Product Features
1. High strength and high wear resistance
Using high-quality materials such as 42CrMo alloy steel and 304/316L stainless steel, after quenching, carburizing and other heat treatment processes, the hardness can reach HRC50-65, and the wear resistance is improved by more than 3 times. Under high load and strong friction conditions, it can still maintain good structural integrity, and the service life is extended to 2-3 times that of ordinary parts.
2. High-precision manufacturing process
Using a five-axis linkage CNC machining center, combined with laser cutting and grinding and polishing technology, the inner diameter accuracy of the sleeve is controlled at ±0.005mm, the cylindrical error is ≤0.002mm, and the surface roughness Ra≤0.2μm. Precise dimensional tolerances ensure perfect coordination with shafts, pins and other components, effectively reducing equipment operation noise and energy consumption.
3. Multifunctional design
According to different application scenarios, a variety of structural designs with internal threads, external threads, positioning grooves, oil holes, etc. are provided. Some sleeves have built-in self-lubricating coatings to reduce friction between components; the special sealing structure design can effectively prevent dust and liquid intrusion and improve the reliability of equipment operation.
4. Wide applicability

The product specifications are complete, with an outer diameter range of 10mm - 200mm, a wall thickness of 1mm - 15mm, and supports customized production. It is suitable for automated production lines in multiple industries such as automobile manufacturing, electronic appliances, and medical equipment, and has good compatibility with equipment of different brands. Some common specifications and parameters are as follows:

Type	Material	Outer diameter (mm)	Inner diameter (mm)	Wall thickness (mm)	Main application scenarios
Guide sleeve	42CrMo	20 - 80	18 - 78	1 - 2	Automated robot arm guidance
Locate sleeve	304 Stainless Steel	30 - 100	28 - 98	1 - 3	Precision assembly equipment positioning
Threaded sleeve	alloy steel	15 - 50	12 - 47	1 - 1.5	Component fastening and connection

Product Details
1. Material Type
Alloy steel: represented by 42CrMo and 35CrMo, it has high strength and toughness after quenching and tempering treatment, and is suitable for occasions with heavy loads and impacts, such as mechanical transmission sleeves in automobile production lines.
Stainless steel: 304 stainless steel has good comprehensive performance and is suitable for general industrial environments; 316L stainless steel has strong tolerance to strong corrosive media such as acids, alkalis, and seawater due to the addition of molybdenum elements, and is often used in automation equipment such as food, medicine, and marine engineering.
Copper alloy: such as tin bronze and aluminum bronze, it has excellent friction reduction and wear resistance, and is often used in precision instrument sleeves with strict requirements on friction coefficient.
2. Processing Technology
Forging process: die forging or free forging is used to refine metal grains, improve material density and mechanical properties, and ensure the overall strength of the sleeve.
CNC machining: high-precision dimensional machining is achieved through turning, boring, grinding and other processes; some complex structures are processed by electric spark machining to meet special shape requirements.
Surface treatment: Provide a variety of surface treatment processes such as blackening, hard chrome plating, chemical nickel plating, anodizing, etc. to enhance the sleeve's rust-proof, wear-resistant and corrosion-resistant properties.