Laser-Cut Panels and Faceplates

Front panels, rack panels and faceplates: what the part does

A panel is the face of a product: it carries the connectors, switches, displays and legends the user touches, so its cutouts have to land on the board behind it and its surface has to look finished. Instrument front panels, rack panels, faceplates for control pedestals and enclosure cover plates all follow the same recipe: a flat sheet with a cutout pattern, an optional etch layer for labels, hardware on the back, and a cosmetic finish on the front. No minimum: one piece to production runs of 10,000, quoted the same way each time.

Rack panels follow a published size. Wikipedia’s 19-inch rack article gives the EIA-310-D dimensions (source 1): an overall width of 19 in (482.60 mm), 17.75 in (450.85 mm) between the posts, a unit height of 1.75 in (44.45 mm), and mounting holes in repeating sets spaced 0.5, 0.625 and 0.625 in. The article adds that a panel is slightly shorter than its units, so a 1U panel is not a full 1.75 in tall. A 1U or 2U panel drawn to those numbers, with its own cutouts, is a normal job; the laser-cut parts hub explains how the cut, the hardware and the finish are quoted against one print. The electronics enclosure and product design pages cover the teams that send these jobs.

Connector cutouts and the etch layer on the DXF

Connector cutouts are drawn as closed profiles on the cut layer, one per connector: the D-shaped opening and two mounting holes of a D-sub, the rectangle of a USB or RJ45 jack, the round hole and locating notch of an XLR, the clipped rectangle of a rocker switch. Draw them at the size the connector datasheet calls for, not the connector body, and keep the cut layer to closed shapes only. A cutout that is small for the sheet thickness, or close to an edge, is flagged in the quote rather than cut blind.

Etched legends and logos on laser-cut parts are quoted with the part. Legends, labels and logos go on a separate etch layer in the same DXF, named so it cannot be mistaken for a cut. An etch marks the surface without going through it; the Wikipedia laser engraving article separates engraving, which removes material from the surface, from marking, which changes the surface color, and describes vector mode as following outlines, which suits fonts and logos, with raster mode for fills (source 2). Draw single-line text as lines and filled areas as closed outlines. A coating can hide a fine etch line, so a legend that has to show through a coat goes on the print as its own callout, and the quote says how it is handled. The file guide for laser cutting shows a good layer set, and the enclosure blanks page covers the box the panel bolts to.

Materials, thicknesses and finishes with a grain direction

Panels are cut from sheet, such as 5052-H32 or 6061-T6 aluminum, or 304 stainless for a bare stainless face; the laser-cut aluminum page covers the aluminum grades. Name the material and thickness on the print. Stainless sheet is described by finish designations under ASTM A480: the Wikipedia stainless steel article lists No. 1 as hot-rolled, annealed and passivated, 2B as cold-rolled with an added pass through polished rollers, and No. 4 as a brushed finish (source 4). A print that names a brushed #4 face should carry a grain direction arrow so every panel in the batch shares that grain; the laser-cut stainless page has the rest, including edge color. Other alloys and plastics quoted on request. Name the grade on the print. A clear acrylic window or guard for a panel is covered on laser-cut plastics.

A finish called out on the print is quoted with the part. Anodize on aluminum is written on the print as a type, class and color: under MIL-A-8625, Class 1 is non-dyed and Class 2 is dyed after anodizing and before sealing (source 5). Type II coatings are 0.00007 in to 0.001 in thick, and the oxide grows half into the surface and half out of it (source 6), so an anodized panel gains very little on each face. Powder builds thicker than a liquid coat (source 3): one Products Finishing answer gives a typical film of around 2 to 3 mils (source 7), so the print says whether tapped threads are masked or chased after coating. The finishing page lists what each metal can take. Brass nameplates and escutcheon plates are covered on laser-cut brass and copper.

Tolerances that matter on a panel

On a panel the numbers that matter are cutout position relative to the mounting holes, cutout size, and flatness of the face. The profile and every cutout in the flat carry the laser’s profile tolerance, and the quote states the tolerance used. Where a display window or a bezel opening must center on a board, the print should reference the cutout to the mounting holes, not to the outside edge, and the quote says whether it can be held.

Flatness is the number nobody draws and everybody notices. Laser cutting inevitably leaves residual stress at the cut, and a 2014 study names warping as a problem when a laser-cut sheet is bent afterward (source 8). A flatness callout on a panel is quoted per job against the thickness and cutout pattern, and the quote says plainly when a thin sheet with a large window cannot hold what the print asks and a thicker sheet or a stiffening flange would. A flange is a bend, and the bent brackets page covers bend callouts: the inside radius is quoted as drawn, with a note if it won’t form. If a part doesn’t match the print, it’s remade or credited.

PEM standoffs, what to send, and when a billet bezel is the better part

Boards mount to the back of a panel on self-clinching standoffs, and a PEM standoff or nut is called out on the print by part number and location so the right hole is cut for it. Hardware is installed per the print. Standoffs sit on the back face, so mark the cosmetic side and the hardware side on the drawing and keep the pattern clear of connector flanges; the hardware insertion page covers sheet thickness and hardness limits. Tapped holes in a 6061 panel are an alternative where the sheet is thick enough to hold a thread; the tapped and machined as one order guide explains the callouts.

What to send: a DXF with cut and etch on separate named layers, plus a PDF print with grade and temper, decimal thickness, quantity, finish and color, grain direction arrow, hardware part numbers, the cosmetic face, and the revision. Without a drawing, a dimensioned sketch, a new sample panel or photos with a ruler are enough to start; the CAD work is then quoted as its own line, and the quote lists anything missing. A fully dimensioned 2D PDF is quoted without a CAD line. A faceplate that needs a machined pocket or a raised rim is a billet bezel, cut from plate rather than sheet, and is quoted from that page. Upload at the quote form: any file type, DXF or STEP plus PDF ideal. Lead time: quoted per job, rush available.

Sources

All accessed 4 October 2026. Where a figure here differs from your print, the print governs.

1. Wikipedia, "19-inch rack": en.wikipedia.org/wiki/19-inch_rack (EIA-310-D, Cabinets, Racks, Panels, and Associated Equipment, September 1992; 19 in (482.60 mm) panel width; a gap of 17.75 in (450.85 mm) between posts; 1.75 in (44.45 mm) rack unit; hole spacing of 0.5, 0.625 and 0.625 in; a panel is slightly smaller than its units, a 1U computer being 1.719 in tall).

2. Wikipedia, "Laser engraving": en.wikipedia.org/wiki/Laser_engraving (engraving physically removes material from the surface, while marking is a color change through chemical alteration, charring, foaming, melting or ablation; vector mode follows outlines like a plotter and suits fonts and logos; raster mode suits fills).

3. Wikipedia, "Powder coating": en.wikipedia.org/wiki/Powder_coating (powder coatings can produce much thicker coatings than conventional liquid coatings without running or sagging).

4. Wikipedia, "Stainless steel": en.wikipedia.org/wiki/Stainless_steel (finish designations by ASTM A480/A480M-18: No. 1 hot-rolled, annealed and passivated; 2B the cold-rolled finish with an additional pass through highly polished rollers; No. 4 a brushed finish).

5. Products Finishing, Larry Chesterfield, "What is the Correct Anodizing Specification?", 1 May 2010: pfonline.com/articles/what-is-the-correct-anodizing-specification (under MIL-A-8625, Class 1 means non-dyed and Class 2 means dyed after anodizing and before sealing; the article does not name the author’s employer).

6. Wikipedia, "Anodizing": en.wikipedia.org/wiki/Anodizing (Type II coatings of 1.8 μm to 25 μm, 0.00007 in to 0.001 in; oxide grown down into the surface and out from the surface by equal amounts; Type II coatings accept dyes).

7. Products Finishing, Rodger Talbert, "Proper Coating Thickness", 1 November 2013: pfonline.com/articles/proper-coating-thickness (typical powder film thickness around 2 to 3 mils; byline names no employer).

8. Yingjun Jin, Takahiro Shibata, Atsushi Maeda and Takashi Kuboki, "Method of Reducing Residual Stress Generated by Laser Cutting by Light Indentation of Sheet Metal Edge", Journal of the Japan Society for Technology of Plasticity, 2014: jstage.jst.go.jp/article/sosei/55/646/55_1003/_article (residual stresses are inevitably generated by laser cutting; warping is named as a key problem when the cut sheet is later bent).