- Catalog
- Find A Branch
- KeepStock
- Help
- 1-800-GRAINGER
Register
Sign In
Sign In to access your account information.
Sign In Register for Grainger.comOrder Lookup
Track and check the status of an order.
Order LookupAll Products
Unrelated Links
Product Categories
- All Product Categories
- Abrasives
- Adhesives, Sealants and Tape
- Cleaning and Janitorial
- Electrical
- Electronics & Batteries
- Fasteners
- Fleet & Vehicle Maintenance
- Furnishings, Appliances & Hospitality
- HVAC and Refrigeration
- Hardware
- Hydraulics
- Lab Supplies
- Lighting
- Lubrication
- Machining
- Material Handling
- Motors
- Office Supplies
- Outdoor Equipment
- Packaging & Shipping
- Paints, Equipment and Supplies
- Pipe, Hose, Tube & Fittings
- Plumbing
- Pneumatics
- Power Transmission
- Pumps
- Raw Materials
- Reference and Learning Supplies
- Safety
- Security
- Test Instruments
- Tools
- Welding
Sign In
Sign In to access your account information.
Sign In Register for Grainger.comOrder Lookup
Track and check the status of an order.
Order Lookup
Cobalt Extended-Length Drill Bits
Available362 products
Cobalt extended-length drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel extended-length drill bits. They provide some shock absorption and can be used in handheld power tools. These extended-length drill bits have longer flutes and more overall length than standard jobber-length drill bits of the same size, and they have longer shanks than taper-length drill bits. Their extra length allows them to create deep holes or drill into hard-to-reach workpieces.
Material - Machining
Straw/Bronze Finish Spiral-Flute Cobalt Extended-Length Drill Bits
These drill bits have a straw/bronze finish that improves their wear resistance. The bits' spiral flutes evacuate chips as the bits drill into a workpiece.
Fractional Inch + 135 ° Drill Bit Point Angle + Split Point
| Loading... | ||||||
Wire + 135 ° Drill Bit Point Angle + Split Point
| Loading... | ||||||
| Loading... | ||||||
WXL-Coated Fast-Spiral-Flute Cobalt Extended-Length Drill Bits
Fast-spiral-flute drill bits evacuate chips more quickly than standard spiral-flute drill bits. The WXL coating on these drill bits protects them from wear and is designed for drilling nonferrous metals and steels with a Rockwell hardness of up to 50 HRC. It is harder and has a higher oxidation temperature than a TiAlN coating.
Fractional Inch + 120 ° Drill Bit Point Angle + R Thinning Point
| Loading... | ||||||
Fractional Inch + 120 ° Drill Bit Point Angle + X Thinning Point
| Loading... | ||||||
| Loading... | ||||||
Metric + 120 ° Drill Bit Point Angle + R Thinning Point
| Loading... | ||||||
Metric + 120 ° Drill Bit Point Angle + X Thinning Point
| Loading... | ||||||
| Loading... | ||||||
| Loading... | ||||||
| Loading... | ||||||
Wire + 120 ° Drill Bit Point Angle + X Thinning Point
| Loading... | ||||||