Ingersoll Rand 8670-28-3AM High-Thrust Pneumatic Self-Feed Drill | 3" Stroke | 5/8" Capacity | 1.25 HP | 2,800 RPM

Ingersoll Rand 8670-28-3AM Pneumatic Self-Feed Drill provides a fixtured drilling solution for production machinery and automated assembly systems. Part of the High-Thrust 8670 Series, this drill features a 1.25 HP pneumatic motor, 2,800 RPM free speed, and 3-inch stroke length. The self-feed mechanism automatically advances and retracts the drill spindle, reducing the need for manual feeding during repeated drilling cycles. Its 500 lbs thrust rating at 90 PSI provides the axial force required to advance the cutting tool into suitable workpiece materials. This model features a 3/4-inch capacity drill chuck and a muffled exhaust arrangement for production drilling applications.

The 8670-28-3AM incorporates a dual-piston feed system that provides increased forward thrust while supporting rapid spindle retraction. An adjustable hydraulic check controls the feed rate, allowing operators to regulate cutting advance and chip formation or control drill breakthrough. The drill also features dead-stop and dwell controls for repeatable depth settings within 0.001 inch. Its pneumatic control module regulates the feed cycle and motor functions, while the modular motor and gearing arrangement facilitates servicing and speed changes. A single external lubrication point simplifies gear-train maintenance, and the muffled exhaust reduces operating noise. The tool operates at 90 PSI with a 3/8-inch NPT male air inlet and a recommended 5/8-inch inside-diameter air hose.

Type: Pneumatic Self-Feed Drill | Model: 8670-28-3AM | Series: High-Thrust 8670 Series | Power: 1.25 HP | Free Speed: 2,800 RPM | Stroke Length: 3 in. | Nominal Drilling Capacity in Type 304 Stainless Steel: 3/16 in. | Nominal Drilling Capacity in SAE 1213 Steel: 1/4 in. | Nominal Drilling Capacity in 2024-T4 Aluminum: 9/16 in. | Nominal Drilling Capacity in Medium Wood or FRP: 5/8 in. | Spindle Thread: 5/8"-16 Male | Air Inlet: 3/8 in. NPT Male | Recommended Hose Size: 5/8 in. I.D. | Recommended Operating Pressure: 90 PSI

Features:

• 1.25 HP pneumatic motor delivers 2,800 RPM free speed for automated drilling in suitable metals and other machinable materials.
• 3-inch stroke length provides controlled spindle travel for repeated drilling cycles in fixture-mounted applications.
• 500 lbs thrust at 90 PSI supports drilling operations requiring substantial axial feed force.
• Dual-piston feed system develops increased forward thrust and supports faster retraction to help reduce cycle time.
• Adjustable hydraulic check provides positive feed-rate control for regulating chip size and drill breakthrough.
• Dead-stop and dwell controls provide repeatable drilling-depth accuracy within 0.001 inch.
• Modular motor, gearing, and replaceable control module simplify maintenance and allow speed changes without replacing the complete drilling system.
• Single external gear train lubrication point and muffled exhaust support routine servicing and reduced operating noise.

Applications:

• Automated manufacturing: Performing repetitive drilling operations in production fixtures and pneumatic machining stations.
• Metal component fabrication: Drilling holes in suitable stainless steel, carbon steel, and aluminum workpieces within the specified capacities.
• Automotive component production: Integrating controlled drilling cycles into fixtures for brackets, housings, and mechanical subassemblies.
• Industrial machining systems: Combining pneumatic spindle rotation and automatic feed control for repeatable drilling operations.
• Composite and wood machining: Drilling suitable fiber-reinforced plastic and medium-density wood components using compatible cutting tools.

FAQs:

• Q: What are the speed and stroke specifications of the Ingersoll Rand 8670-28-3AM?
  A: The 8670-28-3AM operates at 2,800 RPM free speed and provides a 3-inch stroke. Its automatic feed mechanism advances and retracts the spindle during the drilling cycle.
• Q: What is the drilling capacity of the 8670-28-3AM?
  A: The manufacturer specifies nominal drilling capacities of 3/16 inch in Type 304 stainless steel, 1/4 inch in SAE 1213 steel, 9/16 inch in 2024-T4 aluminum, and 5/8 inch in medium wood or fiber-reinforced plastic. Actual drilling performance depends on the cutting tool, material, feed settings, and operating conditions.
• Q: What do the A and M suffixes indicate?
  A: The A suffix identifies the 3/4-inch capacity chuck configuration, while M identifies the muffler exhaust option. These codes distinguish the 8670-28-3AM from other drive and exhaust configurations in the 8670 Series.
• Q: How is the drilling feed rate controlled?
  A: The drill uses an adjustable hydraulic check to regulate the spindle's forward feed rate. The setting can be adjusted for cutting conditions, chip formation, and breakthrough control, while dead-stop and dwell functions support repeatable drilling depth.
• Q: What compressed-air supply does the 8670-28-3AM require?
  A: The manufacturer recommends 90 PSI operating pressure, a 3/8-inch NPT male air inlet, and a 5/8-inch inside-diameter supply hose. Air consumption is listed as 5.0 cubic feet during a typical six-second operating cycle, rather than as a continuous CFM rating.

NON-RETURNABLE. MADE TO ORDER.

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