Drill bit set Proline 10840 — 2 pcs, length 75 mm, for M5 threads

Proline 10840 is a set of two 75 mm drill bits specifically designed to prepare holes for M5 threads. These solid drill bits are intended for use with standard drilling tools to create accurate pilot holes for tapping or installing M5 fasteners. The compact two-piece pack is suitable for workshop and on-site metalworking and general assembly tasks that require consistent hole diameter and straightness for reliable thread cutting.

Advantages

The drill bits provide consistent hole size and runout control at the length required for typical M5 tapping operations. Their 75 mm length gives enough reach for through-holes and shallow blind holes while remaining rigid for stable drilling. The two-piece set ensures a spare bit is available, reducing downtime during assembly or repair work. Designed for compatibility with common handheld and bench drilling equipment, the bits simplify preparation of threaded connections.

Suitable for

• Preparing pilot holes for M5 threaded fasteners
• Metalworking tasks requiring accurate hole diameter
• General assembly and maintenance work
• Workshop and on-site drilling with handheld or bench drills

Key specifications

• Quantity: 2 pieces
• Length: 75 mm
• Intended thread size preparation: M5
• Compatibility: standard drill chucks and holders
• Typical applications: metalworking and general assembly

How to use

Select a suitable drill chuck and secure the bit straight and tight. Mark the drilling position and, if necessary, clamp the workpiece to prevent movement. Use appropriate cutting speed and lubrication for the material being drilled to extend bit life and improve hole quality. Drill to the required depth, then proceed with tapping or inserting the M5 fastener. Replace the bit with the spare from the set when wear affects hole accuracy.

Usage recommendations

Use cutting fluid when drilling steel or alloys to reduce heat and wear. Start drilling at a low speed to establish a clean entry, then increase speed within the tool and material limits. Inspect bits regularly for wear and burrs, and replace them when the hole diameter or finish degrades.