# SKF 61904-2RZ Deep Groove Ball Bearing 20mm Bore Low-Friction Non-Contact Sealed Both Sides - MROSupply.com

***SKF 61904-2RZ deep groove ball bearing, 20mm bore, low-friction non-contact rubber seals on both sides. Sheet metal cage, bearing steel construction. Suitable for applications requiring reduced friction and protection from contaminants.***



## Product details:

- Catalog number: 61904-2RZ
- SKU: 326375
- Price: ***$104.45*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SKF Bearing](https://www.mrosupply.com/brands/skf-bearing/)
- Category: 
    - [Thin Section Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/thin-section-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.090 lb


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


## Product attributes;

  
- Basic Dynamic Load Rating: 6.37 kN
  

  
- Basic Static Load Rating: 3.65 kN
  

  
- Bearing Outer Ring Locating Feature: None
  

  
- Bore Diameter: 20 mm
  

  
- Bore Type: Cylindrical
  

  
- Cage: Sheet metal
  

  
- Coating: Without
  

  
- Dimension Type: Metric
  

  
- Filling Slots: Without
  

  
- I.D.: 7/9 in
  

  
- Inner Diameter (mm): 20.000
  

  
- Limiting Speed: 20000 r/min
  

  
- Locating Feature Bearing: None
  

  
- Lubricant: Grease
  

  
- Lubricant (in Bearing): Grease
  

  
- Matched Arrangement: No
  

  
- Material: Bearing steel
  

  
- Material/Treatment: Bearing steel
  

  
- Number of Rows: 1
  

  
- O.D. (in): 1 4/9
  

  
- Outer Diameter (mm): 37.000
  

  
- Pack Height: 80 mm
  

  
- Pack Length: 80 mm
  

  
- Pack Width: 12 mm
  

  
- Radial Internal Clearance: C0
  

  
- Reference Speed: 43000 r/min
  

  
- Relubrication Feature: Without
  

  
- Seal Type: Non-contact
  

  
- Sealing: Seal on both sides
  

  
- Sealing Type: Non-contact
  

  
- Tolerance Class: Normal
  

  
- Width: 9 mm
  

  
- Width (mm): 9.000
  
## Product documents / software:

- [Abutment dimensions](https://documents.mrosupply.com/product_documents/61/61816-2RZ/150220000320-201000020wp_c7zDrTI.svg)
- [Dimensions](https://documents.mrosupply.com/product_documents/61/61816-2RZ/120120002820-201000020wp_tkDa7Bi.svg)
- [DXF](https://documents.mrosupply.com/product_documents/61/61904-2RZ/61904-2RZ_HvqUEcO.dxf)
## Alternate products to `SKF 61904-2RZ Deep Groove Ball Bearing 20mm Bore Low-Friction Non-Contact Sealed Both Sides - MROSupply.com`:
- [Nachi Bearing 6904-2NSEC3 Deep Groove Ball Bearing with 2 Seals](https://www.mrosupply.com/products/207968/as-markdown/)
- [Koyo 6904 2RU deep groove ball bearing with 20 mm bore, 37 mm OD, and 9 mm width. Double sealed with rubber seals for contaminant protection. Single-row radial design for electric motors, pumps, and general machinery.](https://www.mrosupply.com/products/1495168/as-markdown/)
- [NTN 6904LLUC3/EM 6900 series single-row deep groove ball bearing with a 20 mm straight bore. Features double contact rubber seals (LLU), C3 internal clearance, and a machined brass cage (EM). Designed for high-speed applications requiring reduced vibration and extended service life in electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/278168/as-markdown/)
- [NSK 6904VV sealed deep groove ball bearing with 20 mm bore and 37 mm OD. It features double non-contact rubber seals (VV) for low-friction sealing and a pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034630/as-markdown/)
- [NTN 6904LLB is a 6900 series single-row deep groove ball bearing with a 20 mm straight bore. It features double non-contact rubber seals (LLB) for low-friction sealing. Suitable for electric motors, pumps, and general rotating machinery.](https://www.mrosupply.com/products/278172/as-markdown/)
- [NSK 6904DDUC3 sealed deep groove ball bearing with 20 mm bore. Double contact rubber seals (DDU) on both sides and C3 clearance for applications requiring looser internal fit. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034629/as-markdown/)

## Product's reviews:
- Agradecimiento. - Excelente servicio, confiable, rápido y efectivo.
Los seguiré llamando para mis necesidades.
- Bearing purchase - Good price and fast delivery!! Also a pleasure doing business with MROSupply.com!!
- Excellent! - The perfect part… and FAST shipping! Thank you!!
- Rateing - Fast service and very good supply.




## 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.