Designed for equipment and machinery requiring compact, higher-speed pneumatic rotary power, the Ingersoll Rand 8611-A Non-Reversible Multi-Vane Air Motor delivers 0.10 HP with a 5,000 RPM free speed. Its 3/8" keyed spindle provides a defined connection for compatible driven components, while the single gear reduction supports the motor's higher operating-speed configuration.
Under load at maximum horsepower, the 8611-A operates at 2,500 RPM and produces 0.21 lb-ft (0.3 Nm) of torque, with stall torque rated at 0.42 lb-ft (0.6 Nm). Free-speed air consumption is 9.5 SCFM (4.5 L/s), providing an important reference when sizing the compressed-air supply for the installation.
Type: Multi-Vane Air Motor | Model: 8611-A | Configuration: Non-Reversible | Power: 0.10 HP | Spindle: 3/8" Keyed | Free Speed: 5,000 RPM | Load Speed at Max. HP: 2,500 RPM | Torque Output at Max. HP: 0.21 lb-ft (0.3 Nm) | Stall Torque: 0.42 lb-ft (0.6 Nm) | Air Consumption at Free Speed: 9.5 SCFM (4.5 L/s) | Sound Level at Free Speed: 80 dB(A) | Weight: 0.80 lb (0.36 kg) | Gear Reduction: Single
Features:
- Multi-vane pneumatic design provides rotary power for compatible machinery, fixtures, and equipment.
- 5,000 RPM free speed supports applications requiring faster rotary output from a compact air motor.
- 2,500 RPM load speed at maximum horsepower provides a useful reference for matching the motor to operating requirements under load.
- 3/8" keyed spindle provides a defined mechanical interface for compatible driven components.
- Single gear reduction supports the higher-speed output characteristics of this model.
- Non-reversible configuration provides single-direction motor operation.
- 0.80 lb (0.36 kg) weight supports integration where equipment weight is an important design consideration.
- 9.5 SCFM (4.5 L/s) free-speed air consumption helps with compressed-air system planning.
Made in USA: ![]()
Applications:
- Machinery requiring compact, higher-speed pneumatic rotary power.
- Production equipment and fixtures designed for single-direction motor operation.
- Automation systems requiring a 3/8" keyed spindle connection.
- Mechanical equipment where the specified speed and torque characteristics match the driven load.
- Compressed-air-powered systems where a lightweight pneumatic motor is appropriate for the equipment design.
FAQs:
- Q: What is the operating speed of the Ingersoll Rand 8611-A?
A: The 8611-A has a free speed of 5,000 RPM. At maximum horsepower, the manufacturer specifies a load speed of 2,500 RPM. - Q: How much torque does the 8611-A produce?
A: Torque output at maximum horsepower is 0.21 lb-ft (0.3 Nm), while stall torque is rated at 0.42 lb-ft (0.6 Nm). - Q: What type of spindle does the 8611-A use?
A: The motor uses a 3/8" keyed spindle. The driven component and connection arrangement should be compatible with this spindle configuration. - Q: How much compressed air does the 8611-A consume?
A: Air consumption at free speed is specified at 9.5 SCFM (4.5 L/s). This value should be considered when sizing the air supply for the motor. - Q: How does the 8611-A differ from the 8610-A?
A: Both are non-reversible 0.10 HP models with 3/8" keyed spindles, but their speed, torque, and gearing differ. The 8611-A uses single gear reduction and operates at 5,000 RPM free speed, while the 8610-A uses double gear reduction and operates at 1,000 RPM, providing different speed and torque characteristics for matching the motor to the driven load.

| SKU | SPINDLE | R.P.M. | STALL | TORQUE OUTPUT @MAX. H.P. |
AIR CONSUMPTION @FREE SPEED |
SOUND LEVEL @FREE SPEED |
WEIGHT | GEAR REDUCTION |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FREE SPEED |
LOAD SPEED @MAX. H.P. |
LB FT | NM | LB FT | NM | SCFM | L/S | LBS. | KG. | ||||
| NON-REVERSIBLE - .10 H.P. | |||||||||||||
| 8610-A | 3/8" Keyed | 1,000 | 500 | 1.8 | 2.4 | 1.05 | 1.4 | 9.5 | 4.5 | 80 | .90 | .40 | Double |
| 8611-A | 3/8" Keyed | 5,000 | 2,500 | .42 | .6 | .21 | .3 | 9.5 | 4.5 | 80 | .80 | .36 | Single |
| 8616-A | 3/8"-24 Th'd. | 1,000 | 500 | 1.8 | 2.4 | 1.05 | 1.4 | 9.5 | 4.5 | 80 | .90 | .40 | Double |
| 8617-A | 3/8"-24 Th'd. | 5,000 | 2,500 | .42 | .6 | .21 | .3 | 9.5 | 4.5 | 80 | .80 | .36 | Single |
| 8618-A | 3/8"-24 Th'd. | 25,000 | 13,000 | .10 | .1 | .04 | .05 | 9.5 | 4.5 | 80 | .80 | .36 | Single |
| REVERSIBLE - .10 H.P. | |||||||||||||
| 8613-A | 3/8" Keyed | 1,000 | 500 | 1.8 | 2.6 | 1.05 | 1.4 | 11.5 | 5.4 | 80* | .90 | .40 | Double |
| 8614-A | 3/8" Keyed | 5,000 | 2,500 | .42 | .6 | .21 | .3 | 11.5 | 5.4 | 80* | .80 | .36 | Single |
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
- 5000
- Load Speed @ Max HP (RPM)
- 2500
- Stall Torque (ft-lbs)
- 0.42
- Stall Torque (Nm)
- 0.6
- Torque Output @ Max HP (ft-lbs)
- 0.21
- Torque Output @ Max HP (Nm)
- 0.3
- Air Consumption (SCFM)
- 9.5
