SUS304 Angular Contact Ball Bearings Manufacturers

Jiangsu Yinghong Transmission Technology Co., Ltd. (YHU) is a SUS304 Angular Contact Ball Bearings manufacturer formed through the joint investment of Dongguan Yinghong, Linqing Boshuo, and Yancheng Jiwei. The SUS304 angular contact line is engineered for equipment that needs combined radial and axial load support in environments where ordinary bearing steel corrodes too quickly. We produce these bearings with automated production lines, Japanese precision manufacturing technology, and a quality system that follows the material from receiving inspection through final testing.

We operate as a Wholesale SUS304 Angular Contact Ball Bearings Factory, supplying OEMs, distributors, and plant engineering teams directly from our Yancheng facility. Standard dimensions are complemented by customized non-standard bearings with modified bore, outside diameter, width, sealing, lubrication, cage, and preload. The same production platform also supports bearing steel, stainless steel, ceramic, and plastic bearing lines under the YHU brand.

Application Fit: Combined Loads in Corrosive or Hygienic Environments

Angular contact ball bearings are used when a shaft carries radial and axial forces together. The inner and outer raceways are offset to form a contact angle, and axial load transfers through that angle. In SUS304 form, the same geometry provides corrosion resistance and a non-magnetic response in applications that would attack chrome steel or high-carbon stainless bearings.

• Food and beverage conveyors, filling lines, and washdown stations where cleaning agents and hot water contact the bearing.
• Medical devices and dental equipment with sterilization cycles and strict lubricant compatibility.
• Marine instrumentation, pumps, and deck equipment exposed to salt air or seawater splash.
• Semiconductor wet benches and chemical handling systems where acid and alkali resistance is required.
• Textile, packaging, and printing machinery with high humidity and periodic washdown.
• Precision instruments and lab equipment where non-magnetic behavior and smooth low-torque rotation matter.

YHU SUS304 Angular Contact Bearing Range and Configuration

The range is quoted against the working point of each application rather than a fixed size list. Our engineers begin with bore, outside diameter, contact angle, and the load direction, then add seals, lubrication, cage, preload, and tolerance class to match the duty cycle.

Material and Engineering Considerations

SUS304 material follows JIS G4303 and matches the chemical composition of ASTM 304: approximately 18 to 20 percent chromium and 8 to 10.5 percent nickel. It provides broad corrosion resistance and a neutral magnetic response in sensitive equipment. The practical trade-off is that SUS304 is austenitic and not hardenable by heat treatment, so the raceways are softer than bearing steel or SUS440C.

• Load capacity is lower than an equivalent chrome steel bearing; sizing should account for the softer raceway surface.
• For harder rolling surfaces in a stainless construction, SUS440C or hybrid ceramic balls are often specified.
• Ceramic balls reduce centrifugal loading at high speed and improve life when lubrication is marginal.
• Cage material is part of the corrosion review: stainless steel resists chemicals, while PEEK, PTFE, and PA66 cages reduce friction and expand chemical compatibility.
• Lubricant selection depends on temperature, washdown frequency, and any food-contact or cleanroom regulations.

For radial-only positions, we also manufacture SUS304 Stainless Steel Bearings with deep-groove geometry. The angular contact line extends that same material family to applications that need directional axial stiffness.

Quality System and Testing Evidence

Yinghong operates as a National High-Tech Enterprise and holds IATF 16949, RoHS, CE, and SGS certifications. The factory is equipped with high-precision inspection instruments covering dimensional accuracy, noise, vibration, sealing, wear resistance, and corrosion behavior. Material receiving, production processes, and finished goods are managed under a closed-loop quality system.

• Material certificates and SGS test reports are available for stainless steel projects.
• Noise and vibration are checked on finished bearings; quiet-running YHU stainless bearings are designed for approximately 20 to 25 dB operating noise.
• Sealing quality is verified so grease stays inside and washdown water or dust stays outside.
• Returned failed bearings go through failure analysis before a revised configuration is proposed.

Customization and OEM Support

Our workflow runs from solution design to prototype production, mass delivery, and after-sales technical support. We modify bore, outside diameter, width, contact angle, preload, internal clearance, sealing, cage material, and lubricant for the application. OEM and distributor programs can use the YHU brand or customer-specific marking according to the commercial agreement.

The R&D team works on structure and material optimization for motors, power tools, medical devices, semiconductor equipment, and aerospace subassemblies. When a standard size is not the right answer, a prototype lot is produced for validation before the production schedule is confirmed.

Information We Use to Configure Your Solution

A useful proposal starts with the bearing working point, not only the part number. The following inputs help our engineers define the correct SUS304 angular contact configuration:

• Application type and environment: washdown, chemical exposure, marine atmosphere, vacuum, or cleanroom.
• Operating loads: radial load, axial load, direction of the axial force, speed, duty cycle, and temperature range.
• Envelope: bore, outside diameter, width, shaft and housing tolerances, available space.
• Performance targets: precision grade, noise limit, friction torque, non-magnetic requirement, service life.
• Reference: drawing, sample, existing part number, or the failed bearing being replaced.
• Quality and delivery: inspection report format, material certificate, SGS report, packaging, and target quantity.

Documentation, Delivery, and Service

Orders are documented with lot traceability from material receipt to final inspection. We supply the inspection and material certificates agreed at quotation, and SGS test reports can be included when specified. Export packaging protects against moisture and transport shock, with product marking aligned to the purchase order.

After delivery, the engineering team supports installation questions, lubricant selection, and performance follow-up through the distributor or the plant maintenance channel. The wider product catalog is available under our Products section.

Frequently Asked Questions

Are SUS304 angular contact bearings a direct replacement for standard angular contact bearings?

Dimensionally, yes, if the size and tolerance class match. Load capacity is not identical because SUS304 rings are not hardened. Before approving the substitution, we review the application load point; for higher raceway hardness, SUS440C or a hybrid ceramic ball design is usually the safer route.

Are SUS304 angular contact ball bearings non-magnetic?

Austenitic SUS304 is essentially non-magnetic in the annealed condition. Machining can induce a slight magnetic response, so for instruments with strict magnetic requirements we combine SUS304 rings with ceramic balls and non-metallic cages.

Can you produce non-standard bore, outside diameter, or width?

Yes. Non-standard dimensions are a core part of the factory workflow. Send a drawing, sample, or existing part number with the operating conditions; we quote the custom dimension, confirm contact angle and preload, and provide prototypes before mass production.

What temperature range can these bearings handle?

The practical limit is usually set by the lubricant and seal material rather than SUS304. Standard greases cover roughly -30 to +150 degrees Celsius. Specially treated YHU stainless bearings have been applied from -253 to +350 degrees Celsius when the grease and separator are selected for that range.

What should be included in an RFQ for SUS304 angular contact ball bearings?

Bore, outside diameter, width, contact angle if known, direction and magnitude of axial and radial loads, speed, environment, temperature, precision grade, seal and lubricant preference, quantity, and the documentation set you need. A drawing or sample shortens the process and reduces the chance of a wrong configuration.

Related Products and Categories

Our portfolio also includes Deep Groove Ball Bearings for applications with different operating ranges, interfaces or integration requirements.