Ingersoll Rand 7533-B Non-Reversible Air Power Motor provides pneumatic rotary output for machinery requiring lower-speed, single-direction operation. Rated at 0.25 HP and 550 RPM, this model uses double gear reduction to deliver its specified output characteristics. The non-reversible configuration is intended for equipment where the driven mechanism operates in one rotational direction without the need for forward-and-reverse control.
The 7533-B develops 8.2 lb-ft stall torque, which represents the torque produced when an applied load prevents the motor output from rotating. Its combination of 550 RPM output, 0.25 HP power, and double gear reduction provides important selection criteria for OEM designers, machine builders, and maintenance professionals matching a pneumatic motor to compatible machinery or an existing installation.
Type: Air Power Motor | Model: 7533-B | Rotation: Non-Reversible | Power: 0.25 HP | Speed: 550 RPM | Stall Torque: 8.2 lb-ft | Gear Reduction: Double
Features:
- Pneumatic motor configuration supplies rotary output from a compatible compressed-air source.
- Double gear reduction uses two stages of gearing to provide the specified reduced-speed output.
- 0.25 HP power rating provides a defined specification for matching the motor to compatible driven equipment.
- 550 RPM output supports machinery requiring lower-speed pneumatic rotary motion.
- 8.2 lb-ft stall torque provides a load reference when evaluating the motor against application requirements.
- Non-reversible configuration is suited to mechanisms designed for consistent single-direction rotation.
Made in USA: 
Applications:
- OEM equipment requiring lower-speed pneumatic rotary power in one direction.
- Production machinery compatible with a 550 RPM gear-reduced motor output.
- Machine-building projects designed around the motor's specified horsepower and stall torque.
- Compressed-air-powered mechanisms where double gear reduction matches the required drive configuration.
- MRO replacement installations where the 7533-B performance ratings and mechanical interfaces match the existing motor.
FAQs:
- Q: Does the Ingersoll Rand 7533-B provide reversible operation?
A: No. The 7533-B is specified as a non-reversible air power motor for equipment requiring rotation in a single direction. - Q: What is the output speed of the 7533-B?
A: The specified output speed is 550 RPM. - Q: What does double gear reduction mean on the 7533-B?
A: Double gear reduction means the motor uses two stages of gearing to reduce rotational speed between the motor and its output. The 7533-B has a specified output speed of 550 RPM. - Q: How much stall torque does this model provide?
A: The 7533-B is rated at 8.2 lb-ft stall torque. Stall torque represents torque developed when the applied load prevents the motor output from rotating. - Q: What specifications should be checked when replacing an existing motor with the 7533-B?
A: Verify that the application requires 0.25 HP, 550 RPM output, 8.2 lb-ft stall torque, non-reversible operation, and double gear reduction. Shaft, mounting, dimensional, and compressed-air requirements should also be confirmed against the manufacturer 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 - 0.25 HP | |||||||||||||
| 7538-B | 3/8" Keyed | 550 | 325 | 8.2 | 11.1 | 4.0 | 5.4 | 18.1 | 8.5 | 75 | 1.82 | 0.82 | Double |
| 7539-B | 3/8" Keyed | 900 | 550 | 5.0 | 6.7 | 2.4 | 3.2 | 18.1 | 8.5 | 75 | 1.82 | 0.82 | Double |
| 7540-B | 3/8" Keyed | 2,700 | 1,600 | 1.75 | 2.3 | 0.82 | 1.1 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| 7541-B | 3/8" Keyed | 4,500 | 2,700 | 1.05 | 1.4 | 0.49 | 0.66 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| 7542-C | 3/8" Keyed | 20,000 | 12,000 | 0.22 | 0.3 | 0.11 | 0.14 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| 7533-B | 3/8"-24 Th’d. | 550 | 325 | 8.2 | 11.1 | 4.0 | 5.4 | 18.1 | 8.5 | 75 | 1.82 | 0.82 | Double |
| 7534-B | 3/8"-24 Th’d. | 900 | 550 | 5.0 | 6.7 | 2.4 | 3.2 | 18.1 | 8.5 | 75 | 1.82 | 0.82 | Double |
| 7535-C | 3/8"-24 Th’d. | 2,700 | 1,600 | 1.75 | 2.3 | 0.82 | 1.1 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| 7536-B | 3/8"-24 Th’d. | 4,500 | 2,700 | 1.05 | 1.4 | 0.49 | 0.66 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| 7537-C | 3/8"-24 Th’d. | 20,000 | 12,000 | 0.22 | 0.3 | 0.11 | 0.14 | 18.1 | 8.5 | 75 | 1.52 | 0.68 | Single |
| Reversible - 0.25 HP | |||||||||||||
| 7543-B | 3/8" Keyed | 550 | 300 | 7.80 | 10.6 | 4.37 | 5.9 | 20.0 | 9.4 | 75* | 1.82 | 0.82 | Double |
| 7544-B | 3/8" Keyed | 900 | 550 | 4.75 | 6.4 | 2.62 | 3.5 | 20.0 | 9.4 | 75* | 1.82 | 0.82 | Double |
| 7545-B | 3/8" Keyed | 2,700 | 1,500 | 1.60 | 2.2 | 0.87 | 1.1 | 20.0 | 9.4 | 75* | 1.52 | 0.68 | Single |
| 7546-B | 3/8" Keyed | 4,500 | 2,400 | 0.98 | 1.3 | 0.55 | 0.7 | 20.0 | 9.4 | 75* | 1.52 | 0.68 | Single |
| 7547-C | 3/8" Keyed | 20,000 | 11,000 | 0.22 | 0.3 | 0.12 | 0.16 | 20.0 | 9.4 | 75* | 1.52 | 0.68 | Single |
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For help selecting the correct Ingersoll Rand Air Power Motors for your assembly application, call (800) 608-5210 or email info@intlairtool.com
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