Enclosure Accessory Rittal AS 4055.780 metallic, round 21.5 mm matrix

Rittal AS 4055.780 metallic, round 21.5 mm matrix is a purpose-built enclosure accessory for creating precise round openings in control cabinets, electrical panels and industrial housings. Supplied as a 21.5 mm round female die, it is intended to be used together with the corresponding male die to form clean, repeatable holes suitable for cable entry, mounting controls or installing indicators. The component is manufactured in metal for durability and workshop or field use.

Advantages

The metallic construction ensures long service life and resistance to deformation during repeated punching operations. As a dedicated 21.5 mm round matrize, it delivers consistent hole diameter and edge quality when paired with the matching male die, reducing the need for additional finishing. Its compact form factor keeps handling straightforward and integrates into standard die sets used for busbar and panel fabrication.

Suitable for

• Punching round holes in control cabinet doors and panels
• Creating cable entry points and conduit access
• Fitting small controls, indicator lights and switches
• Busbar hole punching when used with the appropriate male die

When it may not be suitable

This female die is designed specifically to be used in combination with the corresponding male die; it cannot form proper holes alone. It is not intended for creating non-round or oversized openings, and it may be unsuitable for very thick or hardened materials beyond the rated capacity of the matched die set. For applications requiring threaded inserts or non-punched fits, alternative machining methods should be considered.

Key specifications

• Shape and type: round female die (matrize)
• Nominal hole diameter: 21.5 mm
• Material: metallic construction for durability
• Typical application: panel and busbar punching when paired with male die
• Form factor: compact, workshop/field compatible

How to use

Install the female die into the corresponding die holder following the press or punching tool manufacturer’s instructions. Fit the matched male die opposite the female die to complete the punch assembly. Position the panel or busbar material between the dies, align to the desired hole location and perform the punching operation with the appropriate press or manual punch tool. After punching, inspect the hole edges and remove any small burrs if necessary. Follow safety procedures and tooling guidelines for material thickness and maximum cycle load.

What to consider before purchase

• Ensure you obtain the matching male die compatible with this female 21.5 mm matrize
• Verify the die set is suitable for the material type and thickness you plan to punch
• Confirm compatibility with your press or punching tool and holder system
• Assess whether a punched hole is acceptable for your application or if alternative finishing is required

Usage recommendations

Use the Rittal 21.5 mm round female die only as part of a matched die pair and follow the tool manufacturer's limits for material thickness. Regularly inspect dies for wear, keep mating surfaces clean, and deburr punched edges for best functional results when installing controls, indicators or busbar connections.