Custom CS Series Stainless Steel Insert Ball Bearings Manufacturers, Factory

CS Series

CS Series insert bearings are a high-performance bearing design widely used in a variety of machinery and industrial equipment. These bearings combine a deep groove ball bearing and housing design to provide excellent load carrying capabilities and durability. CS Series is made of high-quality materials, has good corrosion resistance and wear resistance, and is suitable for harsh environments such as high temperature and high humidity. In addition, its simplified installation and maintenance processes allow users to easily replace and maintain the equipment, thereby increasing the overall efficiency of the equipment. CS Series insert bearings also come in a variety of specifications and sizes to meet different application needs and are widely used in agricultural machinery, automation equipment, and conveyor systems.

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STAINLESS STEEL · INSERT BEARING · CORROSION RESISTANT

CS Series Stainless Steel Insert Ball Bearings

AISI 440C set screw locking 2RS seals food grade options

The CS Series stainless steel insert ball bearings are engineered for applications where corrosion resistance, hygiene, and durability are critical. Constructed from AISI 440C martensitic stainless steel, these bearings offer excellent resistance to moisture, mild acids, and washdown environments without compromising load capacity. The spherical outer ring design compensates for shaft misalignment and mounting inaccuracies, while the set screw locking mechanism provides secure shaft attachment. Equipped with 2RS contact rubber seals on both sides, the bearings retain lubricant and prevent ingress of contaminants in food processing, pharmaceutical, and marine applications. The bearings are pre-lubricated with food-grade grease (NSF H1 registered) for direct contact with consumable products. Operating temperature ranges from -20°C to +110°C, compatible with high-temperature washdown cycles. Available in both inch and metric bore sizes for direct replacement in existing equipment.

Corrosion resistance

AISI 440C stainless steel construction provides excellent resistance to moisture, mild acids, and washdown chemicals in food and pharmaceutical environments.

Self-aligning design

Spherical outer ring compensates for shaft misalignment and mounting inaccuracies, reducing stress on the bearing and extending service life.

2RS sealing system

Dual-lip nitrile rubber seals provide superior protection against moisture ingress and contaminant penetration in washdown environments.

Secure locking

Set screw locking mechanism provides a secure interference fit on the shaft, preventing rotation slippage under shock loads.

Technical specifications

MaterialAISI 440C martensitic stainless steel

Bore diameter (inch)0.500 - 1.500 in

Bore diameter (metric)12mm - 40mm

Outer diameter1.000 - 2.500 in

Width range0.500 - 1.250 in

Locking typeSet screw (socket head)

Seal type2RS (nitrile rubber)

LubricationNSF H1 food-grade grease

Temperature range-20°C to +110°C

Precision gradeP0 (normal)

Application scenarios

Food processing equipment

Conveyor rollers, mixers, and packaging machinery in sanitary environments requiring washdown resistance.

Pharmaceutical manufacturing

Tablet presses, filling lines, and cleanroom conveyors where corrosion resistance is essential.

Marine and offshore

Deck machinery, winches, and equipment exposed to saltwater spray and high humidity.

Medical device manufacturing

Sterilization-friendly bearings for medical equipment and surgical tool production lines.

Packaging lines

Beverage filling, canning, and cartoning equipment requiring frequent cleaning cycles.

Agricultural machinery

Equipment exposed to fertilizers, pesticides, and outdoor weather conditions.

Technical inquiries

What is the difference between AISI 440C and 304 stainless steel for bearings?

AISI 440C is a martensitic stainless steel with higher hardness (58-60 HRC) and wear resistance compared to 304 (austenitic). 440C provides better load capacity and fatigue life, making it the preferred choice for bearing applications where corrosion resistance and mechanical strength are both required.

Is the CS Series suitable for high-temperature washdown?

Yes, the CS Series is designed for washdown environments with operating temperatures up to +110°C. The 2RS seals and food-grade grease maintain performance during high-temperature cleaning cycles. For continuous operation above 100°C, consult manufacturer for grease selection.

How do I properly torque the set screws?

Use a torque wrench with the specified torque value (typically 2-4 Nm for smaller sizes, up to 8 Nm for larger bearings). Over-tightening can deform the inner ring, while under-tightening may cause shaft slippage. Always use thread-locking compound for applications with vibration.

Can CS Series bearings be used in direct food contact applications?

Yes, the CS Series is available with NSF H1 registered food-grade grease, making it suitable for incidental food contact applications. The stainless steel construction and sealed design prevent lubricant contamination of food products.

Installation

Press the bearing into the housing using a mounting tool that contacts the outer ring. Ensure the shaft is clean and free of burrs before tightening the set screws.

Lubrication

Pre-lubricated with NSF H1 food-grade grease. For high-temperature or high-speed applications, relubrication intervals should be adjusted based on operating conditions.

Storage

Store in original packaging in a clean, dry environment. Avoid exposure to chlorinated solvents or high humidity that may compromise the corrosion-resistant properties.

Housing fit

Recommended housing tolerance is H7 for standard applications. For high vibration environments, use P6 housing fit to prevent outer ring rotation.

Bearing Designation	Dimension（mm）	Basic load ratings (kN)
d	D	C	B	r min	Cr	Cor
CS201	12	32	10	10	0.6	680	300
CS202	15	35	11	11	0.6	760	370
CS203	17	40	12	12	0.6	960	480
CS204	20	47	14	14	1	1280	660
CS205	25	52	15	15	1	1400	790
CS305	25	62	17	17	1.1	2250	1150
CS206	30	62	16	16	1	1950	1150
CS306	30	72	19	19	1.1	2700	1500
CS207	35	72	17	17	1.1	2550	1500
CS307	35	80	21	21	1.5	3350	1920
CS208	40	80	18	18	1.1	2950	1800
CS308	40	90	23	23	1.5	4080	2400
CS209	45	85	19	19	1.1	3150	2080
CS309	45	100	25	25	1.5	5280	3150
CS210	50	90	20	20	1.1	3500	2320
CS310	50	110	27	27	2	6180	3800

Bearing Designation

Dimension（mm）

Basic load ratings (kN)

r min

Cor

CS201

0.6

680

300

CS202

0.6

760

370

CS203

0.6

960

480

CS204

1280

660

CS205

1400

790

CS305

1.1

2250

1150

CS206

1950

1150

CS306

1.1

2700

1500

CS207

1.1

2550

1500

CS307

1.5

3350

1920

CS208

1.1

2950

1800

CS308

1.5

4080

2400

CS209

1.1

3150

2080

CS309

100

1.5

5280

3150

CS210

1.1

3500

2320

CS310

110

6180

3800

CS Series

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