# Koyo 16004 Deep Groove Ball Bearing - 20 mm Bore, Open, Straight Bore - MROSupply.com

***Koyo 16004 is a single-row deep groove ball bearing with a 20 mm bore and 42 mm outside diameter. This open-type bearing has a straight bore and is designed for radial loads in general industrial rotating equipment such as electric motors, pumps, and fans.***



## Product details:

- Catalog number: 16004
- SKU: 1493880
- Price: ***$6.19*** 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: 0.049 lb


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


## Product attributes;

  
- Bore: 8
  

  
- I.D.: 20 mm
  

  
- O.D.: 42 mm
  
## Product documents / software:

- [drawing](https://documents.mrosupply.com/product_documents/68/6802/010_1.jpg)
## Alternate products to `Koyo 16004 Deep Groove Ball Bearing - 20 mm Bore, Open, Straight Bore - MROSupply.com`:
- [SKF 16004/C3 is a 20mm bore deep groove ball bearing with C3 greater-than-normal clearance and a sheet metal cage. This open bearing has no seals or shields, allowing for high-speed operation and easy relubrication. Suitable for electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/320541/as-markdown/)
- [NTN 16004 single-row deep groove ball bearing with 20 mm straight bore. Open design with no seals or shields for low friction and high-speed operation. Suitable for electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/283739/as-markdown/)
- [NTN 16004C3 single-row deep groove ball bearing with 20 mm straight bore, open enclosure, steel cage, and C3 radial internal clearance. High carbon chrome steel construction for general industrial rotating equipment such as electric motors, pumps, and fans.](https://www.mrosupply.com/products/282839/as-markdown/)
- [FAG 16004-A deep groove ball bearing with 20mm bore and 42mm OD. Features a 30° contact angle for improved axial load capacity. Open design, suitable for high-speed applications. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2178251/as-markdown/)
- [SKF 16004/C3 is a 20mm bore deep groove ball bearing with C0 medium clearance and a pressed steel cage. This open bearing has no seals or shields, making it suitable for high-speed applications where relubrication is required. Used in electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/320466/as-markdown/)
- [NSK 16004 deep groove ball bearing with 20 mm bore and 42 mm OD. Open design with no seals or shields, pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5030053/as-markdown/)
- [NSK 16004C3 deep groove ball bearing with 20 mm bore and C3 clearance. Open design with no seals or shields and a pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5030054/as-markdown/)
- [FAG 16004-A-C3 deep groove ball bearing with 20mm bore and 42mm OD. Features C3 clearance and 30° contact angle. Suitable for high-speed applications requiring reduced radial clearance. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2178253/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.