motor's rated torque by the application service factor (typically 1.25 to 3.0 depending on shock load severity) to establish the required nominal torque rating. Verify that maximum allowable bore sizes accommodate both driving and driven shafts.

Q: Can your couplings directly replace standard European or North American brands?

A: Yes. Our couplings conform to ISO, DIN, and ANSI mounting standards. We regularly supply drop-in replacements with matching shaft center distances, hub lengths, bolt circle diameters, and keyway dimensions, eliminating the need to modify existing motors or gearboxes.

Q: What shaft bore tolerances and keyways do you supply as standard?

A: Standard bores are machined to ISO H7 tolerance with DIN 6885/1 standard keyways for metric shafts. For imperial shafts, we machine to ANSI B17.1 specifications. Splined bores (DIN 5480, ANSI B92.1) and keyless clamping hubs are also available.

Q: What documentation is supplied with custom or OEM coupling orders?

A: Standard shipments include a Material Test Report (EN 10204 3.1 certificate), Dimensional Inspection Report, Dynamic Balancing Certificate (where applicable), and Heat Treatment Log upon request.

Q: What lead times can we expect for standard versus custom couplings?

A: Standard bore and keyway couplings ship from stock or within 7 to 10 days. Custom machined, high-torque gear, or specialized alloy couplings typical lead times range from 3 to 4 weeks depending on raw material forging and heat treatment cycles.

Q: How do flexible jaw element durometers affect system performance?

A: Lower hardness elements (e.g., 80 Shore A) provide greater shock absorption and vibration damping but lower torque capacity. Higher hardness elements (e.g., 98 Shore A or Polyurethane) offer increased torque density and torsional stiffness with reduced damping capability. Selection depends on motor start/stop frequency and driven equipment inertia.

We are one of the most professional coupling manufacturers and suppliers in China, featured by quality products and good service. Please rest assured to wholesale customized coupling at competitive price from our factory. Contact us for more details.

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