# Kop-Flex 4F EB FR 2280543 FASTS Gear Coupling Size 4 Extended Bore Rough Bore 12.5" OD 4.25" Max Bore - MROSupply.com

***Kop-Flex 4F EB FR (Rexnord PN 2280543) Size 4 FASTS gear coupling with extended bore and rough bore, 12.5" outside diameter, 4.25" maximum bore. Lifetime metallic seal and 300% greater lubricant capacity ensure reliable performance in high-torque applications. Designed for drop-in replacement with competitor gear couplings sizes 1-7.***



## Product details:

- Catalog number: 2280543
- SKU: 2292969
- Price: ***$4,287.05*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [KOP-FLEX](https://www.mrosupply.com/brands/kop-flex/)
- Category: 
    - [Complete Units](htts://www.mrosupply.com/shaft-couplings-and-collars/gear-couplings/complete-units/)
    - [Gear Couplings](htts://www.mrosupply.com/shaft-couplings-and-collars/gear-couplings/)
    - [Shaft Couplings and Collars](htts://www.mrosupply.com/shaft-couplings-and-collars/)
- Unit of measure: each
- Weight: 181.440 lb
- UPC: 662384010329
- Returns: Yes
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Bolt Circle: 11
  

  
- Bolt Type: Exposed
  

  
- Bore Size Max: 4.25
  

  
- Bore Type: Rough Bore
  

  
- Configuration: Flex Rigid
  

  
- Coupling Size: 4
  

  
- Coupling Type: Gear Coupling
  

  
- Fastener Quantity: 8
  

  
- Fastener Size & Length: 3/4 x 3 3/8
  

  
- Hub Diameter (in): 9
  

  
- Includes: Hubs (1) Sleeve (1) Rigid (1) Seal (2)
  

  
- Length Through Bore (in): 4.4375
  

  
- Lube/Non-Lube: Lubricated
  

  
- Material: Medium Carbon Steel
  

  
- Max Bore w/standard key for Flex Hub: 4.25
  

  
- Measurement System: Imperial
  

  
- Min Compatible Bore Size (in): 0
  

  
- Min Compatible Bore Size Flex Hub (in): 2.625
  

  
- Min Compatible Bore Size Rigid Hub (in): 2.5
  

  
- OD: 12.5
  

  
- Overall Length (in): 9.75
  

  
- Performance: Lubrication Hole
  

  
- Rating HP @ 100 RPM: 375
  

  
- Sleeve Type: Flanged
  

  
- Speed Max (rpm): 5260
  

  
- Style: FASTS
  

  
- Temperature Range: -40 to +190 °F
  

  
- Tooth Profile: Straight Faced Involute Hub tooth
  

  
- Torque [Max] (in-lb): 472000
  

  
- Torque Rating (in-lb): 236000
  
## Product documents / software:

- [3D Drawing IGES](https://documents.mrosupply.com/product_documents/4F/4F%20EB%20FR/regalpts_EMERSON-1-5-7_FR-4F_EB_FR_v67kjgk.IGS)
- [Catalog Page](https://documents.mrosupply.com/product_documents/1%20/1%201/2F%20EB%20FR%20FB/KIP04-p138.pdf)
- [Installation Manual - Revised 2016](https://documents.mrosupply.com/product_documents/22/93/2293010/multi-brands2F199_krkKRol.pdf)
- [Instruction Sheet](https://documents.mrosupply.com/product_documents/4F/4F%20EB%20FR/FORM1900-01.PDF)