# Nexen 828903 Air Engaged Clutch / Spring Engaged Brake Combination Clutch Brake - Shaft Mount, 1 in Bore, 1800 RPM, 350 inlb Clutch Torque, 400 inlb Brake Torque - MROSupply.com

***Nexen 828903 is a shaft mount combination clutch brake with an air engaged clutch and spring engaged fail-safe brake. It features a 1 in machined bore with keyway, 1800 RPM max speed, 350 inlb max static clutch torque, and 400 inlb max static brake torque. The unit includes a V-belt pulley output (2-A, 5.40 in PD sheave) and black oxide finish. Designed for driven shaft mounting with anti-rotation holes and optional torque pin bracket.***



## Product details:

- Catalog number: 828903
- SKU: 533829
- Price: ***$1,822.03*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Nexen](https://www.mrosupply.com/brands/nexen/)
- Category: 
    - [Pneumatic Clutches](htts://www.mrosupply.com/clutches-and-brakes/pneumatic-clutches-brakes/pneumatic-clutches/)
    - [Pneumatic Clutches & Brakes](htts://www.mrosupply.com/clutches-and-brakes/pneumatic-clutches-brakes/)
    - [Clutches and Brakes](htts://www.mrosupply.com/clutches-and-brakes/)
- Unit of measure: each
- Weight: 19.000 lb
- Technicall support: contact supplier for technical support on 800 843 7445


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


## Product attributes;

  
- Anti rotation style: Anti-Rotation Holes, Optional Torque Pin Bracket
  

  
- Approximate brake facing life: 230 hphr
  

  
- Approximate clutch facing life: 572 hphr
  

  
- Bore details: Straight
  

  
- Bore size: 1.000 in, Machined Bore with Keyway, 0.500-0.750 in with Optional Adapter Bushings
  

  
- Bore style: Machined Bore with Keyway, Nexen Adapter Bushing Required
  

  
- Brake air chamber volume when new: 0.629 in³
  

  
- Brake air chamber volume when worn out: 1.422 in³
  

  
- Brake facing edge color code: Red
  

  
- Brake facing effective area: 11.9 in²
  

  
- Brake facing type: Standard coefficient
  

  
- Brake heat sink capacity: 25000 ftlb
  

  
- Brake peak thermal input rate: 11.00 hp
  

  
- Brake response factor: 0.09
  

  
- Brake side engagement method: Spring
  

  
- Brake torque: 400 inlb
  

  
- CE certified: CE
  

  
- Clutch air chamber volume when new: 0.327 in³
  

  
- Clutch air chamber volume when worn out: 0.864 in³
  

  
- Clutch facing edge color code: Red
  

  
- Clutch facing effective area: 18.62 in²
  

  
- Clutch Facing Type: Standard coefficient
  

  
- Clutch heat sink capacity: 45000 ftlb
  

  
- Clutch peak thermal input rate: 17.00 hp
  

  
- Clutch response factor: 0.06
  

  
- Clutch side engagement method: Air
  

  
- Finish: Black oxide
  

  
- Inlet size: 0.125 NPT
  

  
- Input shaft securement: 2, 0.250-20 Set Screws @ 90° Output End; 3, 0.164-32 Set Screws @ 120° On Brake End
  

  
- Length: 6.19 in
  

  
- Materials of construction: Black oxide
  

  
- Max allowable pressure (psi): 120
  

  
- Max ambient temperature (°F): 150
  

  
- Max bore size: 25.4 mm
  

  
- Max brake continuous thermal dissipation: 0.52 hp
  

  
- Max clutch continuous thermal dissipation: 0.40 hp
  

  
- Max operating pressure (psi): 80
  

  
- Max Speed: 1800 RPM
  

  
- Max static brake torque: 400 inlb
  

  
- Max static clutch torque: 350 inlb
  

  
- Min ambient temperature (°F): 32
  

  
- Min bore size: 15.875 mm
  

  
- Min engagement pressure (psi): 5
  

  
- Mounting style: Driven Shaft
  

  
- Open or enclosed design: Open
  

  
- Outer Diameter: 6.00 in
  

  
- Output shaft style: None
  

  
- Output type: V-Belt Pulley, 2-A, 5.40 in PD Sheave
  

  
- Product features: Air Engaged Brake, Air Engaged Clutch, Driven Shaft Mount, Straight Bore, Double Piston
  

  
- Restrictions: Must Be Mounted On The Driven Shaft
  

  
- RoHS compliant: RoHS
  

  
- Shaft inertia: 14.2 lbin²
  
## Product documents / software:

- [Burnishing Guide](https://documents.mrosupply.com/product_documents/64/23/6423331/BurnishingProcedureA_068kJu3.pdf)
- [PDF CAD Drawing](https://documents.mrosupply.com/product_documents/53/38/533829/828800S_AYvXYvs.pdf)
- [Thermal Graph](https://documents.mrosupply.com/product_documents/13/67/1367243/LWCBStStThermalGraph_ipL7qb2.jpg)
- [Torque Graph](https://documents.mrosupply.com/product_documents/13/67/1367243/LWCBStStTorqueGraph_A6gaLzL.jpg)
- [User Manual](https://documents.mrosupply.com/product_documents/53/38/533829/20246_7EnRs8M.pdf)
- [DXF CAD Drawing](https://documents.mrosupply.com/product_documents/53/38/533829/828800S_CSZzmy5.dxf)
- [STEP CAD File](https://documents.mrosupply.com/product_documents/53/38/533829/1622011_cb1tUpC.stp)

## Product's reviews:
- None - all good
- Great service - Provide great pricing, accurate order processing, and timely delivery. I recommend MRO for your electronic needs.
- Great prices and great service - I continue to use MRO for various production parts I need. They beat the competition hands down. And the delivery is timely.