# Timken 2MM310WI DUM Super Precision Angular Contact Ball Bearing, Duplex Medium Preload, P4S Precision Class - MROSupply.com

***Timken 2MM310WI DUM super precision angular contact ball bearing, duplex set with medium preload (DUM), P4S precision class meeting ABEC 7/9 standards. Back-to-back arrangement provides rigid axial location and accommodates combined radial and thrust loads. Ideal for high-speed, high-rigidity applications including machine tool spindles, precision grinders, and jig borers.***



## Product details:

- Catalog number: 2MM310WI DUM
- SKU: 5067140
- 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: 4.612 lb
- Returns: Yes


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


## Product attributes;

  
- 1.063 in C0 - Static Radial Rating (per row): 46200 N
  

  
- 10400 lbf C1 ISO - Dynamic Radial Rating (per row): 70800 N
  

  
- 15900 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:15 Design units:Metric Inner ring backing diameter:60.7 mm
  

  
- 2.126 in World part number: 7310C-T-P4S-DUM
  

  
- 2.390 in Limiting Speed (Grease) (per row): 13600 RPM Limiting speed (oil):27200 RPM Manufacturing part number:2MM310WI DUM O.D. (in):110 mm 4.3307 Outer ring backing diameter:99.8 mm
  

  
- 3.930 in Precision rating: ISO P4S (ABEC 7/9) Rows per set:Duplex Total width:54 mm
  

  
- Ball type: Steel Bearing width:27 mm
  

  
- Ball Type: STEEL
  

  
- Bearing Width: 27 mm 1.063 in
  

  
- Bore: 50 mm
  

  
- C0 - Static Radial Rating (per row): 46200 N 10400 lbf
  

  
- C1 ISO - Dynamic Radial Rating (per row): 70800 N 15900 lbf
  

  
- Cage Type: CR - Phenolic Outer Land Riding Cage
  

  
- Ce - Dynamic Radial Rating (per row): 77900 N 17500 lbf
  

  
- Contact Angle: 15 º
  

  
- d - Bore: 50 mm
  

  
- D - Outer Diameter: 110 mm 4.3307 in
  

  
- da - Inner Ring Backing Diameter: 60.7 mm 2.390 in
  

  
- Da - Outer Ring Backing Diameter: 99.8 mm 3.930 in
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 99.8 mm 3.930 in
  

  
- Dynamic Radial Rating (per row): 77900 N 17500 lbf
  

  
- I.D.: 50 mm
  

  
- Inner Ring 'To Clear' Radius: 2 mm 0.079 in
  

  
- Inner Ring Backing Diameter: 60.7 mm 2.390 in
  

  
- Limiting Speed (Grease) (per row): 13600 rpm
  

  
- Limiting Speed (Oil): 27200 rpm
  

  
- Manufacturing Part Number: 2MM310WI DUM
  

  
- Outer Diameter: 110 mm 4.3307 in
  

  
- Outer Ring 'To Clear' Radius: 2 mm 0.079 in
  

  
- Precision Rating: ISO P4S (ABEC 7/9)
  

  
- R - Inner Ring "To Clear" Radius: 2 mm 0.079 in
  

  
- r - Outer Ring "To Clear" Radius: 2 mm 0.079 in
  

  
- Rows per Set: Duplex
  

  
- Static Radial Rating (per row): 46200 N 10400 lbf
  

  
- Total Width: 54.000 mm 2.1260 in
  

  
- World Part Number: 7310C-T-P4S-DUM
  
## 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.