Drill bit set ALPEN Cassette HSS Cobalt Jobber KP 19, sizes 1–10 mm step 0.5 mm

ALPEN Cassette HSS Cobalt Jobber KP 19 drill bit set comprises high-speed steel bits with cobalt alloy designed for drilling a wide range of metals and hard materials. The set includes sizes from 1.0 mm to 10.0 mm in 0.5 mm steps, supplied in a cassette for organised storage and quick size selection. Jobber-length geometry provides a balanced combination of reach and rigidity for general workshop and industrial applications.

Advantages

The HSS cobalt material improves heat resistance and edge life compared with standard HSS, helping to maintain cutting performance under higher temperatures and tougher materials. The step size of 0.5 mm ensures fine gradation of drill diameters for precise hole sizing. The cassette keeps bits secure and arranged for fast identification, reducing downtime during tool changes.

Suitable for

• Drilling in steel and stainless steel
• Drilling in cast iron and non-ferrous metals
• Workshop and maintenance drilling tasks
• Professional metalworking and fabrication

Key specifications

• Material: high-speed steel with cobalt alloy
• Size range: 1.0 mm to 10.0 mm
• Step increment: 0.5 mm
• Length type: jobber length
• Packaging: cassette for storage and organisation

How to use

Select the correct drill diameter from the cassette and secure it in the drill chuck with proper clamping. Use appropriate cutting speed and feed for the specific material being drilled; reduce speed and apply steady feed when working with stainless steel or hard alloys. Use cutting fluid or coolant when drilling metals to reduce heat, improve tool life and assist chip evacuation. Ensure the workpiece is firmly clamped and aligned to maintain hole accuracy and operator safety.

Usage recommendations

For best results when drilling hard or stainless steels, start with a pilot hole where applicable, use a suitable coolant, and replace worn bits to avoid oversized or misformed holes. Inspect bits regularly for chipping or wear and match drilling speeds to material hardness.