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Home > Blog > HSS-Co Drill Bit – High-Precision Cobalt Drill for CNC Applications

HSS-Co Drill Bit – High-Precision Cobalt Drill for CNC Applications

HSS-Co drill bit

Oct 09, 2025

HSS-Co Drill Bit: Accuracy, Durability, and Work in Industry

In the precision machining, metalworking, and industrial fabrication arena, the tools that you use will directly affect productivity, quality, and reliability. The HSS-Co drill bit is one of those and is a versatile and high-performance cutting tool designed to drill through hard metals, stainless steel, and alloys with high accuracy. In Accurate Cut, we offer drill bits such as cobalt drill bits of HSS and industrial drill bits, CNC HSS-Co bits to suit the demanding needs of the industry workshops and machine shops.

HSS-Co Drill Bits

HSS-Co bits are made of high-speed steel (HSS) containing a cobalt content of 5-8 percent. This cobalt reinforcement increases hardness, wear resistance, and heat tolerance, allowing the drill bit to cut through hard metals without dropping its edge.

  • Cobalt drill bits made of high-speed steel are intended to be used in industry.
  • Drill bits reinforced with cobalt retain cutting ability at high temperatures produced during high-speed drilling.
  • HSS-Co twist drills are accurate in the hole diameter and depth, and can be used when hand-drilling or CNC machining.

HSS-Co drill bit is used in the area of stainless steel, hard metals, automobile parts, and industrial machines because of its great longevity, elevated heat tolerance, and superior cutting performance.

Features of HSS-Co Drill Bits

HSS-Co bits are loaded with features, which make them indispensable in industrial use:

  • Increased Wear Resistance and Hardness: The cobalt alloy would have better longevity, and these bits can be used on hard metallic materials.
  • High Heat Resistance: Allows drilling at faster speeds without reducing the life of the tool.
  • Sharp Cutting Edges: Geared towards reducing friction and proper drilling performance.
  • Versatility: It can be used on steel, stainless steel, and aluminum, as well as on softer metals.
  • Durability: minimizes tool breakage and provides uniform machining.

Incorporating HSS-Co drill bit in stainless steel, hard metals, or industrial construction, these tools provide high-end production that reduces downtime and brings the highest efficiency.

Types of HSS-Co Drill Bits

Industrial HSS-Co Drill Bits

  • Intended to be used in high-volume and heavy-duty applications.
  • An able type of drilling metal constituents and alloys in factories.
  • Best suited to the precision drilling of industrial equipment.

CNC HSS-Co Drill Bits

  • Computer-controlled machine optimization.
  • Make hole quality consistent and minimize tool wear during automated operations.
  • Suited to CNC drilling and machining tools.

HSS-Co Drill Bit Sets

  • Comes in various formats to suit a workshop.
  • Applicable to general metalworking, fabrication, and maintenance.
  • Best in small machine shops or home industrial installations.

Advanced Cobalt Drill Bits

  • Machined to optimum performance in stainless steel and hard alloys.
  • Keep it sharp with repetitive use to save on downtime and replacement.
  • Applicable in metal fabrication exercises as well as in automotive parts drilling exercises.

Technical HSS-Co Drill Bit Advantages

HSS-Co bits have several technical advantages over regular HSS drill bits:

  • Accuracy of Precision Holes: Cobalt reinforcement holds edge geometry during high stress.
  • High Speed: This is the best suited to use in situations where there is a need to drill at a high speed without this at the cost of quality.
  • Hard Cutting Edges: Reduce deformation and fracturing during high-pressure drilling.
  • General Purpose: HSS-Co bits offer good performance in drilling stainless steel and alloy steel.

Industrial operations are highly productive with the use of HSS-Co metal cutting drill bits because the products are highly finished with low rework and wastage of materials.

HSSE Countersink Drill: Plus Precision Tool

Besides the HSS-Co bits, HSSE countersink drills are also highly accurate and offer smooth treatment of the hole chamfering.

Attributes of HSSE Countersink Drill

  • Material: Hardness and heat resistance: high-speed steel with cobalt (HSSE).
  • Optimized cutting edge: This allows a smooth chamfering without scarring the workpiece.
  • Angle: 90 degrees, appropriate for steel, stainless steel, aluminum, and plastics.
  • Uses the Construction of conical and deburring countersinking in batch-processing applications.

Advantages:

  • Integrated debris removal design results in batch processing efficiency.
  • Blade is reworkable to create long-life tools.
  • Rapid chamfering of holes within seconds enhances productivity in the workshop.
  • Suitable for soft or black metals with long cutting edges.

When HSS-Co bits are used with HSSE countersink drills, machinists have been able to produce high-quality holes and improve their operating efficiency.

The RHSS-Co Drill Bit

With selecting an HSS-Co drill bit, take into account the following:

  • Drilled Material: Stainless steel, alloy steel, or soft metals.
  • Drill Type: Select among hand drills, CNC HSS-Co bits, or industrial HSS-Co drills.
  • Hole Diameter, Depth: This should be compatible with your project requirements.
  • Tool Coating: HSS-Co bits are available with TiN or other coatings to minimize friction and ensure long life.
  • Set or Individual Drill: Workshop sets are flexible in diameter.

Our HSS-Co drill bits in Accurate Cut meet industry standards and are manufactured in a high-precision drill bit, very durable, and always with consistent results.

Benefits of Making Purchases in Accurate Cut

  • Bought machining centers and precise manufacturing testing equipment.
  • Tablet tools, including drills, reamers, taps, and blades of numerous types, standard and custom.
  • Industrial applications: Automobile, aerospace, mold processing, electronics, and fabrication in general.
  • Custom solutions: Products produced based on drawings, samples, or customer specifications.

HSS-Co bits and HSSE countersink drills are levelled to enhance the efficiency of machining, minimize downtimes, and provide high-quality finishes in any industrial or workshop setting.

Conclusion

The HSS-Co drill bit is a keystone in the modern metalworking, CNC machining, and fabrication industry. High-speed steel cobalt drills, CNC drill bits, and HSSE countersink drills all offer unsurpassed durability, precision, and performance. High-speed steel drill bits and HSSE countersink drills of Accuratecut, where innovation and industrial precision meet, are available today to upgrade your workshop with drill bits and HSSE countersink drills.

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