Precision Spline Shaft and Gear Transmission Assembly

This assembly, comprising a stepped shaft with internal and external splines and an externally meshing gear profile paired with a sleeve, serves as a core connection unit in mechanical power transmission systems. The central shaft establishes axial positioning references through multi-stage steps, while the outer circumference features standard involute tooth profiles for torque transmission. The spline structures at both ends of the shaft and within the sleeve ensure high-strength circumferential fixation and synchronous rotation. This component is commonly used in reduction mechanisms of automation equipment, servo motor outputs, and transmission modules of precision instruments, ensuring stable power transmission under frequent start-stop conditions.

Manufacturing relies on CNC turning combined with hobbing or shaping processes. Key controls include the symmetry of spline flanks, dimensional tolerances of the gear pitch circle, and the coaxiality of each step relative to the central axis, preventing excessive meshing clearance or transmission jamming after assembly. To address the high hardness of metal materials, cutting parameters are optimized to suppress deformation during slender shaft machining. Fine deburring is performed on tooth roots and shaft shoulders to eliminate sharp edges for operational safety. For spline fits with tight tolerances, outer diameter tolerance bands are strictly controlled to ensure smooth insertion and removal without looseness.

Equipped with high-precision CNC lathes, machining centers, and Coordinate Measuring Machines (CMM), we support non-standard customization based on 2D/3D drawings for materials (such as stainless steel, carbon steel, and alloy steel), module standards, and surface treatments. Adhering to the ISO 9001 quality management system, our production process covers material traceability, go/no-go gauge inspection of critical dimensions, and 100% visual inspection. We provide material certificates and inspection reports, ensuring that batch-delivered products meet the stringent standards for fit accuracy and wear resistance required by mechanical manufacturing, semiconductor equipment, and high-end automated production lines.