# Timken 3MMC204WI SUM Super Precision Angular Contact Ball Bearing, Triplex Medium Preload, P4S - MROSupply.com

***Timken 3MMC204WI SUM super precision angular contact ball bearing set, triplex (three bearings) with medium preload (TUM). P4S (ABEC 7/9) precision class for high-rigidity machine tool spindles, jig borers, and precision grinding applications requiring exceptional running accuracy and axial load capacity.***



## Product details:

- Catalog number: 3MMC204WI SUM
- SKU: 5102099
- Price: ***$372.13*** 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: 0.227 lb
- Returns: Yes


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


## Product attributes;

  
- 0.5512 in C0 - Static Radial Rating (per row): 6900 N
  

  
- 0.5512 in World part number: C7204E-T-P4S-SUM
  

  
- 1.020 in Limiting Speed (Grease) (per row): 38500 RPM Limiting speed (oil):77000 RPM Manufacturing part number:3MMC204WI SUM O.D. (in):47 mm 1.8504 Outer ring backing diameter:41.5 mm
  

  
- 1.640 in Precision rating: ISO P4S (ABEC 7/9) Rows per set:Single Total width:14 mm
  

  
- 1550 lbf C1 ISO - Dynamic Radial Rating (per row): 14100 N
  

  
- 3170 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:25.8 mm
  

  
- Ball type: Ceramic Bearing width:14 mm
  

  
- Ball Type: Ceramic
  

  
- Bearing Width: 14 mm 0.5512 in
  

  
- Bore: 20 mm
  

  
- C1 ISO - Dynamic Radial Rating (per row): 14100 N 3170 lbf
  

  
- Cage Type: CPhenolic Outer Land Riding Cage
  

  
- Contact Angle: 25 º
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 41.5 mm 1.640 in
  

  
- Dynamic Radial Rating (per row): 15500 N 3490 lbf
  

  
- I.D.: 20 mm
  

  
- Inner Ring 'To Clear' Radius: 1 mm 0.039 in
  

  
- Inner Ring Backing Diameter: 25.8 mm 1.020 in
  

  
- Limiting Speed (Grease) (per row): 38500 rpm
  

  
- Limiting Speed (Oil): 77000 rpm
  

  
- Manufacturing Part Number: 3MMC204WI SUM
  

  
- Outer Diameter: 47 mm 1.8504 in
  

  
- Outer Ring 'To Clear' Radius: 1 mm 0.039 in
  

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

  
- Rows per Set: Single
  

  
- Static Radial Rating (per row): 6900 N 1550 lbf
  

  
- Total Width: 14 mm 0.5512 in
  

  
- World Part Number: C7204E-T-P4S-SUM
  
## 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.