The 21/64 Inch Cobalt RED HELIX™ Twist Drill Bit is built for maximum durability and high-performance drilling in tough metals. Designed specifically for demanding applications, this cobalt drill bit delivers exceptional strength, heat resistance, and long service life when working with stainless steel and other hard materials.
Its advanced Variable Helix™ design transitions from a 35° aggressive angle to 15°, promoting faster chip evacuation and reducing heat buildup during operation. The 135° QUAD EDGE™ split point tip provides accurate, walk-free starts for clean and precise hole placement. With four cutting edges producing smaller chips, the bit enables smoother drilling and improved efficiency.
An optimized internal taper web enhances structural integrity to help prevent breakage under heavy loads. Finished with a premium cobalt construction, this drill bit offers up to 10X longer life compared to standard black oxide bits, making it a reliable solution for professional tradespeople and industrial drilling tasks.
Key Features:
- Cobalt coating offers up to 10X longer life versus black oxide drill bits
- Perfect for twist drilling applications in hard metal
- Ideal for thick metals, stainless steel, black pipe, and clean wood
- For use with for 3-Flat SECURE GRIP shank drills and drivers
- QUAD EDGE Tip stays sharper longer
- 135° split point for precision start no walking
- Thicker Tapered Web increases bit strength and durability
- Variable Helix with 35°-15° flute geometry offers faster material extraction
- Rapid Chip Removal limits heat buildup to stay sharper longer
- 3-Flat Secure-Grip keeps the bit fixed within the chuck
What's Included:
-
1 × 21/64 Inch Cobalt RED HELIX™ Twist Drill Bit
Warranty Information:
- Milwaukee’s warranty and service details can be easily reviewed on the Milwaukee General Warranty Information page.
Specifications:
| Specifications | Details |
|---|---|
| Product Type | Cobalt Twist Drill Bit |
| Model | RED HELIX™ |
| Bit Size | 21/64 Inch |
| Point Type | 135° QUAD EDGE™ Split Point |
| Helix Design | Variable Helix™ (35° to 15°) |
| Cutting Edges | Four Cutting Edges |
| Material Composition | Cobalt Steel |
| Coating | Cobalt Finish |
| Application | Hard Metals, Stainless Steel, Heavy-Duty Drilling |
| Durability | Up to 10X Longer Life vs. Black Oxide Bits |
