# Nexen 820300 Spring Engaged Shaft Mount Brake, QD Bore 0.5 in to 1.375 in, 785 inlb Torque, 1800 RPM - MROSupply.com

***Nexen 820300 spring engaged, air released shaft mount brake with QD taper bushing bore range 0.5 in to 1.375 in. Delivers 785 inlb static brake torque at 1800 RPM. Black oxide finish, open design, high coefficient brake facing. Suitable for cyclic dynamic, e-stop, and holding applications.***



## Product details:

- Catalog number: 820300
- SKU: 535036
- Price: ***$1,508.30*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 3 days
- Brand: [Nexen](https://www.mrosupply.com/brands/nexen/)
- Category: 
    - [Pneumatic Brakes](htts://www.mrosupply.com/clutches-and-brakes/pneumatic-clutches-brakes/pneumatic-brakes/)
    - [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: 19.500 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: 343 hphr
  

  
- Bore details: QD Type SH
  

  
- Bore size: 0.500 in to 1.375 in Customer Taper Bushing Required
  

  
- Bore style: Customer Taper Bushing Required
  

  
- Brake air chamber volume when new: 3.900 in³
  

  
- Brake air chamber volume when worn out: 1.900 in³
  

  
- Brake facing edge color code: Purple
  

  
- Brake facing effective area: 18.6 in²
  

  
- Brake facing type: High Coefficient
  

  
- Brake heat sink capacity: 60000 ftlb
  

  
- Brake peak thermal input rate: 17.00 hp
  

  
- Brake response factor: 0.124
  

  
- Brake torque: 785 inlb
  

  
- Braking capability: Cyclic Dynamic, E-Stop, Holding
  

  
- CE certified: CE
  

  
- Enclosure: Open
  

  
- Engagement method: Spring
  

  
- Finish: Black oxide
  

  
- Inlet size: 0.125 NPT
  

  
- Length: 4.25 in
  

  
- Materials of construction: Black oxide
  

  
- Max allowable pressure (psi): 120
  

  
- Max ambient temperature (°F): 150
  

  
- Max bore size: 34.925 mm
  

  
- Max brake continuous thermal dissipation: 1.30 hp
  

  
- Max Speed: 1800 RPM
  

  
- Max static brake torque: 785 inlb
  

  
- Min ambient temperature (°F): 32
  

  
- Min bore size: 12.7 mm
  

  
- Min release pressure (bar): 4.9644 bar
  

  
- Min release pressure (psi): 72
  

  
- Mounting style: Shaft
  

  
- Open or enclosed design: Open
  

  
- Outer Diameter: 7.19 in
  

  
- Output shaft style: None
  

  
- Product features: Spring Engaged, Shaft Mount, Taper Bore
  

  
- Release method: Air
  

  
- Restrictions: This Brake Should Not Be Flange Mounted Or May Be Damaged
  

  
- RoHS compliant: RoHS
  

  
- RPM: 1800
  

  
- Shaft inertia: 20.16 lbin²
  

  
- Unit height: 5.5 in
  

  
- Unit width: 10 in
  
## Product documents / software:

- [Cutaway](https://documents.mrosupply.com/product_documents/82/820300/TSEBrakeCutaway.gif)
- [PDF Cad Drawing](https://documents.mrosupply.com/product_documents/82/820300/820300s.pdf)
- [Thermalgraph](https://documents.mrosupply.com/product_documents/82/820300/TSE600ThermalGraph.jpg)
- [Torquegraph](https://documents.mrosupply.com/product_documents/82/820300/TSE600-8HiTorqueGraph.jpg)
- [User Manual](https://documents.mrosupply.com/product_documents/88/887021/21180.pdf)

## Product's reviews:
- 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.
- None - all good