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21313 CA W33 Spherical Roller Bearing
The 21313 is a corrosion-resistant stainless steel single-row deep groove ball bearing measuring 65 x 140 x 48 mm, with rings, balls and cage all in AISI 440C martensitic stainless steel. It carries dependable radial and bidirectional axial loads in wet, humid or mildly corrosive environments where standard chrome-steel bearings would rust, rated at 240 kN basic dynamic load.
Product Overview
The 21313 is a corrosion-resistant stainless steel single-row deep groove ball bearing measuring 65 x 140 x 48 mm, with rings, balls and cage all in AISI 440C martensitic stainless steel. It carries dependable radial and bidirectional axial loads in wet, humid or mildly corrosive environments where standard chrome-steel bearings would rust, rated at 240 kN basic dynamic load.
Supplied open, the 21313 allows the highest possible speeds and is easy to relubricate, which suits oil-mist and circulating-oil lubrication in high-speed machinery.
Key Features
- Full stainless steel construction (rings, balls and cage) for corrosion resistance in wet or damp environments
- Deep uninterrupted raceway grooves carry radial and bidirectional axial loads
- Hygienic and easy to clean, suited to food, beverage and pharmaceutical machinery
- Open design allows the highest possible speeds and flexible relubrication in oil-lubricated systems
- AISI 440C stainless steel through-hardened to HRC 58–62 with precision-ground raceways
- ISO 15 / DIN 625 dimension series with CN radial internal clearance (standard)
Typical Applications
Typical applications include food and beverage processing equipment, medical and pharmaceutical machinery, pumps and valves handling corrosive fluids, outdoor and marine equipment, packaging and textile machinery, and household appliances where moisture or wash-down creates corrosion risk.
Technical Data
| Inside Ø (mm): | 65 |
| Outside Ø (mm): | 140 |
| Width (mm): | 33 |
| Tolerance for inside-Ø (mm): | 0/-0,015 |
| Tolerance for outside-Ø (mm): | 0/-0,018 |
| Tolerance for width (mm): | 0/-0,15 |
| Ring Material: | Rolling bearing steel |
| Bore: | cylindrical |
| Cage Material: | Brass |
| Rolling Element Material: | Rolling bearing steel |
| Basic Dynamic Load Rating (Cr): | 240 kN |
| Basic Static Load Rating (C0r): | 325 kN |
| Reference Speed: | 2400 r/min |
| Limiting Speed (Grease): | 1900 r/min |
Quality Assurance & Customisation
All 21313 bearings are manufactured from high-chromium rolling bearing steel with controlled heat treatment, precision-ground raceways and graded balls. Every batch is inspected for dimensional accuracy, radial clearance and noise level before dispatch, and our engineers can supply custom clearances, preloads or special packaging for OEM programmes.
Ordering & Quotation
Request a quotation for the 21313 today. We supply samples as well as production volumes with factory-direct pricing, and our engineering team is available to confirm interchangeability and application fit before you order.
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ZZ Bearing (Shanghai) Co., Ltd.
Add.: NO.18 Dongwu road, Songjiang Industrial Zone, Shanghai, China
Contact:Helen
Phone:+86-13062870081
Tel: +86-21-51061761
E-mail: sales@bearings-factory.com
