# Koyo 7308B-5G C3FY Angular Contact Ball Bearing - 40 mm Bore, Single Row, 40 Degree Contact Angle, C3 Clearance, Factory Greased - MROSupply.com

***Koyo 7308B-5G C3FY is a single-row angular contact ball bearing with a 40 mm straight bore. It features a 40-degree contact angle, improved internal geometry (5G), C3 clearance, and factory grease pack (FY). Designed for combined radial and axial loads in machine tool spindles, pumps, and compressors.***



## Product details:

- Catalog number: 7308B-5G C3FY
- SKU: 1495334
- Price: ***$88.81*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Koyo Bearing](https://www.mrosupply.com/brands/koyo-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: 0.653 lb
- UPC: 60579022308


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Bore Diameter: 40 mm
  

  
- Cage Material: Machined Copper Alloy
  

  
- Closure Type: Open
  

  
- Contact Angle: 40 Degree
  

  
- Dynamic Load Capacity: 49.6 kN
  

  
- Maximum RPM: 6900 rpm Grease/9200 rpm Oil
  

  
- Number of Rows: 1
  

  
- O.D.: 90 mm
  

  
- Series: 73B
  

  
- Static Load Capacity: 25.2 kN
  

  
- Type: Type G Caged Medium
  

  
- Width: 23 mm
  

## Alternate products to `Koyo 7308B-5G C3FY Angular Contact Ball Bearing - 40 mm Bore, Single Row, 40 Degree Contact Angle, C3 Clearance, Factory Greased - MROSupply.com`:
- [SKF 7308 BECBY angular contact ball bearing, 40mm bore, 40° contact angle, sheet metal cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/313787/as-markdown/)
- [SKF 7308 BECBM is a 40mm bore angular contact ball bearing with a 40° contact angle and machined brass cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/313710/as-markdown/)
- [SKF 7308 BEGAP 40mm bore angular contact ball bearing with a 40° contact angle and a glass-fiber-reinforced polyamide cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/313952/as-markdown/)
- [SKF 7308 BECBP angular contact ball bearing, 40mm bore, 40° contact angle, polyamide cage. Designed for combined radial and axial loads in pumps, gearboxes, and machine-tool spindles.](https://www.mrosupply.com/products/313875/as-markdown/)
- [SKF 7308 BEGAM 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/314020/as-markdown/)
- [Rollway 7308 BM 40 mm Bore Size, 90 mm Outside Diameter, Angular Contact Ball Bearing, Straight Bore, 52100 Bearing Steel, Normal Radial Clearance](https://www.mrosupply.com/products/2889884/as-markdown/)
- [NSK 7308BYG single-row angular contact ball bearing with 40 mm bore and 40° contact angle. It features a pressed steel cage and is 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/5035295/as-markdown/)
- [Nachi Bearing 7308BMUC3 Angular Contact Ball Bearing Single Flush Ground 40](https://www.mrosupply.com/products/5900185/as-markdown/)

## Product's reviews:
- Great service - great items at great price
- Koyo roller bearing inner ring - Good product.
- Admin assistance - good product!




## 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.