Built for precision drilling in manufacturing, fabrication, and industrial maintenance environments, the Ingersoll Rand 7AJST4 Pistol Grip Air Drill combines a dependable 0.75 HP pneumatic motor with 40 in-lbs maximum torque to deliver increased drilling capability for medium-duty applications. Its 4,500 RPM free speed provides the controlled drilling performance needed for larger drill bits and tougher materials, while the trigger-start pistol grip design offers excellent handling and responsive speed control for repetitive production work.
As a member of the proven Ingersoll Rand 7 Series, the 7AJST4 is built to provide reliable performance throughout demanding work shifts. The non-reversible configuration is optimized for dedicated forward drilling, while the cantilever-mounted planetary gear system efficiently transfers motor power and simplifies maintenance. Its lightweight construction and compact profile make it well suited for assembly stations, maintenance departments, and fabrication shops where accuracy and operator comfort are important.
Type: Pistol Grip Air Drill | Series: 7 Series | Model: 7AJST4 | Power: 0.75 HP | Maximum Torque: 40 in-lbs | Free Speed: 4,500 RPM | Bit Holder Capacity: 1/4 in. (6 mm) | Start Type: Trigger Start | Reverse: No | Length: 7.4 in. (189 mm) | Weight: 2.2 lb (1.0 kg) | Side-to-Center: 0.9 in. (22 mm) | Air Consumption: 25 CFM | Air Inlet: 1/4 in. NPT | Minimum Hose Size: 5/16 in. | Sound Level: 82 dBA
Features:
- 0.75 HP pneumatic motor delivers dependable power for continuous production drilling.
- 40 in-lbs maximum torque provides additional drilling capability for medium-duty industrial applications.
- 4,500 RPM free speed offers greater control when drilling larger holes or working with harder materials.
- Trigger-start throttle enables precise speed modulation for improved drilling accuracy.
- Compact pistol grip configuration promotes balanced handling and operator control.
- Cantilever-mounted planetary gears provide efficient power transmission while simplifying maintenance.
- Skinsulate™ housing enhances grip and helps improve comfort during prolonged operation.
- Lightweight design minimizes operator fatigue during repetitive production and maintenance work.

Tech Tip: To increase tool performance, extend tool life and lessen repair costs use it with a Filter-Regulator-Lubricator (FRLs)
Made in USA: ![]()
Applications:
- Manufacturing facilities performing repetitive drilling operations on production lines.
- Metal fabrication shops drilling medium-sized holes in steel, aluminum, and fabricated assemblies.
- Industrial maintenance departments servicing machinery, equipment, and production systems.
- Assembly workstations requiring accurate, controlled pneumatic drilling.
- General workshop and repair applications where lightweight handling and dependable performance are required.
FAQs:
- Q: What types of drilling jobs is the 7AJST4 intended for?
A: The 7AJST4 is intended for medium-duty drilling applications where higher torque and controlled rotational speed are needed for larger drill bits and tougher materials. - Q: Is this drill capable of reverse operation?
A: No. The 7AJST4 is a non-reversible model built specifically for forward drilling applications. - Q: What size accessories fit this drill?
A: The drill features a 1/4-inch (6 mm) bit holder for use with compatible drilling accessories. - Q: What air supply does the drill require?
A: The tool consumes approximately 25 CFM and uses a 1/4-inch NPT air inlet. A minimum 5/16-inch air hose is recommended to provide adequate airflow for consistent performance.
| SKU | MAX. TORQUE | FREE SPEED | WEIGHT | LENGTH | MAX. DRILL DIA. | SIDE TO CENTER | AIR CONSUMPTION |
|---|---|---|---|---|---|---|---|
| in-lbs (Nm) | rpm | lbs (kg) | in (mm) | in (mm) | in (mm) | cfm (L/min) | |
| TRIGGER START | |||||||
| 7ADST4 | 10 (1.1) | 20,000 | 2.2 (1.0) | 7.4" (189) | 1/4" (6) | 0.9" (22) | 25 (700) |
| 7AHST4 | 33 (3.7) | 6,000 | 2.3 (1.1) | 7.4" (189) | 1/4" (6) | 0.9" (22) | 25 (700) |
| 7AJST4 | 40 (4.5) | 4,800 | 2.3 (1.1) | 7.4" (189) | 1/4" (6) | 0.9" (22) | 25 (700) |
| 7AJJST4 | 47 (5.5) | 4,000 | 2.3 (1.1) | 7.4" (189) | 1/4" (6) | 0.9" (22) | 25 (700) |
| 7AKST6 | 58 (6.6) | 3,200 | 2.4 (1.1) | 7.6" (194) | 3/8" (10) | 0.9" (22) | 25 (700) |
| 7ALST6 | 78 (8.8) | 2,400 | 2.7 (1.2) | 7.8" (198) | 3/8" (10) | 0.9" (22) | 25 (700) |
| 7AMST6 | 130.1 (14.7) | 1,400 | 2.9 (1.3) | 8.5" (216) | 3/8" (10) | 0.9" (22) | 25 (700) |
| 7ANST8 | 185.0 (20.9) | 900 | 3.2 (1.5) | 8.7" (222) | 1/2" (13) | 0.9" (22) | 25 (700) |
| 7AQST8 | 269.9 (30.5) | 600 | 3.2 (1.5) | 8.7" (222) | 1/2" (13) | 0.9" (22) | 25 (700) |
Looking for more information about the Ingersoll Rand Drill? Click here to view the Catalog
For help choosing the proper Ingersoll Rand Drills for your assembly application, please email info@intlairtool.com or call (800) 608-5210
warning WARNING: This or other products sold on this website may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
