Precision Deep Groove Ball Bearings Manufacturer

We are Jiangsu Yinghong Transmission Technology Co., Ltd., the manufacturer behind the registered YHU brand. We specialize in high-precision deep groove ball bearings and customized non-standard bearings, serving OEMs, distributors and engineering teams in electric motors, power tools, robotics, medical devices, semiconductor equipment and other precision-driven industries.

Our production base in Jiangsu, China covers more than 15,000 square meters of factory area with nearly 10,000 square meters of manufacturing facilities. The group brings together more than 20 years of bearing industry expertise, over 300 sets of production equipment and a dedicated team of about 200 employees. Automated production lines, Japanese precision manufacturing technology and high-precision testing equipment support stable output for serial production and custom projects alike.

Our Deep Groove Ball Bearing Range

Within this category, we manufacture two material families: Bearing Steel Bearings and Stainless Steel Bearings. As a Deep Groove Ball Bearings manufacturer, we produce both families in metric and inch bore systems, from miniature and thin-section series to standard light and medium series. Every series can be supplied open, shielded or sealed according to the operating environment.

Bearing Steel Bearings — Standard Precision Series

Bearing steel offers high and uniform hardness, excellent wear resistance and a high elastic limit. Chemical composition, non-metallic inclusions and carbide distribution are tightly controlled during production, which is why this material remains the default when load capacity, stiffness and running accuracy come first.

• Inch R Series — R133, R1-4, R1-5, R144, R2-5, R2-6, R2/R2A, R155, R156/R166/R3/R3A, R168/R188/R4/R4A, R1810, R6/R1038 and R8 types for inch-dimension shafts.
• Thin-Section Series — 67, 68 and 69 series with reduced cross-section for robotics and compact assemblies.
• Metric MR Series — MR10, MR11 and MR12 bearings for instrumentation and micro motors.
• Metric Miniature Series — 68 and 69 miniature bearings for drones, dental equipment and compact motor systems.

All four series are available open, with metal shields or with rubber seals. The Bearing Steel Bearings page lists each series with its model structure.

Stainless Steel Bearings — Corrosion-Resistant Range

Stainless steel deep groove ball bearings provide corrosion resistance when exposed to moisture and other media. They are produced open or covered; covered types may use shields or seals, and sealed bearings can include a ring groove on the side of the ring for improved sealing performance.

• SUS420 — hardenable martensitic grade balancing hardness and corrosion resistance.
• SUS440 — higher hardness and wear resistance for cutting and sliding contacts.
• SUS304 — austenitic, corrosion-resistant and non-magnetic for instruments and appliances.
• SUS316 — enhanced resistance to chlorides and aggressive chemicals for marine and chemical duty.
• Special Stainless Steels — custom grades for extreme temperature, acid and alkali resistance or regulatory requirements.

The Stainless Steel Bearings page provides the available SUS420, SUS440, SUS304, SUS316 and special stainless series.

Application Fit and Material Selection

YHU deep groove ball bearings are found in electric motors, power tools, pneumatic tools, robotics, drones, household appliances, precision instruments, semiconductor equipment, medical devices, marine equipment, aerospace applications, financial equipment, textile machinery and fishing equipment.

• Bearing steel — maximum load capacity, hardness and wear resistance in controlled industrial environments.
• SUS420 / SUS440 — corrosion resistance combined with mechanical hardness where moisture and wear act together.
• SUS304 / SUS316 — superior corrosion resistance, washdown tolerance and non-magnetic behavior for medical, marine, food and semiconductor applications.

The range is designed for low noise, low vibration, low friction, high precision, effective sealing and high-speed operation. Measured operating noise is typically 20–25 dB, and specially treated stainless steel bearings operate from -253°C to 350°C, covering cryogenic equipment and high-temperature process machinery in one product family.

Engineering Value, Quality Assurance and Acceptance

As a National High-Tech Enterprise, we hold multiple invention and utility model patents and operate a closed-loop quality management system certified to IATF 16949.

High-precision testing equipment verifies precision, noise, vibration, sealing, wear resistance and corrosion resistance from incoming raw material through finished-goods release. This is especially important for miniature and thin-section bearings, where batch consistency directly affects motor balance, instrument accuracy and assembly yield at the customer's production line.

Customization and Project Support

Beyond standard types, we develop custom non-standard deep groove ball bearings from customer drawings, samples or failed parts. The service covers bearing design and optimization, prototype production, mass delivery and after-sales technical support, including installation questions, lubrication selection and in-service failure analysis.

For adjacent bearing families, review our full Products range, which also includes flanged bearings, dental handpiece bearings, thrust ball bearings and specialized material series.

Information We Use to Configure Your Solution

Each quotation starts from your working point rather than a generic price list. Provide the following information, or send a drawing and sample for our engineering team to measure and quote:

• Bearing reference or dimensional drawing with bore, outside diameter and width
• Metric or inch series, including R-series and MR-series designations
• Material: bearing steel, SUS304, SUS316, SUS420, SUS440 or special stainless
• Sealing: open, metal shield or rubber seal; ring-groove requirements
• Load and speed at the working point, including any combined axial load
• Operating temperature, humidity, washdown chemicals or abrasive media
• Noise, vibration and precision-grade limits, plus lubrication type
• Estimated annual quantity and delivery schedule
• For custom work: application description, mounting arrangement and constraints

Customer FAQ — Deep Groove Ball Bearings Manufacturer

What series are available in the Deep Groove Ball Bearings category?

We manufacture bearing steel deep groove ball bearings in Inch R Series, Thin-Section 67/68/69, Metric MR Series and Metric Miniature Series, plus stainless steel grades in SUS420, SUS440, SUS304, SUS316 and special stainless. Open, shielded and sealed configurations are available across all series.

When should we choose stainless steel instead of bearing steel?

Bearing steel provides the highest hardness, wear resistance and load capacity for dry, lightly lubricated environments. Stainless steel is selected where moisture, washdown chemicals, humidity or non-magnetic properties matter. SUS420 and SUS440 combine corrosion resistance with hardness, while SUS304 and SUS316 maximize corrosion resistance in aggressive media.

Can you produce custom or non-standard deep groove ball bearings?

Yes. We develop custom bearings from drawings, samples or failed parts, including design optimization, material selection, prototype production, mass delivery and after-sales technical support. Non-standard bores, widths, sealing arrangements and special materials are within our manufacturing scope.

What quality certifications does the company hold?

We are a National High-Tech Enterprise with IATF 16949 certification and RoHS, CE and SGS evidence. Our factory in Jiangsu, China uses automated production lines and high-precision testing equipment; finished bearings are checked for precision, noise, vibration, sealing, wear resistance and corrosion resistance before shipment.

What do you need to prepare a quotation for deep groove ball bearings?

Send the bearing reference, dimensions or drawing, preferred material, sealing type, load and speed, operating temperature and environment, and estimated quantity. For custom bearings, an application description and sample or failed part help us define the correct configuration and delivery program.