Precision Turn-Mill Compound Transmission Shaft Assembly

This shaft assembly features splines, multi-step diameters, and lateral through-holes, integrating rotational and planar machining via turn-mill compound processes. Typically serving as the core power transmission component in automation equipment or precision instruments, it transmits torque through external splines and forms rigid connections with gears or couplings via end threads or positioning holes.

Key machining priorities include ensuring spline profile accuracy, coaxiality across multiple outer diameters, and the positional tolerance of side holes relative to the shaft axis. For the slender structure and complex feature distribution shown, high-precision CNC Swiss-type lathes or turn-mill centers are used for single-setup machining. This eliminates cumulative errors from multiple setups and strictly controls deformation risks in thin-walled areas, ensuring smooth rotation after assembly.

Leveraging our Dongguan facility's capabilities in turn-mill compound machining and multi-axis linkage, we accept non-standard custom orders for high-strength materials such as stainless steel and alloy steel. Our production process employs Coordinate Measuring Machines (CMM) for 100% inspection of critical mating dimensions. We support flexible modes from single-piece prototyping to bulk delivery. Please provide 2D/3D drawings specifying tolerance grades and surface roughness requirements to facilitate toolpath planning and heat treatment solutions.