# NTN 6321ZZC3/EM Deep Groove Ball Bearing - 105 mm Bore, Double Shielded, C3 Clearance, Machined Brass Cage - MROSupply.com

***NTN 6321ZZC3/EM is a 63 series single-row deep groove ball bearing with a 105 mm straight bore. It features double shielded (ZZ) metal shields, C3 internal clearance, and a machined brass cage. Constructed from high carbon chrome steel, this bearing is designed for general industrial rotating equipment such as electric motors, pumps, and fans.***



## Product details:

- Catalog number: 6321ZZC3/EM
- SKU: 830590
- Price: ***$923.96*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [6300 Series Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/6300-series-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 18.056 lb
- UPC: 4547359581683


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


## Product attributes;

  
- Axial Static Load Rating: 34396 lbf
  

  
- Axial static load rating: 34396 lbf
  

  
- B (in): 1.9290
  

  
- Ball Material: Through Hardened Steel
  

  
- Ball material: Through hardened steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Pressed Steel
  

  
- Cage material: Pressed steel
  

  
- Cage Type: Pressed
  

  
- Cage type: Pressed
  

  
- Configuration: One
  

  
- D (in): 8.8580
  

  
- d (in): 4.1340
  

  
- Da max: 8.3465 in
  

  
- da max: 5.2756 in
  

  
- da min: 4.6457 in
  

  
- Dynamic Load Rating: 45863 lbf
  

  
- Dynamic load rating: 45863 lbf
  

  
- Enclosure: Metal Shield - Both Sides
  

  
- Factor: 13.2
  

  
- Height: 8.858
  

  
- I.D.: 105 mm
  

  
- Length: 8.858
  

  
- Limiting Speed - Grease: 3000 RPM
  

  
- Limiting speed - grease: 3000 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 225 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Outside Ring Type: 0
  

  
- Precision: ISO class 0
  

  
- r (in): 0.1181
  

  
- Radial Dynamic Load Rating: 45861 lbf
  

  
- Radial Internal Clearance: C3
  

  
- Radial internal clearance: C3
  

  
- ras max: 0.0984 in
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- Static Load Rating: 34397 lbf
  

  
- Static load rating: 34397 lbf
  

  
- Type: Deep Groove Ball Bearing
  

  
- Width: 1.9291
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048444/1149_S_Mp8Gsc0.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/63/6321ZZC3/EM/bearingfinder_2d_pdf_fixed_6321ZZC32FEM_gYBKBCy.pdf)
## Alternate products to `NTN 6321ZZC3/EM Deep Groove Ball Bearing - 105 mm Bore, Double Shielded, C3 Clearance, Machined Brass Cage - MROSupply.com`:
- [NTN 6321ZZ is a 63 series single-row deep groove ball bearing with a 105 mm straight bore. It features double shielded (ZZ) metal shields for protection against contaminants while maintaining low friction. Suitable for electric motors, pumps, fans, and general rotating machinery.](https://www.mrosupply.com/products/278492/as-markdown/)
- [NSK 6321ZZC3 deep groove ball bearing with 105 mm bore, shielded both sides (ZZ), and C3 clearance. It features a pressed steel cage and is designed for high radial and moderate axial loads. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034428/as-markdown/)
- [Koyo 6321 ZZ is a 63 series single-row deep groove ball bearing with a 105 mm straight bore. It features double steel shields (ZZ) and a pressed steel cage. Designed for radial and moderate axial loads in electric motors, pumps, fans, and general industrial rotating equipment.](https://www.mrosupply.com/products/1495028/as-markdown/)
- [NACHI 6321ZZC3 Deep Groove Ball Bearing Single Row 105X225X49MM Two Shields Steel Cage C3 Clearance](https://www.mrosupply.com/products/5900125/as-markdown/)
- [NTN 6321ZZC3 is a 63 series single-row deep groove ball bearing with a 105 mm straight bore. Features double steel shields and C3 clearance. Used in electric motors, pumps, fans, and general rotating machinery.](https://www.mrosupply.com/products/278491/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.