# Timken 2MM9102WI QUM Super Precision Angular Contact Ball Bearing, Quadruplex Medium Preload, ABEC 7 (P4S) - MROSupply.com

***Timken 2MM9102WI QUM super precision angular contact ball bearing, quadruplex set with medium preload (QUM), ABEC 7 (P4S) precision class. Engineered for high-rigidity machine tool spindles, jig borers, and high-speed grinding applications requiring exceptional rotational accuracy and load capacity. Quadruplex arrangement provides maximum axial and radial stiffness for demanding industrial and precision machining operations.***



## Product details:

- Catalog number: 2MM9102WI QUM
- SKU: 5081459
- 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: 0.265 lb
- Returns: Yes


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


## Product attributes;

  
- 0.3543 in C0 - Static Radial Rating (per row): 3600 N
  

  
- 0.750 in Limiting Speed (Grease) (per row): 48600 rpm Limiting speed (oil):97200 rpm Manufacturing part number:2MM9102WI QUM O.D. (in):32 mm 1.2598 Outer ring backing diameter:28.6 mm
  

  
- 1.130 in Rows per set: Quadruplex Total width:36 mm
  

  
- 1.4172 in World part number: 7002C-T-P4S-QUM
  

  
- 1480 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:15 Design units:Metric Inner ring backing diameter:18.9 mm
  

  
- 820 lbf C1 ISO - Dynamic Radial Rating (per row): 6610 N
  

  
- Ball type: Steel Bearing width:9 mm
  

  
- Ball Type: STEEL
  

  
- Bearing Width: 9 mm 0.3543 in
  

  
- Bore: 15 mm
  

  
- C0 - Static Radial Rating (per row): 3600 N 820 lbf
  

  
- C1 ISO - Dynamic Radial Rating (per row): 6610 N 1480 lbf
  

  
- Cage Type: CR - Phenolic Outer Land Riding Cage
  

  
- Ce - Dynamic Radial Rating (per row): 7300 N 1630 lbf
  

  
- Contact Angle: 15 º
  

  
- d - Bore: 15 mm
  

  
- D - Outer Diameter: 32 mm 1.2598 in
  

  
- da - Inner Ring Backing Diameter: 18.9 mm 0.750 in
  

  
- Da - Outer Ring Backing Diameter: 28.6 mm 1.130 in
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 28.6 mm 1.130 in
  

  
- Dynamic Radial Rating (per row): 7300 N 1630 lbf
  

  
- I.D.: 15 mm
  

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

  
- Inner Ring Backing Diameter: 18.9 mm 0.750 in
  

  
- Limiting Speed (Grease) (per row): 48600 rpm
  

  
- Limiting Speed (Oil): 97200 rpm
  

  
- Manufacturing Part Number: 2MM9102WI QUM
  

  
- Outer Diameter: 32 mm 1.2598 in
  

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

  
- R - Inner Ring "To Clear" Radius: 0.30 mm 0.012 in
  

  
- r - Outer Ring "To Clear" Radius: 0.3 mm 0.012 in
  

  
- Rows per Set: Quadruplex
  

  
- Static Radial Rating (per row): 3600 N 820 lbf
  

  
- Total Width: 36 mm 1.4172 in
  

  
- World Part Number: 7002C-T-P4S-QUM
  
## 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.