# 5308 | Nachi - MROSupply.com ***Nachi Bearing 5308 Double Row Angular Contact Ball Bearing Open 20*** ## Product details: - Catalog number: 5308 - SKU: 208182 - Price: ***$82.52*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Nachi Bearing](https://www.mrosupply.com/brands/nachi-bearing/) - Category: - [Double Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/double-row-angular-contact-bearings/) - [Angular Contact Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/) - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/) - [Bearings](htts://www.mrosupply.com/bearings/) - Unit of measure: each - Weight: 2.310 lb - UPC: 4991893605082 - Technicall support: contact supplier for technical support on 800-829-5787 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Bore Type: Cylindrical - Cage Material: JIS S55C Steel - Closure Type: Open - Contact Angle (Deg): 20° - Dynamic Load Capacity (N): 63500 - Grease Fill: No Fill - Inner Diameter (mm): 40 - Inner Ring Material: JIS SUJ2 Steel - Internal Clearance: CN/C0 - ISO Precision Class: P0 - Limiting Speed - Grease (RPM): 5500 - Limiting Speed - Oil (RPM): 7500 - Max Operating Temp.: 120°C (248°F) - Number of Rows: 2 - Outer Diameter (mm): 90 - Outer Ring Material: JIS SUJ2 Steel - Preload: N/A - Rolling Element Material: JIS SUJ2 Steel - Seals or Shields: No - Series: 5300 - Snap Ring: No - Static Load Capacity (N): 46500 - Universally (Flush) Ground: N/A - Width (mm): 7500 ## Product documents / software: - [5308](https://documents.mrosupply.com/product_documents/52/5200/385-388.pdf) - [Assembly Manual](https://documents.mrosupply.com/product_documents/60/604/B3115E.pdf) - [Complete Guide](https://documents.mrosupply.com/product_documents/60/604/B1031E-5.pdf) - [General Information](https://documents.mrosupply.com/product_documents/60/604/gene.pdf) - [Series Description](https://documents.mrosupply.com/product_documents/60/604/bear.pdf) - [Tolerances](https://documents.mrosupply.com/product_documents/60/604/B1032E-5.pdf) ## Alternate products to `5308 | Nachi - MROSupply.com`: - [Rollway 3308 40 mm Bore Size, 90 mm Outside Diameter, Angular Contact Ball Bearing, Double Row, Straight Bore, 52100 Bearing Steel, Normal Radial Clearance](https://www.mrosupply.com/products/2889811/as-markdown/) - [SKF 3308 A double-row angular contact ball bearing, 40mm bore, 90mm OD, 30° contact angle, sheet metal cage. Designed for combined radial and axial loads in both directions. Suitable for pumps, gearboxes, and general industrial machinery.](https://www.mrosupply.com/products/315825/as-markdown/) - [SKF 3308 E double-row angular contact ball bearing, 40mm bore, 90mm OD, 36.5mm width. Enhanced capacity design for combined radial and axial loads in both directions. Suitable for pumps, gearboxes, and general industrial machinery.](https://www.mrosupply.com/products/2069083/as-markdown/) - [FAG 3308-BD double row angular contact ball bearing with 40mm bore and 90mm OD. Features a 40° contact angle for high axial load capacity in both directions. Suitable for precision applications requiring rigid guidance and high running accuracy.](https://www.mrosupply.com/products/2174594/as-markdown/) - [NSK 5308J Double-row angular contact ball bearing with 40 mm bore. It features a pressed steel cage and is open (unsealed). This bearing carries combined radial and axial loads in both directions, making it suitable for pumps and machine tools.](https://www.mrosupply.com/products/5033055/as-markdown/) - [NTN 3308 double-row angular contact ball bearing with a 40 mm straight bore. Open design with no seals or shields. The 33 series bearing accommodates combined radial and axial loads in both directions. Suitable for pumps, compressors, and gearboxes.](https://www.mrosupply.com/products/284174/as-markdown/) - [NTN 5308 double-row angular contact ball bearing with a 40 mm straight bore. Open design with no seals or shields. Suitable for applications requiring high axial load capacity in both directions, such as pumps and gearboxes.](https://www.mrosupply.com/products/284065/as-markdown/) - [NSK 3308J double-row angular contact ball bearing with 40 mm bore. It features a pressed steel cage and is open (unsealed). This bearing carries combined radial and axial loads in both directions, making it suitable for pumps and machine tools.](https://www.mrosupply.com/products/5032683/as-markdown/) ## Product's reviews: - Good stuff great price - Exactly what I ordered. ## FAQ: - How do I choose the right type of bearing for my application?: Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design. - What is the difference between deep groove and angular contact ball bearings?: Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.