Ingersoll Rand 61H120G4 Die Grinder | 61 Pro Series | 1.25 HP | 12000 RPM | 1/4" Collet Size | Side Exhaust

For metalworking operations that involve removing substantial material from welds, castings, and fabricated components, the Ingersoll Rand 61H120G4 Die Grinder delivers the power and extended reach needed for production grinding. As part of the 61 Pro Series, this straight pneumatic die grinder features a 1.25 HP (0.93 kW) vane motor and a maximum free speed of 12,000 RPM for grinding, deburring, edge finishing, and surface preparation. Its 1/4-inch collet securely holds compatible shank-mounted grinding accessories, including carbide burrs and mounted abrasives rated for the tool's speed. The side exhaust directs discharged air away from the rear of the tool, while the extended straight body design provides access to recessed areas and hard-to-reach surfaces.

The 61H120G4 incorporates a built-in mist lubricator that supplies lubricant to the air motor during operation, a motor controller that regulates operating speed, and a grit rejection system that helps protect internal components from abrasive contamination. Its metal housing provides protection in foundries, welding shops, fabrication facilities, and other environments where airborne debris and repeated tool handling are common. Measuring 15.5 inches in length and weighing 4.3 lbs, this grinder offers additional reach without requiring an angled grinding head. With 37 CFM air consumption at load, a 3/8-inch air inlet, and a 1/2-inch minimum hose size, it is intended for compressed air systems capable of supporting higher-power pneumatic grinding applications.

Type: Straight Pneumatic Die Grinder | Model: 61H120G4 | Series: 61 Pro Series | Rated Power: 1.25 HP (0.93 kW) | Maximum Free Speed: 12,000 RPM | Collet Size: 1/4" | Exhaust: Side | Length: 15.5" (393 mm) | Weight: 4.3 lbs (1.9 kg) | Air Consumption at Load: 37 CFM (1,048 L/min) | Air Inlet: 3/8" NPT | Minimum Hose Size: 1/2" (13 mm) | Sound Pressure Level: 83.6 dB(A) | Sound Power Level: 94.6 dB(A) | Vibration Level: Less than 2.5 m/s²

Features:

• Powerful vane motor delivers 1.25 HP for grinding and material removal in metal fabrication and production environments.
• 12,000 RPM maximum free speed supports the use of appropriately rated carbide burrs and mounted grinding accessories.
• Built-in mist lubricator supplies lubrication to the air motor, helping reduce internal wear during operation.
• Integrated motor controller helps regulate tool speed for consistent grinder operation.
• Grit rejection system helps limit abrasive contamination of internal components in grinding environments.
• Metal housing withstands harsh working conditions and repeated handling in fabrication shops, foundries, and steel mills.
• Extended-length, low-profile straight configuration provides access to recessed surfaces, internal features, and areas that are difficult to reach with shorter grinders.
• Side exhaust directs discharged compressed air away from the rear of the tool, while the 1/4-inch collet accommodates compatible shank-mounted abrasives.

Applications:

• Metal fabrication and welding shops: Removing weld irregularities, smoothing welded joints, and preparing metal edges for subsequent finishing operations.
• Foundries and casting operations: Grinding casting flash, removing burrs, and cleaning accessible internal and external casting surfaces.
• Steel mills and metal processing facilities: Performing localized grinding, surface cleanup, and edge preparation on metal components.
• Tool and die maintenance: Deburring machined features, refining accessible profiles, and performing controlled material removal with suitable carbide burrs.
• Shipyard and heavy equipment fabrication: Cleaning welded assemblies, finishing metal components, and reaching recessed areas during fabrication or repair.
• Industrial maintenance and MRO: Removing burrs, cleaning component edges, and preparing metal surfaces during equipment repair and refurbishment.

FAQs:

• Q: What grinding accessories can be used with the Ingersoll Rand 61H120G4?

  A: The grinder features a 1/4-inch collet for compatible shank-mounted accessories, such as carbide burrs and mounted grinding points. Every accessory must be approved for use with a die grinder and have a maximum operating speed of at least 12,000 RPM. Observe the accessory manufacturer's limits on diameter, overhang, and intended application.

• Q: How much compressed air does the 61H120G4 require?

  A: Ingersoll Rand specifies 37 CFM air consumption at load, a 3/8-inch NPT air inlet, and a minimum recommended hose diameter of 1/2 inch. The compressor and air distribution system must be capable of providing the required airflow at the manufacturer's specified operating pressure, particularly during extended grinding operations.

• Q: What is the benefit of the built-in mist lubricator?

  A: The built-in mist lubricator supplies lubricant to the air motor during operation, helping protect moving components from wear. Operators should still follow Ingersoll Rand's maintenance instructions and use the recommended lubricants and air preparation equipment.

• Q: Is the 61H120G4 suitable for grinding in hard-to-reach areas?

  A: Yes. Its 15.5-inch overall length and low-profile straight configuration provide additional reach for working on recessed surfaces, casting features, and internal metal components. Confirm that the tool and selected grinding accessory have sufficient clearance for safe operation.

• Q: What is the difference between the 61H120G4 and 61H150G4 die grinders?

  A: The 61H120G4 operates at 12,000 RPM with 1.25 HP, while the 61H150G4 operates at 15,000 RPM with 1.33 HP. Both models feature a 1/4-inch collet and side exhaust. The appropriate choice depends on the required accessory operating speed, material removal task, and available compressed air capacity.

Looking for more information about the Ingersoll Rand Grinder? Click here to view the Catalog

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