
Ingersoll Rand 8268-A25-1 Self-Feed Twin Drill is designed for automated production drilling applications where two machining operations can be performed during each cycle. This 3/8" capacity Super Par-A-Matic Series twin drill combines a 0.75 HP pneumatic motor with a 2,500 RPM free speed and single gear reduction to provide controlled drilling performance. Its adjustable dual-spindle configuration lets the tool handle close-center machining while reducing machining time and parts handling.
The 8268-A25-1 features a 1-1/2" stroke and is equipped with built-in valve-in-head controls for self-contained operation. The double-acting air piston provides controlled forward and retract strokes, while needle valve controls let you adjust those strokes. An adjustment screw provides infinite stroke-length settings up to 3.0", giving production equipment designers flexibility when configuring the drilling cycle.
Type: Self-Feed Twin Drill | Series: Super Par-A-Matic | Capacity: 3/8" (9.5 mm), Steel | Power: 0.75 HP (0.56 kW) | Free Speed: 2,500 RPM | Stroke Length: 1-1/2" (38 mm) | Gear Reduction: Single | Air Consumption: 2.9 ft³/cycle (82 L/cycle) @ 90 PSI | Sound Level: 77 dB(A) | Standard Chuck Capacity: 1/2" (12.7 mm)
Features:
- Twin-drill configuration performs two machining operations per cycle, helping reduce machining time and parts handling.
- Adjustable dual spindle heads allow the tool to be configured for changing machining requirements.
- 3/8" steel drilling capacity provides the specified drilling capability for the Super Par-A-Matic Series.
- 0.75 HP pneumatic motor delivers the power required for automated production drilling.
- 2,500 RPM free speed provides controlled rotary performance for production drilling applications.
- Double-acting air piston provides smooth, controlled forward and retract strokes.
- Needle valve controls allow adjustment of forward and retract stroke characteristics.
- Adjustment screw provides infinite stroke-length settings up to 3.0" maximum.
- Muffled exhaust helps reduce operating noise in production environments.
NON RETURNABLE. MADE TO ORDER.
Applications:
- Automated production drilling where two holes or machining operations are performed during each cycle.
- Close-center machining applications requiring adjustable dual spindles.
- Production drilling of steel components within the specified 3/8" capacity.
- Manufacturing systems requiring integrated pneumatic spindle rotation and feed functions.
- Secondary machining operations where reduced parts handling and cycle time are important.
FAQs:
- Q: What is a self-feed twin drill?
A: A self-feed twin drill combines two adjustable drilling spindles with pneumatic spindle rotation and feed functions, allowing two machining operations to be performed during a cycle. - Q: What is the drilling capacity of the 8268-A25-1?
A: The Super Par-A-Matic Series has a specified capacity of 3/8" (9.5 mm) in steel. The individual nominal drilling capacities vary by material and should be considered when selecting the tool for a specific application. - Q: What is the stroke length of this model?
A: The 8268-A25-1 has a 1-1/2" (38 mm) stroke length. The adjustment screw provides infinite stroke-length settings up to a 3.0" maximum. - Q: What is the recommended operating pressure?
A: Performance data for the tool is specified at 90 PSI (6.2 bar). The recommended operating pressure for the Super Par-A-Matic Series is 90 PSI (6.2 bar). - Q: What chuck capacity does this model use?
A: The standard chuck capacity listed for the Super Par-A-Matic Series is 1/2" (12.7 mm).
| 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 |
||||||||
| PAR-A-MATIC SERIES (continued) | |||||||||||
| 8258-C50-3 | 3.0" (76) | 5,000 | 1/16 (1.6) | 1/8 (3.2) | 1/8 (3.2) | Single | |||||
| 8258-C28-3 | 3.0" (76) | 2,800 | 3/64 (1.2) | 1/8 (3.2) | 3/16 (4.5) | 3/16 (4.5) | Single | ||||
| 8258-C21-3 | 3.0" (76) | 2,100 | 5/64 (1.9) | 5/32 (4.0) | 7/32 (5.6) | 7/32 (5.6) | 170 (756) | 2.3 (65) | 74 | 1/4 (6.4) | Single |
| 8258-C14-3 | 3.0" (76) | 1,450 | 7/64 (2.7) | 3/16 (4.5) | 1/4 (6.4) | 1/4 (6.4) | Double | ||||
| 8258-C8-3 | 3.0" (76) | 850 | 11/64 (4.3) | 1/4 (6.4) | 9/32 (7.1) | 9/32 (7.1) | Double | ||||
| 8258-C5-3 | 3.0" (76) | 500 | 1/4 (6.4) | 1/4 (6.4) | 5/16 (7.9) | 5/16 (7.9) | Double | ||||
| SUPER PAR-A-MATIC SERIES (continued) | |||||||||||
| 8268-A46-1 | 1-1/2" (38) | 4,600 | 1/4 (6.4) | 3/16 (4.8) | Single | ||||||
| 8268-A25-1 | 1-1/2" (38) | 2,500 | 1/16 (1.6) | 1/4 (6.4) | 5/16 (7.9) | 5/16 (7.9) | Single | ||||
| 8268-A12-1 | 1-1/2" (38) | 1,200 | 1/8 (3.2) | 5/16 (7.9) | 11/32 (8.7) | 3/8 (9.5) | 250 (1112) | 2.9 (82) | 77 | 3/8 (9.5) | Double |
| 8268-A6-1 | 1-1/2" (38) | 650 | 13/64 (5.2) | 11/32 (8.7) | 3/8 (9.5) | 7/16 (11.1) | Double | ||||
| 8268-A3-1 | 1-1/2" (38) | 350 | 5/16 (7.9) | 3/8 (9.5) | 13/32 (10.3) | 15/32 (11.9) | Double | ||||
| 8268-A46-3 | 3.0" (76) | 4,600 | 1/4 (6.4) | 3/16 (4.8) | Single | ||||||
| 8268-A25-3 | 3.0" (76) | 2,500 | 1/16 (1.6) | 1/4 (6.4) | 5/16 (7.9) | 5/16 (7.9) | Single | ||||
| 8268-A12-3 | 3.0" (76) | 1,200 | 1/8 (3.2) | 5/16 (7.9) | 11/32 (8.7) | 3/8 (9.5) | 250 (1112) | 2.9 (82) | 77 | 3/8 (9.5) | Double |
| 8268-A6-3 | 3.0" (76) | 650 | 13/64 (5.2) | 11/32 (8.7) | 3/8 (9.5) | 7/16 (11.1) | Double | ||||
| 8268-A3-3 | 3.0" (76) | 350 | 5/16 (7.9) | 3/8 (9.5) | 13/32 (10.3) | 15/32 (11.9) | Double | ||||
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- Type
- Feed Drill
- RPM
- 2500
- Gear Reduction
- Single
- Stroke Length (in.)
- 1-1/2
- Nominal Drilling Capacities Wood Med. or FRP
- 5/16 (7.9)
- Nominal Drilling Capacities Stainless Steel Type 304
- 1/16 (1.6)
- Nominal Drilling Capacities Steel SAE 1213
- 1/4 (6.4)
- Nominal Drilling Capacities Aluminum 2024-T4
- 5/16 (7.9)
- Capacity (in.)
- 3/8
- Power (hp)
- 0.75
- Air Inlet
- 1/4" NPT Male
- Recommended Hose Size ID (in.)
- 3/8