Built for low-speed, high-torque milling, routing, and demanding material removal applications, the Ingersoll Rand 7803-4B Non-Reversible Milling Motor delivers 0.85 HP with a free speed of 1,200 RPM for applications requiring exceptional torque and precise spindle control. Featuring forward rotation and a double gear reduction, this pneumatic milling motor produces 16.00 ft-lbs of stall torque, making it well suited for heavy milling, machining, and production processes where maximum cutting force is essential. Its pneumatic design provides dependable continuous-duty performance while allowing smooth speed adjustment through regulated compressed air.
As part of Ingersoll Rand's industrial milling motor lineup, the 7803-4B is intended for fixture-mounted machinery, automated manufacturing systems, and dedicated machining equipment. The double gear reduction significantly increases torque output while maintaining controlled operating speed, making this motor an excellent choice for demanding industrial operations that require consistent power delivery and reliable pneumatic performance.
Type: Non-Reversible Milling Motor | Rotation: Forward | Power: 0.85 HP | Free Speed: 1,200 RPM | Stall Torque: 16.00 ft-lbs | Gear Reduction: Double | Application: Milling & Material Removal
Features:
- Forward-rotation pneumatic milling motor for dedicated industrial machining applications.
- 0.85 HP air motor delivers reliable power for continuous-duty manufacturing operations.
- 1,200 RPM free speed provides controlled spindle speed for precision milling and heavy material removal.
- Double gear reduction substantially increases output torque for demanding cutting applications.
- 16.00 ft-lbs stall torque supports heavy cutting loads and high-resistance machining operations.
- Pneumatic motor design provides variable speed control through compressed air regulation and can safely stall without motor damage when operated within manufacturer recommendations.
45058 - Foot Bracket
41559 - Flange Bracket

Made in USA: 
Applications:
- Heavy-duty milling and machining operations requiring maximum torque.
- Fixture-mounted production equipment used in manufacturing facilities.
- Metal fabrication, contour milling, and aggressive material removal.
- Automated machinery powered by compressed air for continuous production.
- Industrial applications where low-speed, high-torque pneumatic performance is required.
FAQs:
- Q: What does non-reversible mean?
A: The 7803-4B is designed for forward rotation only and is not intended to operate in reverse. - Q: Why does this model use double gear reduction?
A: Double gear reduction significantly increases output torque while lowering operating speed, making the motor suitable for demanding milling and machining applications that require greater cutting force. - Q: What advantage does 16.00 ft-lbs of stall torque provide?
A: The higher stall torque allows the motor to handle heavier cutting loads, improving performance during aggressive material removal and precision machining operations. - Q: Why choose a pneumatic milling motor over an electric motor?
A: Pneumatic motors provide variable speed control through regulated air supply, tolerate continuous-duty operation, and can safely stall without motor damage when operated according to manufacturer recommendations.

| SKU | Spindle | R.P.M. | Torque | Air Consumption at Free Speed |
Sound Level at Free Speed dB(A) |
Weight | Gear Reduction |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Free Speed | Load Speed at Max. Hp |
Stall | Output at Max. Hp | ||||||||||
| lb-ft | Nm | lb-ft | Nm | SCFM | L/s | lbs | kg | ||||||
| Non-Reversible - 0.85 HP | |||||||||||||
| 7800-4B | 3/8" Maximum Collet Capacity |
18,000 | 9,000 | 1.00 | 1.4 | 0.50 | 0.68 | 41.7 | 19.7 | 78 | 4.89 | 2.20 | Single |
| 7801-4B | 4,600 | 2,400 | 4.00 | 5.5 | 1.86 | 2.5 | 41.7 | 19.7 | 78 | 4.89 | 2.20 | Single | |
| 7802-4B | 2,500 | 1,300 | 7.50 | 10.3 | 3.43 | 4.7 | 41.7 | 19.7 | 78 | 4.89 | 2.20 | Single | |
| 7803-4B | 1,200 | 600 | 16.00 | 21.9 | 7.44 | 10.2 | 41.7 | 19.7 | 78 | 6.39 | 2.86 | Double | |
| 7805-4B | 350 | 170 | 55.00 | 75.5 | 26.25 | 36.0 | 41.7 | 19.7 | 78 | 6.39 | 2.86 | Double | |
Looking for more information about Ingersoll Rand Milling Motor? Click here to view the Catalog
For help selecting the correct Ingersoll Rand Milling Motors for your assembly application, call (800) 608-5210 or email info@intlairtool.com
- Type
- Milling Motor
- Power (hp)
- 0.85
- Spindle Max Collet Capacity (in.)
- 3/8
- RPM
- 1200
- Load Speed @ Max HP (RPM)
- 600
- Stall Torque (ft-lbs)
- 16.00
- Stall Torque (Nm)
- 21.9
- Torque Output @ Max HP (ft-lbs)
- 7.44
- Torque Output @ Max HP (Nm)
- 10.2
