Buyer guide for engineers and sourcing teams

Melbourne CNC Machine Service: 7 Proven Checks Before You Order

This guide is for Melbourne design engineers, product managers and procurement staff who need machined metal or plastic parts and are comparing suppliers. It covers the checks that decide whether a quote is usable: tolerance, size envelope, lead time, MOQ, certifications and how the supplier reports inspection. Read it before you send the same drawing to five shops.

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±0.005 mm tolerance3–5 day shippingNo MOQISO 9001 / IATF 16949

Melbourne CNC machine service workshop with 5-axis machining centers

On this page

1
Key takeaways
2
Which Melbourne CNC machine service fits your part
3
Tolerance: what ±0.005 mm really covers
4
Size envelope and machine count at the shop
5
Materials, finishes and what changes the price
6
Lead time, MOQ and certification: the buyer checklist
7
7 steps to place a Machined part order

Start here

Key takeaways

Match the machine to the geometryIf a part needs features on four or five faces, a 3-axis setup will cost you extra fixtures and re-fixturing error.

Tolerance is a range, not a slogan±0.005 mm is achievable on the right feature with the right setup; ask which surfaces carry it.

Lead time starts at the DFM replyQuotation with free DFM analysis inside 12 hours, production start within 24 hours, parts ship in 3–5 days.

No MOQ changes how you prototypeOne part and 10,000+ part runs go through the same quoting path, so iteration stays cheap.

Decision table

Which Melbourne CNC machine service fits your part

Use this table to pick the machine class before you ask for a price.

Part situation	Machine class	Why
Features on 3 faces, prismatic	3-axis mill	Simple setups, lowest hourly rate
Features on 4 faces	4-axis mill	One rotary setup, fewer re-clamps
Undercuts and compound angles	5-axis simultaneous	Tool reaches in one setup
Long thin housing, 4,000 mm	Large gantry travel	Single setup over full length
Turned shaft with milled flats	Mill-turn center	Turning and milling in one cycle
Titanium or Inconel bracket	5-axis with coolant	Heat control, less tool wander

Pick the machine class first, then compare prices

A quote only means something once you know the part fits a 3-axis, 4-axis, mill-turn or 5-axis setup. Send the drawing and we will tell you which one, and why.

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Check 1

Tolerance: what ±0.005 mm really covers

A Melbourne CNC machine service that quotes ±0.005 mm is stating a capability, not a promise on every surface of every part. That number holds on features cut in the same setup, with rigid tooling and stable material. It does not hold across a re-clamped part where the datum moves between operations.

Ask which surfaces carry the tight callout. On a typical aluminium housing, a bearing bore and a dowel hole may need ±0.005 mm while bolt clearance holes sit at ±0.1 mm without consequence. When a drawing puts tight tolerance on a cosmetic face, the quote climbs and nothing improves.

Surface finish follows the same logic. Ra 0.2–0.8 μm needs a finishing pass with a sharp tool and light depth of cut. Ra 1.6–3.2 μm comes off a normal pass and costs less. Specify finish only where a seal, bearing or optical path needs it.

Sending a STEP file plus a 2D drawing with datums and callouts is the fastest way to get a quote you can compare against another shop. A model alone tells us the shape, not the acceptance criteria.

Check 2

Size envelope and machine count at the shop

Part size decides which machine class is even eligible. Our largest travel is 4,000 × 400 × 150 mm on a gantry machine, which suits long extrusions, rails and structural housings. Medium travel of 750 × 1,150 × 550 mm and 600 × 600 × 600 mm covers most enclosures and plates.

Compact travel of 500 × 500 × 450 mm and 500 × 310 × 200 mm handles small brackets and connector bodies, often on a Ø400 mm rotary table. If your part sits near the edge of a travel limit, say so early. We may need to rotate the part or split the setup.

Machine count matters when you scale. The shop runs 127 high-precision CNC machines, including 16 simultaneous 5-axis machining centers, 12 four-axis mills, 27 three-axis machines and 16 mill-turn centers. That spread lets a job move to a second machine without a new process review.

A one-machine shop can only sell you its one machine. A shop with the full range will tell you when 3-axis is cheaper for your part, because the margin is not the deciding factor.

Check 3

Materials, finishes and what changes the price

Aluminium 6061-T6, 7075 and 6082 cut fast and hold tolerance well. Stainless 304, 316L and 17-4PH machine slower and wear tools, so the hourly cost rises. Titanium TC4 (Ti-6Al-4V), Inconel and magnesium AZ31B need tighter feeds, more coolant and 5-axis toolpaths to limit heat.

Plastics behave differently. POM and PEEK hold dimensions after machining; ABS and PP move with temperature and clamp pressure. If a plastic part needs ±0.005 mm, the material choice is usually the problem, not the machine.

Finish is a separate cost line. Anodizing in clear, colour, hardcoat or conductive grades, electroless nickel, zinc, silver and gold plating, powder coating, black oxide, bead blasting, tumbling, brushing and polishing are all quoted per batch, not per part.

Laser marking and engraving need a minimum character height of 1.5 mm to stay legible after anodizing. Serial numbers below that often fill in and become unreadable.

Check 4

Lead time, MOQ and certification: the buyer checklist

Lead time claims are only useful if you know when the clock starts. Our quotation and free DFM analysis come back within 12 hours, production can start within 24 hours, and parts ship in 3–5 days after that. Historical late-delivery probability sits below 2%.

MOQ is where a lot of Melbourne buyers get stuck. There is no minimum order quantity here, so a single prototype and a 10,000+ part run use the same quoting route. That matters when you are on revision 4 of a bracket and do not want to commit to tooling.

Certifications tell you which markets the shop can serve. ISO 9001:2015 covers general quality systems, IATF 16949:2016 covers automotive, ISO 13485:2016 covers medical devices, and ISO 27001:2022 covers information security for your drawings and files.

Inspection is the last item on the checklist. We run 100% inspection before shipment with raw material checks, in-process monitoring and final inspection, and reports go out on request. Ask for the report format before you order, not after.

How to order

7 steps to place a Machined part order

1
Send a STEP file and a 2D drawingInclude datums, tolerance callouts and finish notes. Missing callouts are the top cause of quote delays.
2
State the material and temperWrite 6061-T6, not just aluminium. Temper changes both machinability and the final part strength.
3
Flag the tight featuresMark the bore or hole that needs ±0.005 mm. Leave cosmetic faces at ±0.1 mm unless a seal sits there.
4
Say the quantity you actually needOne prototype or 10,000 parts, both are fine. Quantity drives setup amortisation, not eligibility.
5
Name the finish and masking areasAnodizing, plating or powder coat plus any surfaces that must stay conductive or uncoated.
6
Confirm the inspection report formatAsk for dimensional reports, material certs or first article inspection before production starts.
7
Sign the NDA if the design is sensitiveUploads stay secure and confidential, and an NDA is available on request before files move.

FAQs

Melbourne CNC machine service questions

Can you machine a part from just a 3D model?

Yes, we can quote from a STEP or IGES file. But a model without tolerance callouts leaves the acceptance criteria open, so the quote will assume general machining tolerance. If a bore, flat or pitch needs a specific limit, put it on a 2D drawing.

For simple brackets and covers, a model alone is usually enough. For anything with a mating interface, send both.

What is the smallest and largest part you can run?

The largest travel is 4,000 × 400 × 150 mm on a gantry machine, suitable for long rails and structural housings. The compact machines cover 500 × 500 × 450 mm and 500 × 310 × 200 mm, often with a Ø400 mm rotary table for small brackets.

If your part sits close to a travel limit, tell us the finished size and we will confirm whether it fits in one setup or needs rotation.

Do you supply material certificates?

Yes. Raw material is checked on receipt and reports are available on request. We machine aluminium 6061, 7075, 6082, stainless 304, 316L, 17-4PH, steel 4140, 4340, titanium TC4 and engineering plastics such as POM and PEEK.

For regulated programs, mention the standard you are working to so the material and documentation match it.

How do you handle tolerance on turned and milled features in one part?

A mill-turn center machines the turned diameter and the milled flats in a single cycle, so concentricity between them is controlled by the machine, not by re-fixturing. That is the right machine class for shafts with cross holes or milled flats.

If the part is mostly turned with one small milled feature, a lathe with live tooling may be cheaper. Send the drawing and we will say which route costs less.

What happens if parts arrive out of tolerance?

Every order runs through 100% inspection before shipment, with raw material checks, in-process monitoring and a final inspection. Reports are issued on request. If a dimension is outside the drawing, contact us with the measurement and the inspection report number.

We keep the setup data and inspection records so the cause can be traced to a setup, a tool or a drawing interpretation.

Do you work with Melbourne product teams on revisions?

Yes. With no minimum order quantity, a revised bracket or housing can be re-cut as a single part before you commit to a larger run. That shortens the loop between a fit test and the next design change.

Share the change notes with the new file so the DFM check focuses on what moved.