Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
MIM
This component is a stainless steel ratchet/stop gear manufactured via MIM (Metal Injection Molding). It is produced using an integral molding process, featuring a specially shaped internal bore and locating pin holes. The tooth profile is evenly distributed, delivering high precision, high strength, and excellent wear and impact resistance. Primarily used in mechanical transmission and locking mechanisms, it enables unidirectional motion, positioning, and anti-reverse functions, and is well-suited for power‑control modules in compact, high‑precision equipment.
- Product Description
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I. Basic Product Information
- Product Name : MIM precision ratchet / detent gear
- 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 unidirectional transmission, locking, or positioning component, it is used in power tools, automotive parts, smart home devices, and small mechanical drive systems to achieve functions such as back‑drive prevention, intermittent motion, and angular positioning.
II. Structure and Process Details
- Appearance and Structure
- The component is a flat, disc-shaped structure with evenly spaced serrated teeth along its outer edge. The tooth profiles are clear and well-defined, and the mating contact surfaces are smooth, enabling engagement with a pawl to achieve unidirectional rotation and reverse‑lock functionality.
- The center features a non‑circular internal bore that integrates a circular locating hole with an irregular keyway, enabling direct, precise mating with shaft‑type components to achieve circumferential positioning without the need for additional keyway machining.
- The mounting surface is equipped with small locating pin holes for installing locating pins, further enhancing assembly accuracy and circumferential anti-loosening performance to ensure stable operation of the mechanism.
- MIM Process Advantages Are Evident
- One‑step molding of complex structures: intricate features such as external serrated edges, non‑standard internal bores, and locating pin holes eliminate the need for secondary machining; they are directly formed in the mold, achieving dimensional accuracy within ±0.05 mm and ensuring high part‑to‑part consistency.
- Excellent material properties: The stainless steel, after sintering, exhibits high density with no porosity or shrinkage defects; following heat treatment, it achieves a uniform hardness distribution, combining wear resistance on the tooth surface with overall impact resistance.
- Controllable surface finish: Matte, polished, and other surface finishes can be achieved as required. The matte texture shown in the figure helps reduce meshing friction noise while enhancing corrosion resistance.
- Cost and Efficiency Advantages: Near-net-shape forming significantly reduces subsequent machining steps, achieves high material utilization, and is well-suited for mass production, thereby effectively lowering per-unit costs.
- Performance Features
- Strong transmission stability: The high-precision machining of the ratchet teeth and inner bore ensures smooth engagement with mating components, minimal transmission backlash, low operating noise, and long-term performance that is resistant to jamming or slippage.
- Wear and fatigue resistance: The tooth surfaces undergo densification treatment, delivering exceptional wear resistance and enabling high‑frequency unidirectional transmission and locking operations, with a long service life.
- Wide adaptability: Customizable parameters such as number of teeth, module, inner bore shape, and locating hole positions can be tailored to meet customer requirements, ensuring compatibility with the installation space and transmission needs of various equipment.
- Excellent corrosion resistance: Made of stainless steel, it is well-suited to challenging working conditions such as humidity and dusty environments, resists rust and oxidation, and requires low maintenance.
III. Application Scenarios
It is widely used in applications such as clutch mechanisms for power tools, locking components for automotive seat adjustments, drive modules in smart home devices, and one-way transmission systems in small machinery, making it particularly well suited to precision transmission and locking applications that demand high part accuracy, excellent wear resistance, and consistent batch-to-batch performance.
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