# Timken 3MM9109WI SUH Super Precision Angular Contact Ball Bearing, Triplex Set, Heavy Preload, ABEC 7 (P4S) - MROSupply.com

***Timken 3MM9109WI SUH super precision angular contact ball bearing, triplex set with heavy preload (SUH). ABEC 7 (P4S) precision class for high-rigidity machine tool spindles, boring heads, and applications requiring maximum axial stiffness and minimal runout. Matched triplex configuration provides exceptional load capacity and rotational accuracy.***



## Product details:

- Catalog number: 3MM9109WI SUH
- SKU: 5080989
- 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: 0.529 lb
- Returns: Yes


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


## Product attributes;

  
- 0.6299 in C0 - Static Radial Rating (per row): 18300 N
  

  
- 0.6299 in World part number: 7009E-T-P4S-SUH
  

  
- 2.020 in Limiting Speed (Grease) (per row): 16100 rpm Limiting speed (oil):32200 rpm Manufacturing part number:3MM9109WI SUH O.D. (in):75 mm 2.9528 Outer ring backing diameter:69.3 mm
  

  
- 2.730 in Precision rating: ISO P4S (ABEC 7/9) Rows per set:Single Total width:16 mm
  

  
- 4110 lbf C1 ISO - Dynamic Radial Rating (per row): 23400 N
  

  
- 5240 lbf Cage type: CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:51.3 mm
  

  
- Ball type: Steel Bearing width:16 mm
  

  
- Ball Type: STEEL
  

  
- Bearing Width: 16 mm 0.6299 in
  

  
- Bore: 45 mm
  

  
- C1 ISO - Dynamic Radial Rating (per row): 23400 N 5240 lbf
  

  
- Cage Type: CPhenolic Outer Land Riding Cage
  

  
- Contact Angle: 25 º
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 69.3 mm 2.730 in
  

  
- Dynamic Radial Rating (per row): 25600 N 5760 lbf
  

  
- I.D.: 45 mm
  

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

  
- Inner Ring Backing Diameter: 51.3 mm 2.020 in
  

  
- Limiting Speed (Grease) (per row): 16100 rpm
  

  
- Limiting Speed (Oil): 32200 rpm
  

  
- Manufacturing Part Number: 3MM9109WI SUH
  

  
- Outer Diameter: 75 mm 2.9528 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): 18300 N 4110 lbf
  

  
- Total Width: 16 mm 0.6299 in
  

  
- World Part Number: 7009E-T-P4S-SUH
  
## 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.