Ingersoll Rand 7543-B Reversible Air Power Motor provides pneumatic rotary output for machinery requiring low-speed operation with the ability to run in either rotational direction. Rated at 0.25 HP and 550 RPM, this model uses double gear reduction to deliver its specified output characteristics. Its reversible configuration supports equipment where forward and reverse rotation are required as part of the machine or process cycle.
The 7543-B develops 7.80 lb-ft stall torque, representing the torque produced when an applied load prevents the motor output from rotating. Combined with the 550 RPM output and double gear reduction, this torque rating gives OEM designers, machine builders, and maintenance professionals useful selection data for evaluating the motor against compatible driven equipment. The reversible design also makes direction capability an important specification to verify when replacing an existing pneumatic motor.
Type: Air Power Motor | Model: 7543-B | Rotation: Reversible | Power: 0.25 HP | Speed: 550 RPM | Stall Torque: 7.80 lb-ft | Gear Reduction: Double
Features:
- Pneumatic motor configuration provides rotary output from a compatible compressed-air supply.
- Reversible operation supports machinery requiring forward and reverse rotational motion.
- 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, gear-reduced pneumatic rotation.
- 7.80 lb-ft stall torque provides a load reference when evaluating the motor against application requirements.
Made in USA: 
Applications:
- OEM machinery requiring low-speed reversible pneumatic rotary power.
- Automated mechanisms that incorporate forward and reverse rotation into their operating sequence.
- Production equipment compatible with a 550 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 7543-B performance ratings and mechanical interfaces match the existing motor.
FAQs:
- Q: Is the Ingersoll Rand 7543-B reversible?
A: Yes. The 7543-B is specified as a reversible air power motor for compatible equipment requiring rotation in either direction. - Q: What is the output speed of the 7543-B?
A: The specified output speed is 550 RPM. - Q: What does double gear reduction mean on the 7543-B?
A: Double gear reduction means two stages of gearing are used in the motor's reduction system. The 7543-B is specified with a 550 RPM output. - Q: What is the stall torque rating of this air power motor?
A: The 7543-B is rated at 7.80 lb-ft stall torque. Stall torque represents torque developed when the applied load prevents the motor output from rotating. - Q: What should be verified before selecting the 7543-B as a replacement motor?
A: Confirm that the application requires 0.25 HP, 550 RPM output, 7.80 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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