These premium High-Speed Steel (HSS) Blacksmith Drill Bits feature a standardized 13mm (1/2") reduced shank, allowing large-diameter holes to be drilled using a standard 1/2-inch or 13mm 3-jaw drill chuck. Manufactured to DIN 338 and BS328 standards, these ground flute bits feature a steam-tempered black oxide finish and a 118° point angle for clean, efficient boring through steel, iron, copper, aluminum, wood, and plastic.
| Technical Attribute | Specification Details |
| Product Type | Blacksmith / Reduced Shank Drill Bit |
| Material | High-Speed Steel (HSS), Ground Flute |
| Finish / Color | Steam-Tempered Black Oxide |
| Point Angle / Helix | 118° Standard Point Angle + Standard Helix |
| Shank Diameter | 13mm (1/2 Inch) Reduced Straight Shank |
| Overall Length | 150mm (All Sizes) |
| Flute Length | 76mm to 80mm |
| Manufacturing Standards | DIN 338 & BS328 Compliant |
| Pack Quantities | 1, 2, 5, or 10 Pieces |
All drill bit diameters share a uniform 13mm shank and 150mm overall length, enabling rapid bit changes without swapping chuck adapters:
| Metric Drill Size | Shank Diameter | Overall Length | Compatible Chucks | Primary Material Compatibility |
| 13.5mm to 16.5mm | 13mm (1/2") | 150mm | Standard 1/2" (13mm) 3-Jaw Chuck | Steel, Iron, Aluminum, Plastics |
| 17.0mm to 20.0mm | 13mm (1/2") | 150mm | Portable Drills & Drill Presses | Structural Steel, Copper, Hardwood |
| 21.0mm to 26.0mm | 13mm (1/2") | 150mm | Heavy Duty Hand Drills & Presses | Sheet Metal, Cast Iron, Non-Ferrous Metals |
Available Sizes: 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm.
1/2" Reduced Shank Design: Fits standard portable electric drills, cordless drivers, and benchtop drill presses equipped with a 13mm chuck, eliminating the need for expensive Morse taper sleeves.
Precision Ground Flute & 118° Point: Delivers rapid chip evacuation, reduces friction, and provides clean hole positioning without wandering.
Steam-Tempered Black Oxide Finish: Holds cutting fluid effectively to reduce heat buildup and extend tool lifespan during high-torque metal boring.
Industrial Grade Versatility: Engineered to drill through structural steel, iron, brass, copper, aluminum, dense plastics, and wood.
What is a reduced shank drill bit?
A reduced shank drill bit has a cutting end larger than its shank. This allows standard 1/2-inch (13mm) drill chucks to bore large-diameter holes (up to 26mm) without upgrading to a larger drill press or Morse taper spindle.
Will these drill bits fit a standard hand drill?
Yes, as long as your hand drill or drill press chuck accepts a 13mm (1/2-inch) shank diameter.
What materials can these HSS drill bits cut through?
They are designed for drilling mild steel, cast iron, copper, aluminum, alloy metals, hardwood, and hard plastics. Using cutting fluid on metals is recommended for best results.