DJM / DBN Series 45# Forged Carbon Steel Diaphragm Flexible Coupling

High-Torque Motor Shaft Connector with SUS304 Stainless Steel Elastic Disc Pack & Keyway Bore

The DJM / DBN Series Diaphragm Flexible Coupling is a heavy-duty, high-precision power transmission component designed for demanding industrial machinery, high-torque electric motors, and pumps. Built with high-grade 45# forged carbon steel hubs and a flexible 304 stainless steel annular disc pack, this coupling delivers superior torsional rigidity, smooth operational concentricity, and excellent vibration absorption. Available in both single (DJM) and double (DBN) diaphragm configurations with standard keyway bore machining, it effectively compensates for axial, angular, and radial shaft misalignments without requiring lubrication.

Key Advantages & Features

• 45# Forged Steel Hub Construction: Manufactured from dense, impurity-free 45# round carbon steel, offering significantly higher tensile strength, hardness, and dynamic stability than standard cast iron couplings.
• High-Flexibility 304 Stainless Steel Disc Pack: Utilizes imported ring-shaped or square SUS304 stainless steel diaphragms that maintain high torque transmission with zero backlash while absorbing shock loads and vibrations.
• Single & Double Disc Configurations: Single disc (DJM style) provides high angular stiffness for compact layouts, while double disc (DBN style) with intermediate spacer provides superior radial and parallel misalignment compensation.
• Precision Integrated CNC Machining: Advanced manufacturing ensures strict H7 inner bore concentricity, high dynamic balance, and reduced runout at high rotational speeds.
• Oil-Resistant & Anti-Corrosion Finish: Coated protective surface finish resists industrial oil contamination, chemical splash, and environmental rust for long operational lifespan.
• Maintenance-Free Design: Non-lubricated diaphragm structure eliminates wear parts, providing smooth, long-lasting performance with zero maintenance downtime.

Technical Specifications

Applications & Machinery Compatibility

The DJM/DBN steel diaphragm coupling is engineered to handle heavy dynamic loads, high speeds, and intense torque spikes across various heavy industrial drive lines, including:

• Heavy Electric Motors & Generators: Large industrial AC/DC motors, servo drives, and power generation units.
• Pumps & Compressors: Centrifugal water pumps, chemical metering pumps, screw compressors, and industrial blowers.
• CNC Machinery & Heavy Automation: High-precision machine tool main shafts, heavy CNC gantries, and automated conveyors.
• Processing & Mining Machinery: Metallurgical drive lines, papermaking equipment, textile machinery, and mixers.

Custom Sizing & OEM Support

At ApexCoupling, as a direct manufacturer, we provide complete custom machining, non-standard dimensional options, and OEM supply based on customer technical drawings.

Custom Options Include:

• Custom metric and imperial inner bore sizes up to 85 mm.
• DIN, JIS, and ANSI standard keyway dimensions and double keyway configurations.
• Custom outer diameters, overall lengths, and spacer sleeve distances.
• Special surface plating, laser etching, and custom brand packaging.

To request a fast quotation, please specify your required DJM or DBN model size, outer diameter, inner shaft bore diameters with keyway specs, motor power/torque ratings, and required quantity.

How to Order / Get a Fast Quote

Looking for high-torque DJM / DBN steel diaphragm flexible couplings or custom motor shaft connectors? Contact our engineering sales team today!

• Email: ella@apexcoupling.com
• WhatsApp / WeChat: +86 13437856962
• Website: www.apexcoupling.com
• MOQ: 1 Piece (Sample orders, batch orders, and OEM custom supplies fully supported)