Pocketed enclosures
Define the internal clearance, mounting points and the faces that will remain visible after assembly. Mark any connector openings on the drawing.
ABS CNC
Machining
Custom ABS housings, covers, panels and machined components for prototypes and production orders. VETCNC offers ABS milling and turning, with grade, appearance and assembly requirements defined for the part.
Custom ABS housings and machined components
Sensor housings and lids
Lid fit, cable openings and locating features define sensor housings. The body and cover need a coordinated assembly specification.
Instrument faceplates
Separate cosmetic faces from button, display and connector locations. Use a drawing to control openings; a photograph alone cannot define their positions.
Mounts and interface brackets
Describe the attached components, fasteners and service loads. Flag thin webs, supported faces and any requirement to fit an existing assembly.
Prototype nests and fixtures
Provide the supported part or its interface drawing. Agree contact areas, access for assembly and the inspection state before making the fixture.
Collars and spacers
Call out mating diameters, shoulders and the condition in which the fit is measured. ABS is not automatically a substitute for a specified bearing plastic.
Illustrative part shapes. Each inquiry is reviewed against its drawing.
Specify the ABS grade, stock and color
ABS is a thermoplastic used for impact-resistant housings, covers and prototypes. Machining-grade stock is offered separately from general-purpose grades, so “ABS” alone is not a complete purchasing specification.[1]
Start with the required manufacturer's grade or agreed material specification. Then identify stock form, color and the documents needed with the order. A previously approved molding resin or printed sample is useful context, but it does not confirm that an equivalent sheet or rod is available.
- Material identity
- Manufacturer, grade and approved alternatives
- Starting stock
- Sheet, plate or rod; dimensions to be confirmed
- Appearance
- Base color, texture and visible-surface reference
- Release basis
- Agreed drawing, sample and acceptance requirements
Machining-grade ABS stock
Ask for stock intended for machined components when the drawing calls for close dimensional control. Confirm its grade, material condition and usable size before committing to a build.[3]
Application-specific grades
Outdoor exposure, electrical behavior, fire performance or regulated contact requirements belong in the specification. A general ABS label is not evidence that a particular requirement is satisfied.
Color and sample matching
Specify whether a named color, a retained physical sample or a later coating controls the appearance. Require approval before changing the stock grade, color or surface-treatment route.
The quotation identifies the ABS grade, stock color, part quantities and agreed manufacturing scope. Application-specific requirements stay tied to the approved material specification.
| Property | Unfilled ABS TECARAN ABS grey | Test condition |
|---|---|---|
| Density (g/cm³) | 1.04 | — |
| Tensile strength (MPa) | 32 | 50 mm/min |
| Tensile modulus (MPa) | 1,700 | 1 mm/min |
| Notched impact strength (kJ/m²) | 34 | Charpy, max. 7.5 J |
| Hardness (Shore D) | 75 | Shore D |
| Water absorption (%) | 0.07 / 0.20 | 24 h / 96 h at 23°C |
Typical properties of TECARAN ABS grey; other ABS formulations use their own grade data.
ABS milling and turning
CNC milling for pockets and openings
A drawing can combine enclosure pockets, flat faces, connector openings and drilled features. Review tool access, support and the locating faces together; one feature may change the setup for the rest of the part.
CNC milling servicesCNC turning for round interfaces
Turning covers bores, shoulders and stepped diameters in collars and spacers. Off-axis features may need a secondary operation.
CNC turning servicesHeat, released stock stresses and clamping force can affect a plastic part's final shape. Review suitable stock, chip control and part support against the drawing.[2]
Review thin walls, mounting points and mating faces
1 Unsupported walls and deep pockets
Mark the final wall, pocket depth and any area intended to flex. A narrow wall with a long unsupported span needs a different review from a short rib. Agree which areas may be clamped or supported, since a long thin span distorts under holding pressure that a short rib tolerates.
2 Fasteners and repeated assembly
Identify the screw, engagement and how often the part will be opened. Discuss inserts or another joining method where required. Do not assume that a hole diameter alone defines the performance of the assembled joint.
3 Internal corners and lid fit
Show the mating cover, datum surfaces and allowed corner geometry. A round cutter leaves a radius in a milled internal corner; discuss a relief or an alternative feature only where the design owner permits a change.
ABS appearance and finishing options
Visible faces · mounting surfaces · lid interface
Separate tool marks from cosmetic defects
Identify which faces are normally seen and which are hidden after assembly. Agree whether a machined surface, retained stock surface or reference sample controls each face. Color names alone do not define gloss, texture or acceptable marks.
Review the visual sample under the agreed viewing conditions. Keep that sample reference tied to the drawing revision and record which surfaces it covers.
Approve the coating and its boundaries
When a coating is requested, specify color, gloss, compatibility evidence and the surfaces to mask. Identify whether the final dimensions are inspected before or after the coating, and who approves the finished sample.
Do not treat paint as an automatic way to meet an outdoor, chemical or fire-performance requirement. The complete material and finish combination needs review.
Bonded ABS assemblies
Provide the assembly drawing, adhesive or joining specification, contact areas and required appearance. Agree the assembly process and the acceptance state separately from machining the individual components.
Any bond, cleaning agent or solvent exposure must be assessed for the chosen ABS grade. Final fit, appearance and joint performance require the appropriate sample checks.
ABS dimensions and inspection conditions
| Feature | Specification | Acceptance condition | Verification |
|---|---|---|---|
| Holes and locating features | Diameters; positions; datums; mating part | Defined support; sample/lot requirements | Specified measurement method |
| Flat covers and flexible walls | Functional surfaces; form limits; intended flex | Free-state, supported or installed | Form checks in specified condition |
| Threads and inserts | Thread/insert specification; assembly requirements | After specified insertion or joining | Thread and assembly checks |
| Finished color and dimensions | Reference sample; finish areas/boundaries; final dimensions | After specified finishing | Separate dimensional records and cosmetic sample approval |
Plastic dimensions can change with temperature. For a sensitive fit, define the measurement and service conditions rather than copying a tolerance from a metal component.[2]
When to consider another plastic
A sliding or wear-loaded interface
Sliding collars and guides need defined load, motion, lubrication and mating material before ABS is compared with POM or nylon.
Review POM machiningA transparent viewing area
State whether transparency is functional or cosmetic, because an optical window carries acceptance criteria that an opaque body does not. Review the window separately from an opaque body, including optical and surface acceptance.
Review acrylic machiningA different temperature or exposure
Provide the actual environment and required grade. Changing to another polymer is a design decision that needs approval, not a silent substitution during quoting.
Compare engineering plasticsFrom an ABS prototype to a repeat order
Drawing and ABS specification
Match the model, drawing and revision. Confirm grade availability, quantities and any proposed changes before material is purchased.
Sample checks and acceptance
Identify the assembly and appearance questions that a sample must answer. A prototype approval only covers the agreed checks and configuration.
Repeat production approval
Record the approved grade, color, revision and finishing route. Agree how substitutions or process changes would be reviewed.
Protect the delivered parts
Specify packing for visible faces and delicate walls, lot identification and the inspection records to send with the order.
What affects ABS machining cost?
Stock availability, material removed, setups, delicate features, appearance work and inspection can all change the quote. Request separate sample and repeat-order quantities; a forecast is not a released order.
ABS CNC machining questions
When should I choose CNC-machined ABS rather than a printed prototype?
Choose CNC machining when the sample needs to represent a specified machinable ABS stock grade, final machined mating faces or a machined surface. For early packaging and assembly iterations, a printed sample can be appropriate if its dimensions and surface meet those checks. Load-bearing validation must use the actual print material, process and orientation; the shared ABS name does not make the two routes mechanically equivalent.
Is CNC-machined ABS the same as an injection-molded ABS part?
A machined ABS prototype can help assess geometry, but material form and manufacturing route differ from injection molding. Molding behavior and final-part requirements need separate validation.
What is the minimum wall thickness for a machined ABS housing?
There is no single wall value that we can approve without the drawing. Unsupported span, pocket depth, corner access, mounting loads and how the part is held all matter. Mark the finished wall and any flexible area so the design and process can be reviewed together.
What tolerances can VETCNC hold on ABS parts?
Tolerances must be confirmed for the actual drawing, ABS grade and final condition. Identify the assembly-critical dimensions and how they will be measured.
Can an ABS part have a textured or painted finish?
Identify whether you need retained sheet texture, a machined finish or a separately applied coating. Cutting a new surface does not reproduce a stock sheet texture. For paint or coating requests, agree compatibility, masking, final dimensions and a visual reference before production.
Is standard ABS suitable for outdoor or high-temperature use?
Do not approve it from the name ABS alone. Standard and specially modified grades differ. Provide sunlight exposure, temperatures, load and cleaning chemicals; suitability must be checked against the exact grade and the application.[1]
Can you supply flame-retardant or application-approved ABS?
Specify the required ABS grade, performance requirements and supporting records. Sourcing, machining scope and any required rating or end-use approval need confirmation; any substitute needs your written approval.
Can threads or metal inserts be included?
They can be reviewed as part of the drawing. Specify the fastener, engagement, assembly frequency, load and any required insert. Confirm the insertion or assembly method separately, and agree which dimensions apply after that operation.
Your ABS part and appearance brief
Bring the material, drawing and visible faces into one inquiry
Use this optional brief to collect the decisions already made and the questions still open. The information stays in the page until you choose to include it in the quote form.
You can also skip this step and send a drawing inquiry directly. No material, tolerance or finishing choice is approved automatically.
Read the RFQ checklistPROJECT SUPPORT
Discuss your ABS part
Share your drawing, material and quantity. Tell us what you need and we will reply by email.
Related machining and design resources
Material references and scope
Material and machining references. Project-specific specifications and the supplier's current grade data govern the material requirements.
- Curbell Plastics — ABS material overview and grade distinctions
- Curbell Plastics — plastic machining and dimensional stability guidelines
- Curbell Plastics — machine-grade ABS stock category
Quote ABS parts against the specified grade, drawing revision and finished condition.
