Ingersoll Rand 8255-A50-1 Self-Feed Air Drill | 5/16" Capacity | .05 HP | 5,000 RPM | Single Gear Reduction

Ingersoll Rand 8255-A50-1 is a Par-A-Matic Series Self-Feed Air Drill intended for repetitive drilling and fixture-mounted machining where controlled spindle feed and retract movement are needed. This model combines a 0.50 HP (.37 kW) pneumatic motor with a 5,000 RPM free speed and single gear reduction. The -1 configuration provides a 1-1/4 in. (32 mm) stroke, giving production equipment a controlled amount of spindle travel for repeatable drilling cycles. The supplied product title lists a 5/16 in. capacity.

The Par-A-Matic self-feed arrangement uses a double-acting air piston for controlled forward and retract strokes. Needle-valve controls adjust the forward and retract movement, while an adjustment screw provides infinite stroke-length settings. A built-in four-way valve permits manual or remote operation, allowing the drill to be incorporated into suitable pneumatic production equipment. Ball-bearing spindle support provides precision spindle guidance, and the muffled exhaust helps reduce operating noise. The supplied source information does not establish additional model-specific material capacities or pneumatic connection details clearly enough to add them without verification.

Type: Self-Feed Air Drill | Series: Par-A-Matic | Model: 8255-A50-1 | Capacity: 5/16 in. | Motor Power: 0.50 HP (.37 kW) | Free Speed: 5,000 RPM | Gear Reduction: Single | Stroke Length: 1-1/4 in. (32 mm)

Features:

• The self-feed configuration provides controlled forward and retract movement for repeatable drilling cycles.
• The 0.50 HP pneumatic motor supplies spindle power for the drilling operation.
• Single gear reduction provides the drive configuration specified for the 5,000 RPM model.
• The double-acting air piston provides controlled forward and retract strokes.
• Needle-valve controls allow adjustment of the forward and retract strokes.
• The adjustment screw provides infinite stroke-length settings for controlled feed travel.
• The built-in four-way valve permits both manual and remote operation.
• Ball-bearing spindle support provides precision spindle guidance.
• The muffled exhaust helps provide quieter pneumatic operation.

NON-RETURNABLE. MADE TO ORDER.

Applications:

• Production drilling — performing repetitive holemaking operations where controlled pneumatic feed and retract movement are required.
• Fixture-mounted machining — integrating the self-feed drill into dedicated fixtures where the 1-1/4 in. stroke matches the required spindle travel.
• Secondary machining — adding repeatable drilling cycles to production equipment without continuous manual feed control.
• Metalworking — performing compatible drilling operations within the manufacturer's specified tooling and material limits.
• Automated manufacturing equipment — using the four-way valve for manual or remote operation where the pneumatic control system supports the application.

FAQs:

• Q: What is the free speed of the 8255-A50-1?
  A: The 8255-A50-1 has a 5,000 RPM free speed.
• Q: What does the “-1” suffix indicate?
  A: The -1 configuration identifies the 1-1/4 in. (32 mm) stroke version of the 8255-A50 model family.
• Q: What does single gear reduction mean?
  A: It identifies the single gear reduction configuration used in the spindle drive of this 5,000 RPM model.
• Q: What is the motor power?
  A: The correct motor rating is 0.50 HP (.37 kW). The supplied title states “.05 HP,” which appears to be a typographical error and should not be published as the motor rating.
• Q: What is the listed drilling capacity?
  A: The supplied product title identifies the 8255-A50-1 with a 5/16 in. capacity. The exact material-specific capacity should be confirmed against the manufacturer catalog before publishing additional material claims.
• Q: Can the self-feed drill be operated remotely?
  A: Yes. The built-in four-way valve permits manual or remote operation.
• Q: What is the stroke length?
  A: The -1 configuration provides a 1-1/4 in. (32 mm) stroke.

Looking for more information about Ingersoll Rand Self-Feed Air Drill? Click here to view the Catalog

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