Twist drill bit Irwin 10502565 — diameter 1 cm, 1 piece

Irwin 10502565 is a single twist drill bit with a nominal diameter of 1 cm designed for general drilling operations. Manufactured in accordance with DIN 338 standards and produced from high-speed steel with 5% cobalt, this HSS cobalt drill bit offers improved heat and abrasion resistance suitable for demanding metalworking tasks. The bit is supplied as one piece and fits standard chucks, making it compatible with a wide range of electric and cordless drills.

Advantages

The HSS cobalt composition with 5% cobalt increases hardness at elevated temperatures and improves wear resistance during extended cutting, while the heavy-duty web construction enhances strength and reduces the risk of breakage. A 135° split point reduces bit walking and enables rapid penetration without the need for a pilot hole in many metal applications. The geometry and construction support consistent hole quality and longer service life under heavy-duty conditions.

Suitable for

• Drilling holes in alloy and hardened steels
• General metal fabrication and maintenance work
• Use in portable drills, drill presses, and handheld power tools with standard chucks
• Situations requiring heat-resistant and abrasion-resistant bits

Key specifications

• Type: Twist drill bit
• Material: High-speed steel with cobalt (≈5% cobalt)
• Nominal diameter: 1 cm
• Point angle: 135° split point
• Standards: Manufactured to DIN 338
• Construction: Heavy-duty web
• Pack quantity: 1 piece

How to use

Secure the drill bit firmly in the chuck and ensure the workpiece is clamped or otherwise immobilized. Select an appropriate spindle speed and feed rate for the material being drilled; lower speeds and steady feed are generally recommended for hardened or abrasive alloys to reduce heat build-up. Use cutting fluid or coolant when drilling metals to extend tool life and improve hole finish. Withdraw the bit periodically to clear chips when drilling deep holes.

Usage recommendations

For optimal performance on hardened steels and abrasive alloys, run the drill at moderate speeds, apply steady feed, and use a suitable cutting lubricant. Inspect the bit for wear or damage before use and replace when the cutting edges become dull to avoid poor hole quality and excessive heat generation.