Precision Bushing With Heart-Shaped Hole

Please provide 2D/3D drawings specifying inner hole dimensions, outer diameter tolerances, and surface roughness requirements to evaluate the machining strategy for this rotational part. This cylindrical structure, featuring a central irregular through-hole, typically serves as a connecting sleeve or positioning element in mechanical transmission systems. The heart-shaped hole on the end face is designed to mate with specific drive pins or provide anti-rotation functionality.

The part body features multi-level steps. The perpendicularity between the end face and outer circle, along with the coaxiality of internal and external contours, are critical for ensuring assembly precision. High-precision CNC lathes are used for forming, with strict control over the profile accuracy of the heart-shaped hole and edge chamfer quality to prevent burrs from hindering smooth insertion of mating parts. For multi-batch deliveries, consistent hole dimensions are ensured to maintain interchangeability.

Leveraging our Ningbo factory's cluster of Taikan and Asus brand machining centers and CNC lathes, we efficiently handle the entire manufacturing process from bar stock cutting to precision turning. We flexibly adjust cutting parameters for different base materials such as stainless steel, carbon steel, or aluminum to optimize surface finish. Combined with inspection equipment like optical projectors and roughness profilometers, we strictly verify key mating dimensions, supporting small-batch, high-mix non-standard custom deliveries based on customer drawings.