TURSTED BY INDUSTURRY LEADERS
Ruizheng Precison Machinery are proud to have supported projects and manufacturing needs for customers and partners across the automotive, industrial automation, robotics, power tools, HVAC, construction equipment, and UAV industries.
Haas · Bosch · Hitachi · MISUMI · Daikin · ABB · JCB · FANUC · KAMAZ · Leapmotor · DEWALT · Midea · KUKA · GMCC · Haozhi · EngineAI · Diamex
Our custom fabricated products
Ruizheng provide CNC machining and customized production services for shaft parts in various industries. Here are the products and services we can customize.

Spindle Part
Spindle Part is the core component used to transmit power and support rotational motion in mechanical equipment. It is widely used in machine tools, lathes, grinders, automobile manufacturing, semiconductor equipment, aerospace and other fields. The precision of Spindle Part produced by our factory can reach 0.002mm, and the concentricity can reach 0.001mm.

Step Shaft
Step Shaft is widely used in many fields and industries such as machinery manufacturing, automobile industry, aerospace, energy industry, electronic equipment, and household appliances.

Valve core and valve body
Valve core and valve body are important parts of valves. They have high precision and reliability and are widely used in air conditioners, household appliances, medical equipment, automobile industry, water supply and drainage systems, and industrial piping systems.

Custom Bearing housing
We equipped with CNC cylindrical grinding machines and automatic measuring instruments for online inspection.We have a temperature-controlled workshop, achieving an accuracy of 0.002mm and a concentricity of 0.001mm.We specialize in mass production of various non-standard bearing housings and provide customized solutions for different industries.

CNC Part
CNC Parts are widely used in many fields and industries such as medical equipment, home appliances, electronics and semiconductors, automotive industry, aerospace, and machinery manufacturing due to their high precision and reliability.

Custom Crankshaft
Custom Crankshaft is a high-performance crankshaft designed and manufactured according to specific needs. It is used in automobiles, motorcycles, ships, aviation, industrial machinery and other fields. Custom Crankshaft has high precision, high strength and durability.
Our Services
- CNC Turning, Milling and Grinding at the same time with constant workshop
- Germany Zeiss CMM(The world’s top testing equipment )
- Customized service performance
- Provide assemble service for One-stop problem solving and saving cost
- 0.002mm highest precision tolerance
- Online video inspection and Escrow-Third party inspection
100% compensation for quality problems all the time





Customer Feedback
Certificate

Why Does a Connecting Rod Big-End Bore Change Shape After Assembly?
Tightening the connecting rod cap puts a big end under tension. The cap and rod body spread somewhat as the bolts in the cap are tightened to develop the necessary preload and to have the

How Does Crankshaft Journal Finish Affect Engine Bearing Fit?
The surface finish of a crankshaft journal affects its interaction with the oil film and bearing surface. The diameter of a journal and its geometric form, together with the assembled bearing bore size, determines the

How to Specify Custom CNC Parts for Machine Tool Rotary Tables
A drawing for a rotary-table part needs to explain how the part will fit and be checked in the assembly. Start with the bearing arrangement and mounting interfaces, choose functional datums, then specify material condition,

CNC Machining for Robotics: Which Parts Need the Tightest Tolerances?
CNC Machining for Robotics is not about holding every dimension to the smallest possible number. A robot cover, a mounting plate, and a rotating joint shaft do different jobs. Parts that control motion, alignment, torque

4340 Steel Connecting Rods: Why Material Matters for Strength and Fatigue Life
4340 Steel Connecting Rods are often specified for engines where repeated loading places greater demands on the rotating assembly. For a buyer, however, writing “4340” on the drawing is only the starting point. The finished

Why Do Engine Crankshafts Fail? How Machining and Fillet Geometry Affect Fatigue Life
A crankshaft can meet its main dimensions and still crack earlier than expected. In many cases, crankshaft failure begins where repeated bending and torsional loads meet a local weakness: a fillet, journal surface, machining mark,