CNC Punched Sheet Metal Panels

Precision CNC punched sheet metal panels manufactured to your drawing — sub-panels, mounting plates, ventilation grilles, instrument face panels, gland entry plates, perforated panels, chassis panels, and blanking plates across steel, aluminium, stainless, and pre-coated sheet. Hole positions held to ±0.1 mm, burr height controlled to ≤0.1 mm, and panel flatness maintained after punching. Protective film applied before dispatch as standard. Supplied as precision flat components ready for integration into your enclosure, product, or assembly without rework at your line.

Material

IS 513 / EN 10130 CR4; IS 277 / EN 10143; ASTM A240 Grade 304; ASTM A240 Grade 316L; 5052-H32; 6061-T6; Pre-coated CRCA

Sheet Thickness Range

0.5 mm – 6.0 mm; specific maximum punch-able thickness per hole diameter confirmed at DFM review

Hole Position Tolerance

±0.1 mm true position from drawing datum; CNC programme locked to first article;

Hole Diameter Tolerance

+0.1 / −0 mm on punched hole diameter; tighter tolerances achievable by reaming post-punch where specified

Minimum Hole Diameter

Equal to sheet thickness minimum; absolute minimum 0.8 mm for 0.8 mm sheet;

*CNC punched panel programmes have short first-run lead times because there is no tooling build or fixture fabrication — only programme development and first article verification.

Product Description

Frigate’s CNC punch programme is developed from your drawing and locked to the approved first article. The programme runs unchanged across every subsequent production batch — hole positions repeat to ±0.1 mm true position without re-setup between runs. Material incoming thickness is verified against the drawing specification before the programme runs — sheet thickness variation changes punch clearance and directly affects burr height, so incoming material is not assumed to be within tolerance from the mill certificate alone. Burr height is measured on the first article and AQL-sampled in production; panels exceeding the specified burr height are deburred before dispatch.

Minimum Hole-to-Edge Distance

≥1.5× material thickness standard; ≥1.0× achievable with tooling optimisation — confirmed at DFM review per material grade and thickness

Maximum Panel Size

2,500 × 1,250 mm; panels larger than this range manufactured in sections with matched hole patterns at join positions

Countersinking

90° or 120° countersink; diameter and depth per drawing; countersink concentricity ±0.2 mm from hole centre

Tapping

M3–M12 tapped holes in punched sheet; thread form verified by go/no-go gauge;

Panel Flatness

≤0.5 mm/m after punching on standard panels; ≤1.0 mm/m on high-density perforated panels (open area >40%) before levelling pass;

Open Area Range

20%–65% open area achievable depending on pattern type, hole diameter, and pitch;

Protective Film

PE self-adhesive film applied to both faces of all panels before dispatch; peel force 50–150 g/25 mm;

Powder Coat Option

RAL polyester powder coat 60–80 µm DFT applied post-punch; spectrophotometer colour verification (ΔE ≤1.5) per lot;

Anodise Option (Aluminium)

Type II sulphuric anodise (10–25 µm) or Type III hard anodise (25–50 µm) for aluminium panels; applied post-punch; protective film applied post-anodise

Environmental Compliance

RoHS 3; REACH SVHC <0.1% w/w; all base materials and surface treatment chemicals within compliance scope

Technical Advantages

Panel flatness after high-density punching — particularly on thin sheet with closely-spaced holes — is controlled through punch sequence programming rather than corrected after the fact. The punch sequence is developed to balance the stress distribution across the panel during the punching cycle.

For perforated panels with open areas above 40%, a levelling pass is included in the programme before the panel is released from the machine. Protective film is applied to both faces of all panels before dispatch as standard — panels arrive at your assembly line with cosmetic surfaces protected, not scratched from transit stacking. =

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Industry Application

Electrical Enclosure & Cabinet Manufacture

Mounting plates, sub-panels, gland entry plates, blanking plates, and ventilation grilles for electrical enclosure and cabinet production programmes. Hole positions ±0.1 mm for consistent component population without adjustment at assembly.

Electronic Equipment Chassis

PCB mounting plates, chassis panels, front face panels, and rack-mount blanking panels for electronic equipment manufacture. Precision burr height ≤0.05 mm where burr-free edges are a safety or assembly requirement. Protective film on all faces as standard.

Instrument & Control Panels

Instrument face panels with display cutouts, switch apertures, and legend plate positions held to the instrument manufacturer’s panel cutout specification. Cosmetic-grade surface on instrument-facing side; no punch marks visible on finished panel face.

HVAC & Ventilation Equipment

Perforated ventilation panels and louvre grilles for HVAC unit housings, fan guard panels, and air distribution equipment. Open area percentage and perforation pattern confirmed against your airflow specification at DFM review.

Acoustic & EMC Panels

Perforated facing panels for acoustic lining systems and EMC shielding applications where a specific open area percentage and pattern regularity are required. Flatness maintained through sequence programming — critical for acoustic lining systems where panel contact with the absorber layer must be consistent.

Machine & Industrial Equipment

Structural chassis panels, access cover plates, cable entry panels, and guard infill panels for machine tool and industrial equipment manufacture. High-volume production supply with retained programmes and consistent batch quality for ongoing manufacturing programmes.

Frigate Approved Quality Management System

At Frigate, quality is built into every stage of manufacturing. Our approved Quality Management System ensures that every material component.

Incoming Material Checking

Before production begins, all incoming materials are checked against specifications, drawings, and supplier documents.

In-Process Inspection

Quality is monitored during manufacturing to prevent defects and maintain process consistency.

Final Dimensional Checking

Finished parts are inspected before dispatch to confirm compliance with customer drawings and tolerances.

Packaging Control

Finished components are packed safely to prevent damage during handling and transportation.

Incoming Material Checking

In-Process Inspection

Final Dimensional Checking

Packaging Control

Quality Document

To help buyers evaluate our quality systems, we provide sample documents that reflect our inspection and reporting standards.

How We Delivered

Complex geometries engineered solutions that move businesses forward.

Solar Inverter Enclosure

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Defence-Grade Cable Supply

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Flange Assembly for Pump

Faster Production

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Having Doubts? Our FAQ

Our panels arrive from our current supplier with burrs that catch on components during assembly. What does Frigate do differently?

Burr height on punched panels is controlled through punch-to-die clearance matched to the exact material grade and thickness of each lot — not assumed from a nominal specification. Frigate measures incoming sheet thickness on every material lot before the programme runs, because thickness variation changes the effective clearance and directly affects burr height. Burr height is measured at first article and AQL-sampled in production, with panels exceeding specification deburred before dispatch rather than released and flagged on delivery.

We need instrument cutouts held to the instrument manufacturer's dimensional specification. How tight can Frigate hold aperture dimensions?

Aperture dimensions are held to ±0.1 mm on the critical dimensions that govern instrument fit — the same tolerance as hole position. Submit the instrument manufacturer’s panel cutout drawing alongside your face panel drawing and Frigate’s DFM review will confirm which dimensions are critical, whether the specified aperture is achievable by punching alone or requires a finishing operation, and what the first article verification will cover.

We're supplying pre-coated panels but the punch is damaging the coating at cut edges. Can Frigate punch pre-coated sheet without edge damage?

Punching pre-coated sheet without edge delamination requires correct clearance, sharp tooling, and a programme that minimises slug pull-back — all three are confirmed at DFM review for pre-coated material before the first article run. The acceptable cut-edge appearance on pre-coated sheet is agreed at first article sign-off so the acceptance criterion is defined before production begins, not disputed at incoming inspection.

We have multiple panel part numbers across one product. Can all be supplied under one programme?

All panel part numbers are managed under a single programme — one purchase order, one delivery schedule, one documentation package across all part numbers per shipment. Each part number has its own locked programme file and first article. Re-orders on all part numbers in the programme are released simultaneously against a single call-off, which simplifies your purchasing process for ongoing production supply.

Our high-density perforated panels arrive warped and we can't use them. What causes that and can Frigate control it?

Warping on high-density perforated panels is caused by accumulated stress from the punching cycle — each punch stroke introduces a small residual stress, and at high perforation density those stresses sum to visible panel distortion. Frigate addresses it at programme design stage through punch sequence optimisation that balances the stress distribution across the panel, combined with a levelling pass at the end of the programme before the panel is released from the machine. The flatness result is verified at first article and sampled in production — panels outside the ≤0.5 mm/m specification are not dispatched.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Components Built for Critical Performance

Engineered Products for Critical Applications

CNC Punched Sheet Metal Panels

Product Description

Minimum Hole-to-Edge Distance

Maximum Panel Size

Countersinking

Tapping

Panel Flatness

Open Area Range

Protective Film

Powder Coat Option

Anodise Option (Aluminium)

Environmental Compliance

Technical Advantages

Let's Get Started

Industry Application

Frigate Approved Quality Management System

Quality Document

How We Delivered

Having Doubts? Our FAQ

We'd love to Manufacture for you!

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

Get Your Quote Now

CNC Punched Sheet Metal Panels

Get Latest Price

CNC Punched Sheet Metal Panels

Get Latest Price