[Header: Tool-Free Quick-Release Engagement & High-Speed Performance: GR / HR Fast Locking Universal Joint]

The Apexcoupling GR / HR Series Fast Locking Precision Universal Joint is an advanced quick-change cardan coupling engineered for fast tool changes, frequent maintenance disconnections, and high-precision power transmission. Featuring an integrated quick-locking collar mechanism on the d2 hub end, this u-joint allows operators to connect and detach drive shafts instantly without needing special tools or set screws. It is ideal for modern stepper motors, servo systems, and multi-axis machinery where rapid setup and zero-backlash power transfer are critical.

As detailed in the technical parameters in image_bad101.png and image_bad13d.jpg, the series is split into two structural configurations: the standard GR type for general angular transmission and the HR type, which integrates precision needle roller bearings to enable continuous high-speed rotation up to 4000 RPM. Forged from heat-treated 42CrMo quenching steel and 20Cr alloy steel, these joints feature precision H7 bore tolerances, accommodate an inner hole diameter range of 8mm to 30mm, and deliver torque transfer capabilities up to 550 N·m.

[Core Product Advantages / Unique Selling Points]

• Quick-Release Fast Locking Collar: Features a push-pull sleeve mechanism that allows fast, tool-free locking and detachment of the drive shaft, significantly reducing downtime during line changeovers.

• High-Speed HR Needle Roller Bearing Variant: The HR series incorporates needle roller bearings (nmax = 4000 RPM) to handle continuous high-speed operations with minimal heat generation and low vibration.

• H7 Precision Bore Engineering: Finished d2 connection holes are machined to a tight H7 tolerance, supporting DIN6885/1-JS9 standard keyways, pin holes, or JS9/H8 hexagonal bore profiles.

• 30° Maximum Rotation Angle: Accommodates spatial angular misalignments up to 30° per section for flexible drivetrain routing.

• Heat-Treated Alloy Steel Metallurgy: Constructed from quenched 42CrMo steel and 20Cr alloy steel for high fatigue strength, torsional resistance, and shock absorption.

• Wide Torque & Velocity Envelope: Supports allowable torque ranges from 11.2 N·m up to 550 N·m across outer diameters ranging from 16mm to 60mm.

• Multi-Sector Industrial Deployment: Engineered to deliver reliable uptime across Manufacturing Plants, Machinery Repair Shops, Food & Beverage Factories, Printing Shops, Farms, and Energy & Mining.

• Complete OEM / ODM Technical Customization: Supported by direct factory customization pipelines for non-standard lengths, dual-end quick-release sleeves, and custom bore profiles with a 1-year warranty.

[Technical Specifications Table]