XL Series Star-Type High-Strength Steel Flexible Jaw Coupling

Precision Plum Blossom Shaft Coupler for Electric Motors & Water Pumps (Rotex Interchangeable)

The XL Series Star-Type Steel Coupling is a high-torque, heavy-duty flexible shaft coupler engineered as a direct replacement and interchangeable solution for standard Rotex jaw couplings. Built with solid No. 45 forged steel hubs featuring a corrosion-resistant blackened surface treatment and an elastic polyurethane star-type spider pad, this coupling delivers superior dynamic balancing, excellent impact absorption, and long-term durability under heavy motor dynamic loads. Ideal for industrial water pumps, hydraulic systems, and electric drive motors, the XL series ensures precise transmission with minimal maintenance.

Key Advantages & Features

• Premium No. 45 Steel Construction: Manufactured from solid, high-density No. 45 carbon steel with no internal porosity or impurities, providing enhanced hardness and high torque-bearing capacity compared to ordinary cast iron.
• Corrosion-Resistant Blackened Finish: Black oxide surface treatment protects the steel hub against oxidation, industrial oil splash, and atmospheric rust.
• Rotex Interchangeable Design: Standardized claw jaw dimensions allow direct drop-in replacement for standard Rotex spider couplings in industrial machinery.
• High-Precision H7 Inner Bore: Inner shaft bores are strictly machined within H7 tolerance limits, ensuring concentric shaft alignment, reduced vibration, and firm clamping.
• Shock-Absorbing Polyurethane Pad: Highly durable PU spider cushion pad effectively dampens drive vibration, absorbs peak torque shocks, and extends machine bearing lifespan.
• Non-Standard Customization Available: Supported with custom bore sizes, special keyway configurations, and custom dimensions tailored to OEM client drawings.

Technical Specifications

Applications & Machinery Compatibility

The XL star-type steel flexible coupling is widely used across heavy-duty industrial drive systems requiring high concentricity and vibration reduction, including:

• Water Pumps & Fluid Handling: Industrial water pumps, centrifugal pumps, hydraulic oil pumps, and sewage transfer units.
• Electric Motor Drives: Heavy AC/DC motors, gearboxes, blowers, and compressor drives.
• General Industrial Machinery: Conveyor systems, mixers, mining equipment, and agricultural machinery.
• Rotex System Replacements: Quick and cost-effective direct replacement for worn Rotex brand spider couplings.

Custom Sizing & OEM Support

At ApexCoupling, as a direct manufacturer, we maintain large stock quantities of standard sizes while offering fast turnaround for non-standard custom orders.

Custom Options Include:

• Custom metric and inch inner shaft bore diameters (starting from 6 mm upwards).
• DIN, JIS, and ANSI standard keyway machining.
• Custom spider element shore hardness levels and colors.
• Special surface platings, laser logo etching, and custom OEM packaging.

To request a fast quote, please provide your required XL model size, shaft bore diameters (d1 x d2), keyway specifications, and order quantity.

How to Order / Get a Fast Quote

Looking for reliable XL star-type steel flexible couplings or custom Rotex replacement shaft couplers? Contact our engineering sales team today!

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