Underdeck Rotary Screw


Boss Air 100CFM Rotary Screw Underdeck Air Compressor


The 80100-UHBI takes up no space, frees up your tow hitch, and is cost efficent. In addition, the compressor is lightweight, having fewer parts and runs off a vehicle engine. If the truck runs, the compressor runs when activated!

The advanced design allows you the option to choose up to 85 CFM and up to 150 PSI. Generators, welders, and specifically hydraulic systems are intergrated with the 80100-UHBI kit or in-house installation.


Delivery @ 100psig*30 cfm45 cfm60 cfm85 cfm
Input Speed to Compressor Shaft (rpm)960139518152500
Fluid Capacity (gal)
Compressor Air-end10" W x 16" H x 15" L
Receiver Sump12" dia x 22" L
Spin-on Coalescer5.5" dia x 12" H
12V DC Remote Cooler Assembly**27" W x 16.75" H x 10.25" L
Gauge Package3.75 W x 4.25" H x 3" L
Weight (dry)425 lbs.


Input needs may vary depending on chassis application.

* 125psig and 150psig available. Consult factory.

** 24V DC is available.


Quantity of one (1) Boss Model 80100-UHBI hydraulic drive underdeck air compressor(s) to include the
following as standard equipment:

  • Boss oil flooded, rotary screw air-end designed to produce up to 100 CFM @ 110 PSIG continuously.

    Delivery @ 110 psig 35 cfm 45 cfm 55 cfm 65 cfm 75 cfm 85 cfm 95 cfm 100 cfm
    Standard Motor "A" @ 2400 psi 8.1 gpm 10.1 gpm 12.2 gpm 14.1 gpm 16.3 gpm 18.2 gpm xxx gpm xxx gpm
    Optional Motor "B" @ 1900 psi 10.6 gpm 13.3 gpm 16.0 gpm 18.5 gpm 21.4 gpm 23.8 gpm 26.2 gpm 27.6 gpm

    * Calculations performed @ 85% efficiency mechanical and 96% efficiency volumetric.

  • Side-by-side gear set incorporated into air-end to achieve conservative engine speeds and greatest ground clearance.
  • Two-year, unlimited hour, warranty on the air-end.
  • Remote mount horizontal oil receiver tank with filler port and lubricant level sightglass. Exterior shell of vessel to be welded so as to be one piece. Bolt-on lids or end plates not acceptable. Tank must be ASME approved.
  • Self-contained remote mount separator element with easy access spin-on housing. No exceptions.
  • Constant speed load controller for automatic modulation of inlet valve to match air demand.
  • Remote mount, self-contained, aerodynamically designed cooling package with automatic thermal sensing control to ensure proper operating temperatures.
  • Replaceable spin-on compressor lubricant filter with safety bypass and 25-micron rating.
  • Remote mount two-stage, dry-type air intake filter with replaceable filter and gravity evacuator.
  • Instrumentation to include: hour meter, compressor lubricant temperature gauge, and air pressure gauge.
  • Hoses, fittings, electrical wire, and hardware necessary for standard installation and operation.
  • Safety devices to include: minimum pressure device, compressor lube hi-temp and hi-pressure safety system, automatic blowdown device, high-pressure relief valve, and necessary warning and information decals.
  • Operation, parts and maintenance manual.
  • Installation by factory authorized and trained distributor.

Installation of Air Storage Tanks

This rotary screw air compressor system is designed to provide continuous volume and constant pressure without the use of an air storage tank. Within a few seconds of engagement, the compressor will produce full volume and pressure needed to run corresponding air operated equipment without waiting for air tanks to fill.

Air storage tanks are not utilized as standard equipment on vehicle mounted rotary screw compressors. The installation of air storage tanks, if not done properly, will hinder the performance of the rotary screw compressor. Boss Industries Inc. strongly discourages the use of an air storage tank as standard equipment for vehicle mounted rotary screw air compressors.

In the rare event air usage is required without operating the vehicle, an air storage tank can be added to your system. When adding an air storage tank, be sure to follow all state and federal DOT regulations regarding air storage tank usage.

* Standards & specifications subject to change without notice.