ABS CNC Machining

DEK's ABS CNC machining service produces enclosures, bezels, brackets, fixtures and appearance prototypes from natural, black and flame-retardant ABS. We hold ±0.01 mm on critical features, with simple parts in as little as 1 day and no MOQ.

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±0.01mm
Critical Features
1 Day
Simple Part Lead Time
No MOQ
1 to 10,000+ Pieces

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ISO 9001:2015 Certified AS9100D and ISO 13485 certified

Why Choose ABS CNC Machining at DEK?

ABS is the material product teams reach for when a part must look and feel like the production version: it machines cleanly, takes paint, plating and texture well, and costs a fraction of engineering polymers. It is one of the commodity polymers covered by our plastic CNC machining services.

We cut ABS on the same 3-, 4- and 5-axis mills that run your aluminum and steel parts, so a prototype and its metal chassis ship in one order with fit checked. ABS models are a standard output of our rapid prototyping services; see all polymers under CNC machining plastics.

Certified to ISO 9001:2015, ISO 13485, AS9100D
Engineer-reviewed quote within 6 hours
IQC, IPQC, FAI and OQC with CMM reports
Prototypes and low-volume parts since 2002

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ABS Grades and Blends We Machine

From general-purpose sheet to plating-grade formulations, each ABS grade below is chosen for the job the finished part has to do.

Natural and Black ABS
General-purpose sheet and rod
Extruded sheet and rod for enclosures and brackets; black hides tool marks on unpainted parts, natural (ivory) suits painted models.
Machining-grade ABS
Up to 100 mm thick
Low-stress extruded plate up to 100 mm thick, chosen for machined blocks and thick enclosures that need stable stock.
Flame-Retardant ABS
UL 94 V-0
Specified for electrical and battery enclosures where the housing must carry a UL 94 V-0 flammability rating.
High-Impact ABS
Drop-tested housings
The choice for handled equipment and housings that go through drop testing before release.
PC/ABS Blend
Up to 110 °C
Higher heat resistance and impact strength than standard ABS, used for automotive interior and power-tool prototypes.
Plating-Grade ABS
Butadiene-rich formulation
Select it when appearance parts need chrome or nickel electroplating rather than paint, for decorative consumer and automotive parts.

CNC milling machine cutting black ABS plastic block

±0.01 mm
Features under 50 mm
±0.05 mm
Large thin enclosures
Ra 0.8–1.6
As-machined finish, µm
3–5 days
Prototype lead time

ABS Machining Capabilities at DEK

ABS is soft (Rockwell R105), so we run high spindle speeds with sharp, polished-flute tooling and light clamping to cut it rather than push it.

1

CNC Milling

3-, 4- and 5-axis CNC milling for enclosures, housings, panels, snap-fit features and living hinges in ABS sheet and block.
2

CNC Turning

CNC turning for knobs, spacers, bobbins and rollers, cut from ABS rod with sharp tools that prevent smearing.
3

Tapping & Insert Bores

Drilling and tapping, plus heat-set insert bores sized for the brass inserts used in production parts, so hardware transfers straight across.
4

Engraving & Text Milling

Engraving and text milling for legends and logos; supporting work includes solvent bonding of multi-part enclosures and EMI shielding paint.

Design & Machining Tips for ABS

What our engineers check on every ABS drawing to keep thin enclosures flat, fits correct and cost under control.

1

Annealing Thin Sheet Parts

Extruded ABS sheet carries directional stress that warps thin enclosures after one face is pocketed. We anneal blanks at 70–80 °C for walls under 2.5 mm or large flat covers, and rough both sides first.
2

Thermal Expansion

At 80 µm/m·K, ABS expands 3.5 times more than aluminum. A 300 mm cover grows 0.5 mm more than its aluminum chassis over a 20 °C swing; slot the mounting holes.
3

Tolerancing Prototypes

We hold ±0.01 mm on small rigid features and ±0.05 mm on large thin parts. When the prototype stands in for a production plastic part, tolerance it to that drawing (typically ±0.1–0.2 mm) to cut cost.
4

Sharp Corners and Edges

Machined internal corners carry the cutter radius, so call out where a 0.5 mm radius is acceptable. External edges get a 0.3 mm chamfer to resist chipping under paint.
5

Thin Walls

Design 1.0 mm minimum and 1.5 mm preferred on walls over 50 mm long. We machine 0.8 mm with a backing fixture, but it will not survive handling on an appearance model.
6

Snap Fits and Inserts

Machined ABS snaps survive a few cycles only. Size heat-set insert bores to match the production part so the hardware transfers straight to production.

ABS Prototype Machining vs PC, Nylon, Aluminum

Machine ABS for 1–500 pieces with production-grade properties and ±0.05 mm or better; 3D printing suits complex internal geometry under 10 pieces.

Criteria	This MaterialABS	Polycarbonate	Nylon	Aluminum
Use for	Opaque parts	Clear parts	Gears, bushings	Metal parts
Max temp	75 °C	120 °C	–	–
Toughness	Lower	2–3× tougher	–	–
Wear	Lower	–	Better	–
Painting	Better	–	–	–
Cost	Cheaper	Higher	–	–
Clarity	Opaque	Transparent	–	–

Industries Using ABS CNC Machining

ABS parts move from appearance models to low-volume production across consumer, electronics, automotive and robotics programs.

Finishing Options for Machined ABS Parts

Each finish is applied to ABS after CNC machining, ready for design review or low-volume sale. Anodizing does not apply to ABS.

ABS Finishes

Sanding and Priming
Painting
Electroplating
Bead Blasting
Laser Marking

Need a finish not listed here? Ask our engineers.

ABS CNC Machining FAQ

Answers to the questions engineers ask before ordering machined ABS prototypes.

Is ABS good for CNC machining?

Yes. ABS is among the easiest plastics to machine: it cuts cleanly with sharp tools, holds ±0.01 mm on rigid features and finishes well. The main care points are avoiding melting at low speed and annealing thin sheet parts so they do not warp after pocketing.

Should I machine or 3D print an ABS prototype?

Machine it when you need production material properties, a paintable Class A surface or accuracy better than ±0.1 mm. Print it for complex internal geometry or single pieces where finish and strength are secondary.

Can machined ABS parts be painted or plated?

Yes. ABS paints without adhesion promoter after sanding and priming, and plating-grade ABS accepts chrome, nickel and copper. Both are common on appearance models and low-volume consumer products.

What tolerance do you hold on abs plastic machining?

±0.01 mm on small rigid features and ±0.05 mm on large thin enclosures. For prototypes that represent production plastic parts, we can also machine to that drawing's ±0.1–0.2 mm to reduce cost.