# Kop-Flex 304 KD 21 SS900 2429538 KD Disc Coupling Size 304 Style KD21 9" Spacer 4.5" Max Bore - MROSupply.com

***Kop-Flex 304 KD 21 SS900 (Rexnord PN 2429538) Size 304 KD Disc Coupling, Style KD21, 9.00" spacer, 4.5" max bore, 9" outside diameter, non-lubricated. Double-engagement disc coupling for high-performance applications requiring zero backlash and maintenance-free operation.***



## Product details:

- Catalog number: 2429538
- SKU: 2294281
- Price: ***$9,396.77*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [KOP-FLEX](https://www.mrosupply.com/brands/kop-flex/)
- Category: 
    - [Double Disc Spacer Type](htts://www.mrosupply.com/shaft-couplings-and-collars/disc-couplings/complete-units/double-disc-spacer-type/)
    - [Complete Units](htts://www.mrosupply.com/shaft-couplings-and-collars/disc-couplings/complete-units/)
    - [Disc Couplings](htts://www.mrosupply.com/shaft-couplings-and-collars/disc-couplings/)
    - [Shaft Couplings and Collars](htts://www.mrosupply.com/shaft-couplings-and-collars/)
- Unit of measure: each
- Weight: 102.496 lb
- UPC: 662384153521
- Returns: Yes
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Axial Capacity (+/-): 0.17
  

  
- Bore Range (in): 1.5 to 4.5
  

  
- Bore Size Max: 4.5
  

  
- Bore Size Min: 1.5
  

  
- Bore Type: Rough Bore
  

  
- Configuration: 2 standard hubs
  

  
- Coupling Size: 304
  

  
- Coupling Type: Disc Coupling
  

  
- Disc Coupling Type: Spacer Coupling
  

  
- Disc Shape: Scalloped
  

  
- Hub Diameter (in): 6.16
  

  
- Hub Material: Carbon steel
  

  
- Length Through Bore (in): 3.56
  

  
- Length Through Bore standard hub (in): 3.56
  

  
- Lube/Non-Lube: Non-Lubricated
  

  
- Max Compatible Bore Size (long hub) (in): 4.5
  

  
- Max Torque (ft-lb): 14833
  

  
- Measurement System: Imperial
  

  
- Min Compatible Bore Size (long hub) (in): 1.5
  

  
- OD: 9
  

  
- Rating HP @ 100 RPM: 141
  

  
- Speed Max (rpm): 9900
  

  
- Stock D Dimension: 9
  

  
- Style: KD21
  

  
- Torque Rating (in-lb): 89000
  

  
- Total Length (One Hub Reverse) (in): Total Length (One Hub Reverse) (in)
  

  
- Total Length (Std Hub Post) (in): 16.12
  

  
- Total WR2 (lb-in2): 745
  
## Product documents / software:

- [ Instruction Sheet](https://documents.mrosupply.com/product_documents/30/304%20KD%2021%20SS900/Form15-110.pdf)
- [3D Drawing IGES](https://documents.mrosupply.com/product_documents/30/304%20KD%2021%20SS900/regalpts_PTS-KD21_MASTER-304_KD21_SS900_2TSbp2f.IGS)
- [Catalog Page](https://documents.mrosupply.com/product_documents/15/153%20KD%2021%20SHUB%20FB/KIP04-p38-39.pdf)