SHARS 40PC 3-Flute HSS Straight Shank Counterbore Set 404-7376

Description

Product Overview

The SHARS 40PC 3 Flute HSS Counterbore Set is engineered for precision and durability in demanding industrial environments. Each of the 40 straight shank bits is crafted from high‑speed steel (HSS), delivering superior hardness, heat resistance, and edge retention. The three‑flute design optimizes chip evacuation, reducing heat buildup and extending tool life. Sizes range from 1/4 inch to 1 inch, providing a comprehensive pilot hole and counterbore solution for a variety of bolt diameters and material thicknesses. The set includes interchangeable pilot tips, allowing users to quickly adapt to different hole sizes without changing the entire bit, enhancing workflow efficiency. Package dimensions of 17.9 x 12.3 x 3.7 inches and a weight of 7.5 pounds make storage and transport straightforward, while the robust case protects each component from impact and corrosion.

Usage

This counterbore set is ideal for professional machinists, fabricators, maintenance technicians, and hobbyist metalworkers who demand accuracy and repeatability. It excels in applications such as aerospace component assembly, automotive engine building, heavy equipment repair, and general shop maintenance where clean, concentric counterbores are essential. The straight shank design ensures compatibility with standard drill chucks and collet systems, making it suitable for use on bench drills, magnetic drills, CNC machines, and handheld power tools. Whether you are creating pilot holes for fasteners, preparing surfaces for welding, or machining precise recesses for electrical components, the SHARS set provides the reliability needed for high‑quality results.

Why Choose Us

Choosing the SHARS 40PC Counterbore Set means investing in a tool collection backed by decades of manufacturing expertise and rigorous quality control. Each bit undergoes a meticulous heat‑treatment process to achieve a uniform hardness profile, guaranteeing consistent cutting performance across the entire set. The inclusion of interchangeable pilot tips reduces the need for multiple dedicated bits, saving space and cost. Shars, a recognized brand in cutting tools, offers a comprehensive warranty and responsive customer support, ensuring that any concerns are addressed promptly. Our commitment to precision engineering translates into reduced downtime, lower tool replacement frequency, and superior finish quality for every project.

Key Features

• High‑speed steel construction provides exceptional durability and heat resistance for long‑lasting performance.
• Three‑flute geometry enhances chip removal, minimizing heat buildup and extending tool life.
• Straight shank design ensures universal compatibility with standard drill chucks and collet systems.
• Interchangeable pilot tips allow quick adaptation to various hole sizes, increasing productivity.
• Comprehensive 40‑piece set covers a wide range of sizes, reducing the need for additional tooling.
• Robust storage case protects bits from damage and keeps your workspace organized.
• Backed by Shars’ industry reputation and dedicated after‑sales support for peace of mind.

FAQ

What material are the bits made from?

All bits are forged from high‑speed steel (HSS), which offers excellent hardness, wear resistance, and the ability to cut at high speeds without losing edge integrity.

Can the set be used with a CNC machine?

Yes, the straight shank design is fully compatible with CNC drill spindles and collet holders, making it suitable for automated machining applications.

How do I change the pilot tip size?

Simply loosen the pilot tip screw, select the desired pilot tip from the included set, and tighten the screw. The interchangeable system allows rapid changes without swapping the entire bit.

Is there a warranty on this product?

Shars provides a limited one‑year warranty covering manufacturing defects, and our customer service team is ready to assist with any issues you may encounter.

What is the recommended cutting speed for these bits?

For most steel applications, a cutting speed of 30‑40 meters per minute is recommended. Adjust speed based on material hardness and thickness to achieve optimal results.