[Header: High-Torque Damping & National Standard Compliance: LM / ML Series Plum Flexible Coupling]

The Apexcoupling LM / ML Series (GB/T5272-2002 Standard) Plum-Shaped Elastic Coupling is engineered for medium-speed, high-reliability mechanical shaft drives. Constructed from premium S45C (45#) carbon steel and paired with wear-resistant polyurethane elastic spider inserts, this jaw-style coupling compensates for relative shaft offsets while absorbing operational shocks and vibrations.

Designed to replace older GB5272-85 standards, the LM/ML series features a low rotational inertia profile and supports nominal torque transmission from 16 N·m up to 25,000 N·m across working temperatures between -35°C and +80°C. Equipped with standardized keyway mounting options, it is widely utilized for connecting electric motors, industrial water pumps, gearboxes, and automated machinery experiencing frequent starts, stops, and reversing rotations.

[Core Product Advantages / Unique Selling Points]

• National Standard Compliance: Manufactured in strict accordance with GB/T5272-2002 (replacing GB5272-85) for seamless interchangeability.

• High-Strength S45C Steel Construction: Hubs are forged from premium S45C (45#) round steel, delivering high durability and deformation resistance under load.

• Polyurethane Elastic Spider Insert: Damps mechanical vibration, buffers impact loads, and compensates for minor angular ($0.5^\circ$) and parallel ($0.05\text{ mm}$) misalignments.

• Low Rotational Inertia: Compact structure optimized to minimize dynamic rotational inertia, enabling smooth acceleration up to 15,300 RPM.

• Standard Keyway Locking: Precision keyway bore configurations ensure positive, slip-free torque transfer for electric motors and pump drives.

• Lubrication-Free Operation: Requires no ongoing lubrication, reducing maintenance downtime and operating costs.

• Versatile Shaft Hole Configurations: Supports multiple shaft hole profiles including Y (long cylindrical), J/J1 (short cylindrical), and Z (short conical with counterbore).

• Factory-Direct Customization: Direct manufacturing support with stock available for custom keyways, special bore combinations, and OEM/ODM/OBM requirements.

[Technical Specifications Table]