With the comprehensive popularization of miniaturization and precision trends in intelligent manufacturing, various micro intelligent devices, precision testing instruments and small transmission modules have put forward extremely strict requirements on bearing accuracy, noise control and operational stability. Precision instruments, miniature medical devices, micro motors and small automatic reciprocating mechanisms often work under high-precision low-speed operation, frequent start-stop and long-term continuous running conditions. Traditional ordinary micro bearings have inherent defects such as insufficient raceway surface finish, low precision grade of steel balls and uncontrolled internal clearance.

During the operation of precision equipment, these defects easily cause rotation jamming, slight shaking and abnormal operating noise, directly leading to deviation of instrument detection data, jitter of micro motor operation and positioning offset of automatic modules, which seriously affect the overall accuracy and operational stability of equipment. At the same time, the internal installation space of micro equipment is extremely compact. Traditional non-standard micro bearings have large dimensional errors and poor interchangeability, resulting in difficult equipment maintenance and replacement. Low-cost micro bearings are made of low-purity materials with rough heat treatment processes, which are prone to wear, rust, increased clearance and rapid accuracy attenuation after long-term operation, failing to meet the long-term stable operation requirements of precision instruments.

In addition, medical equipment, precision testing instruments and smart household devices are extremely sensitive to operating noise. Ordinary micro bearings produce uneven rolling friction, loud operation noise and obvious vibration during high-speed operation, greatly reducing equipment use experience and product quality. The precision micro-equipment industry is in urgent need of standardized micro precision bearings with high accuracy, low noise, zero shaking and long wear resistance to adapt to various precision transmission scenarios in limited space and solve industrial pain points such as poor accuracy, high noise, easy wear and short service life of micro equipment.

NMT Micro Precision Deep Groove Ball Bearings are specially developed for high-precision, low-noise working conditions with limited installation space. Manufactured with high-purity precision bearing steel, the bearings feature dense and uniform material texture with extremely low impurity content, eliminating wear and accuracy attenuation caused by material defects from the source. The inner and outer ring raceways adopt ultra-mirror ultra-precision grinding technology with accurate curved surface radian and micron-level surface finish. Matched with precisely sorted high-precision steel balls, the rolling contact is uniform and smooth, rolling friction resistance is greatly reduced, effectively solving jamming, jitter and shaking problems of micro bearings and ensuring long-term precise and stable operation of equipment.

The complete product range includes open type, single-sided dust cover, double-sided dust cover and double-sided rubber sealed structures, adapting to different working environments such as dry dust-free, dusty, humid and clean conditions. Open micro bearings have excellent heat dissipation performance, suitable for indoor precision instrument working conditions with dry and dust-free environment. Metal shield sealed versions can block fine dust intrusion and adapt to ordinary automatic micro transmission equipment. Rubber sealed structures possess excellent water-proof, oil-proof and anti-impurity capabilities, coping with humid, spray and dusty complex working conditions, effectively protecting internal rolling elements and raceways and greatly extending bearing service life.

All micro bearing parts undergo constant-temperature precision heat treatment and shaping technology to stabilize dimensional accuracy, avoid dimensional deformation and clearance offset caused by temperature changes and long-term load operation, ensuring uniform clearance and consistent accuracy of finished bearings. The interior is filled with high-quality low-noise long-lasting lubricating grease, adapting to frequent start-stop and continuous operation of micro bearings. The bearings feature low temperature rise during operation and stable long-term lubrication, realizing ultra-low noise and ultra-low vibration operation for a long time.

All products adopt international standard micro bearing dimensions, covering ultra-small miniature sizes to conventional micro sizes with high standardization and excellent interchangeability. Users can directly replace various universal micro bearings on the market without modifying equipment structures, greatly reducing costs of equipment renovation, maintenance and replacement. Featuring compact micro size, lightweight design and high precision grade, the bearings are specially designed for miniaturized and lightweight precision transmission equipment, widely applied in high-end precision fields such as precision instruments, micro motors, medical equipment, small automatic devices and smart household equipment, maintaining stable transmission accuracy and silent operation for a long time.

Core Product Advantages

Made of high-purity precision bearing steel with dense texture. Precision heat treatment and shaping ensure excellent dimensional stability, resisting deformation and wear during long-term operation;

Ultra-mirror precision raceways matched with high-grade sorted steel balls achieve uniform and smooth rolling friction, eliminating rotation jamming and offset to guarantee positioning accuracy of precision equipment;

Diversified structural options including open, dust-proof and waterproof rubber sealed types adapt to dry, dusty and humid working scenarios with strong universality;

Filled with special low-noise long-lasting lubricating grease to reduce operating temperature rise and achieve excellent silent effect, solving abnormal noise and vibration of micro equipment;

Precision clearance control technology ensures uniform factory clearance without batch accuracy deviation, maintaining long-term precise transmission accuracy;

Full-size standardized micro specifications with superior interchangeability support convenient disassembly and replacement without equipment modification, reducing operation and maintenance costs;

Ultra-small lightweight design fits various narrow installation spaces, meeting the miniaturization and lightweight design requirements of micro precision equipment.

Typical Application Scenarios

Transmission parts of various precision testing instruments and laboratory analytical equipment; core bearings of micro DC motors, stepping motors and vibration motors; precision transmission mechanisms of miniature medical devices and portable intelligent testing equipment; sliding modules and micro flip swing actuators of small automatic equipment; operating components of smart household and small office equipment; fine-tuning rotating mechanisms of precision optical equipment and cameras; precision transmission parts of intelligent toys and small precision hardware equipment.

Quality Assurance

NMT Micro Precision Deep Groove Ball Bearings implement full-process refined closed-loop quality control. A dedicated precision quality inspection system is established targeting the high precision sensitivity and low fault tolerance of micro bearings. Raw materials are inspected batch by batch through metallographic structure, hardness and impurity content physical and chemical tests to screen qualified high-purity materials. Multiple precision inspection nodes are set for each process including ultra-precision raceway grinding, curved surface calibration, micron-level steel ball sorting, constant-temperature heat treatment shaping, lubricating grease filling and sealing assembly.

All finished products undergo strict micron-level dimensional precision verification, silent noise testing, jam-free rotation testing, durability life simulation testing and salt spray rust resistance testing before delivery. Products with excessive precision deviation, abnormal operating noise, unsmooth rotation, insufficient wear resistance and substandard rust resistance are strictly rejected. NMT provides high-precision, low-noise and long-life micro bearing supporting solutions for manufacturers of precision instruments, micro motors and high-end light industrial precision equipment with strict quality control standards.

Product Range

Open micro precision deep groove ball bearings, single-sided metal shield micro bearings, double-sided metal shield micro bearings, double-sided rubber sealed waterproof micro bearings. Professional one-on-one selection guidance is provided according to installation space, dust and humidity environment, operating speed and silent precision requirements.

Brand Strength

NMT has long been deeply engaged in the R&D and manufacturing of precision micro bearings, focusing on solving core industrial pain points of micro precision equipment such as rapid accuracy attenuation, loud operating noise, insufficient load capacity in narrow space and easy wear failure. Aiming at the technical difficulties of micro bearings with tiny size and high precision, NMT continuously optimizes ultra-mirror raceway processing technology, micron-level rolling element screening standards, constant-temperature heat treatment shaping technology and silent lubrication formula, improving the accuracy stability, silent performance, wear resistance and anti-corrosion capability of micro bearings.

With refined production technology and strict quality control system, NMT micro precision bearings realize high-precision, low-vibration and long-life operation in tiny sizes, helping equipment manufacturers optimize micro transmission structures, improve overall equipment precision and use texture, reduce product failure rate and after-sales operation and maintenance costs, fully meeting the long-term stable use requirements of high-end precision micro equipment.