3/16" X 4-1/4" COBALT INDUSTRIAL DRILL BIT, 135° SPLIT POINT
- Buy 20 or more $3.49 Save 13%
- Buy 50 or more $2.99 Save 25%
- Buy 100 or more $2.69 Save 33%
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3/16" X 4-1/4" COBALT INDUSTRIAL DRILL BIT, 135° SPLIT POINT
Engineered for high-performance drilling in tough materials, this 3/16" cobalt drill bit provides exceptional heat resistance and durability. The 135° split-point tip prevents 'walking' for precise, clean holes in stainless steel, cast iron, and other hardened alloys.
- M35 (5% Cobalt) Material
- 135° Split-Point Geometry
- High Heat Resistance (up to 1100°F)
- Stainless Steel & Hard Metals
This industrial-grade 3/16" x 4-1/4" drill bit is forged from M35 high-speed steel, an alloy containing 5% cobalt. This composition significantly increases red hardness, allowing the bit to maintain its cutting edge at high temperatures (up to 1100°F) encountered when drilling hardened materials. The precision-ground flutes ensure efficient chip evacuation, reducing friction and heat buildup. This design delivers superior tool life and consistent performance in demanding fabrication and MRO environments, outlasting standard HSS bits when working with abrasive or tough metals.
The 135° split-point tip is self-centering, eliminating the need for a center punch and ensuring accurate hole placement from the start. This geometry requires less thrust to initiate drilling, making it ideal for both handheld drills and stationary drill presses. This cobalt drill bit is the professional's choice for drilling into stainless steel, hardened steel, cast iron, and titanium. Its robust construction makes it an essential tool for metal fabricators, automotive technicians, and maintenance professionals requiring reliable drilling solutions.
Specifications
- Material: M35 High-Speed Steel (5% Cobalt)
- Standards: Manufactured to meet ANSI/ASME B94.11M dimensional standards
- Point Geometry: 135° Split Point, Self-Centering
- Dimensions: Diameter: 3/16", Overall Length: 4-1/4"
- Finish: Gold Oxide / Bronze Finish
- Heat Resistance: Up to 1100°F
Applications
- Fabrication & Welding: Drilling pilot holes in stainless steel frames, structural steel, and custom metal parts.
- Automotive & Machinery Repair: Removing broken bolts, drilling into engine blocks, and modifying chassis components.
- Industrial Maintenance (MRO): Repairing heavy equipment, drilling into machinery housings, and facility maintenance tasks.
- Aerospace & Tooling: Creating precise holes in tough alloys and tool steels where heat generation is a concern.
Target Users
Designed for professional metalworkers, mechanics, MRO technicians, and fabricators who require a durable, high-performance bit for drilling hard and abrasive metals.
Finish Options
Cobalt drill bits typically feature a gold oxide or bronze-colored surface finish. This is a result of the heat treatment process and is not a coating, but rather an integral part of the bit that helps identify it as a cobalt alloy and provides minor heat and corrosion resistance.
How to Measure
Drill bit dimensions are specified by diameter and length. The diameter is the width of the cutting head. Overall length (OAL) is measured from the tip to the end of the shank. Ensure you select the correct diameter for your hole requirement and a length sufficient for the depth of material.
Example: 3/16" Diameter x 4-1/4" OAL, Cobalt Drill Bit, 135° Split Point
Order Checklist
- Verify drill bit diameter and required length
- Specify material: Cobalt (for hard metals)
- Confirm quantity required for your project
- Add cutting fluid or lubricant for optimal tool life
- Confirm same-day pickup or delivery requirements
Quick Facts
- Product
- 3/16" X 4-1/4" Cobalt Industrial Drill Bit, 135° Split Point
- Material
- M35 Cobalt Steel (5% Co)
- Standards
- ANSI/ASME B94.11M (Dimensional)
- Key Properties
- High heat resistance (1100°F), self-centering 135° split point, drills hard metals.
- Primary Applications
- Stainless Steel, Cast Iron, Hardened Alloys
- Location
- Los Angeles warehouse - Same-day pickup available
Available Sizes
We stock a wide range of industrial cobalt drill bits in fractional, letter, and number sizes. Common diameters range from 1/16" up to 1/2" and beyond, available in jobber (standard) and mechanic (shorter) lengths.
Custom sizes and large-quantity orders are available.
Contact for Sizing-
3/16" X 4-1/4" COBALT INDUSTRIAL DRILL BIT, 135° SPLIT POINT$3.99
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1/2 Cobalt Drill Bit$5.99 -
1/8 Cobalt Drill Bit$4.97 -
1/4 Cobalt Drill Bit$9.35 -
