Ingersoll Rand 8255-101-1 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 10,000 RPM free speed and double gear reduction. The -1 configuration provides a 1-1/4 in. (32 mm) stroke, making it suitable for drilling applications that require controlled, repeatable spindle travel. The product listing identifies a 5/16 in. capacity and a 5/16 in. standard chuck.
The Par-A-Matic self-feed system uses a double-acting air piston to provide controlled forward and retract strokes. Needle-valve controls allow adjustment of the feed and retract strokes, while the 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 production equipment. Ball-bearing spindle support provides precision spindle guidance, and the muffled exhaust helps provide a quieter work environment. The manufacturer specification lists 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: 8255-101-1 | Capacity: 5/16 in. | Motor Power: 0.50 HP (.37 kW) | Free Speed: 10,000 RPM | Gear Reduction: Double | Stroke Length: 1-1/4 in. (32 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)
Features:
- The built-in four-way valve permits both manual and remote operation.
- The double-acting air piston provides smooth, 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.
- Ball-bearing spindle support provides precision spindle guidance.
- The muffled exhaust helps provide a quieter work environment during pneumatic operation.
- Double gear reduction provides the specified drive configuration for the 10,000 RPM model.
- The 1-1/4 in. stroke provides controlled spindle travel for compatible production fixtures.
- The 5/16 in. standard chuck accommodates compatible drill tooling within the manufacturer's specified capacity.
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 1-1/4 in. stroke matches the required spindle travel.
- Secondary machining — adding controlled drilling cycles to manufacturing equipment without continuous manual feed control.
- Metalworking — drilling compatible materials within the manufacturer's material-specific capacity ratings.
- Automated drilling equipment — using the built-in four-way valve for manual or remote operation in suitable pneumatic control systems.
FAQs:
- Q: What is the free speed of the 8255-101-1?
A: The 8255-101-1 has a 10,000 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 8255-101 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 motor power?
A: The 8255-101-1 uses a 0.50 HP (.37 kW) pneumatic motor. The supplied product title shows “.05 HP,” but the manufacturer and product specifications identify the correct rating as 0.50 HP. - 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: What is the air consumption?
A: Air consumption is 2.3 ft³/cycle (65 L/cycle) at working speed. - Q: Can the 8255-101-1 be operated remotely?
A: Yes. The built-in four-way valve permits both manual and remote operation. - Q: What are the material-specific nominal drilling capacities?
A: The manufacturer table 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. No Type 304 stainless-steel capacity is listed for the 8255-101 family.
| SKU | STROKE LENGTHS IN (MM) |
FREE SPEED RPM |
*NOMINAL DRILLING CAPACITIES | THRUST @ 90PSI LBS (N) |
AIR CONSP.‡ AT WORKING SPEED FT³/CYCLE (L/CYCLE) |
SOUND LEVEL DBA |
STANDARD CHUCK CAPACITY IN (MM) |
GEAR REDUCTION |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|
| STAINLESS STEEL TYPE 304 |
STEEL SAE 1213 |
ALUMINUM 2024-T4 |
WOOD MED. OR FRP |
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| BANT-A-MATIC SERIES | |||||||||||
| 8245-203-1* | 1-1/4” (32) | 19,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8245-101-1 | 1-1/4” (32) | 10,000 | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | Double | ||||
| 8245-B45-1 | 1-1/4” (32) | 4,400 | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | 5/32 (4.0) | 90 (400) | 1.5 (42) | 77 | 1/4 (6.4) | Single |
| 8245-B30-1 | 1-1/4” (32) | 2,700 | 1/16 (1.6) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8245-B8-1 | 1-1/4” (32) | 900 | 3/32 (2.4) | 3/16 (4.8) | 1/4 (6.4) | 5/16 (7.9) | Double | ||||
| 8245-203-2 | 2.0” (51) | 19,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8245-101-2 | 2.0” (51) | 10,000 | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | Double | ||||
| 8245-B45-2 | 2.0” (51) | 4,400 | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | 5/32 (4.0) | 90 (400) | 1.5 (42) | 77 | 1/4 (6.4) | Single |
| 8245-B30-2 | 2.0” (51) | 2,700 | 1/16 (1.6) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8245-B8-2 | 2.0” (51) | 900 | 3/32 (2.4) | 3/16 (4.8) | 1/4 (6.4) | 5/16 (7.9) | Double | ||||
| 8245-203-3 | 3.0” (76) | 19,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8245-101-3 | 3.0” (76) | 10,000 | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | Double | ||||
| 8245-B45-3 | 3.0” (76) | 4,400 | 1/32 (0.8) | 1/16 (1.6) | 1/8 (3.2) | 5/32 (4.0) | 90 (400) | 1.5 (42) | 77 | 1/4 (6.4) | Single |
| 8245-B30-3 | 3.0” (76) | 2,700 | 1/16 (1.6) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8245-B8-3 | 3.0” (76) | 900 | 3/32 (2.4) | 3/16 (4.8) | 1/4 (6.4) | 5/16 (7.9) | Double | ||||
| PAR-A-MATIC SERIES | |||||||||||
| *8255-172-1 | 1-1/4” (32) | 17,000 | — | 1/64 (0.4) | 1/32 (0.8) | 1/16 (1.6) | Single | ||||
| 8255-101-1 | 1-1/4” (32) | 10,000 | — | 1/32 (0.8) | 1/16 (1.6) | 5/32 (4.0) | Double | ||||
| 8255-A50-1 | 1-1/4” (32) | 5,000 | — | 5/64 (2.0) | 3/16 (4.8) | 3/16 (4.8) | Single | ||||
| 8255-A28-1 | 1-1/4” (32) | 2,800 | 1/16 (1.6) | 9/64 (3.6) | 1/4 (6.4) | 1/4 (6.4) | Single | ||||
| 8255-A21-1 | 1-1/4” (32) | 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 (7.9) | Single |
| 8255-A14-1 | 1-1/4” (32) | 1,450 | 5/32 (4.0) | 1/4 (6.4) | 5/16 (7.9) | 3/8 (9.5) | Double | ||||
| 8255-A8-1 | 1-1/4” (32) | 850 | 11/64 (4.4) | 9/32 (7.1) | 21/64 (8.3) | 25/64 (9.9) | Double | ||||
| 8255-A5-1 | 1-1/4” (32) | 500 | 1/4 (6.4) | 5/16 (7.9) | 11/32 (8.7) | 13/32 (10.3) | Double | ||||
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- Type
- Feed Drill
- RPM
- 10000
- Gear Reduction
- Double
- Stroke Length (in.)
- 1-1/4
- Stroke Length (mm)
- 32
- Nominal Drilling Capacities Wood Med. or FRP
- 5/32 (4.0)
- Nominal Drilling Capacities Steel SAE 1213
- 1/32 (0.8)
- Nominal Drilling Capacities Aluminum 2024-T4
- 1/16 (1.6)
- Capacity (in.)
- 5/16
- Power (hp)
- .05
- Air Inlet
- 1/4" NPT Male
- Hose Size (in.)
- 5/16
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