# Timken 3MMC9108WI QUL Super Precision Angular Contact Ball Bearing, 45mm Bore, Quadruplex Light Preload, ABEC 7 - MROSupply.com

***Timken 3MMC9108WI QUL super precision angular contact ball bearing, 45mm bore, quadruplex light preload (QUL), ABEC 7 (P4S) precision. Designed for high rigidity and minimal runout in machine tool spindles, precision grinders, and high-speed rotary tables. Quadruplex set configuration ensures extreme accuracy and stability under demanding conditions.***



## Product details:

- Catalog number: 3MMC9108WI QUL
- SKU: 5084286
- Call for Pricing - 888-671-2883
- 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: 1.649 lb
- Returns: Yes


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


## Product attributes;

  
- 0.5906 in C0 - Static Radial Rating (per row): 12640 N
  

  
- 1.800 in Limiting Speed (Grease) (per row): 21480 rpm Limiting speed (oil):42960 rpm Manufacturing part number:3MMC9108WI QUL O.D. (in):68 mm 2.6772 Outer ring backing diameter:62.2 mm
  

  
- 2.3624 in World part number: C7008E-T-P4S-QUL
  

  
- 2.450 in Precision rating: ISO P4S (ABEC 7/9) Rows per set:Quadruplex Total width:60 mm
  

  
- 2840 lbf C1 ISO - Dynamic Radial Rating (per row): 18900 N
  

  
- 4240 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:45.7 mm
  

  
- Ball type: Ceramic Bearing width:15 mm
  

  
- I.D.: 40 mm
  
## 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.