ABS CNC Machining

When you need custom ABS parts, you expect them to match your drawing, hold critical dimensions and be ready for testing and use. VMT provides custom CNC machining ABS parts, from single prototypes to production runs.

We control critical dimensions such as hole positions, mounting surfaces and mating features to ±0.05 mm, and plan material removal to limit distortion during machining. Parts are inspected against your drawing before they ship, so they arrive ready for the next stage of your project.

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What is ABS?

ABS, or acrylonitrile butadiene styrene, is an engineering thermoplastic known for impact toughness, stiffness and good dimensional stability. It is supplied as extruded sheet and rod and machines well, so ABS (acrylonitrile) CNC machining is a common route for housings, brackets, fixtures and functional prototypes.

ABS Material Properties at a Glance

The values below are typical for machine grade ABS stock and help engineers plan ABS plastic CNC machining, from stiffness and heat limits to dimensional stability. Actual values vary by grade and supplier.

Property	Typical value
Density	1.03 g/cm³
Tensile strength at yield	28 to 39 MPa
Flexural modulus	1.9 to 2.2 GPa
Rockwell hardness	R102 to R105
Notched Izod impact strength at 23 °C	340 to 430 J/m
Heat deflection temperature at 1.82 MPa	81 °C
Coefficient of linear thermal expansion	about 100 µm/m·°C
Water absorption after 24 hours	0.3%

Our CNC Machining ABS Capabilities

VMT machines ABS parts on 3-axis, 4-axis and 5-axis CNC equipment, and our ABS CNC machining service covers turning, milling, drilling and pocket work on the same material.

5-axis CNC Machining

Reaches angled and multi-face features in fewer setups, helping hold feature positions on ABS housings. Our ABS 5 axis CNC machining services cover complex shapes.

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CNC Milling

Cuts flat faces, slots and profiles on ABS housings, brackets and covers. Our CNC milling ABS plastic covers 3-axis and 4-axis work for prototypes and production.

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CNC Turning

Produces round ABS parts such as bushings, spacers and shafts with concentric features and smooth surfaces, from single prototypes to production runs.

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Drilling and Tapping

Adds holes, threads and counterbores to ABS housings and brackets, with thread milling available where a tapped thread is too delicate.

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Pocket Milling

Removes material from enclosure interiors to form cavities, ribs and mounting pockets while keeping wall thickness consistent.

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Our ABS Finishing Services

ABS responds to finishing differently from metal, so choose the process by what the part must do. Solvent-based CNC ABS plastic finishing such as vapor polishing gives a glossy surface, but it can soften edges and shift small features, so keep it away from mating faces with tight tolerances. Painting needs a primer suited to plastics for good adhesion, and sanding should be light, since heat from aggressive sanding can smear the surface. Microscope deburring removes burrs without changing the dimensions of the part.

A handheld industrial control module needed a black housing that could protect its PCB and sensors from daily drops and field impacts. The housing combines deep pockets, thin internal ribs and features on both faces that must line up with each other. Getting those features right depended on two things: keeping both faces referenced to the same datum, and controlling distortion in the thin walls.

Keeping Both Faces Aligned

Screw counterbores on the front, side cable openings and PCB bosses on the back all have to line up. Every time a part is flipped, a small location error creeps in, and across two faces that error shows up as screw holes or ports out of position. We cut locating holes into the outer flange so every flip returns to the same points. The result is two-side location held within ±0.05 mm, which lets screws sit flush and cable ports align.

Controlling Distortion in Thin Ribs

ABS is soft and has low stiffness. When heavy cutting removes material from one side first, the internal stress releases unevenly and pulls thin ribs out of shape. We remove most of the material from both faces first, so stress releases evenly from both sides. Finishing comes afterward, in light passes that take thin layers from the ribs and walls. Clamping sits on the thicker perimeter and bosses, not on the ribs, so the clamp does not press them out of shape.

Assembly Result

After machining, the ribs and thin walls showed no cracking or warping. In assembly testing, the housing fitted the PCB and sensors, and the screws seated flush in the counterbores.

Supporting Details

Black ABS was chosen for its impact toughness and light weight, and it is lighter than aluminum. Edges are deburred by hand and visible tool marks are lightly sanded. A matte paint finish is available on request, and heat-set M3 brass inserts can be added where screws are assembled repeatedly.

VMT Case Study: Black ABS Control Box, CNC Machined in Small Batches

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DFM Tips for Your Custom ABS Parts

The guidelines below reflect how ABS behaves under heat, load and moisture, and they help your part machine reliably at a lower cost. Treat the values as starting points for CNC machining for ABS plastic parts, and send your drawing to our engineers for a DFM review.

1.Wall Thickness and Ribs▼Read moreShow less

Walls at least 1.5 mm thick suit most ABS parts, because thinner walls flex under cutting force and warp with heat. Walls taller than four times their thickness need ribs for support. Walls at 1.0 mm work only when they are short or supported by curves.

2.Generous Internal Radii▼Read moreShow less

Make the internal radius at least one third of the pocket depth, so a standard tool can reach the corner without deflecting. For pockets under 10 mm deep, the tool radius alone is usually enough. Deeper pockets need the larger radius.

3.Tolerances Only Where Needed▼Read moreShow less

ABS expands about 0.01 mm per 100 mm for each degree Celsius, so a typical tolerance of ±0.1 mm suits most dimensions. Use ±0.02 mm only on mating features over a short span with a controlled temperature. Looser tolerances elsewhere keep part cost down.

4.Features on Common Planes▼Read moreShow less

Place features on common planes so the part needs fewer setups. Keep pocket depth within four times the pocket width, since ABS is less stiff than metal and a long tool reach deflects more. Deeper pockets need extended tooling and cost more.

5.Standard Holes and Threads▼Read moreShow less

Keep blind holes within four times the drill diameter, so chips clear and heat does not build up and gum the ABS. Use at least 1.5 times the nominal diameter for thread engagement under light loads, and three times for parts assembled repeatedly. Standard tap sizes avoid extra tooling.

6.Clearance for Heat and Moisture▼Read moreShow less

ABS expands with heat and absorbs about 0.3% moisture over 24 hours, so mating features need clearance rather than press fits. Press fits suit one-time assemblies at stable temperature. Parts used in hot or humid conditions need more clearance.

Why Choose VMT

16 Years as a Factory

As a factory with 16 years of experience in ABS CNC machining, we run more than 100 CNC machines for milling and turning.

Free DFM Review from the Shop Floor

Send your drawing and our engineers will check it for manufacturability before machining starts. The feedback comes from our own shop floor, so issues are caught early.

No MOQ and Quotes Within 24 Hours

Single prototypes are welcome, and we return quotes within 24 hours.

ISO 9001:2015 Certified Factory

Our factory is ISO 9001:2015 certified, with a production yield rate of 99.8%.

What is the Application of ABS CNC Parts?

ABS CNC parts are used across many industries, and the examples below show where they are common.

Automotive: ABS dashboard prototype, ABS sensor bracket, ABS trim bezel, ABS door panel cover
Consumer Electronics: ABS remote control housing, ABS keyboard case, ABS power tool housing, ABS appliance casing
Industrial Components: custom CNC machining ABS parts, ABS electrical enclosure, ABS junction box, ABS jig and fixture, ABS machine guard
Medical Devices: CNC ABS diagnostic device housing, ABS lab equipment housing, ABS instrument panel, ABS handheld device enclosure
Telecommunications Equipment: ABS router housing, ABS network device enclosure, ABS antenna housing, ABS connector cover

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Our Other Plastic Machining Services

PC

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POM

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Nylon

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PTFE

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People Also Ask

Can ABS Plastic be Machined?

Yes, ABS plastic can be easily machined using various methods, especially through ABS CNC machining. Many CNC machining factories and manufacturers specialize in CNC machining ABS parts because ABS is known for its good machinability, making it ideal for producing precise and detailed components.

Is it Expensive to Machine ABS?

Machining ABS is generally cost-effective compared to many other plastics and metals. The cost of CNC machining ABS parts depends on factors like part complexity, quantity, and finishing requirements. Working with a reliable ABS CNC machining supplier or factory, especially those in China offering competitive ABS CNC machining quotes, can help reduce costs while ensuring quality.

How to Machine ABS Plastic?

ABS plastic is machined using precision CNC machining techniques such as milling, turning, and drilling. ABS CNC machining services typically use CNC machines designed for plastics to produce high-quality parts with smooth surfaces and tight tolerances.

When machining CNC ABS machining parts, proper tooling, speeds, and feeds are selected to avoid melting or deformation. Choosing an experienced ABS CNC machining manufacturer or supplier ensures that your CNC machining ABS parts meet exact specifications with excellent finish and durability.

What are the limitations of ABS, and how do we handle them?

ABS softens at about 81 °C under load, so parts that see higher temperatures should be made from PC, which handles more heat, or PEEK for demanding conditions.

ABS yellows and becomes brittle after long sun exposure. For parts used outdoors, we can paint them with a UV-resistant topcoat to slow this. For long-term outdoor service, a UV-stabilized material is the better choice.

Many solvents, including acetone, attack ABS. Painting adds a barrier layer for light contact. For direct chemical exposure, we recommend POM or PTFE, depending on the chemical.

Thin ABS walls flex under load. Ribs in the design add stiffness without adding wall thickness. Where higher stiffness is needed across a whole part, PC is the better material.

What ABS variants are available?

Flame retardant ABS is the main variant. It has added flame resistance but lower tensile strength (about 38 MPa versus 41 MPa for standard ABS) and lower heat resistance (about 88 °C versus 94 °C). Choose it when fire rating matters more than peak strength. Properties differ by grade, so confirm the grade before you finalize the design.

When should I choose ABS over PC or POM for a CNC machined part?

Choose ABS when the part needs impact toughness and clean machining at a moderate cost. ABS machines easily and holds a clean edge, which suits housings, brackets and covers. Its heat limit of about 81 °C under load rules it out near heat sources. If the part must stay stable above that, choose PC, which holds its shape at higher temperatures. PC is less forgiving on the machine, so it needs more care with tooling and cutting conditions. Choose POM when the part slides, wears, or must keep tight dimensions in humid conditions. ABS absorbs about 0.3% moisture over 24 hours, while POM absorbs far less, and POM resists many solvents that attack ABS.

Why machine ABS instead of injection molding it?

Most ABS products are injection molded, but molding needs a steel mold designed around draft angles, gate position and wall thickness. Machining needs no mold, so a design change is a new program, not new tooling. This suits ABS prototypes, fit checks and low-volume runs. Machining also makes features that are hard to mold, such as undercuts and square shoulders without draft. The trade-off is the surface. Machined ABS shows tool marks instead of the molded skin, so cosmetic parts may need sanding, painting or vapor polishing. At higher volumes, molding becomes the more economical route because the mold cost is spread across many parts.

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Project Started Today

With a range of finishing services to choose from and guaranteed quality thanks to our inspection services you can trust you will receive great parts every time. Once you send us your 3D CAD file, one of our customer service engineers will check your design for manufacturability to ensure that the part can be made to your expectations and budget requirements. Contact us today for a free quote!

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ABS CNC Machining

What is ABS?

ABS Material Properties at a Glance

Our CNC Machining ABS Capabilities

5-axis CNC Machining

CNC Milling

CNC Turning

Drilling and Tapping

Pocket Milling

Our ABS Finishing Services

As CNC machined

Sandblasting

Bead blasting

Painting

Vapor Polishing

Customized Logo

Electroplating

Screen printing

Keeping Both Faces Aligned

Controlling Distortion in Thin Ribs

Assembly Result

Supporting Details

VMT Case Study: Black ABS Control Box, CNC Machined in Small Batches

DFM Tips for Your Custom ABS Parts

Why Choose VMT

Why Choose VMT

16 Years as a Factory

Free DFM Review from the Shop Floor

No MOQ and Quotes Within 24 Hours

ISO 9001:2015 Certified Factory

What is the Application of ABS CNC Parts?

Our Other Plastic Machining Services

PC

POM

Nylon

PTFE

People Also Ask

See What Our Customers Say About Us

Get Your ABS CNC Machining Project Started Today

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Get Your ABS CNC Machining
Project Started Today