II. Product Features
1. High precision, low friction
Using ultra-precision machining technology, the cylindrical error of the shaft is controlled within ±0.001mm, and the surface roughness is Ra≤0.2μm. When it is matched with linear bearings, sliders and other components, the friction coefficient is reduced by 40%, ensuring smooth linear motion. The positioning accuracy can reach ±0.01mm, meeting the operation requirements of high-precision equipment.
2. High strength and wear resistance
Using high-strength materials such as 42CrMo alloy steel and 304 stainless steel, after quenching, nitriding and other heat treatment processes, the surface hardness reaches HRC55-62, and the tensile strength exceeds 1200MPa. It can withstand high load and high speed conditions, and the wear resistance is improved by 3 times, and the service life is up to 8-10 years.
3. Diversified design, strong adaptability

Provide a variety of types such as optical shaft, spline shaft, trapezoidal screw, etc., with a shaft diameter range of Φ6mm-Φ120mm and a length of 50mm-2000mm. Supports customization of special shaft end structures, thread specifications and surface treatment processes, adapts to linear modules and transmission devices of different brands, and meets the needs of various industrial scenarios. Some common specifications are as follows:

Type	Material	Diameter range (mm)	Length range (mm)	Main application scenarios
Linear axis	45# steel	Φ6 - Φ50	100 - 1500	Automation equipment linear motion
Trapezoidal lead screw	42CrMo	Φ16 - Φ80	200 - 2000	Machine tool feed transmission system
Spline shaft	Alloy steel	Φ20 - Φ120	300 - 1800	Industrial robot joint transmission

4. Strong environmental adaptability
Stainless steel shaft components are passivated and have excellent anti-rust and anti-corrosion capabilities, suitable for harsh environments such as humidity, acid and alkali; the shaft body with chrome plating and hard chrome plating further improves wear resistance and corrosion resistance, and broadens the application range of the product.
III. Product details
1. Material type
 Alloy steel: Alloy steels such as 42CrMo and 35CrMo have high strength and high toughness after tempering and quenching, and are suitable for heavy-loaded and high-speed transmission shafts, such as machine tool spindles and industrial robot joint shafts.
 Stainless steel: 304 stainless steel has good comprehensive performance and is suitable for general industrial environments; 316L stainless steel adds molybdenum elements and has stronger corrosion resistance. It is often used in food processing, medical equipment and other equipment with strict hygiene requirements.
 Hard alloy: Tungsten steel and other hard alloy materials have high hardness and excellent wear resistance. They are suitable for making high-precision and high-load screws and guide shafts, and are used in precision processing equipment.
2. Manufacturing process
 CNC machining: Through turning, milling, grinding and other processes, the outer diameter, inner hole, thread, keyway and other structures of the shaft are accurately controlled to ensure dimensional accuracy and surface quality.
 Heat treatment: Adopt quenching, tempering, carburizing, nitriding and other processes to improve the hardness, wear resistance and fatigue strength of the material and enhance the comprehensive performance of the shaft.
 Surface treatment: Provide chrome plating, nickel plating, blackening, Dacromet and other surface treatment processes to enhance the rust resistance and wear resistance of the shaft and meet different appearance requirements.
3. Quality inspection
 Dimension inspection: Use three-coordinate measuring instrument, roundness meter, roughness meter and other precision equipment to fully inspect the key dimensions such as shaft diameter, cylindricity, straightness, surface roughness, etc. to ensure that they meet the design requirements.
 Performance inspection: Verify the mechanical properties of the shaft through hardness test, tensile test, fatigue life test, etc.; perform dynamic balance test to ensure the stability of the shaft during high-speed rotation.
Non-destructive testing: Use ultrasonic flaw detection, magnetic particle flaw detection and other technologies to detect whether there are cracks, sand holes and other defects inside the shaft to ensure that the product leaves the factory with zero hidden dangers.