Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
MIM
This component is a stainless steel mechanical locking/actuation rocker arm assembly manufactured via MIM (Metal Injection Molding). It features an integral monolithic structure, comprising an actuating part with a contoured internal bore and a driven part with locating protrusions. The part exhibits high strength, excellent wear resistance, and superior precision, making it ideally suited for use in small‑scale machinery as a locking mechanism, clutch assembly, or transmission control module, where it performs functions such as circumferential positioning, torque transmission, and motion switching.
- Product Description
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I. Basic Product Information
- Product Name MIM stainless steel transmission rocker arm assembly (locking/clutch mechanism component)
- Manufacturing process Metal Injection Molding (MIM)
- Material : Stainless steel (customizable to alloy steel, iron-based alloys, and other materials upon request)
- Core Use : As a mechanical locking, clutching, or transmission‑control component, it is used in automotive parts, power tools, smart home devices, and small industrial machinery to enable torque transmission, circumferential positioning, and motion switching.
II. Structure and Process Details
- Appearance and Structural Features
- Active agent (left side) The assembly features a stepped shaft‑mounting structure with a side‑swing arm. The front end incorporates a specially shaped internal bore, compatible with splined shafts or shafts of non‑standard cross‑sections. The side‑swing arm serves as a load‑bearing support, capable of transmitting lateral forces or functioning as an installation pivot point. The shaft mount and swing arm are integrally molded, ensuring uniform stress distribution and eliminating the risk of stress concentrations.
- Follower (right side) It is a cylindrical structure with locating protrusions; its inner wall is smooth, while its outer wall features multiple locating protrusions, enabling circumferential positioning relative to the equipment housing or mating components and preventing rotational misalignment. The cylindrical structure can be mated with the shaft section of the driving component to achieve coaxial rotation or sliding engagement.
- When used together, the two-piece assembly achieves precise alignment without additional fasteners, making it compatible with automated assembly lines and reducing assembly errors.
- MIM Process Advantages Are Evident
- One‑step forming of complex structures: intricate features such as irregular internal bores, side swing arms, and locating bosses require no secondary machining; they are directly formed in the mold, achieving dimensional accuracy within ±0.05 mm, with high inter‑part fit and eliminating the need for additional rework or adjustments.
- 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 the impact resistance of the rocker arm with the wear resistance of the inner bore and boss, making it well-suited for high‑frequency operation scenarios.
- Strong surface‑condition compatibility: The matte‑finish surface reduces friction on mating surfaces while enhancing corrosion resistance, and can be further treated—such as polishing or nickel plating—to suit humid or high‑cleanliness operating environments.
- Cost and Efficiency Advantages: Near-net-shape manufacturing significantly reduces subsequent machining, achieves high material utilization, and is well-suited for mass production, thereby effectively lowering per-unit costs.
- Performance Features
- Transmission/locking stability: The clearance between the specially shaped inner bore and the shaft is uniform, ensuring slip-free torque transmission; the follower’s locating boss fits tightly with the housing, providing reliable circumferential positioning that resists loosening and misalignment even under prolonged use.
- Wear and fatigue resistance: The mating surfaces undergo densification treatment, delivering exceptional wear performance, enabling them to withstand high‑frequency motion and impact loads. This ensures a long service life and minimizes the risk of wear and deformation.
- High structural strength: The monolithic, integrally formed structure features no welded joints, and the transition zone between the swing arm and the bearing housing/cylindrical body is free of weak points, enabling it to withstand substantial lateral forces and axial loads.
- Wide-ranging customization: Parameters such as the inner bore shape, rocker arm dimensions, and the number and placement of locating bosses can be tailored to meet customer requirements, ensuring compatibility with the installation space and functional needs of various equipment.
III. Application Scenarios
It is widely used in applications such as automotive seat‑adjustment locking mechanisms, clutch assemblies for power tools, drive‑control modules in smart home devices, and positioning systems for small industrial machinery, making it particularly well suited to mechanical transmission and locking applications that demand high part precision, wear resistance, impact resistance, and consistent batch-to-batch performance.
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