Ingersoll Rand 7544-B Reversible Air Power Motor provides pneumatic rotary output for machinery requiring lower-speed operation with the ability to run in either rotational direction. Rated at 0.25 HP and 900 RPM, this model uses double gear reduction to deliver its specified output characteristics. Its reversible configuration makes direction of rotation an available operating function for compatible equipment and machine designs.
The 7544-B develops 4.75 lb-ft stall torque, representing the torque produced when the applied load prevents the motor output from rotating. Combined with the 900 RPM output and double gear reduction, this rating gives OEM designers, machine builders, and maintenance teams important selection data when matching the motor to a driven mechanism. The reversible design is particularly relevant when the machine cycle requires both forward and reverse rotary motion.
Type: Air Power Motor | Model: 7544-B | Rotation: Reversible | Power: 0.25 HP | Speed: 900 RPM | Stall Torque: 4.75 lb-ft | Gear Reduction: Double
Features:
- Pneumatic motor configuration provides rotary output from a compatible compressed-air supply.
- Reversible operation supports machinery that requires rotation in either direction during its operating sequence.
- Double gear reduction uses two stages of gearing to provide the specified reduced-speed output.
- 0.25 HP rating provides a defined power specification for matching the motor to compatible driven equipment.
- 900 RPM output supports applications requiring lower-speed, gear-reduced pneumatic rotary motion.
- 4.75 lb-ft stall torque provides a load reference when evaluating the motor against application requirements.
Made in USA: 
Applications:
- OEM machinery requiring reversible pneumatic rotary power.
- Automated mechanisms where forward and reverse rotation are incorporated into the operating sequence.
- Production equipment compatible with a 900 RPM gear-reduced motor output.
- Machine-building applications where double gear reduction and bidirectional operation match the required drive configuration.
- MRO replacement installations where the 7544-B performance ratings and mechanical interfaces match the existing motor.
FAQs:
- Q: Can the Ingersoll Rand 7544-B operate in both directions?
A: Yes. The 7544-B is specified as a reversible air power motor for compatible equipment requiring bidirectional rotation. - Q: What is the output speed of the 7544-B?
A: The specified output speed is 900 RPM. - Q: What type of gear reduction does the 7544-B use?
A: The 7544-B is specified with double gear reduction, meaning two stages of gearing are used to provide its reduced-speed output configuration. - Q: What is the stall torque rating of this air power motor?
A: The 7544-B is rated at 4.75 lb-ft stall torque. Stall torque represents torque developed when the applied load prevents the motor output from rotating. - Q: What should be verified when selecting the 7544-B as a replacement motor?
A: Confirm that the application requires 0.25 HP, 900 RPM output, 4.75 lb-ft stall torque, reversible operation, and double gear reduction. Shaft, mounting, dimensional, and compressed-air requirements should also be verified 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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