# NSK 6906DDUC3 Sealed Deep Groove Ball Bearing - 30 mm Bore, Double Sealed, C3 Clearance - MROSupply.com

***NSK 6906DDUC3 sealed deep groove ball bearing with 30 mm bore and 47 mm OD. Double contact rubber seals (DDU) provide effective contaminant exclusion, and C3 internal clearance accommodates thermal expansion. Suitable for electric motors, pumps, fans, and general industrial applications.***



## Product details:

- Catalog number: 6906DDUC3
- SKU: 5034640
- Price: ***$126.01*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NSK Bearings](https://www.mrosupply.com/brands/nsk-bearings/)
- Category: 
    - [6900 Series Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/6900-series-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.108 lb
- Returns: Yes


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



## Alternate products to `NSK 6906DDUC3 Sealed Deep Groove Ball Bearing - 30 mm Bore, Double Sealed, C3 Clearance - MROSupply.com`:
- [SKF 61906-2RS1 is a 30mm bore deep groove ball bearing, double sealed with NBR rubber seals on both sides. It features a sheet metal cage and is made of bearing steel. Suitable for electric motors, pumps, and general industrial applications.](https://www.mrosupply.com/products/326307/as-markdown/)
- [SKF 61906-2RZ 30mm bore deep groove ball bearing with low-friction non-contact rubber seals on both sides. Features a sheet metal cage and bearing steel construction. Suitable for applications requiring reduced friction and protection from contaminants.](https://www.mrosupply.com/products/326259/as-markdown/)
- [Koyo 6906 2RU deep groove ball bearing with 30 mm bore, 47 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/1495174/as-markdown/)
- [NSK 6906DDU deep groove ball bearing with 30 mm bore and 47 mm OD. Double contact rubber seals (DDU) provide effective contaminant exclusion. Pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034639/as-markdown/)
- [NSK 6906VV deep groove ball bearing with 30 mm bore and 47 mm OD. Double non-contact rubber seals (VV) provide low-friction sealing. Pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034641/as-markdown/)
- [NTN 6906LLB 6900 series single-row deep groove ball bearing with a 30 mm bore. 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/278156/as-markdown/)
- [Nachi Bearing 6906-2NSECM Deep Groove Ball Bearing with 2 Seals](https://www.mrosupply.com/products/5900145/as-markdown/)
- [Nachi Bearing 6906-2NSEC3 Deep Groove Ball Bearing with 2 Seals](https://www.mrosupply.com/products/5744957/as-markdown/)

## Product's reviews:
- Had what i needed - Found the bearing I needed. Reasonable price. Great phone support.
- Sales - Great Service !!
- Purchasing specialist - Great!!!




## 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.