Drill Bit ALPEN Cassette HSS Cobalt Jobber Drill Bit TM 6, set sizes 2,3,4,5,6,8 mm

Set of ALPEN Cassette HSS Cobalt Jobber Drill Bit TM 6 includes metric sizes 2, 3, 4, 5, 6 and 8 mm in a compact cassette. Manufactured from high-speed steel with cobalt alloy, these jobber-length drill bits are engineered for improved heat resistance and wear performance compared with standard HSS. The set is intended for general-purpose drilling tasks in metals and other hard materials and is compatible with both handheld and stationary drills. The cassette format provides organised storage and quick selection of the required size.

Advantages

HSS cobalt construction offers increased hardness and greater resistance to elevated temperatures during continuous drilling, extending tool life under demanding conditions. The jobber length and ground point geometry enable efficient chip evacuation and accurate centring, reducing wandering at drill start. The assorted metric sizes in a single cassette allow fast size changes on the job and tidy storage to protect cutting edges.

Suitable for

• Drilling through ferrous metals such as steel and stainless steel (thin to medium sections)
• Working with non-ferrous metals like aluminium, brass and copper
• General workshop and site repairs with handheld and pillar drills
• Maintenance tasks where a compact, organised bit set is required

Key specifications

• Material: high-speed steel with cobalt alloy for improved heat and wear resistance
• Lengths: jobber length suitable for general-purpose drilling
• Included sizes: 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm
• Shank type: round shank for standard drill chucks
• Packaging: rigid cassette for organised storage and easy transport

How to use

Select the required diameter from the cassette and fit the drill bit securely in the drill chuck. Use appropriate cutting speeds and feed rates for the material being drilled; reduce speed for harder materials and stainless steels to limit heat build-up. Apply suitable cutting fluid or coolant when drilling metals to improve tool life and chip evacuation. Maintain firm, steady pressure—avoid excessive force—to allow the bit to cut efficiently and prevent breakage of smaller diameters.

Usage recommendations

For best results when drilling stainless steel or other hard alloys, start with a centre punch to prevent wandering, use lower rotational speed, and apply a suitable cutting fluid. Store the bits in their cassette to keep sizes organised and protect cutting edges between uses.