Built for high-speed milling, routing, deburring, and precision material removal, the Ingersoll Rand 7800-4B Non-Reversible Milling Motor delivers 0.85 HP of pneumatic power with a free speed of 18,000 RPM. Its forward-rotation configuration and single gear reduction provide controlled power transmission for machining and finishing operations that demand both speed and torque. With a 1.00 ft-lb stall torque, the motor supplies dependable cutting force while maintaining the high rotational speed needed for milling, trimming, and contouring applications.
Part of Ingersoll Rand's 2200-Series forward-rotation side-mount milling motors, the 7800-4B features a 3/8" maximum collet capacity for compatibility with a variety of rotary cutting tools. Pneumatic air motors (which convert compressed air into rotary power) are well suited for continuous-duty applications because they can be stalled without motor damage and offer variable speed through air supply control. This makes the 7800-4B a practical solution for industrial machinery, fixture-mounted milling systems, and production equipment operating in manufacturing and metalworking environments.
Type: Non-Reversible Milling Motor | Rotation: Forward | Power: 0.85 HP | Free Speed: 18,000 RPM | Stall Torque: 1.00 ft-lb | Output Torque @ Max HP: 0.50 ft-lb | Speed @ Max HP: 9,000 RPM | Collet Capacity: 3/8" Maximum | Gear Reduction: Single | Air Consumption @ Free Speed: 41.7 SCFM | Sound Level: 78 dB(A) | Weight: 4.89 lb (2.20 kg)
Features:
- Forward-rotation air motor optimized for milling and material removal applications.
- 0.85 HP output provides pneumatic power for continuous machining operations.
- 18,000 RPM free speed supports high-speed cutting, routing, and deburring tasks.
- Single gear reduction balances speed and torque for controlled cutting performance.
- 3/8" maximum collet capacity accommodates a variety of compatible rotary cutting tools.
- Pneumatic motor design can be stalled without damage when operated within manufacturer recommendations.
45058 - Foot Bracket
41559 - Flange Bracket

Made in USA: 
Applications:
- Production milling and trimming operations in manufacturing facilities.
- Fixture-mounted machining equipment for metalworking and fabrication.
- Deburring, edge finishing, and contouring of machined components.
- Routing and material removal in automated or semi-automated production systems.
- Industrial machinery where compressed-air power is preferred over electric motors.
FAQs:
- Q: What does non-reversible mean?
A: The 7800-4B is designed for forward rotation only and is not intended to operate in reverse. - Q: What size tooling can this milling motor accept?
A: The motor features a maximum collet capacity of 3/8", allowing it to accept compatible rotary cutting tools with matching shanks. - Q: Can this air motor operate continuously?
A: Pneumatic air motors are commonly used for continuous-duty industrial applications and can safely stall without motor damage when operated according to manufacturer recommendations. - Q: What is the advantage of single gear reduction?
A: A single gear reduction provides a balance between output speed and torque, making the motor suitable for precision milling and material removal applications requiring controlled power delivery.

| 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
- 18000
- Load Speed @ Max HP (RPM)
- 9000
- Stall Torque (ft-lbs)
- 1.00
- Stall Torque (Nm)
- 1.4
- Torque Output @ Max HP (ft-lbs)
- 0.50
- Torque Output @ Max HP (Nm)
- 0.68
