Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
MIM
This product is a stainless steel helical bevel gear assembly (including a mating ring gear) manufactured using the MIM metal powder injection molding process. It consists of a driving bevel gear and an internal ring gear, produced via an integral forming process that delivers high gear‑tooth accuracy, smooth meshing, and uniform strength. The component exhibits excellent wear resistance, impact resistance, and corrosion resistance, and is primarily used in the reduction drive systems of household appliances—such as food processors and high‑speed blenders—and small electric tools, enabling high‑torque, low‑noise power transmission.
- Product Description
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I. Basic Product Information
- Product Name : MIM stainless steel helical bevel gear assembly (including internal gear ring)
- Manufacturing process Metal Injection Molding (MIM)
- Material : Food-grade / Medical-grade stainless steel (e.g., 304/316L, with customizable alloy steels and other materials)
- Core Use As a core component of speed-reduction transmissions, it is used in food processors, high‑speed blenders, small power tools, and smart home devices to achieve power reversal, speed reduction, and torque amplification, making it well suited for high‑speed, heavy‑load operating conditions.
II. Structure and Process Details
- Appearance and Structural Features
- Driving bevel gear The assembly features a helical bevel gear design, with helical teeth distributed along the outer circumference and a star-shaped locating hole at the top, enabling precise engagement with the drive shaft for circumferential fixation. During meshing, the helical teeth provide a large contact area, ensuring smooth transmission, low noise, and the ability to withstand substantial torque.
- Mating internal gear ring : Designed for use with the driving gear, it features a straight‑tooth or helical internal gear profile on the inner wall and a polygonal outer contour with locating grooves, enabling direct engagement with the equipment housing for circumferential fixation. The meshing clearance between the internal and external gears is uniform, ensuring high transmission efficiency and minimizing slippage and jamming even under prolonged operation.
- The component features an integral, seamless structure with no welded joints, offering high structural strength and the ability to withstand high‑frequency impact loads, making it well suited for equipment operating under frequent start‑stop conditions.
- MIM Process Advantages Are Evident
- One‑step forming of complex tooth profiles: features such as helical gears, internal gear rings, and specially shaped locating holes are produced directly by molding, eliminating the need for secondary machining. Dimensional accuracy can reach ±0.05 mm, ensuring high meshing consistency among parts and obviating the need for additional fitting or adjustment.
- Outstanding material performance: The sintered stainless steel exhibits high density, free of porosity and shrinkage defects. After heat treatment, it achieves a uniform hardness distribution, combining wear resistance on the tooth surface with impact toughness in the core, making it well suited for high‑load transmission applications.
- Strong surface‑finish adaptability: It can be customized to achieve matte, polished, or other surface finishes as required. The matte texture shown in the figure helps reduce meshing friction noise while enhancing corrosion resistance, thereby meeting the hygiene standards for food‑contact equipment.
- 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
- High transmission efficiency: The helical gear teeth provide a large contact area, resulting in high transmission efficiency and low power loss, thereby effectively increasing the equipment’s output torque and operational efficiency.
- Wear and fatigue resistance: After surface densification treatment, the gear teeth exhibit excellent wear resistance, enabling them to withstand high‑frequency, long‑duration meshing and transmission. This results in a long service life and significantly reduces the likelihood of tooth surface wear and chipping.
- Corrosion-resistant and easy to clean: Made of stainless steel, this material is well-suited for humid, water‑rich working environments—such as food processors and high‑speed blenders—resisting rust and oxidation. Its smooth surface leaves no hard‑to‑reach crevices, making cleaning and maintenance simple while meeting the hygiene standards required for food-contact equipment.
- Wide adaptability: Customizable parameters such as number of teeth, module, tooth profile angle, and inner bore diameter can be tailored to meet customer requirements, ensuring compatibility with various equipment in terms of reduction ratio, installation space, and torque specifications.
III. Application Scenarios
It is widely used in the drive assemblies of kitchen appliances such as high‑speed blenders, food processors, and juicers, as well as in the reduction mechanisms of small power tools and smart home devices. It is particularly well suited for high‑load transmission applications that demand stringent requirements for component precision, wear resistance, hygiene standards, and batch-to-batch consistency.
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