# Timken 2MMC9305WI SUL Super Precision Angular Contact Ball Bearing, 25mm Bore, Duplex Light Preload, ABEC 7 - MROSupply.com

***Timken 2MMC9305WI SUL is a super precision angular contact ball bearing designed for high-speed machine tool spindles. This duplex set (DUL) is configured for light preload, offering high rigidity and running accuracy with ABEC 7 (P4S) precision. The 25mm bore bearing is suitable for applications requiring minimal runout and high rotational speeds, such as precision grinders, jig borers, and CNC machining centers.***



## Product details:

- Catalog number: 2MMC9305WI SUL
- SKU: 5101523
- Price: ***$450.97*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Timken](https://www.mrosupply.com/brands/timken/)
- 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: 0.095 lb
- Returns: Yes


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


## Product attributes;

  
- 0.3543 in C0 - Static Radial Rating (per row): 5120 N
  

  
- 0.3543 in World part number: C71905C-T-P4S-SUL
  

  
- 1.140 in Limiting Speed (Grease) (per row): 41760 rpm Limiting speed (oil):83520 rpm Manufacturing part number:2MMC9305WI SUL O.D. (in):42 mm 1.6535 Outer ring backing diameter:38.7 mm
  

  
- 1.520 in Rows per set: Single Total width:9 mm
  

  
- 1150 lbf C1 ISO - Dynamic Radial Rating (per row): 8220 N
  

  
- 1840 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:15 Design units:Metric Inner ring backing diameter:28.9 mm
  

  
- Ball type: Ceramic Bearing width:9 mm
  

  
- Ball Type: Ceramic
  

  
- Bearing Width: 9 mm 0.3543 in
  

  
- Bore: 25 mm
  

  
- C1 ISO - Dynamic Radial Rating (per row): 8220 N 1840 lbf
  

  
- Cage Type: CPhenolic Outer Land Riding Cage
  

  
- Contact Angle: 15 º
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 38.7 mm 1.520 in
  

  
- Dynamic Radial Rating (per row): 9040 N 2030 lbf
  

  
- I.D.: 25 mm
  

  
- Inner Ring 'To Clear' Radius: 0.30 mm 0.012 in
  

  
- Inner Ring Backing Diameter: 28.9 mm 1.140 in
  

  
- Limiting Speed (Grease) (per row): 41760 rpm
  

  
- Limiting Speed (Oil): 83520 rpm
  

  
- Manufacturing Part Number: 2MMC9305WI SUL
  

  
- Outer Diameter: 42 mm 1.6535 in
  

  
- Outer Ring 'To Clear' Radius: 0.3 mm 0.012 in
  

  
- Rows per Set: Single
  

  
- Static Radial Rating (per row): 5120 N 1150 lbf
  

  
- Total Width: 9 mm 0.3543 in
  

  
- World Part Number: C71905C-T-P4S-SUL
  
## Product documents / software:

- [Catalog](https://documents.mrosupply.com/product_documents/50/60/5060627/Machine-Tool-Applications-Catalog_R9rBZA3.pdf)

## Product's reviews:
- Best company to buy from - I always buy from MRO is a very reliable company to work with




## 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.