Center Drill Bit Set YOKOCUT M35 HSS Cobalt TiAlN Coated 1‑5mm 7pcs

Description

Product Overview

The YOKOCUT Center Drill Bit Set is engineered for precision and durability in demanding metalworking environments. Each bit is forged from M35 HSS cobalt alloy, containing approximately 8% cobalt, and receives a nano TiAlN coating that raises surface hardness to roughly 89 HRC. This combination delivers superior wear resistance, reduced heat buildup, and extended tool life when drilling stainless steel, alloy steel, cast iron, copper, brass, aluminum, and other hard metals. The set includes seven metric sizes ranging from 1 mm to 5 mm, each featuring a 120° split‑point geometry and dual‑helix flutes that promote rapid chip evacuation and stable drilling performance. The bits are mirror‑polished, sandblasted for an anti‑friction surface, and maintain a radial runout of ≤0.03 mm, ensuring consistent centering accuracy across a wide range of workpiece diameters.

Usage

These center drill bits excel in applications that require precise alignment of holes before subsequent drilling or reaming operations. Ideal for preparing workpiece centers on rotary tables, CNC machines, and manual drill presses, the set supports tasks such as mold base preparation, fixture alignment, and countersink pre‑drilling. The robust construction allows use on hardened tool steels, aerospace alloys, and high‑strength cast irons without premature wear. Whether you are a professional machinist, a maintenance technician, or a serious hobbyist, the set provides the confidence needed to start holes accurately, reduce material waste, and improve overall machining efficiency.

Why Choose Us

YOKOCUT brings over two decades of expertise in cutting‑tool technology, and this center drill bit set reflects that heritage. The M35 cobalt core delivers exceptional toughness, while the TiAlN coating adds a protective barrier against oxidation and thermal softening. Each bit is stored in a rugged, impact‑resistant case that safeguards the cutting edges from debris and accidental drops on the job site. Additionally, the set is backed by a 90‑day performance guarantee, ensuring prompt replacement or support if any issue arises. Our commitment to quality control, combined with responsive customer service, makes this set a reliable investment for long‑term machining projects.

Key Features

• High‑hardness M35 cobalt alloy with nano TiAlN coating for extended tool life
• Seven metric sizes (1‑5 mm) cover a broad range of centering applications
• 120° split‑point geometry and dual‑helix flutes provide fast chip evacuation and stable drilling
• Mirror‑polished, sandblasted surface reduces friction and improves accuracy
• 90‑day performance guarantee and dedicated after‑sales support for peace of mind

FAQ

What materials can these center drill bits handle?

The bits are designed for stainless steel (304/316), hardened tool steels, carbon steel, cast iron, copper, brass, aluminum, and other non‑ferrous alloys. They also work well on wood and composite materials when a precise starting point is required.

How do I maintain the TiAlN coating?

After each use, clean the bits with a soft brush and a mild solvent to remove chips and coolant residue. Avoid abrasive cleaning tools that could scratch the coating. Store the bits in the supplied case to protect the coating from impact and contamination.

Can I use these bits in a CNC machine?

Yes, the set’s tight radial runout (≤0.03 mm) and robust construction make them suitable for CNC spindle use. Ensure the machine’s spindle speed and feed rates are set according to the material being drilled to maximize performance.

What is the warranty coverage?

The 90‑day performance guarantee covers manufacturing defects and premature wear under normal operating conditions. Contact YOKOCUT customer service with your purchase details for a replacement or repair.

Is the storage case included?

Yes, each set comes with a compact, impact‑resistant case that securely holds all seven bits, protecting them from damage and making transport to job sites convenient.