Ingersoll Rand 728JA1 Pneumatic Pistol Grip Maintenance Drill | 0.50 HP | 3,800 RPM | 3/8" Chuck Capacity

For routine drilling in repair shops, maintenance departments, and general assembly environments, the Ingersoll Rand 728JA1 Pneumatic Pistol Grip Maintenance Drill delivers high-speed operation in a compact, air-powered configuration. Part of the 728 Series, this non-reversible drill features a 3,800 RPM free speed (the rotational speed without drilling resistance), making it well suited to smaller-diameter drilling tasks where faster bit rotation is appropriate. Its 3/8" (10 mm) keyed chuck capacity accommodates drill bits with matching shank sizes, while the 0.50 HP pneumatic motor supplies power for everyday maintenance and general-purpose drilling. The pistol grip and trigger-start operation provide a familiar handling arrangement for technicians working on machinery, fabricated components, and workshop repairs.

The Ingersoll Rand 728JA1 delivers 30 in-lbs (3.4 Nm) of maximum working torque, making it the higher-speed, lower-torque option among the three models listed in the manufacturer's 728 Series maintenance drill range. Its 7.0" overall length and 2.4 lb weight, both measured with the chuck, provide a compact tool for routine drilling operations. A 0.9" side-to-center distance helps operators assess clearance near adjacent surfaces, while the 19 CFM air consumption and 1/4" NPT air inlet provide important specifications for compressed-air system selection. Ingersoll Rand positions the 728 Series as an economical general-purpose drilling range that can withstand repeated drops and harsh working environments.

Type: Pneumatic Pistol Grip Maintenance Drill | Model: 728JA1 | Series: 728 Series | Operation: Non-Reversible | Actuation: Trigger Start | Chuck Type: Keyed | Chuck Capacity: 3/8" (10 mm) | Free Speed: 3,800 RPM | Maximum Working Torque: 30 in-lbs (3.4 Nm) | Rated Power: 0.50 HP | Length with Chuck: 7.0" (177 mm) | Weight with Chuck: 2.4 lbs (1.1 kg) | Side to Center: 0.9" (23 mm) | Air Inlet: 1/4" NPT | Air Consumption: 19 CFM (538 L/min) | Sound Level: 84 dB(A)

Features:

• 3,800 RPM free speed supports faster rotation for smaller-diameter drilling applications when matched to the workpiece material and drill bit.
• 0.50 HP pneumatic motor provides power for general-purpose maintenance and workshop drilling operations.
• 3/8" heavy-duty keyed chuck secures appropriately sized drill bit shanks and allows tightening with a chuck key.
• 30 in-lbs maximum working torque provides the specified turning force for lighter drilling tasks that do not require the higher torque of slower-speed models.
• Trigger-start pistol grip configuration provides direct drill activation and a familiar handling arrangement for maintenance technicians.
• Compact 7.0" overall length and 2.4 lb weight make the tool manageable for routine servicing and repair work.
• Non-reversible operation supports forward drilling applications without an additional reverse control.
• 728 Series construction is built to withstand repeated drops and harsh working environments encountered in maintenance operations.

Made in USA: 

Applications:

• Industrial maintenance and MRO – Drilling smaller holes in machinery brackets, equipment panels, and repair components during routine plant servicing.
• Automotive and vehicle repair – Performing appropriate drilling operations on accessible vehicle components, brackets, and repair materials.
• Metal fabrication workshops – Drilling pilot holes and smaller-diameter holes in sheet metal and fabricated parts where higher rotational speed is suitable.
• General assembly and manufacturing – Carrying out non-reversing drilling tasks on fixtures, brackets, and manufactured components.
• Garage and equipment repair workshops – Supporting regular drilling work when a suitable compressed-air supply and correctly selected drill bits are available.

FAQs:

• Q: Is the Ingersoll Rand 728JA1 reversible?
  A: No. The 728JA1 is a non-reversible pneumatic drill that operates in the forward direction. It is intended for drilling tasks that do not require powered reverse rotation.
• Q: What size air compressor is required for the 728JA1?
  A: Ingersoll Rand lists air consumption of 19 CFM (538 L/min) and a 1/4" NPT air inlet. The compressor must supply adequate airflow at the operating pressure specified in the tool instructions, allowing for losses through hoses, fittings, and air preparation equipment. Confirm the compressor's delivered airflow rather than relying only on its tank capacity.
• Q: How does the 728JA1 compare with the 728LA2 maintenance drill?
  A: The 728JA1 operates at 3,800 RPM with 30 in-lbs of maximum working torque, while the 728LA2 operates at 2,100 RPM with 54 in-lbs of maximum working torque. Both models have a 3/8" chuck capacity and 0.50 HP rated power. Choose according to the rotational speed and torque required for the drilling task.
• Q: Does the 728JA1 use a keyed or keyless chuck?
  A: Model 728JA1 uses a 3/8" heavy-duty keyed chuck, which is tightened using a chuck key. Ingersoll Rand identifies the 728J6K as the corresponding 3,800 RPM model with a keyless chuck.
• Q: Can the 728JA1 drill through metal?
  A: Yes, it can be used for suitable metal-drilling applications with an appropriate drill bit, feed rate, and cutting speed. Its 3,800 RPM free speed makes drill diameter and workpiece material important considerations. Refer to the manufacturer's drilling speed guide rather than assuming maximum free speed is appropriate for every material.

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