ABS CNC Machining Services
ABS is a low-cost, dimensionally stable amorphous thermoplastic with an excellent surface for painting and plating, used for enclosures, prototypes and consumer hardware.
Natural, black and white ABS stock
Tolerances to +/-0.10 mm on plastic parts
Plating, painting and adhesive bonding available
What Is ABS?
Why ABS is the default engineering plastic for consumer products, and where its limits push you up to PC or down to HIPS.
ABS is an amorphous thermoplastic blend of acrylonitrile, butadiene and styrene. The butadiene rubber phase absorbs impact without cracking; the styrene gives a hard, glossy surface that paints and plates cleanly; the acrylonitrile contributes chemical and heat resistance. It costs roughly one third of polycarbonate and is far easier to finish.
What ABS does well
ABS holds dimension under load and tolerates 80 to 95 C continuous service. It machines to a clean edge with sharp tooling, takes a 0.8 um surface finish, and bonds with acetone, methyl ethyl ketone and a wide range of structural adhesives. Plated ABS is the standard substrate for automotive trim, nameplates and consumer hardware.
Design limits
ABS will not survive direct sunlight without a UV-stabilised grade or paint, and it is brittle in cold service below about -20 C. Where impact and clarity matter more than cost, polycarbonate wins. Where cost dominates and impact strength can be lower, polystyrene and HIPS are alternatives.
Related capabilities: CNC Machining, CNC Milling, CNC Turning, 5-Axis Machining. Dimensional limits, thread rules and surface roughness grades are listed on the tolerances and specifications page, and volume-based routing is covered under production solutions.
ABS Mechanical Properties
Typical values at room temperature for the condition most often machined. Use them for material screening, then confirm against the mill certificate for the exact heat and product form.
| Property | Typical value |
|---|---|
| Density | 1.04 g/cm3 |
| Ultimate tensile strength | about 40 MPa |
| Tensile yield strength | about 30 MPa |
| Elongation at break | 10 to 30 percent depending on grade |
| Elastic modulus | 2.3 GPa |
| Continuous service temperature | 80 to 95 C |
| Glass transition temperature | about 105 C |
| Water absorption | about 0.7 percent at 24 hours |
| Flammability | HB without additives, V-0 with flame-retardant grade |
| Surface resistivity | about 1e15 ohm.m |
Typical room-temperature values compiled from public ASM, MatWeb and mill datasheets. Actual values vary with temper, section thickness and product form; request the EN 10204 3.1 certificate for critical applications.
Machining Characteristics of ABS
How the material behaves in the cut, and what that means for tooling, fixtures, cycle time and achievable tolerance.
Sharp polished tools
Dull edges melt the butadiene phase and cause the surface to smear and shine during machining.
Coolant use
Air blast or light mist; aqueous coolants do not interact strongly with ABS but prolonged soaking is unnecessary.
Chip evacuation
ABS chips are static-prone and cling; use compressed air to clear pockets before drilling or tapping.
Tight tolerance
Achievable to about +/-0.10 mm on machined features on stable stock. Tighter tolerances need careful stress-relief planning.
Surface preparation for plating
Direct metallising needs an etched surface; ABS grades sold as platable are formulated to accept electroless plating.
Glue and paint readiness
Paint, plate, glue or print without surface treatment on most grades; wipe with isopropyl alcohol before applying finishes.
Design and Machining Checklist
Practical rules that reduce cost and scrap on ABS parts. Share them with your design team before the drawing is frozen.
- Use 0.8 mm minimum wall thickness and 1.5 mm where the wall is supported over 25 mm.
- Specify generous internal radii of 0.5 mm to avoid brittle fracture in stress-bearing parts.
- Standard threads in ABS strip easily; use metal inserts for parts that are assembled repeatedly.
- Use UV-stabilised grade or paint the surface for any part that sees direct sunlight.
- Plate ABS components for hard, reflective surfaces that mimic metal at a fraction of the cost.
- Consider HIPS or polypropylene when impact resistance is not needed and price is the priority.
Surface Finishing Options
Finishes are selected for corrosion resistance, wear, appearance, electrical behaviour or cleanliness. Specify only what the function needs.
As-Machined
Ra 0.8 to 1.6 um with a clean edge, ready for painting or bonding.
Bead Blasting
Fine bead blast provides a uniform matte surface that hides light tool marks.
Painting
ABS is the benchmark plastic for paint adhesion; two-part polyurethane and acrylic enamels give durable finishes.
Electroless Plating
ABS is the industry-standard substrate for electroless copper/nickel/chrome plating, producing hard, reflective metal finishes.
Adhesive Bonding
ABS bonds with solvent cements (acetone, MEK) and with cyanoacrylate, epoxy and structural acrylic adhesives.
Steam and Solvent Welding
Solvent welding with MEK produces strong, irreversible joints on ABS, used widely in case and enclosure assembly.
Typical Applications
Where ABS is most often specified, and why it wins against the alternatives.
Enclosures and housings
Electronics enclosures, instrument cases, control panels and consumer hardware housings.
Automotive interior trim
Plated and painted nameplates, switch bezels, knobs and HVAC trim components.
Consumer products
Toys, appliance bodies, vacuum cleaner shells and computer accessories where colour matching and impact resistance are both needed.
Prototypes and low-volume production
Low-cost functional prototypes, bridge production and pilot runs before injection moulding is justified.
Point-of-sale and signage
Display stands, retail fixtures and large-format signs that are painted or decorated.
Medical device housings
External housings for diagnostic instruments where repeat sterilisation and chemical resistance are needed.
Need ABS parts quoted?
Upload your CAD files for a detailed quote on ABS components, including material certification, finishing, inspection and worldwide delivery.