Bosch 2608639022

Bosch STEMPEL UNI. GNA stamping punch set contains three punches with diameters 1.3 mm, 1.6 mm and 2.0 mm, designed for accurate marking, piercing and forming of small holes in soft metals, plastics and thin sheet materials. The set is intended for workshop and maintenance environments where repeatable, controlled hole sizes and clear centre marks are required. Construction and finish of the punches focus on precision tip geometry and durable material suitable for hand and light-duty press use.

Advantages

The set offers a range of small-diameter punches that provide consistent hole size and repeatable results across multiple materials. Compact and easy to handle, each punch is shaped for reliable alignment and reduced slipping when struck or pressed. The punches are suitable for use with simple hand tools or light bench presses, giving flexibility for both on-site repairs and bench work. Their sizes cover common fine marking and hole-making needs without requiring additional machining.

Suitable for

• Precision marking and centre-punching on soft metals (e.g., aluminium and copper)
• Creating starter holes in plastics and thin sheet materials prior to drilling
• Workshop maintenance, assembly and repair tasks requiring controlled hole diameters
• Manual and light-press operations where small, repeatable perforations are needed

Key specifications

• Punch diameters: 1.3 mm, 1.6 mm, 2.0 mm
• Intended materials: soft metals, plastics, thin sheet materials
• Usage mode: hand striking or light press operation
• Finish: precision-machined tips for consistent results

How to use

Select the punch size appropriate for the required hole or mark. Position the punch tip at the desired location on a stable workpiece supported by a solid backing to avoid deformation. Hold the punch perpendicular to the surface for an accurate centre mark or hole start, then apply a controlled strike with a hammer or use a light press to form the hole or indentation. For plastics and thin sheets, reduce striking force to prevent tearing; for metals, use steady, controlled impacts and inspect the result before proceeding to drilling or finishing.

Usage recommendations

Maintain the punches by keeping tips clean and free of burrs; lightly strop or hone tips if minor deformation occurs. Store the set in a dry place to avoid corrosion and handle with appropriate eye protection when striking. Choose punch diameter according to pilot hole and final finishing needs to ensure efficient subsequent drilling or assembly.