Source Factory CNC Precision Machined Plum Coupling With Polyurethane Spider, High Torque & High Speed, Custom Non-Standard Bore Spacing

A mechanical transmission component designed to connect two shafts and transmit torque. The assembly consists of two metal hubs with keyway bores and a central red polyurethane (PU) elastic spider. This three-piece structure utilizes the compression deformation of the elastomer to absorb installation errors, dampen vibrations, and compensate for axial, radial, and angular misalignments. It is commonly used for power transmission connections between servo motors and lead screws, or pump shafts and drive shafts, ensuring smooth operation under frequent start-stop conditions or high-speed rotation.

The manufacturing process involves CNC turn-mill composite machining for metal parts and molding/assembly for the elastomer. Key quality controls for the metal hubs include central bore diameter tolerance, keyway width symmetry, and parallelism of both end faces to ensure tight fit with the shaft system and effective torque transmission. The positional accuracy of the tightening screw holes on the side walls directly affects the uniform distribution of clamping force, preventing loosening or eccentric wear caused by uneven loading. For the elastic spider, hardness consistency and dimensional precision are strictly controlled to ensure a gap-free fit within the metal hubs and uniform stress distribution.

Equipped with high-precision CNC lathes, machining centers, and injection/molding equipment, our factory supports non-standard customization based on 2D/3D drawings. Options include metal materials (such as aluminum alloy, stainless steel, carbon steel), bore specifications, keyway standards, and elastomer colors. Adhering to the ISO 9001 quality management system, our production process covers material traceability, go/no-go gauge inspection for critical dimensions, and assembly coaxiality verification. We provide material certificates and inspection reports to ensure that batch-delivered products meet the stringent standards for torsional stiffness and durability required by the automation equipment, CNC machine tools, and precision instrument industries.