# SealMaster RPB 300-4 Mounted Tapered Roller Pillow Block 3" Bore Adapter Sleeve Double Collar Lock Type E - MROSupply.com

***SealMaster RPB 300-4 3" bore mounted tapered roller pillow block bearing unit, Type E interchange. Cast iron semi-solid housing with adapter sleeve mounting and double collar lock. Felt seal and re-lubricatable design for combined radial and axial loads in heavy industrial applications.***



## Product details:

- Catalog number: RPB 300-4
- SKU: 2255614
- Price: ***$1,055.66*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SealMaster](https://www.mrosupply.com/brands/sealmaster/)
- Category: 
    - [4-Bolt Pillow Block Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/pillow-block-bearings/4-bolt-pillow-block-bearings/)
    - [Pillow Block Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/pillow-block-bearings/)
    - [Mounted Roller Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-roller-bearings/)
    - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 31.500 lb
- UPC: 662288481546
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Ability to Relubricate: Yes
  

  
- Base to Center Height (in): 3.125
  

  
- Base Width (in): 3.75
  

  
- Bearing Insert Coating: Uncoated
  

  
- Bolt Center Max (in): 10
  

  
- Bolt Center Min (in): 8.75
  

  
- Bolt Center-to-Center Length (in): 9.375
  

  
- Bolt Size (in): 0.625
  

  
- Bore Shape: Straight
  

  
- Centerline to Front Face (in): 2.25
  

  
- Collar OD (in): 4.719
  

  
- Duty: Standard
  

  
- End Cap: No
  

  
- Expansion: No
  

  
- Foot Height (in): 1.75
  

  
- Grease Fitting Thread Size: 1/8 NPT
  

  
- Height: 4.63
  

  
- Housing: Pillow Block, Four Bolt
  

  
- Housing Base: Solid
  

  
- Housing Color: Gray
  

  
- Housing Construction: Split Two Piece
  

  
- Housing Material: Cast Iron
  

  
- Housing Style: Pillow Block
  

  
- I.D.: 3
  

  
- Inner Race Heat Treat Method: Case Carburized Inner Ring
  

  
- Inner Race Length (in): 4.5
  

  
- Insert Material: 52100 Bearing Steel
  

  
- Insert Number: RCI-300
  

  
- Internal Clearance: Standard
  

  
- Length: 12.13
  

  
- Locking: Double Collar Mount
  

  
- Lubrication Type: Lithium; EP; NLGI#2
  

  
- Max Operating Temperature (F): 220
  

  
- Maximum Speed (RPM): 1750
  

  
- Measure Unit: Inch
  

  
- Misalignment Capability: ±3.0° Misalignment - Static Only
  

  
- Misalignment Type: Static Only
  

  
- Outer Ring Land Profile: Standard
  

  
- Overall Height (in): 6.375
  

  
- Overall Length (in): 11.75
  

  
- Overall Width (in): 4.5
  

  
- Platform: RPB Series
  

  
- Radial Dynamic Load Capacity (lb): 9630
  

  
- Replaceable Insert: Yes
  

  
- Retainer Material: Steel
  

  
- Rolling element: Tapered Roller
  

  
- Seal: Felt Labyrinth Seal
  

  
- Series: RPB
  

  
- Width: 6.75
  
## Product documents / software:

- [Catalog Page](https://documents.mrosupply.com/product_documents/RP/RPB%20500-C4/MCC11012E_Sec_I14.pdf)
- [Drawing](https://documents.mrosupply.com/product_documents/RP/RPB%20500-C4/RPB-4.gif)
- [Instruction Sheet](https://documents.mrosupply.com/product_documents/RF/RFPA%20110C/740-0021%2520Rev%25205-02.pdf)
- [3D Drawing IGES](https://documents.mrosupply.com/product_documents/RP/RPB%20300-4/regalpts_beloit_EPTCAD-RPB-300-4-DEFAULT_LWcuTND.IGS)

## Product's reviews:
- Solutions - Fast service, and excellent competitive price.
- Excelent - excelent
- Bearing - It was delivered on time
- Response - Very knowledgeable sales rep. Excellent delivery time. Very important when supply chains are challenging.




## 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.