# Nexen 923900 Air Engaged Friction Clutch - Pilot Mount, 1.938 in Bore, 5500 inlb Torque, 1800 RPM - MROSupply.com

***Nexen 923900 air engaged friction clutch with pilot mount, 1.938 in machined bore with keyway and two setscrews, accepts 1.750 in optional adapter bushing. Delivers 5500 inlb static torque at 1800 RPM max speed. Open design with black oxide drive shell and aluminum air chamber, 5.250 in pilot size, 0.125 NPT air inlet. CE and RoHS certified.***



## Product details:

- Catalog number: 923900
- SKU: 533478
- Price: ***$3,254.86*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 3 days
- 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: 39.350 lb
- Technicall support: contact supplier for technical support on 800 843 7445


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


## Product attributes;

  
- Approximate clutch facing life: 473 hphr
  

  
- Bore details: Straight With Keyway And 2 Setscrews
  

  
- Bore size: 1.938 in, Machined Bore with Keyway, 1.750 in with Optional Adapter Bushing
  

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

  
- CE certified: CE
  

  
- Clutch air chamber volume when new: 0.845 in³
  

  
- Clutch facing edge color code: Red
  

  
- Clutch facing effective area: 124.40 in²
  

  
- Clutch Facing Type: Standard coefficient
  

  
- Clutch heat sink capacity: 14750 ftlb
  

  
- Clutch peak thermal input rate: 112.00 hp
  

  
- Clutch response factor: 0.14
  

  
- Drive arrangement: Pilot mount
  

  
- Drive inertia: 115.7 lbin²
  

  
- Enclosure: Open
  

  
- Engagement method: Air
  

  
- Finish: Bare Aluminum
  

  
- Inlet size: 0.125 NPT
  

  
- Length: 6.81 in
  

  
- Materials of construction: Aluminum Air Chamber Black Oxide Drive Shell
  

  
- Max ambient temperature (°F): 150
  

  
- Max bore size: 49.2252 mm
  

  
- Max clutch continuous thermal dissipation: 0.22 hp
  

  
- Max operating pressure (psi): 80
  

  
- Max Speed: 1800 RPM, Max @ 50 psi, 1200 @ 60 psi, 900 @ 70 psi, 700 @ 80 psi
  

  
- Max speed (psi): 1800 RPM, Max @ 50 psi, 1200 @ 60 psi, 900 @ 70 psi, 700 @ 80
  

  
- Max static clutch torque: 5500 inlb
  

  
- Min ambient temperature (°F): 32
  

  
- Min bore size: 44.45 mm
  

  
- Min engagement pressure (psi): 10
  

  
- Min sprocket size: 50/40T, 60/34T, 80/26T, 100/21T
  

  
- Mounting style: Shaft
  

  
- Open or enclosed design: Open
  

  
- Outer Diameter: 6.94 in
  

  
- Output bolt circle: 6.125 in
  

  
- Output bolt hole size: 4 0.312-18 in, Holes @ 90°
  

  
- Output shaft style: None
  

  
- Output type: Pilot
  

  
- Pilot size: 5.250 in
  

  
- Product features: Air Engaged, Straight Bore, Shaft Mount, Pilot Output, High Torque
  

  
- Release method: Spring
  

  
- Restrictions: Consult Nexen For Use In Cyclic Applications, Or Use As A Brake
  

  
- RoHS compliant: RoHS
  

  
- RPM: 1800
  

  
- Shaft inertia: 42.48 lbin²
  
## Product documents / software:

- [Cutaway](https://documents.mrosupply.com/product_documents/92/923900/4HPClutchCutaway.gif)
- [PDF Cad Drawing](https://documents.mrosupply.com/product_documents/92/923900/923900s.pdf)
- [Thermalgraph](https://documents.mrosupply.com/product_documents/92/923900/4H60ThermalGraph.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.
- None - all good
- 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.