Ningbo Precision Tech manufactures metal injection molding (MIM) parts for specialized 'other' applications — sintered porous stainless-steel filter elements, high-cycle appliance hinges, SUS304 complex components, eye-bolt driver sockets, anti-loosening lock-washer assemblies and smart-lock flip-tongue actuators — in 304/316L and 17-4PH stainless steels, achieving ±0.3% tolerance with custom tooling for both prototype and mass production.
Beyond the major industry categories, Metal Injection Molding serves a vast range of specialized and emerging applicationswherecomplex metal parts must be produced with precision, consistency, and cost efficiency. Ningbo Precision Tech'sMIM capabilities extend across diverse industrial and consumer sectors, producing components suchaspower tool accessory drivers, sintered porous metal filtersforfluidand gas filtration, high-cycle appliance hinges, smart lock flip tongue fixing seats, anti-loosening lock washer assemblies, and custom retaining rings. Our flexible MIM process accommodates a wide material portfolio including austenitic and martensitic stainless steels, low-alloy steels, and specialty alloys, allowing us tomatchmaterial properties precisely to each unique application requirement. Whether you need a single complex geometry that would require multiple machining operations or a high-volume componentwhereper-part cost reduction is critical, our engineering team evaluates each projectforMIMsuitability and provides design-for-manufacturing guidance.Frominitial concept through prototyping to full-scale production, we partner with clients to develop MIM solutionsfornon-standard industrial parts that conventional manufacturing cannot economically produce. Contact our engineering team to discuss your specific application.
Specialized precision metal parts outside the standard categories — sintered porous metal filters, appliance hinges, retaining washers and custom lock actuators.
Yes. Sintered stainless-steel filter elements with controlled porosity are manufactured by MIM for filtration and flow-control applications.
304 and 316L stainless steels, 17-4PH, low-alloy steels and selected specialty alloys.
Yes. We provide DFM support and tooling for prototype runs as well as high-volume mass production.
MIM Smart Lock Flip-Tongue Fixing Seat | Precision Lock Mechanism ComponentThe flip-tongue fixing seat is the actuator that drives a smart lock's main tongue, translating motor-driven cam rotation into precise linear motion. It is manufactured in SS304 stainless steel via metal injection molding, which delivers the complex cam profile, wear resistance, and cost-effective volume production this safety-critical component requires. What Is a Flip-Tongue Fixing Seat?The flip-tongue fixing seat is the mechanical actuator behind the main lock tongue in a smart door lock. When the fingerprint sensor, keypad, or mobile app authorizes entry, the motor-driven gear train rotates a cam that pushes against this fixing seat — which in turn drives the main lock tongue to extend or retract. It sounds simple, but the part carries enormous responsibility: it must translate rotational motion into precise linear displacement, withstand thousands of lock/unlock cycles without wear or deformation, and maintain dimensional stability through temperature swings from -20°C winter mornings to 50°C sun-exposed door panels. At Precision-mim, we manufacture flip-tongue fixing seats in stainless steel through the MIM process — achieving the complex cam-following geometry, tight dimensional tolerances, and surface hardness that this safety-critical component demands. |
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MIM Anti-Loosening Lock Washer Assembly | Precision Retaining Ring Components RBSL1616This MIM anti-loosening lock washer assembly is a two-piece interlocking ring set made in SS304 stainless steel, using locating pins and matching grooves to create a positive mechanical lock. MIM suits it by delivering matched-pair pin-to-groove precision, complex geometry, and corrosion-resistant strength in high volume. What Is an Anti-Loosening Lock Washer Assembly?This is a two-piece interlocking ring assembly — a precision-engineered locking mechanism designed to prevent loosening under high-speed rotation, vibration, and thermal cycling. The assembly consists of two matched circular ring components:
When assembled, the two rings interlock — the locating pins seat into the matching grooves, creating a positive mechanical lock that prevents relative rotation between the two components. The surface is stamped with model identification codes such as RBSL1616, enabling traceability during assembly and maintenance. |
SUS304 Stainless Steel MIM Parts Manufacturer | Precision Complex ComponentsSUS304 MIM parts are precision components molded from 18Cr-8Ni austenitic stainless steel, equivalent to AISI 304. MIM suits SUS304 because it produces complex, near-net-shape geometries with 40-50% elongation, good corrosion resistance, and non-magnetic properties at high production volumes. What Is SUS304 Metal Injection Molding?SUS304 is the Japanese Industrial Standard (JIS) designation for 18Cr-8Ni austenitic stainless steel — equivalent to AISI 304, EN 1.4301, and Chinese GB 06Cr19Ni10. It is the most widely used stainless steel grade globally, valued for its balanced combination of corrosion resistance, formability, and cost-effectiveness. Through Metal Injection Molding (MIM), SUS304 feedstock is injection-molded into complex near-net-shape geometries, debound, and sintered at high temperature to achieve near-full density. The result: precision stainless steel parts that are impossible or prohibitively expensive to produce through machining, casting, or stamping. Precision-mim specializes in SUS304 MIM parts for industrial applications requiring intricate geometries — multi-cavity housings, thin-walled brackets, fluid path components, sensor mounts, and custom-shaped structural elements that combine multiple features into a single piece. |
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MIM Eye Bolt Driver Socket | Power Tool Accessory for Screw Eyes & Cup HooksThe MIM Eye Bolt Driver Socket is a power tool accessory made in high-strength steel via metal injection molding. MIM suits it by molding complex internal tooth geometry and hex shank precision in one step, delivering wear resistance and cost-effective high-volume production. What Is an Eye Bolt Driver Socket?An eye bolt driver socket is a specialized power tool accessory designed to drive screw eyes (eye bolts), cup hooks, wing nuts, and other circular-head fasteners quickly and consistently — without the hand fatigue and inconsistent torque of manual installation. The business end features aY-shaped semi-circular arc with internal teeththat grip the circular profile of eye bolts, cup hooks, or wing nuts. The opposite end terminates in a standard1/4-inch hex shankthat fits into any cordless drill, impact driver, or quick-change chuck. Instead of wrestling with each eye bolt by hand — twisting a screwdriver through the eye, fighting for leverage, and ending up with inconsistent depth and alignment — the operator simply chucks the socket into a power tool and drives the fastener home in seconds. For production assembly lines, cabinet installers, and electrical contractors installing hundreds of fasteners per day, the time savings alone justify the tool cost within the first job. At Precision-mim, we manufacture eye bolt driver sockets in high-strength steel through the MIM process — achieving the complex internal tooth geometry, hex shank precision, and wear resistance that production-duty power tool accessories demand. |
MIM Stainless Steel Appliance Hinges Manufacturer | High-Cycle Door Hinge ComponentsMIM stainless steel appliance hinges are high-cycle door hinge components molded from 316L, 304, or 17-4PH stainless steel. MIM suits them because it forms complex 3D geometries in one step with wrought-like strength, full cross-section corrosion resistance, and 100,000+ cycle fatigue life. Why Metal Injection Molding for Door Hinges?Appliance door hinges carry an outsized burden: they determine how a refrigerator, oven, or dishwasherfeelsto the end user. A hinge that wobbles, squeaks, rusts, or sags after a year of use damages the brand perception of an otherwise well-engineered appliance. Traditionally, appliance hinges are made through zinc die-casting or multi-step stamping + machining. Both approaches have proven to be weak links in appliance reliability:
MIM stainless steel hinges solve both problems. The process molds complex 3D geometries in a single step, produces parts with mechanical properties approaching wrought material, and delivers corrosion resistance through the entire cross-section — not just a surface coating that can chip. |
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MIM Sintered Metal Filter Parts | Porous Stainless Steel Filtration ComponentsMIM sintered metal filter parts are precision porous stainless steel components made by metal injection molding, used for fluid and gas filtration, flow control, and noise reduction. MIM suits them because it creates uniform, controllable three-dimensional porosity and integrates filter media into complex shapes, eliminating assembly steps and leak points. What Are MIM Metal Filter Parts?Metal filter parts produced through Metal Injection Molding are precision porous components used for fluid and gas filtration, flow control, noise reduction, and powder fluidization. Unlike conventional machined or stamped filters, MIM sintered filters achievecontrolled, uniform porosity throughout the entire part— not just on the surface. The MIM process allows the integration of filter media directly into complex-shaped functional components: a single part can serve as both a structural housing and a filtration element. This eliminates assembly steps, reduces leak points, and enables geometries impossible with traditional powder compaction. Precision-mim manufactures custom porous metal filters in austenitic stainless steels (316L, 304) to customer-specified pore sizes, shapes, and flow characteristics. |
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