Cylindrical Punch Kuźnia Sułkowice RDAa 4 mm (model 1-454-04-101) — metalworking tool

Cylindrical punch Kuźnia Sułkowice RDAa 4 mm (model 1-454-04-101) is a metalworking hand tool designed to create precise round holes, remove pins and align components. With a 4 mm nominal diameter and a straight cylindrical shaft, the punch is intended for light-duty drifting, driving and alignment tasks in workshops, repair and assembly operations. It is built to transfer controlled impact when used with manual hammers, enabling accurate results on a variety of metal and mechanical parts.

Advantages

The tool features a consistent 4 mm diameter tip for repeatable results, a hardened working end to resist deformation and a straight shank that facilitates secure gripping and controlled strikes. Its uncomplicated geometry makes it easy to position for pin removal and alignment, while the compact size supports use in confined spaces. The simple design minimizes maintenance and provides predictable performance for routine shop and field tasks.

Suitable for

• Light-duty punching of thin sheet and plate where a 4 mm diameter is required
• Removing roll pins, taper pins and dowels in mechanical assemblies
• Aligning holes and positioning parts during assembly and repair
• General drift and transfer of impact in workshop and maintenance work

Key specifications

• Nominal tip diameter: 4 mm
• Tool type: cylindrical punch for manual hammer use
• Working end: hardened tip to resist mushrooming and wear
• Shaft form: straight cylindrical shank for secure holding
• Typical applications: pin removal, hole alignment, light punching

How to use

Position the tip of the cylindrical punch on the target pin, hole edge or mark to be transferred. Hold the shank firmly with one hand or in a tool holder and strike the opposite end with a suitable manual hammer in controlled, even blows. For pin removal, start with light taps to shift the pin and increase force as needed while maintaining alignment. When punching thin material, support the workpiece on a backing plate or anvil to prevent distortion. Inspect the working end periodically and dress or replace the tool if the tip shows excessive deformation.

Usage recommendations

Use protective eyewear and gloves when striking tools. Select a hammer weight appropriate for the task to avoid overloading the punch. Keep the tip free of burrs and nicks and avoid twisting or prying motions that can cause breakage. Store the punch in a dry place to prevent corrosion and check the hardness and condition before precision work.