Carbonized Steel Drill
Carbon steel drill bits (often categorized into low-carbon and high-carbon steel) are traditional, economical tools primarily used for drilling through soft materials like wood, plastics, and soft metals. Because they lack the advanced red-hardness of High-Speed Steel (HSS) or cobalt, they require lower operating speeds to avoid overheating
Description
Carbonized Steel Drill
Carbon steel drill bits (often categorized into low-carbon and high-carbon steel) are traditional, economical tools primarily used for drilling through soft materials like wood, plastics, and soft metals. Because they lack the advanced red-hardness of High-Speed Steel (HSS) or cobalt, they require lower operating speeds to avoid overheating
Key Features
- Composition: Forged from simple carbon steel alloys containing carbon content generally ranging from 0.6% to 1.7%, providing initial structural strength.
- Initial Hardness: Delivers a sharp cutting edge and good rigidity suitable for precision work on soft work places.
- Affordability: Offers an economical, budget-friendly alternative to High-Speed Steel (HSS) or solid carbide when heavy-duty performance is not required.
Limitations
- Lower Heat Resistance: Loses its hardness quickly as frictional temperatures rise during drilling.
- Increased Brittleness: More prone to warping, dulling, or breaking under high torque, sustained friction, or fast rotational speeds compared to HSS or carbide
Specification
| Specification Category | Parameter | Typical Standard Value |
|---|---|---|
| Specification Parameter | Standard Range / Value | Description & Application Context |
| Material Base | Low-Carbon Steel or High-Carbon Steel | High-carbon variants are hardened and heat-treated for improved durability. |
| Diameter Range | 0.5 mm to 25 mm+ (1/16" to 1") | Commonly available in metric (0.1mm–1mm increments) and fractional sizes. |
| Drill Point Angle | 118° (Standard) | A 118° angle offers an aggressive cut ideal for mild steel, wood, and plastic. |
| Helix Angle | ~25° to 30° | Standard spiral geometry designed for efficient chip evacuation in softer materials. |
| Shank Type | Straight / Round Shank or Hex Shank | Round shanks fit standard chucks; hex shanks prevent slipping in high-torque tasks. |
| Length Designations | Jobber Length, Stub Length, or Long Reach | Jobber length typically features a flute length 9–14 times the cutting diameter. |
| Hardness Capacity | Up to 200–220 HB (Brinell) | Ideal for low-hardness panels and non-alloyed steels. |
| Surface Finish | Black Oxide, Bright/Polished, or Bare | Polished or bare finishes are common; black oxide can be applied to reduce friction. |
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