# NTN 7208BG Angular Contact Ball Bearing - 40 mm Bore, Open, Steel Cage - MROSupply.com ***NTN 7208BG single-row angular contact ball bearing with a 40 mm straight bore. Open enclosure with a steel cage. Constructed from high carbon chrome steel for durability. Designed for combined radial and axial loads in pumps, compressors, and machine tool spindles.*** ## Product details: - Catalog number: 7208BG - SKU: 277789 - Price: ***$111.50*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/) - Category: - [Single Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/single-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: 0.831 lb ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - a (Load Center): 1.3386 in - B (in): 0.7087 - Ball Material: Steel - Ball material: Steel - Bore Type: Round - Bore type: Round - Cage Material: Steel - Cage material: Steel - Cage Type: Pressed - Cage type: Pressed - Configuration: One - Contact angle: 40 º - d (in): 1.5748 - D (in): 3.1496 - Da max: 2.8740 in - da min: 1.8504 in - Db max: 2.9724 in - Double Row Width: 1.4173 in - Dynamic Load Rating: 7200 lbf - Dynamic load rating: 7200 lbf - Enclosure: Open - I.D.: 40 mm - Limiting Speed - Grease: 8300 RPM - Limiting speed - grease: 8300 RPM - Limiting Speed - Oil: 11000 RPM - Limiting speed - oil: 11000 RPM - Material: High carbon chrome steel - O.D.: 80 mm - Operating Temperature Range: -40 to 250 °F - Operating temperature range: -40 to 250 ºF - Precision: ISO class 0 - Quadruple Row Width: 2.8346 in - r (in): 0.0433 - r1: 0.0236 in - r1as max: 0.0236 in - ras max: 0.0394 in - Static Load Rating: 5150 lbf - Static load rating: 5150 lbf - Triple Row Width: 2.1260 in - Type: Angular Contact Ball Bearing ## Product documents / software: - [Drawing](https://documents.mrosupply.com/product_documents/59/73/5973972/1162_S_9Tu0vwD.png) - [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/72/7208BG/bearingfinder_2d_pdf_fixed_7208BG_rBeQI61.pdf) ## Alternate products to `NTN 7208BG Angular Contact Ball Bearing - 40 mm Bore, Open, Steel Cage - MROSupply.com`: - [SKF 7208 BEP is a 40mm bore angular contact ball bearing with a 40° contact angle and enhanced polyamide cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/313677/as-markdown/) - [Rollway 7208 B 40 mm Bore Size, 80 mm Outside Diameter, Angular Contact Ball Bearing, Straight Bore, 52100 Bearing Steel, Normal Radial Clearance](https://www.mrosupply.com/products/2889851/as-markdown/) - [SKF 7208 BECBJ is a 40mm bore angular contact ball bearing with a 40° contact angle and a machined brass cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/2066978/as-markdown/) - [Nachi Bearing 7208B Angular Contact Ball Bearing Single 40](https://www.mrosupply.com/products/207928/as-markdown/) - [FAG 7208B.TVP single row angular contact ball bearing with a 40mm bore. Features a polyamide cage for reduced noise and high-speed capability. Suitable for combined radial and axial loads. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2176511/as-markdown/) - [NSK 7208BWG single-row angular contact ball bearing with 40 mm bore and 40° contact angle. It features a machined brass cage for high-speed operation and carries combined radial and axial loads. Designed for pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/5035093/as-markdown/) - [FAG 7208B.JP single row angular contact ball bearing with 40mm bore. Features a sheet metal cage and ball-guided design. Suitable for high-speed applications requiring axial and radial load support. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2176504/as-markdown/) - [NSK 7208BEAT85 angular contact ball bearing with 40 mm bore and 40° contact angle. Features a polyamide cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles. Backed by NSK's precision-bearing engineering heritage.](https://www.mrosupply.com/products/5035091/as-markdown/) ## 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.