Ingersoll Rand 8255-A28-2 is a Par-A-Matic Series Self-Feed Air Drill configured for repetitive production drilling and fixture-mounted machining where controlled spindle feed and retract movement are required. Its 0.50 HP (.37 kW) pneumatic motor, 2,800 RPM free speed, and single gear reduction provide a lower-speed spindle arrangement for controlled material removal. The -2 configuration provides a 2 in. (51 mm) stroke, giving production fixtures additional spindle travel compared with the 1-1/4 in. version. The model uses a 5/16 in. standard chuck and is suited to production engineering and automated drilling applications.
The Par-A-Matic self-feed mechanism uses a double-acting air piston for controlled forward and retract strokes. Needle-valve controls allow adjustment of feed and retract movement, while the adjustment screw provides infinite stroke-length settings. A built-in four-way valve permits manual or remote operation, making the drill suitable for integration into appropriate production equipment. Ball-bearing spindle support provides precision spindle guidance, and the muffled exhaust helps reduce operating noise. The manufacturer specification for this configuration includes 170 lb (756 N) thrust at 90 PSI, 2.3 ft³/cycle (65 L/cycle) air consumption at working speed, and a 74 dB(A) sound level.
Type: Self-Feed Air Drill | Series: Par-A-Matic | Model: 8255-A28-2 | Chuck Capacity: 5/16 in. (7.9 mm) | Motor Power: 0.50 HP (.37 kW) | Free Speed: 2,800 RPM | Gear Reduction: Single | Stroke Length: 2 in. (51 mm) | Thrust: 170 lb (756 N) at 90 PSI | Air Consumption: 2.3 ft³/cycle (65 L/cycle) at working speed | Sound Level: 74 dB(A) | Air Inlet: 1/4 in. NPT Male | Control Ports: 1/8 in. NPTF Female | Spindle Thread: 1/2"-20 Male | Recommended Hose I.D.: 5/16 in. | Recommended Operating Pressure: 90 PSI (6.2 bar)
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 production drilling operations.
- Single gear reduction provides the drive configuration specified for the 2,800 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 application-specific 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.
- The 2 in. stroke provides additional spindle travel for compatible production fixtures.
NON-RETURNABLE. MADE TO ORDER.
Applications:
- Production drilling — performing repeatable holemaking cycles where controlled pneumatic feed and retract movement are required.
- Fixture-mounted machining — integrating the drill into dedicated fixtures where the 2 in. stroke provides the necessary spindle travel.
- Automated manufacturing — incorporating the self-feed drill into suitable pneumatic production equipment.
- Metalworking — carrying out material-specific drilling operations using compatible tooling and manufacturer-specified parameters.
- Secondary machining — adding controlled drilling cycles to production equipment without continuous manual feed control.
FAQs:
- Q: What is the free speed of the 8255-A28-2?
A: The 8255-A28-2 has a 2,800 RPM free speed. - Q: What does the “-2” suffix indicate?
A: The -2 configuration identifies the 2 in. (51 mm) stroke version of the 8255-A28 model family. - Q: What does single gear reduction mean?
A: It identifies the single gear reduction configuration used in the spindle drive of this 2,800 RPM model. - Q: What is the standard chuck capacity?
A: The standard chuck capacity is 5/16 in. (7.9 mm). - Q: How much thrust does this drill provide?
A: The manufacturer specifies 170 lb (756 N) thrust at 90 PSI. - Q: Can the 8255-A28-2 be operated remotely?
A: Yes. The built-in four-way valve permits both manual and remote operation. - Q: What is the difference between the 8255-A28-1 and 8255-A28-2?
A: Both configurations use the 2,800 RPM single-reduction drive, but the -1 version has a 1-1/4 in. stroke while the -2 version provides a 2 in. stroke.
| SKU | Stroke Lengths in (mm) | Free Speed rpm | Stainless Steel Type 304 | Steel SAE 1213 | Aluminum 2024-T4 | Wood Med. or FRP | Thrust @ 90psi lbs (N) | Air Consp.† at Working Speed ft³/cycle (L/cycle) | Sound Level dBa | Standard Chuck Capacity in (mm) | Gear Reduction |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PAR-A-MATIC SERIES | |||||||||||
| 8255-172-2 | 2.0" (51) | 17,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8255-101-2 | 2.0" (51) | 10,000 | — | 1/32 (0.8) | 1/16 (1.6) | 5/32 (4.0) | Double | ||||
| 8255-A50-2 | 2.0" (51) | 5,000 | — | 5/64 (2.0) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8255-A28-2 | 2.0" (51) | 2,800 | 1/16 (1.6) | 9/64 (3.6) | 1/4 (6.4) | 1/4 (6.4) | Single | ||||
| 8255-A21-2 | 2.0" (51) | 2,100 | 7/64 (2.8) | 7/32 (5.6) | 9/32 (7.1) | 5/16 (7.9) | 170 (756) | 2.3 (65) | 74 | 5/16 (79) | Single |
| 8255-A14-2 | 2.0" (51) | 1,450 | 5/32 (4.0) | 1/4 (6.4) | 5/16 (7.9) | 3/8 (9.5) | Double | ||||
| 8255-A8-2 | 2.0" (51) | 850 | 11/64 (4.4) | 9/32 (7.1) | 21/64 (8.3) | 25/64 (9.9) | Double | ||||
| 8255-A5-2 | 2.0" (51) | 500 | 1/4 (6.4) | 5/16 (7.9) | 11/32 (8.7) | 13/32 (10.3) | Double | ||||
| 8255-172-3 | 3.0" (76) | 17,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8255-101-3 | 3.0" (76) | 10,000 | — | 1/32 (0.8) | 1/16 (1.6) | 5/32 (4.0) | Double | ||||
| 8255-A50-3 | 3.0" (76) | 5,000 | — | 5/64 (2.0) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8255-A28-3 | 3.0" (76) | 2,800 | 1/16 (1.6) | 9/64 (3.6) | 1/4 (6.4) | 1/4 (6.4) | Single | ||||
| 8255-A21-3 | 3.0" (76) | 2,100 | 7/64 (2.8) | 7/32 (5.6) | 9/32 (7.1) | 5/16 (7.9) | 170 (756) | 2.3 (65) | 74 | 5/16 (79) | Single |
| 8255-A14-3 | 3.0" (76) | 1,450 | 5/32 (4.0) | 1/4 (6.4) | 5/16 (7.9) | 3/8 (9.5) | Double | ||||
| 8255-A8-3 | 3.0" (76) | 850 | 11/64 (4.4) | 9/32 (7.1) | 21/64 (8.3) | 25/64 (9.9) | Double | ||||
| 8255-A5-3 | 3.0" (76) | 500 | 1/4 (6.4) | 5/16 (7.9) | 11/32 (8.7) | 13/32 (10.3) | Double | ||||
| SUPER PAR-A-MATIC SERIES | |||||||||||
| 8265-171-1 | 1-1/2" (38) | 17,000 | — | 1/64 (0.4) | 3/32 (2.4) | 3/32 (2.4) | Single | ||||
| 8265-101-1 | 1-1/2" (38) | 10,000 | — | 3/64 (1.2) | 5/32 (4.0) | 5/32 (4.0) | Double | ||||
| 8265-46-1 | 1-1/2" (38) | 4,600 | — | 1/8 (3.2) | 1/4 (6.4) | 5/16 (7.9) | Single | ||||
| 8265-25-1 | 1-1/2" (38) | 2,500 | 3/32 (2.4) | 3/16 (4.8) | 5/16 (7.9) | 7/16 (11.1) | 250 (1112) | 2.9 (82) | 77 | 1/2 (12.7) | Single |
| 8265-12-1 | 1-1/2" (38) | 1,200 | 5/32 (4.0) | 5/16 (7.9) | 3/8 (9.5) | 9/16 (14.3) | Double | ||||
| 8265-6-1 | 1-1/2" (38) | 650 | 17/64 (6.7) | 7/16 (11.1) | 9/16 (14.3) | 5/8 (15.9) | Double | ||||
| 8265-3-1 | 1-1/2" (38) | 350 | 5/16 (7.9) | 1/2 (12.7) | 5/8 (15.9) | 11/16 (17.5) | Double | ||||
| 8265-171-3 | 3.0" (76) | 17,000 | — | 1/64 (0.4) | 3/32 (2.4) | 3/32 (2.4) | Single | ||||
| 8265-101-3 | 3.0" (76) | 10,000 | — | 3/64 (1.2) | 5/32 (4.0) | 5/32 (4.0) | Double | ||||
| 8265-46-3 | 3.0" (76) | 4,600 | — | 1/8 (3.2) | 1/4 (6.4) | 5/16 (7.9) | Single | ||||
| 8265-25-3 | 3.0" (76) | 2,500 | 3/32 (2.4) | 3/16 (4.8) | 5/16 (7.9) | 7/16 (11.1) | 250 (1112) | 2.9 (82) | 77 | 1/2 (12.7) | Single |
| 8265-12-3 | 3.0" (76) | 1,200 | 5/32 (4.0) | 5/16 (7.9) | 3/8 (9.5) | 9/16 (14.3) | Double | ||||
| 8265-6-3 | 3.0" (76) | 650 | 17/64 (6.7) | 7/16 (11.1) | 9/16 (14.3) | 5/8 (15.9) | Double | ||||
| 8265-3-3 | 3.0" (76) | 350 | 5/16 (7.9) | 1/2 (12.7) | 5/8 (15.9) | 11/16 (17.5) | Double | ||||
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
warning WARNING: This or other products sold on this website may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
