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
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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,

How Do Tolerance Stacks Affect Custom Precision Shafts in Machine Tools?
A Custom Precision Shaft used in machine tools is rarely judged by one dimension alone. In spindle assemblies, rotary mechanisms, drive systems, and other precision machine-tool structures, performance depends on how diameters, shoulders, fits, geometric

Forged vs Billet Connecting Rods: Which Is Better for Performance Engines?
Billet Connecting Rods are often considered for performance engines that need custom geometry, low-volume production, or repeated design changes. Forged rods may make more sense once the design is mature and production becomes repeatable. But

Eccentric Shaft Design Checklist: Tolerances, Datums, Materials, and Inspection
A workable eccentric shaft design starts long before the first cutting operation. A drawing may show the required offset and shaft diameters, yet production problems can still appear if the datum structure, critical tolerances, material

Automotive Connecting Rod Machining: Which Features Require the Tightest Control?
Automotive Connecting Rod Machining requires more than checking whether several dimensions fall inside a drawing tolerance. The big-end bore, small-end bore, center distance, mating faces, and locating surfaces operate as one geometric system. A bore

How to Design a Custom Spindle Shaft for High-Speed Machine Tools?
A Custom Spindle Shaft is a critical component in high-speed machine tools because it directly affects rotation stability, machining accuracy, and long-term operating performance. However, designing a spindle shaft is not simply a matter of