Ningbo Precision Tech specializes in metal injection molding (MIM) consumer electronics components — SUS304 smart-lock bevel gears, deadbolts, lock cylinders and fingerprint-lock tongue holders — with ±0.3% consistency, HRC 25–35 hardness and nickel-free options for skin-contact parts.
Smart-lock gears, deadbolts, lock cylinders, fingerprint-lock tongue holders and precision hinges.
They achieve HRC 25–35 hardness and wear resistance for tens of thousands of duty cycles.
Yes, for parts that contact sensitive skin.
±0.3% typical, ensuring reliable function across high-volume production.
MIM Smart Lock Slide Tongue Holder Manufacturer | Precision Fingerprint Lock ComponentsThe MIM slide tongue holder is the safety-critical guide that positions and supports a smart lock's deadbolt or latch bolt. Made from 17-4PH stainless steel via metal injection molding, it delivers complex net-shape guide slots, spring seats, and anti-rattle features in one part with 50,000+ cycle durability. What Is a Slide Tongue Holder?The slide tongue holder is the mechanical heart of a fingerprint smart lock's locking mechanism. It guides, positions, and supports the lock tongue (deadbolt or latch bolt) as it extends into the door frame and retracts upon authentication. Every time a fingerprint is recognized, a passcode is entered, or a key override is used, the slide tongue holder translates motor or solenoid motion into the precise linear movement of the lock tongue — smooth, silent, and perfectly aligned. This is a safety-critical component. A poorly made tongue holder causes binding, incomplete locking, or failure to retract in an emergency. A well-made one cycles 50,000+ times without dimensional wear, corrosion, or loss of alignment. When manufactured throughMetal Injection Molding (MIM), the slide tongue holder achieves its complex geometry — guide slots, mounting bosses, spring seats, and anti-rattle features — in a single net-shape part. No multi-step machining, no welding of sub-components, no assembly of separate guide pieces. One part. One process. Consistent quality. |
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MIM Stainless Steel Bevel Gear | Precision Smart Lock Transmission GearThis MIM stainless steel bevel gear is a small precision transmission component (8–15 mm, module 0.3–0.6) that redirects a smart lock motor's rotation 90° to drive the deadbolt. MIM suits it because the full 3D bevel tooth profile, bore, and hub are molded in one shot, avoiding specialized gear cutting. What Is a Smart Lock Bevel Gear?The bevel gear is the mechanical translator inside a smart lock: it converts the motor's horizontal rotation into the vertical rotation that drives the lock cylinder or deadbolt mechanism. When the fingerprint sensor authenticates, a small DC motor spins — and a pair of bevel gears redirects that motion 90° to throw the bolt. It is a tiny gear — typically 8–15 mm in diameter, module 0.3–0.6 — that carries a disproportionate amount of the smart lock's mechanical responsibility. If the gear teeth wear, the lock develops slop and noise. If a tooth breaks, the lock fails closed — or worse, fails open. And if the gear's bore tolerance is loose, the entire drive train sounds like a coffee grinder. At Precision-mim, we MIM-manufacture bevel gears in stainless steel — capturing the full tooth geometry, bore, and hub features in one shot, with the material strength to handle thousands of lock/unlock cycles without degradation. |
MIM Stainless Steel Smart Lock Deadbolt Mechanism | Precision Lock Tongue ComponentThis MIM stainless steel smart lock deadbolt is a precision lock tongue component, typically made from SUS304, 17-4PH, or 316L stainless steel. MIM suits it because the complex bolt profile, anti-saw pin recesses, and drive rack form as one strong, precise piece without welds or assembly. What Is the Smart Lock Deadbolt?If the cylinder is the brain and the motor and gears are the muscles, the deadbolt — often called the lock tongue — is the hand. It is the physical steel bar that extends from the lock body into the door frame strike plate, securing the door against forced entry. In a smart lock, the deadbolt must do everything a traditional deadbolt does — resist kicking, prying, sawing, and bumping — while also moving smoothly under motor power rather than human key torque. At Precision-mim, we MIM-manufacture smart lock deadbolts and lock tongues in stainless steel. The process produces the full bolt profile — including anti-saw pins, anti-pry shoulders, tapered lead-in, and drive slot — as a single piece with no welds, no assembly, and no weak points. |
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MIM Stainless Steel Smart Lock Cylinder | SUS304 Precision Lock Core ComponentThis smart lock cylinder is a precision lock core component MIM-manufactured in SUS304 stainless steel. Metal injection molding suits it because it forms complex internal bore geometry, paracentric keyway profiles, pin chambers, and undercut retaining grooves in a single operation, eliminating deep drilling, broaching, and multi-setup CNC machining. What Is a Smart Lock Cylinder?The lock cylinder is the beating heart of any lock — smart or mechanical. It houses the pin tumbler mechanism (or electronic actuator in smart locks), receives the key or motor command, and translates that input into the rotation that drives the deadbolt or latch. In a fingerprint smart lock, the cylinder must integrate the mechanical security of a traditional lock with the electronic actuation of a smart device — all within an envelope barely larger than a thumb. At Precision-mim, we MIM-manufacture smart lock cylinders in SUS304 stainless steel. The process produces the complex internal bore geometry, pin chambers, keyway profile, and mounting features in a single operation — no deep drilling, no broaching, no multi-setup CNC. |
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