Designed for controlled production drilling, the Ingersoll Rand 8258-C21-1 self-feed twin drill combines a 1/4" drilling capacity, 0.50 HP pneumatic motor, 2,100 RPM free speed, and single gear reduction to deliver accurate, repeatable drilling performance in demanding manufacturing environments. Its integrated self-feed mechanism automatically advances the drill into the workpiece, helping improve hole consistency, reduce operator fatigue, and increase productivity during repetitive drilling operations.
The twin drill configuration is designed to support simultaneous drilling operations, making it well suited for applications where multiple holes must be produced with consistent spacing and alignment. Built for continuous-duty industrial service, the 8258-C21-1 provides dependable pneumatic performance for aerospace, transportation equipment, fabrication, and general manufacturing applications requiring precision drilling and repeatable production results.
Type: Self-Feed Twin Drill | Drilling Capacity: 1/4 in. | Power: 0.50 HP | Free Speed: 2,100 RPM | Gear Reduction: Single Gear Reduction
Features:
- Self-feed mechanism automatically advances the drill for consistent hole quality and reduced operator effort.
- Twin drill configuration supports simultaneous drilling operations to improve manufacturing productivity.
- 0.50 HP pneumatic motor delivers dependable performance for continuous-duty industrial drilling applications.
- 2,100 RPM free speed provides controlled drilling for precision production work.
- Single gear reduction provides efficient power transmission for reliable and consistent drilling performance.
- Designed for repetitive manufacturing operations where drilling accuracy and repeatability are essential.
- Pneumatic operation supports dependable performance in automated and semi-automated production environments.
Applications:
- Production drilling in aerospace and aircraft manufacturing.
- Simultaneous hole drilling for fabricated and assembled components.
- Transportation equipment and vehicle component manufacturing.
- Industrial fabrication requiring controlled, repeatable drilling operations.
- General manufacturing applications where consistent multi-hole drilling improves production efficiency and product quality.
FAQs:
- Q: What is the benefit of a self-feed drill?
A: A self-feed drill automatically advances into the workpiece at a controlled rate, helping improve hole consistency while reducing operator fatigue during repetitive production drilling. - Q: Why is a twin drill configuration useful?
A: The twin drill configuration is designed to support simultaneous drilling operations, helping improve productivity where multiple holes must be drilled accurately and consistently. - Q: Why does this drill operate at 2,100 RPM?
A: The 2,100 RPM free speed provides controlled drilling performance, making it suitable for production applications where accuracy and repeatability are priorities. - Q: What is the purpose of the single gear reduction?
A: The single gear reduction provides efficient power transmission for smooth, dependable drilling performance throughout continuous manufacturing operations.
NON RETURNABLE. MADE TO ORDER.
| 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 |
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Stainless Steel Type 304 |
Steel SAE 1213 |
Aluminum 2024-T4 |
Wood Med. or FRP |
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| BANT-A-MATIC SERIES | |||||||||||
| 8248-B45-1 | 1-1/4" (32) | 4,400 | 1/32 (.78) | 1/16 (1.6) | 3/32 (2.4) | 3/32 (2.4) | Single | ||||
| 8248-B30-1 | 1-1/4" (32) | 2,700 | 1/16 (1.6) | 3/32 (2.4) | 1/8 (3.2) | 1/8 (3.2) | 90 (400) | 1.5 (42) | 77 | 5/32(4.0) | Single |
| 8248-B8-1 | 1-1/4" (32) | 900 | 1/8 (3.2) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Double | ||||
| 8248-B45-2 | 2.0" (51) | 4,400 | 1/32 (.78) | 1/16 (1.6) | 3/32 (2.4) | 3/32 (2.4) | Single | ||||
| 8248-B30-2 | 2.0" (51) | 2,700 | 1/16 (1.6) | 3/32 (2.4) | 1/8 (3.2) | 1/8 (3.2) | 90 (400) | 1.5 (42) | 77 | 5/32(4.0) | Single |
| 8248-B8-2 | 2.0" (51) | 900 | 1/8 (3.2) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Double | ||||
| 8248-B45-3 | 3.0" (76) | 4,400 | 1/32 (.78) | 1/16 (1.6) | 3/32 (2.4) | 3/32 (2.4) | Single | ||||
| 8248-B30-3 | 3.0" (76) | 2,700 | 1/16 (1.6) | 3/32 (2.4) | 1/8 (3.2) | 1/8 (3.2) | 90 (400) | 1.5 (42) | 77 | 5/32(4.0) | Single |
| 8248-B8-3 | 3.0" (76) | 900 | 1/8 (3.2) | 1/8 (3.2) | 3/16 (4.8) | 3/16 (4.8) | Double | ||||
| PAR-A-MATIC SERIES | |||||||||||
| 8258-C50-1 | 1-1/4" (32) | 5,000 | 1/16 (1.6) | 1/8 (3.2) | 1/8 (3.2) | Single | |||||
| 8258-C28-1 | 1-1/4" (32) | 2,800 | 3/64 (1.2) | 1/8 (3.2) | 3/16 (4.5) | 3/16 (4.5) | Single | ||||
| 8258-C21-1 | 1-1/4" (32) | 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-C14-1 | 1-1/4" (32) | 1,450 | 7/64 (2.7) | 3/16 (4.5) | 1/4 (6.4) | 1/4 (6.4) | Double | ||||
| 8258-C8-1 | 1-1/4" (32) | 850 | 11/64 (4.3) | 1/4 (6.4) | 9/32 (7.1) | 9/32 (7.1) | Double | ||||
| 8258-C5-1 | 1-1/4" (32) | 500 | 1/4 (6.4) | 1/4 (6.4) | 5/16 (7.9) | 5/16 (7.9) | Double | ||||
| 8258-C50-2 | 2.0" (51) | 5,000 | 1/16 (1.6) | 1/8 (3.2) | 1/8 (3.2) | Single | |||||
| 8258-C28-2 | 2.0" (51) | 2,800 | 3/64 (1.2) | 1/8 (3.2) | 3/16 (4.5) | 3/16 (4.5) | Single | ||||
| 8258-C21-2 | 2.0" (51) | 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-C14-2 | 2.0" (51) | 1,450 | 7/64 (2.7) | 3/16 (4.5) | 1/4 (6.4) | 1/4 (6.4) | Double | ||||
| 8258-C8-2 | 2.0" (51) | 850 | 11/64 (4.3) | 1/4 (6.4) | 9/32 (7.1) | 9/32 (7.1) | Double | ||||
| 8258-C5-2 | 2.0" (51) | 500 | 1/4 (6.4) | 1/4 (6.4) | 5/16 (7.9) | 5/16 (7.9) | Double | ||||
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