# Koyo 6203 Z Deep Groove Ball Bearing - 17 mm Bore, Single Shielded - MROSupply.com

***Koyo 6203 Z is a 62 series single-row deep groove ball bearing with a 17 mm bore, 40 mm OD, and 12 mm width. It features a single steel shield (Z) on one side for protection against contaminants. Suitable for electric motors, pumps, and general rotating machinery.***



## Product details:

- Catalog number: 6203ZC3
- SKU: 1494732
- Call for Pricing - 888-671-2883
- 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: 0.065 lb
- UPC: 60579005779


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


## Product attributes;

  
- Bearing Material: Steel
  

  
- Bearing Type: Deep Groove Ball Bearings
  

  
- Bore Diameter: 17 mm
  

  
- Cage Material: Steel
  

  
- Cage Type: Riveted
  

  
- Closure Type: Single Shield
  

  
- Dynamic Load Capacity: 12 kN
  

  
- Fillet Radius: 0.6 mm
  

  
- Internal Clearance: C0
  

  
- Lubricant: Grease
  

  
- Maximum RPM: 17000 rpm Grease/21000 rpm Oil
  

  
- Number of Rows: 1
  

  
- O.D.: 40 mm
  

  
- Operating Temperature Range: -30 to 120 deg C
  

  
- Outer Diameter Type: Straight
  

  
- Precision class: Class 0
  

  
- Series: 6200
  

  
- Static Load Capacity: 4.8 kN
  

  
- Type: Round
  

  
- Width: 12 mm
  

## Alternate products to `Koyo 6203 Z Deep Groove Ball Bearing - 17 mm Bore, Single Shielded - MROSupply.com`:
- [SKF 6203-Z deep groove ball bearing, 17mm bore, 1.575 in OD, shielded on one side with a metal shield. Features a sheet metal cage and normal internal clearance. Suitable for electric motors, pumps, and general industrial applications.](https://www.mrosupply.com/products/321088/as-markdown/)
- [NTN 6203Z is a 62 series single-row deep groove ball bearing with a 17 mm straight bore. It features a single steel shield (Z) on one side for protection against contaminants while maintaining low friction. Designed for general industrial rotating equipment such as electric motors, pumps, and fans.](https://www.mrosupply.com/products/279857/as-markdown/)
- [FAG 6203ZR deep groove ball bearing with 17mm bore, 40mm OD, and 12mm width. Single shielded (Z) design with ball guided cage. Suitable for high-speed applications requiring low friction and reliable performance. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2175464/as-markdown/)

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




## 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.