Enclosure accessory Rittal AS 4055.778 metallic — round punch die 18.0 mm

Rittal AS 4055.778 metallic — round punch die 18.0 mm is a precision tool insert for use with compatible enclosure punching tools and press systems. The die creates clean, circular 18.0 mm openings suitable for cable entries, conduit fittings and panel ports in sheet-metal enclosures and busbars. The female die is designed to be used together with the corresponding male die to produce accurate punched holes for professional electrical and control cabinet fabrication and retrofitting.

Advantages

This metallic round punch die delivers consistent 18.0 mm hole diameters with minimal burr and distortion when paired with the matching male die and a suitable press. Manufactured to meet industrial tolerances, it facilitates repeatable results for series production and maintenance work. Its robust construction supports frequent use in workshop and on-site environments, helping reduce secondary finishing and rework.

Suitable for

• Punching round cable entries and conduit openings in sheet-metal enclosures
• Creating 18.0 mm holes in busbars when used with the corresponding male die
• Panel cutouts for control cabinets, distribution boxes and electrical housings
• Retrofit and repair tasks where precise round holes are required

When it may not be suitable

This die is intended specifically for 18.0 mm round holes and requires the matching male die and an appropriate punching press or tool. It is not suitable for forming non-circular shapes or for use as a standalone cutting tool. Very thick materials or hardened steels outside the die and press capacity may exceed its intended use and produce poor results or damage the die.

Key specifications

• Hole diameter: 18.0 mm
• Material: metallic construction suitable for industrial punching
• Type: female (must be used with matching male die)
• Application: sheet-metal enclosures, busbars and panel openings

How to use

Install the female die into the compatible die holder of the punching tool or press, then fit the corresponding male die in the mating position. Position the sheet or busbar so the punch aligns with the required hole location. Operate the press according to the tool manufacturer's instructions to perform the punching action. After punching, inspect the hole and remove any light burr if necessary; avoid using the die on materials thicker than the press or die specification to prevent damage.

What to consider before purchase

• Verify compatibility with your punching tool or press and that you have the matching male die
• Confirm the 18.0 mm hole diameter matches the intended cable gland, conduit or fitting
• Check the maximum material thickness and material types recommended for the die and your press
• Assess expected production volume to determine if the die material and durability meet your needs

Usage recommendations

Use the die only with the corresponding male die and a press rated for the material and thickness being punched. Maintain the die by keeping mating surfaces clean, applying light lubrication if recommended by the press manufacturer, and inspecting regularly for wear to ensure consistent 18.0 mm holes and long service life.