ZhongYi Gear Manufacturer (a member of ZhongYi Machinery)
Engineered for surgical robotics, automated infusion pumps, dialysis machines, clinical diagnostic analyzers, medical imaging tables, and laboratory liquid handling systems. ZhongYi manufactures miniature precision gears in biocompatible polymers (POM, PEEK, Nylon) and surgical stainless steels with acoustic noise levels below 35 dB.
Customization
100% to Drawing
Precision Standard
DIN 4-7 / AGMA 11-13
Fast Quote Turnaround
< 24 Hours DFM
Quality Certified
ISO 9001:2015
Engineering & Manufacturing Capability
We bridge the gap between engineering blueprints and reliable transmission performance. Whether you need prototype development, replacement parts, or volume OEM manufacturing, our technical team provides complete DFM optimization and precision machining.
How ZhongYi addresses the root causes of premature gear failure, excessive backlash, and operational wear in the field:
Hospital bedside devices and laboratory environments require silent operation (<35–40 dB). Any gear mesh whine, clicking, or vibration creates patient discomfort and interferes with sensitive optical sensors.
Diagnostic fluidics and surgical instruments prohibit liquid oil lubricants that could leak or outgas. Gears must operate reliably dry or with food/pharma-grade grease using self-lubricating engineering plastics.
Micro-dosing infusion pumps and robotic surgical tools require smooth, continuous fluid delivery without pulsation or micro-jitter, demanding sub-module gear tooth accuracy (Module M0.15 to M1.0).
Components must withstand chemical sterilization (autoclave, EtO, gamma radiation) and use certified medical-grade raw materials (FDA-grade POM/Delrin, PEEK, SS304/316L) with full batch certificates.
M0.1 to M2.0 (DP 150 to DP 12)
High-precision micro CNC hobbing, Swiss-type multi-axis turning, and precision polymer injection molding.
< 35 dB Ultra-Quiet Operation
Optimized tooth profile relief, high contact ratio helical pairs, and self-damping polymer pairings.
FDA POM, PEEK, 316L Stainless
Medical-grade Delrin/POM, virgin and glass-filled PEEK, PA66/Nylon, 304/316L stainless steel, and brass.
Ultrasonic Clean & Sealed Packaging
Multi-stage ultrasonic degreasing, passivated stainless steel finishes, and dust-free anti-static sealed packaging.
Upload any standard 2D blueprint or 3D CAD model. Our gear engineering team provides a detailed DFM report within 24 hours.
Core Industry Products
We produce high-reliability, custom-machined gears specifically engineered to match your torque, speed, mounting envelope, and environmental durability requirements.
Self-lubricating, chemical-resistant polymer gears for infusion pumps, blood analyzers, and automated pipetting systems.
Micro-precision stainless steel and brass gears for surgical robotic wrists, endoscopes, and dental handpieces.
Zero-backlash miniature worm drives for patient positioning beds, optical focusing drives, and micro-actuators.
Passivated stainless steel splined drive shafts and couplings for laboratory centrifuges and peristaltic pump drives.
Looking for a specialized tooth profile or custom gear pairing? We manufacture non-standard module sizes, modified pressure angles (14.5°, 20°, 25°), and custom backlash specifications according to your exact CAD models.
Quality Control & Inspection Matrix
Overseas machinery buyers cannot afford supplier quality defects. At ZhongYi, every gear batch passes rigorous metallurgical, dimensional, and tooth profile testing using world-class metrology instruments before dispatch.
Nikon / Keyence 2.5D Optical System
Non-contact micro-measurement of sub-module tooth profiles, tip radius, pitch runout, and bore concentricity.
Precision Sound-Level Noise Chamber
Measures running gear train acoustic sound pressure levels to verify compliance with sub-35 dB hospital noise limits.
Mitutoyo Optical Comparator
High-magnification tooth form comparison against master CAD DXF overlays to detect micro-burrs or flash.
XRF Material Analyzer
Ensures 100% compliance with medical RoHS, REACH, and biocompatible raw material specifications.
Zero-Risk Guarantee: 100% replacement or refund warranty against manufacturing defects.
Proven Real-World OEM Success
See how our metallurgical expertise, gear geometry optimization, and precision CNC grinding solve high-stakes transmission challenges for global machinery manufacturers.
Leading European Medical Device & In-Vitro Diagnostics Manufacturer (Company D)
31.2 dB Acoustic Noise
Ultra-Quiet Hospital Cleanroom Performance
The client needed a miniature multi-stage gearbox for hospital patient infusion pumps operating continuously at sound levels below 34 dB(A) without liquid lubrication to prevent drug contamination.
ZhongYi developed an ultra-precise micro-module (M0.25) gear train combining FDA-grade POM (Delrin) spur gears with passivated 316L stainless steel pinions. We incorporated modified tooth tip relief to eliminate meshing impacts and manufactured custom micro-injection tooling with cryogenic deburring.
Achieved verified operating acoustic noise level of 31.2 dB(A) (surpassing the 34 dB target)
100% lubricant-free dry operation with zero particulate generation or outgassing
Sustained over 12,000 continuous dosing cycles without measurable tooth wear
Passed full ISO 10993 biocompatibility testing and FDA 510(k) device submission requirements
Technical FAQ
Clear answers to common engineering, metallurgical, tolerance, and procurement questions for international OEM machinery buyers.
We process FDA and USP Class VI compliant polymers including Medical-Grade POM (Delrin 500P / 100P), PEEK (virgin and 30% glass/carbon filled for high autoclaving resistance), PA66/Nylon, and self-lubricating PTFE blends. All materials come with full resin manufacturer batch certificates.
We achieve ultra-quiet operation through three engineering methods: (1) High-accuracy micro tooth profile modification (tip and root relief) to eliminate mesh impact; (2) Polymer-on-metal alternating gear pairings to dampen resonant vibration; and (3) Helical and high-contact-ratio tooth designs that ensure smooth continuous load sharing.
We can manufacture miniature spur gears, worm gears, and pinions down to Module M0.1 (approx. DP 254) with outside diameters as small as 1.5 mm, using multi-axis Swiss micro-hobbing and high-precision micro-injection tooling.
All medical components undergo multi-stage ultrasonic degreasing and cleaning in deionized water. Stainless steel parts are passivated per ASTM A967. Cleaned parts are vacuum-sealed in anti-static, dust-free double packaging in a controlled packaging room.
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Heavy-torque yaw/pitch gears, slewing ring drives, and precision worm drives engineered for 20-year service life in wind turbines and solar tracking fields.
Send your 2D blueprints or 3D CAD files for Medical & Laboratory Equipment Components. Our senior gear engineers provide detailed manufacturability feedback, material optimization, and factory-direct pricing.
