# Timken 3MMC9126WI DUM Super Precision Angular Contact Ball Bearing, Duplex Medium Preload, P4S Precision - MROSupply.com

***Timken 3MMC9126WI DUM super precision angular contact ball bearing, duplex matched set with medium preload. P4S-grade ABEC 7/9 precision for high rigidity and minimal runout in machine tool spindles, precision grinders, and high-speed applications requiring accurate axial location and smooth operation.***



## Product details:

- Catalog number: 3MMC9126WI DUM
- SKU: 5084404
- 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: 14.431 lb
- Returns: Yes


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


## Product attributes;

  
- 1.2992 in C0 - Static Radial Rating (per row): 115611 N
  

  
- 2.5984 in World part number: C7026E-T-P4S-DUM
  

  
- 25988 lbf C1 ISO - Dynamic Radial Rating (per row): 123000 N
  

  
- 27700 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:144.2 mm
  

  
- 5.680 in Limiting Speed (Grease) (per row): 6960 RPM Limiting speed (oil):13920 rpm Manufacturing part number:3MMC9126WI DUM O.D. (in):200 mm 7.874 Outer ring backing diameter:186.6 mm
  

  
- 7.350 in Precision rating: ISO P4S (ABEC 7/9) Rows per set:Duplex Total width:66 mm
  

  
- Ball type: Ceramic Bearing width:33 mm
  

  
- Ball Type: Ceramic
  

  
- Bearing Width: 33 mm 1.2992 in
  

  
- Bore: 130 mm
  

  
- C0 - Static Radial Rating (per row): 115611 N 25988 lbf
  

  
- C1 ISO - Dynamic Radial Rating (per row): 123000 N 27700 lbf
  

  
- Cage Type: CR - Phenolic Outer Land Riding Cage
  

  
- Ce - Dynamic Radial Rating (per row): 135700 N 30500 lbf
  

  
- Contact Angle: 25 º
  

  
- d - Bore: 130 mm
  

  
- D - Outer Diameter: 200 mm 7.8740 in
  

  
- da - Inner Ring Backing Diameter: 144.2 mm 5.680 in
  

  
- Da - Outer Ring Backing Diameter: 186.6 mm 7.350 in
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 186.6 mm 7.350 in
  

  
- Dynamic Radial Rating (per row): 135700 N 30500 lbf
  

  
- I.D.: 130 mm
  

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

  
- Inner Ring Backing Diameter: 144.2 mm 5.680 in
  

  
- Limiting Speed (Grease) (per row): 6960 rpm
  

  
- Limiting Speed (Oil): 13920 rpm
  

  
- Manufacturing Part Number: 3MMC9126WI DUM
  

  
- Outer Diameter: 200 mm 7.8740 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): 115611 N 25988 lbf
  

  
- Total Width: 66.000 mm 2.5984 in
  

  
- World Part Number: C7026E-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.