CNC Routing ABS Plastic
ABS is a tough, stiff and easily machined plastic sheet — the material behind enclosures, equipment panels, trays and shop fixtures. It routes cleanly and takes paint and glue, and the sheet is made with a smooth or a textured (haircell) face.
Stocked thicknesses
What will you make?
- Equipment and electronics enclosures
- Control and instrument panels
- Trays, bins and drawer inserts
- Machine guards and covers
Why ABS for enclosures and panels
ABS resists impact, holds screws and threaded inserts well, and machines without the waxy feel of HDPE. Routed panels with cutouts for switches, displays, vents and connectors make clean equipment covers and enclosure faces, and ABS sheet is a common starting blank for vacuum forming.
Beyond color and face texture, ABS comes in specialty grades: flame-retardant sheet for some electrical enclosures, and UV-resistant or acrylic-capped sheet for parts that live outdoors. None is assumed for the stocked sheet, so ask the shop before you design a part that depends on one.
Common ABS parts and thickness
Thin ABS suits faceplates, liners, labels and vacuum-forming blanks; mid-weight sheet makes enclosure panels, trays and covers; the heavier sheets make jigs, fixtures and machine guards that take knocks. A forming blank is sized to the former’s frame plus a clamping margin, so get the blank size from your thermoformer before you draw it. Vehicle and trailer interiors — switch panels, dash inserts, storage trays and cabinet facings in vans, RVs and food trucks — are common ABS jobs too. The prototyping guide covers taking a part from first prototype to a short run.
For jigs and drill guides, ABS is stiffer than HDPE and holds its shape under a clamp: route the outline, pocket the nest a part sits in, and let the drill bank put the guide holes where the drawing has them.
Bonding and finishing
Unlike HDPE, ABS glues well: solvent cement welds ABS to ABS, and most structural adhesives grip it, so boxes and trays can be assembled from routed flat parts. It takes paint after a light scuff and a plastic primer. Edges from the CNC router can carry a light burr; a deburring tool or fine sandpaper finishes them.
Design glued boxes for the glue: a rabbet, or tabs in slots, gives solvent cement more surface and holds the panels square while it sets. Acetone and MEK soften ABS — that’s how solvent cement works — so keep those solvents, and cleaners that contain them, off finished faces. Cement sets quickly in dry desert heat, so dry-fit the box and have clamps ready before you start.
Engraving and pockets are cut into the face you confirm as the machined face, so match it to the side you want on show. A haircell face hides scuffs and fingerprints on equipment panels; a smooth face takes paint, labels and printed legends more evenly.
Designing ABS parts
Give inside corners a radius — the router leaves one anyway — and avoid sharp notches in parts that flex. ABS softens at temperatures metal shrugs off, so keep it away from heaters, hot lamps and engine heat, and don’t trap long panels between fixed points. For threaded fastening, design bosses or use inserts rather than relying on thin sheet.
Panel-mount parts — switches, displays, connectors, fans — list a cutout size on their data sheets. Draw the cutout to that size and check its corners: the bit leaves a 1/16″ radius, so a part with a square body needs dog-bone relief or a bezel that covers the corners, as the dog-bone guide explains. Round holes down to 3 mm (0.118″) are drilled, and a vent grille of many small slots adds cut length, so price it against a grid of drilled holes.
Pockets in ABS make component recesses, finger pulls and label wells, cut to the depth you set from the machined face. Engraved lines can mark switch legends and part numbers on a panel, and they take a color fill. Leave a solid floor under any pocket in a part that flexes, and go up a thickness where a long panel spans an opening.
Indoors or out?
Standard ABS isn’t made for constant sun: UV light fades and embrittles it over time, and the desert speeds that up. For parts that live outside, ask about a UV-resistant grade, paint the part, or look at HDPE or Dibond.
Heat is the other desert problem. A dark ABS part on a dashboard, in a closed trailer or inside a sunlit equipment cabinet in a Las Vegas summer can get hot enough to soften and warp, especially if it’s screwed down tight. Choose a light color, vent the enclosure, and slot the mounting holes on long panels so they can move.
What an ABS order includes
ABS parts ship as cut, flat, with machined edges and the sheet’s faces as supplied. Deburring, bonding and assembly, paint, threaded inserts, tapping and vacuum forming come after the parts leave the shop. For an enclosure built and assembled for you, or formed parts in quantity, describe the job in a custom fabrication inquiry.
Common uses
- Equipment and electronics enclosures
- Control and instrument panels
- Trays, bins and drawer inserts
- Machine guards and covers
- Thermoforming blanks
- Shop fixtures and templates
- Prototype panels and housings
Specs at a glance
| Available thicknesses | 1/8″–1″ in 1/8″ steps |
|---|---|
| Sheet sizes | 48″ × 96″ |
| Catalog names | ABS |
| Tolerance | ±0.005–0.010″ typical; machine positions to ±0.001″ |
| Grain | No face-grain constraint |
| Joining | Solvent cement and structural adhesives bond ABS |
| Outdoor use | Paint it, or ask the shop about a UV-resistant grade, for constant sun |
ABS cut to size — no CAD file needed
Need a plain shape? The quote’s shape builder makes rectangles, rounded rectangles, circles, rings, triangles, slotted plates and hole-grid panels and shelf-pin strips from the sizes you type, then prices them like any other part — material is billed by the whole sheets your parts nest on. Pick up at the shop in Las Vegas or get local delivery in the valley.
Build a shape in ABS →Frequently asked questions
Can ABS parts be glued together?
Yes. ABS solvent cement welds ABS to ABS, and most structural adhesives bond it, so routed flat parts can be assembled into boxes, trays and covers.
Is ABS good for outdoor parts?
Not without protection. Sunlight fades and embrittles standard ABS over time; paint it, ask the shop about a UV-resistant grade, or use HDPE or Dibond outdoors.
Can you route ABS blanks for vacuum forming?
Yes — routed ABS blanks are a common starting point for vacuum forming, though the forming itself isn’t part of a routing order. Route the blanks and holes here, then form them with your thermoformer. The forming buck itself can be 3D printed at large format, with an instant online quote.
Can you add countersinks or threads to ABS parts?
Not on the router. Pockets, slots and holes route cleanly in ABS, but countersinks and threads aren’t routed features — draw clearance or pilot holes, then countersink, tap or add inserts after cutting. A plastic part that needs machined threads or features on several faces is CNC milling work, quoted on request.
Can ABS housings with curved shapes be made?
Routed ABS makes flat panels that glue into boxes and trays. A housing with curves, bosses and clips in three dimensions is usually printed instead — FDM 3D printing in ABS or ASA for tough working parts, resin printing for a smooth appearance model — and both quote instantly online.
Smooth or haircell — which face do I get?
ABS sheet is made with smooth and textured (haircell) faces. Note the face you need when you order, and the shop confirms what the stocked sheet carries.
ABS or acrylic for an equipment panel?
ABS for panels that take knocks, flex or get screwed down hard — it bends before it cracks — and for a painted or textured face. Clear acrylic for windows, display covers and glossy faces, mounted with slotted holes so it isn’t stressed.
Can I use heat-set threaded inserts in routed ABS?
Yes — ABS takes heat-set and press-in inserts well. Draw each pilot hole at the size the insert’s maker lists; holes down to 3 mm (0.118″) are drilled, and smaller ones are drilled on request once the shop confirms the part. The inserts go in after cutting.
Can you copy an old ABS panel?
Yes, from a drawing of it. Trace or scan the old panel at full size, or measure it into CAD, and upload a DXF or SVG drawn 1:1; if a file reads at the wrong scale, “Size wrong?” on the part re-reads it in inches, in millimeters or at a width you type.
How do I build an ABS enclosure from flat panels?
Draw the sides, top and bottom with rabbets or tabs and slots, and put the connector, switch and vent openings and the screw holes on the same panels, so everything is cut in one order. Solvent-cement the box together, and hold a removable lid with screws into threaded inserts. A housing with curved walls is usually 3D printed instead.
Other materials we route
Related guides
ABS is cut on the shop’s CNC router — the CNC routing service page covers design rules, pricing and pickup or local delivery in Las Vegas.