Drill bit AWTools AW42040 — pack of 10

AWTools AW42040 — pack of 10 high-speed steel drill bits designed for general-purpose drilling. Each bit is made of HSS-Co high-speed steel containing 5% cobalt and is precision ground with two cutting edges and a centering point featuring a 135° point angle. The set is supplied in a case and is intended for use with compatible handheld or bench drills where this AWTools size and geometry are required.

Advantages

The HSS-Co composition with 5% cobalt increases heat resistance and wear life compared with standard HSS, while precision grinding ensures accurate hole sizes and smooth cutting action. The two-cutting-edge geometry and 135° centering point reduce walking at the start of drilling and improve performance on both alloyed and unalloyed steels. Supplied as a pack of 10 in a storage case, the set offers consistent bit geometry across multiple pieces for repeatable results.

Suitable for

• Drilling alloyed and unalloyed steel
• Drilling grey cast iron
• Working with non-ferrous metals (aluminium, brass, copper)
• Drilling plastic components
• Use with handheld and bench drills for general workshop tasks

Key specifications

• Material: HSS-Co high-speed steel with 5% cobalt
• Tip geometry: 135° centering point
• Cutting edges: precision ground, two cutting edges
• Pack quantity: 10 pieces, supplied in a case
• Intended use: rotary drilling for metals and plastics

How to use

Select a drill speed appropriate for the material being drilled and secure the workpiece. Fit the AWTools AW42040 bit in the drill chuck and tighten securely. Start drilling at low speed to engage the 135° centering point, then increase speed to match the material and bit diameter. Use cutting fluid or coolant when drilling alloyed steels to prolong bit life and reduce heat. Clear chips frequently to avoid clogging and maintain cutting efficiency.

Usage recommendations

For best results, use moderate feed pressure and appropriate cutting fluid for steel and alloyed materials. Replace bits when wear affects hole accuracy or increases heat generation. Store the bits in their case to protect the precision-ground edges.