Premium Letter Drills – Jobber Length (013409) are engineered for precision, durability, and high‑performance drilling in a wide range of industrial applications. Whether you’re a seasoned machinist, a production line technician, or a DIY enthusiast, these jobber‑length letter drills deliver consistent, clean holes in steel, stainless steel, aluminum, brass, and other tough materials.
Key Features & Benefits
- Jobber Length Design: Optimized 2‑inch (50 mm) shank length provides excellent balance, torque transmission, and chip evacuation for faster, more efficient drilling.
- High‑Speed Steel (HSS) Construction: Made from premium HSS with a precise 118° point angle for superior cutting performance and heat resistance.
- Letter Marking System: Each drill is stamped with a clear alphanumeric identifier, ensuring quick selection and inventory control in high‑volume settings.
- Flute Geometry: Deep, twisted flutes improve chip removal and reduce the risk of drill binding, extending tool life.
- Versatile Material Compatibility: Ideal for drilling mild steel, stainless steel, copper alloys, aluminum, and plastics.
- Enhanced Surface Finish: Produces smooth, burr‑free holes that often eliminate the need for secondary deburring operations.
Technical Specifications
| Specification | Detail |
|---|
| Part Number | 013409 |
| UPC | 086839134093 |
| Length (Overall) | 2‑in (50 mm) jobber length |
| Shank Diameter | 0.250 in (6.35 mm) |
| Material | High‑Speed Steel (HSS) |
| Point Angle | 118° |
| Coating | Standard (optional black oxide or TiN upgrades available) |
| Maximum RPM | 4,000 rpm (subject to machine capability) |
| Application | Metalworking, fabrication, maintenance, automotive, aerospace, and general engineering. |
Why Choose Our Letter Drills?
When you need reliable performance on the shop floor, our LETTER DRILLS – JOBBER LENGTH 013409 stand out because they combine the proven durability of high‑speed steel with a thoughtfully engineered geometry that reduces heat buildup and tool wear. The jobber length offers the perfect balance between rigidity and flexibility, allowing you to reach deep holes without sacrificing accuracy.
Ideal Applications
- Machining of shafts, bolts, and fasteners
- Pre‑drilling for tapping and thread‑forming operations
- Production line drilling for automotive and aerospace components
- Maintenance and repair tasks in industrial facilities
- Prototyping and custom fabrication projects
Installation & Use Tips
- Secure the drill bit in a chuck with a firm grip to prevent slippage.
- Start drilling at a low speed to establish the pilot hole, then increase RPM as needed.
- Apply cutting fluid or oil when drilling harder materials to extend tool life.
- Periodically withdraw the drill to clear chips and prevent overheating.
- Inspect the drill tip regularly for wear; replace when the cutting edge becomes rounded.
Compatibility & Accessories
These jobber‑length letter drills are compatible with standard 3‑jaw and 4‑jaw chucks, collet systems, and magnetic drill presses. Pair them with our range of drill presses, cutting fluids, and bit holders for a complete, high‑efficiency drilling solution.
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