Ingersoll Rand 8255-101-2 is a Par-A-Matic Series Self-Feed Air Drill designed for repetitive production drilling and fixture-mounted machining where controlled spindle feed and retract movement are required. This model combines a 0.50 HP (.37 kW) pneumatic motor with a free speed of 10,000 RPM and a double gear reduction. The -2 configuration provides a 2 in. (51 mm) stroke, giving production fixtures additional spindle travel for drilling cycles that require an extended feed stroke. The model uses a 5/16 in. standard chuck, while the manufacturer's nominal drilling capacities are specified by workpiece material.
The Par-A-Matic self-feed system uses a double-acting air piston for controlled forward and retract strokes. Needle-valve controls allow adjustment of the forwarding and retracting strokes, 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 controlled spindle guidance, and the muffled exhaust helps reduce operating noise. The manufacturer specifies 170 lb (756 N) thrust at 90 PSI, 2.3 ft³/cycle (65 L/cycle) air consumption at working speed, and a sound level of 74 dB(A).
Type: Self-Feed Air Drill | Series: Par-A-Matic | Model: 8255-101-2 | Capacity: 5/16 in. Standard Chuck | Motor Power: 0.50 HP (.37 kW) | Free Speed: 10,000 RPM | Gear Reduction: Double | 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) | Standard Chuck Capacity: 5/16 in. (7.9 mm) | 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.
- Double gear reduction provides the drive configuration specified for the 10,000 RPM model.
- The double-acting air piston provides controlled forward and retract strokes.
- Needle-valve controls allow adjustment of the forwarding and retracting 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 compared with the 1-1/4 in. configuration of the same model family.
NON-RETURNABLE. MADE TO ORDER.
Applications:
- Production drilling — performing repeatable drilling 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 drilling equipment — incorporating the self-feed drill into suitable pneumatic production machinery.
- Secondary machining — adding controlled drilling cycles to manufacturing equipment without continuous manual feed control.
- Small-hole drilling — performing material-specific drilling operations within the manufacturer's nominal capacity ratings.
FAQs:
- Q: What is the free speed of the 8255-101-2?
A: The 8255-101-2 has a 10,000 RPM free speed. - Q: What does the “-2” suffix indicate?
A: The -2 configuration identifies the 2 in. (51 mm) stroke version of the 8255-101 model family. - Q: What does double gear reduction mean?
A: It identifies the double gear reduction configuration used in the spindle drive of this 10,000 RPM model. - Q: What is the standard chuck capacity?
A: The standard chuck capacity is 5/16 in. (7.9 mm). - Q: What are the nominal drilling capacities?
A: The manufacturer lists 1/32 in. (0.8 mm) in SAE 1213 steel, 1/16 in. (1.6 mm) in 2024-T4 aluminum, and 5/32 in. (4.0 mm) in wood, medium or FRP. Stainless-steel capacity is listed as NA for this model. - Q: How much thrust does the drill provide?
A: The manufacturer specifies 170 lb (756 N) thrust at 90 PSI. - Q: What is the air consumption?
A: Air consumption is specified at 2.3 ft³/cycle (65 L/cycle) at working speed. - Q: Can the 8255-101-2 be operated remotely?
A: Yes. The built-in four-way valve permits both manual and remote operation. - Q: What pneumatic connections are specified?
A: The listed configuration uses a 1/4 in. NPT male air inlet, 1/8 in. NPTF female control ports, a 1/2"-20 male spindle thread, and a recommended 5/16 in. hose I.D.
| 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 | ||||
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