Ingersoll Rand 8231-3B Reversible Air Power Motor is designed to deliver dependable pneumatic rotary power for industrial equipment requiring moderate operating speeds with the flexibility of bidirectional rotation. Built with a planetary gear system and single gear reduction, this air power motor produces 0.50 HP and operates at a free speed of 3,200 RPM. Its reversible configuration enables clockwise and counterclockwise operation, making it well suited for OEM machinery, assembly equipment, indexing mechanisms, packaging systems, and automation applications where directional changes are required during operation.
The 8231-3B develops 2.90 lb-ft of stall torque, representing the maximum torque generated when the output shaft is prevented from rotating. The planetary gear arrangement provides efficient power transmission while the single gear reduction offers a balanced combination of rotational speed and torque, making this model suitable for a wide variety of industrial pneumatic drive applications.
Type: Air Power Motor | Model: 8231-3B | Rotation: Reversible | Gear Type: Planetary Gear | Gear Reduction: Single | Power: 0.50 HP | Speed: 3,200 RPM | Stall Torque: 2.90 lb-ft
Features:
- Air-powered motor converts compressed air into reliable rotary power for industrial equipment.
- Reversible operation allows the motor to rotate in either clockwise or counterclockwise directions.
- Planetary gear system provides efficient power transmission in a compact, durable design.
- Single gear reduction delivers a practical balance between operating speed and available output torque.
- 0.50 HP output provides dependable pneumatic performance for compatible machinery.
- 3,200 RPM free speed is suitable for equipment requiring moderate-speed bidirectional operation.
- 2.90 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.
- Automated assembly and indexing equipment.
- Packaging and production systems requiring directional changes.
- Industrial automation utilizing planetary geared air motors.
- Replacement installations where the published motor specifications match the original equipment.
FAQs:
- Q: Is the Ingersoll Rand 8231-3B reversible?
A: Yes. This model is designed for both clockwise and counterclockwise operation. - Q: What type of gearing does this motor use?
A: The 8231-3B features a planetary gear system with single gear reduction. - Q: What is the rated operating speed?
A: The manufacturer specifies a free speed of 3,200 RPM. - Q: What does the 2.90 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 a continuous operating value. - 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
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