Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
MIM
This component is a stainless steel double‑hole connecting sleeve/bushing manufactured via MIM (Metal Injection Molding). It features an integral figure‑eight structure, ensuring high coaxiality between the two holes, and combines high precision, high strength, excellent wear resistance, and superior corrosion resistance. It is primarily used in small machinery and transmission equipment as a dual‑shaft coupling sleeve, shaft support, or fluid‑diverting element, enabling synchronized dual‑shaft drive, precise shaft positioning, or media‑diversion functions.
- Product Description
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I. Basic Product Information
- Product Name MIM stainless steel double-hole coupling sleeve / shaft sleeve
- Manufacturing process Metal Injection Molding (MIM)
- Material : Stainless steel (customizable alloy steel and other alloy materials)
- Core Use : As a dual‑shaft coupling in transmission systems, an axle support within equipment, or a fluid‑diverting component, it is used in small machinery, power tools, and industrial equipment to achieve synchronized dual‑shaft drive, shaft support and positioning, and media diversion.
II. Structure and Process Details
- Appearance and Structural Features
- The component features an integrally molded figure‑8‑shaped double‑hole structure, with symmetrically arranged circular through‑holes at both ends. The two holes exhibit excellent coaxiality, enabling simultaneous engagement with two shaft‑type parts to achieve dual‑shaft synchronous transmission or support and positioning.
- The outer contour features smooth fillet transitions, eliminating sharp corners and stress concentration points. This design minimizes assembly‑induced scratches, enhances structural integrity, reduces stress concentrations, and accommodates load impacts during equipment operation.
- The inner bore surface is smooth and free of burrs, which reduces frictional resistance in shaft components, enhances transmission efficiency, and lowers the risk of wear and seizing during long-term operation.
- MIM Process Advantages Are Evident
- One‑step forming of complex structures: Multi‑feature geometries such as double holes and curved contours eliminate the need for secondary machining, being directly molded in the tooling. Dimensional accuracy can reach ±0.05 mm, with high inter‑part fitment and no additional trimming or fitting required.
- Outstanding material performance: The stainless steel, after sintering, exhibits high density with no porosity or shrinkage defects. Following heat treatment, it achieves a uniform hardness distribution, combining excellent wear resistance of the inner bore with overall structural strength, making it well-suited for high‑frequency transmission applications.
- Strong surface‑condition adaptability: The matte‑finish surface reduces frictional resistance while enhancing corrosion resistance, and can be further treated—such as polishing or hard chrome plating—to optimize wear resistance and corrosion protection.
- Cost and Efficiency Advantages: Near-net-shape forming significantly reduces subsequent machining, resulting in high material utilization and making it well-suited for mass production, thereby effectively lowering the per-unit cost.
- Performance Features
- Transmission / Support and Stability: The clearance between the double-hole and shaft components is uniform, ensuring smooth transmission without binding. This configuration enables synchronous rotation of the two shafts while providing support and positioning to prevent axial misalignment of the shaft parts.
- Wear and fatigue resistance: Following surface densification of the inner bore, it exhibits excellent wear resistance, can withstand high‑frequency shaft rotation and impact loads, boasts a long service life, and is less prone to wear and tear or scoring.
- Excellent corrosion resistance: Made of stainless steel, it is suitable for a wide range of operating environments, resists rust and oxidation, and requires low maintenance.
- Wide customization and adaptability: Parameters such as the diameter of the two holes, center distance, and outer contour dimensions can be adjusted to meet customer requirements, ensuring compatibility with various equipment’s installation spaces and transmission needs.
III. Application Scenarios
It is widely used in applications such as small‑machine dual‑shaft transmission couplings, shaft‑support components for power tools, and分流 (diverting) fittings for industrial fluid‑handling equipment, and is particularly well suited to the transmission and fluid‑control sectors, where high precision of internal bores, wear resistance, corrosion resistance, and batch‑to‑batch consistency are critical.
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