Ingersoll Rand G1A120PS4 Angle Air Die Grinder | 0.4 HP | 12,000 RPM | 1/4" - 20 Spindle | Piped Away Exhaust

For grinding and surface finishing in confined metal assemblies, the Ingersoll Rand G1A120PS4 Angle Air Die Grinder combines compact construction with a threaded spindle configuration for compatible grinding accessories. Part of the G1 Series, this pneumatic grinder delivers 0.4 HP (0.30 kW) rated power and a 12,000 RPM maximum free speed for light material removal, deburring, rough casting cleanup, and weld finishing. Unlike collet-equipped die grinders, the G1A120PS4 features a 1/4"-20 threaded spindle, which provides a threaded mounting connection for accessories specifically designed for that spindle size. Its piped-away exhaust allows discharged compressed air to be routed away from the immediate work area, while the angle-head configuration helps operators reach surfaces obstructed by surrounding machinery or structural components.

The G1A120PS4 weighs 1.10 lbs (0.50 kg) and measures 5.98 inches (152 mm) in overall length, making it suitable for controlled grinding around compact mechanical assemblies and closely spaced metal features. Its comfortable D-shaped grip provides a practical handling surface during repeated finishing operations. G1 Series construction is made to withstand repeated drops, harsh chemicals, and challenging work environments, while one-nut access for motor servicing simplifies maintenance access. With 18.96 CFM (537 L/min) air consumption at load, a 1/4-inch air inlet, and a 0.31-inch (8 mm) minimum hose size, this angle die grinder can be matched to an appropriately sized compressed air system for industrial fabrication and maintenance work.

Type: Angle Pneumatic Die Grinder | Model: G1A120PS4 | Series: G1 Series | Rated Power: 0.4 HP (0.30 kW) | Maximum Free Speed: 12,000 RPM | Output: 1/4"-20 Threaded Spindle | Configuration: Angle | Exhaust: Piped Away | Weight: 1.10 lbs (0.50 kg) | Overall Length: 5.98" (152 mm) | Air Consumption at Load: 18.96 CFM (537 L/min) | Air Inlet Size: 1/4" | Minimum Hose Size: 0.31" (8 mm) | Vibration Level: 3.0 m/s² | Vibration Uncertainty: 1.0 m/s²

Features:

• Angle-head configuration provides access to recessed metal surfaces and grinding locations where a straight-body tool may be difficult to position.
• 0.4 HP (0.30 kW) rated power supports deburring, light material removal, casting cleanup, and localized metal finishing.
• 12,000 RPM maximum free speed allows operation with compatible grinding accessories rated for the tool's operating speed.
• 1/4"-20 threaded spindle provides a mounting connection for appropriately sized and approved threaded grinding accessories.
• Piped-away exhaust configuration allows discharged compressed air to be routed away from the immediate grinding area through a suitable exhaust arrangement.
• Compact, lightweight construction supports maneuverability when finishing closely spaced mechanical components and metal assemblies.
• Ergonomically shaped D-style grip provides a comfortable holding surface during repeated grinding and finishing operations.
• G1 Series construction withstands repeated drops, chemical exposure, and challenging working conditions, while one-nut access simplifies motor servicing.

Applications:

• Metal fabrication and welding: Cleaning minor weld irregularities, smoothing fabricated edges, and preparing accessible metal surfaces for finishing.
• Tool and die maintenance: Removing burrs from machined features and performing localized grinding with compatible spindle-mounted accessories.
• Foundry and casting operations: Cleaning rough castings, removing accessible casting flash, and finishing small surface imperfections.
• Automotive and transportation workshops: Preparing metal components, removing sharp edges, and performing localized surface cleanup during repairs.
• Industrial machinery manufacturing: Finishing mechanical parts, cleaning component edges, and working around surrounding structures in compact assemblies.
• General industrial maintenance and MRO: Performing small-area grinding, surface preparation, and component refurbishment with suitable threaded accessories.

FAQs:

• Q: What type of grinding accessories fit the Ingersoll Rand G1A120PS4?

  A: The G1A120PS4 uses a 1/4"-20 threaded spindle rather than a conventional collet. Accessories must have a compatible threaded mounting arrangement, be approved for the grinder's intended application, and carry a maximum operating speed rating of at least 12,000 RPM. Matching the spindle thread alone does not establish accessory compatibility.

• Q: Is a 1/4"-20 spindle the same as a 1/4-inch collet?

  A: No. A 1/4"-20 spindle has a threaded connection with 20 threads per inch for mounting compatible accessories. A 1/4-inch collet grips the smooth shank of a grinding accessory. These attachment systems require different accessory configurations and should not be treated as interchangeable.

• Q: How does the G1A120PS4 compare with the G1A200PS4?

  A: Both models feature 0.4 HP rated power, a 1/4"-20 threaded spindle, and piped-away exhaust. The G1A120PS4 operates at 12,000 RPM with 18.96 CFM air consumption at load, while the G1A200PS4 operates at 20,000 RPM with 25 CFM at load. Choose according to the accessory's permitted operating speed, grinding requirements, and available compressed air capacity.

• Q: What compressed air supply does the G1A120PS4 require?

  A: Ingersoll Rand specifies 18.96 CFM (537 L/min) air consumption at load, a 1/4-inch air inlet, and an 8 mm minimum hose size. The compressor and air distribution system should deliver sufficient airflow at the manufacturer's recommended operating pressure, particularly during repeated grinding operations.

• Q: What is the purpose of piped-away exhaust on this angle grinder?

  A: Piped-away exhaust allows compressed air discharged from the grinder to be directed away from the immediate working position through suitable exhaust routing. This helps manage tool exhaust around the operator and workpiece. It does not capture airborne grinding dust or replace appropriate ventilation and protective equipment.

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For help choosing the correct Ingersoll Rand Straight Die Grinders for your application, please call (800) 608-5210 or email info@intlairtool.com