Ingersoll Rand 8231-7B Reversible Air Power Motor is engineered to provide dependable low-speed pneumatic rotary power for industrial equipment requiring high torque and bidirectional operation. Built with a planetary gear system and double gear reduction, this air power motor delivers 0.50 HP and operates at a free speed of 750 RPM. Its reversible configuration allows both clockwise and counterclockwise rotation, making it an excellent choice for OEM machinery, material handling equipment, automated production systems, indexing mechanisms, and industrial processing applications where controlled speed and increased torque are essential.
The 8231-7B develops 11.80 lb-ft of stall torque, representing the maximum torque generated when the output shaft is prevented from rotating. The combination of planetary gearing and double gear reduction provides significant torque multiplication while maintaining reliable pneumatic performance, making this model ideal for applications that require greater rotational force at reduced operating speeds.
Type: Air Power Motor | Model: 8231-7B | Rotation: Reversible | Gear Type: Planetary Gear | Gear Reduction: Double | Power: 0.50 HP | Speed: 750 RPM | Stall Torque: 11.80 lb-ft
Features:
- Air-powered motor converts compressed air into dependable rotary power for industrial machinery.
- Reversible operation allows the motor to rotate in both clockwise and counterclockwise directions.
- Planetary gear assembly provides efficient power transmission while maintaining a compact design.
- Double gear reduction increases output torque for demanding low-speed industrial applications.
- 0.50 HP output delivers reliable pneumatic performance for compatible equipment.
- 750 RPM free speed is suitable for applications requiring controlled rotational speed with enhanced torque output.
- 11.80 lb-ft stall torque provides a manufacturer-published reference for evaluating maximum loading conditions.
Made in USA: 
Applications:
- OEM machinery requiring reversible pneumatic rotary power.
- Industrial automation and assembly systems with bidirectional drive requirements.
- Material handling, conveyor, and transfer equipment.
- Processing and packaging machinery utilizing planetary geared air motors.
- Replacement installations where the published motor specifications match the original equipment.
FAQs:
- Q: Is the Ingersoll Rand 8231-7B reversible?
A: Yes. This model is designed to operate in both clockwise and counterclockwise directions. - Q: What type of gearing does this motor use?
A: The 8231-7B features a planetary gear system with double gear reduction. - Q: Why is double gear reduction beneficial?
A: Double gear reduction provides greater torque multiplication than a single-stage reduction, making it ideal for applications requiring increased output torque at lower operating speeds. - Q: What does the 11.80 lb-ft stall torque specification indicate?
A: Stall torque is the maximum torque produced when the output shaft is prevented from rotating. It serves as a performance reference and should not be interpreted as continuous operating torque. - Q: What should be confirmed before installing this motor?
A: Verify horsepower, operating speed, rotation direction, gear configuration, shaft dimensions, mounting arrangement, and compressed-air requirements using the Ingersoll Rand Air Motor Catalog before installation.
| SKU | Spindle | R.P.M. | Torque | Air Consumption at Free Speed | Sound Level at Free Speed | Weight | Gear Reduction | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Free Speed | Load Speed at Max. Hp | Stall | Output at Max. Hp | ||||||||||
| lb-ft | Nm | lb-ft | Nm | SCFM | L/s | dB(A) | lbs | kg | |||||
| NON-REVERSIBLE - 0.60 HP | |||||||||||||
| 8230-1A | 3/8" Keyed | 19,000 | 9,800 | 0.70 | 0.9 | 0.32 | 0.4 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8230-2A | 3/8" Keyed | 5,700 | 2,900 | 2.5 | 2.9 | 1.10 | 1.5 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8230-3A | 3/8" Keyed | 3,500 | 1,750 | 3.50 | 4.7 | 1.80 | 2.4 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8230-4A | 3/8" Keyed | 2,800 | 1,400 | 4.50 | 6.1 | 2.20 | 3.0 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8230-5A | 3/8" Keyed | 1,650 | 840 | 7.50 | 10.2 | 3.80 | 5.1 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8230-6A | 3/8" Keyed | 1,000 | 500 | 12.00 | 16.3 | 6.20 | 8.4 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8230-7A | 3/8" Keyed | 800 | 390 | 14.80 | 20.0 | 8.00 | 10.8 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8230-8A | 3/8" Keyed | 600 | 315 | 19.60 | 26.5 | 10.00 | 13.5 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8230-9A | 3/8" Keyed | 500 | 250 | 24.00 | 32.5 | 12.50 | 16.9 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8229-1A | 3/8"-24 Th’d. | 19,000 | 9,800 | .70 | 0.9 | 0.32 | 0.4 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8229-2A | 3/8"-24 Th’d. | 5,700 | 2,900 | 2.15 | 2.9 | 1.10 | 1.5 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8229-3A | 3/8"-24 Th’d. | 3,500 | 1,750 | 3.50 | 4.7 | 1.80 | 2.4 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8229-4A | 3/8"-24 Th’d. | 2,800 | 1,400 | 4.50 | 6.1 | 2.20 | 3.0 | 41 | 19.3 | 80 | 2.45 | 1.10 | Single |
| 8229-5A | 3/8"-24 Th’d. | 1,650 | 840 | 7.50 | 10.2 | 3.80 | 5.1 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8229-6A | 3/8"-24 Th’d. | 1,000 | 500 | 12.00 | 16.3 | 6.20 | 8.4 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8229-7A | 3/8"-24 Th’d. | 800 | 390 | 14.80 | 20.0 | 8.00 | 10.8 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8229-8A | 3/8"-24 Th’d. | 600 | 315 | 19.60 | 26.5 | 10.00 | 13.5 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| 8229-9A | 3/8"-24 Th’d. | 500 | 250 | 24.00 | 32.5 | 12.50 | 16.9 | 41 | 19.3 | 80 | 2.98 | 1.34 | Double |
| REVERSIBLE - 0.50 HP | |||||||||||||
| 8231-1B | 3/8" Keyed | 18,000 | 9,200 | 0.52 | 0.7 | 0.28 | 0.4 | 32 | 15.1 | 80* | 2.45 | 1.10 | Single |
| 8231-2B | 3/8" Keyed | 5,300 | 2,600 | 1.70 | 2.3 | 1.00 | 1.3 | 32 | 15.1 | 80* | 2.45 | 1.10 | Single |
| 8231-3B | 3/8" Keyed | 3,200 | 1,550 | 2.90 | 3.9 | 1.70 | 2.3 | 32 | 15.1 | 80* | 2.45 | 1.10 | Single |
| 8231-4B | 3/8" Keyed | 2,600 | 1,300 | 3.50 | 4.7 | 2.00 | 2.7 | 32 | 15.1 | 80* | 2.45 | 1.10 | Single |
| 8231-5B | 3/8" Keyed | 1,500 | 780 | 5.90 | 8.0 | 3.50 | 4.7 | 32 | 15.1 | 80* | 2.98 | 1.34 | Double |
| 8231-6B | 3/8" Keyed | 950 | 480 | 9.50 | 12.9 | 5.50 | 7.4 | 32 | 15.1 | 80* | 2.98 | 1.34 | Double |
| 8231-7B | 3/8" Keyed | 750 | 380 | 11.80 | 16.0 | 7.00 | 9.5 | 32 | 15.1 | 80* | 2.98 | 1.34 | Double |
| 8231-8B | 3/8" Keyed | 575 | 290 | 15.50 | 21.0 | 9.00 | 12.2 | 32 | 15.1 | 80* | 2.98 | 1.34 | Double |
| 8231-9B | 3/8" Keyed | 475 | 240 | 19.40 | 26.2 | 11.00 | 14.9 | 32 | 15.1 | 80* | 2.98 | 1.34 | Double |
Looking for more information about Ingersoll Rand Air Motor? Click here to view the Catalog
For help selecting the correct Ingersoll Rand Air Motors for your assembly application, call (800) 608-5210 or email info@intlairtool.com
- Type
- Air Motor
- Spindle Keyed (in.)
- 3/8
- RPM
- 750
- Load Speed @ Max HP (RPM)
- 380
- Stall Torque (ft-lbs)
- 11.80
- Stall Torque (Nm)
- 16.0
- Torque Output @ Max HP (ft-lbs)
- 7.00
- Torque Output @ Max HP (Nm)
- 9.5
- Air Consumption (SCFM)
- 32
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