IRWIN 10502538 Twist Drill Bit Set 1 cm 5 Pieces

The IRWIN 10502538 Twist Drill Bit Set offers 5 pieces of high-performance 1 cm twist drill bits engineered for precise drilling applications. Manufactured to DIN 338 standards, these HSS Cobalt drill bits feature a robust 5% cobalt alloy composition that provides exceptional heat and abrasion resistance during demanding workshop and construction tasks. The heavy-duty web construction ensures structural strength, while the 135-degree split point geometry allows the bit to begin drilling immediately on contact, effectively minimizing bit walking and ensuring accurate hole placement.

Advantages

These cobalt twist drill bits deliver superior durability and efficient performance when working with challenging materials. The inclusion of 5% cobalt significantly extends tool life under high operating temperatures, making them reliable for continuous professional use. The precision-engineered 135-degree split point reduces the required feed force and prevents slipping on hard surfaces, resulting in clean, exact holes without extensive pre-punching.

Suitable for

• Drilling alloyed steel
• Working with stainless steel
• General metal drilling
• Tough and hardened heat-treated metals
• Workshop and construction applications

When it may not be suitable

This drill bit set is specifically engineered for metalworking applications and may not be the optimal choice for drilling soft materials like wood or plastics, where specialized geometries are required to prevent clogging. Additionally, these bits are not designed for masonry, concrete, or stone drilling tasks.

Key specifications

• Twist drill bit type
• Drill bit diameter: 1 cm
• Length: 133 mm
• 5 pieces per set
• 5% cobalt HSS material
• 135° split point
• Cylindrical shank
• Manufactured to DIN 338 standards

How to use

Insert the cylindrical shank of the twist drill bit securely into the chuck of your compatible drilling machine and tighten evenly. Ensure the workpiece is firmly clamped in place before starting the operation. Align the 135-degree split point with your marked drilling location, apply steady and moderate axial pressure, and maintain an appropriate rotational speed suitable for metal drilling. Use cutting fluid or lubricant during extended drilling sessions to reduce heat buildup and prolong the lifespan of the cobalt bits.

What to consider before purchase

• Verify that a 1 cm drill bit diameter matches your project requirements
• Confirm compatibility with your drill chuck and machine type
• Assess the hardness and type of materials you intend to drill

Usage recommendations: Always wear appropriate personal protective equipment, including safety glasses and gloves, when operating drilling tools. Maintain recommended drilling speeds and use proper lubrication to prevent overheating and premature wear of the cobalt drill bits.