The full guide to Gree's five-axis lineup, in-house components and published specifications.
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CNC Buyer Self-Check: 8 Questions Before You Buy
Why this page exists.
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10
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Useful even if you buy elsewhere
What you get at the end: the machine family that fits your parts, the three to six specifications that actually matter for your particular combination of answers, the flags to resolve before you sign anything, and a table of your own answers that you can paste straight into an enquiry email.
Most machine-tool enquiries start with a brand name and end with a price war. That order is backwards. The part you need to make dictates the machine — not the other way round — and a supplier who answers your questions before quoting is a very different kind of supplier from one who answers them after.
This page does three things. It gives you eight questions that turn a vague idea into a specification. It shows you which catalogue numbers actually matter for your combination of answers and which are marketing noise. And it hands you ten questions to ask any supplier — including us — before you compare a single price.
Everything here is free, runs in your browser, stores nothing, and works whether you end up buying from us or from someone else. That is deliberate: an informed buyer is a better customer, and a customer who was told the truth about limits is one who comes back.
The self-check
Answer honestly rather than aspirationally. If you answer for the part you hope to win next year instead of the one on your floor today, the output will be a wish list rather than a buying guide. Nothing you select is sent anywhere — the calculation happens in this page.
1 What material do you machine most?
Material drives the spindle torque curve and the machine's rigidity class more than any other single factor.
2 How big is your largest regular workpiece?
Take the biggest part you make more than twice a year, not the one-off monster you subcontract out.
3 What does the geometry demand?
"5-axis" means five axes moving at once so a complex 3D surface finishes in one setup. It is a capability you either need for the geometry or you do not.
4 What tolerance must you hold in production?
Be precise about this. The gap between ±0.05 mm and ±0.005 mm is the gap between one class of machine and another — and between one price band and another.
5 How do you actually run the shop?
Duty cycle — how hard and how continuously the machine works — decides whether you need a production-rated machine or a job-shop machine.
6 What do you expect from after-sales service?
This is where overseas purchases succeed or quietly fail. Be honest about what you can absorb.
7 Which of these would you least like to compromise on?
There is no wrong answer, but there is no free lunch either — these four pull against each other.
8 When does the machine need to be cutting?
Include shipping, installation, commissioning and operator training — not just the ex-works date.
Ten questions to ask any supplier before you compare prices
These are the questions that separate a machine you can live with from a machine you will fight for a decade. Any serious supplier should be able to answer all ten in writing. If a supplier answers one of them with "don't worry about that", treat it as the most important question on the list.
- Is the stated accuracy measured unloaded or while cutting? A positioning figure taken with an empty table is a different number from one taken under load with the spindle warm.
- Which standard was it measured to — ISO 230-2, VDI/DGQ 3441, or JIS B 6201? They are not interchangeable, and a supplier who knows the difference is a supplier who measures.
- At what ambient temperature, and is thermal compensation included? Machines grow as they warm. Compensation software and a controlled environment matter more than the raw spec sheet.
- What exactly is in the spindle's torque curve, not just its peak power? Peak kW sells machines; torque at the rpm you actually cut with makes parts.
- Which components are genuinely built in-house and which are bought in? Both are legitimate. What matters is that the answer is specific rather than a slogan.
- Who holds stock of wear parts and where? Ask for the physical location of the nearest spare-parts inventory and the typical courier time to your postcode.
- What is the real commissioning scope? Is installation, levelling, test cuts and operator training included, or billed as extras after the machine lands?
- Can I run my own part as a paid trial before I commit? A supplier confident in the machine will say yes. This single test replaces most of the rest of the diligence.
- What is the control system, and who supports it locally? The control is what your operators touch every day. Ask who you call when it misbehaves in your language and your time zone.
- What is excluded from the warranty? Read the exclusions before you read the headline duration. That is where the actual terms live.
Five traps in a CNC specification sheet
| What it says | What to check instead |
|---|---|
| "Positioning accuracy 0.005 mm" | Measured how, where on the table, and at what temperature? A single best-case figure measured at one point tells you almost nothing about the corner of a 1 m table. |
| "15 kW spindle" | Peak power at what duty cycle, and what torque at low rpm? A 15 kW spindle that only delivers peak above 8,000 rpm will not help you cut stainless at 400 rpm. |
| "Rapid traverse 48 m/min" | Rapid traverse is non-cutting travel speed. It looks impressive and changes your cycle time far less than acceleration and tool-change time do. |
| "Fully in-house core components" | Ask which ones. Self-built spindle, motor and rotary table is a genuine advantage. Nobody builds every bearing, grating scale and encoder in-house — and a supplier claiming they do is not being straight with you. |
| "Tool capacity 24 / 40 / 60" | Capacity is fine; what matters is chip-to-chip tool-change time, which is the number that actually shows up in your cycle. |
When a Chinese machining center is the wrong answer
We sell Chinese machine tools, so we have every reason not to write this section. We are writing it anyway, because a buyer who discovers a mismatch after delivery costs far more — in money and in reputation — than one who was told up front.
- Certified aerospace or medical work with traceable process validation. If your customer audits your process and demands documented, long-term capability data, established European, Japanese or US builders still carry that paperwork more easily. This is about documentation maturity, not about whether the iron can hold the tolerance.
- You need an engineer physically on site within 24 hours. Service networks are being built out — including ours in South-East Asia — but they are not yet as dense as those of brands that have been on your continent for forty years. If your business cannot absorb a two-day wait, say so early and plan spare-parts stock accordingly.
- Your parts push the very edge of the tolerance band, every day, unsupervised. Modern Chinese machines reach impressive figures. Holding them across three shifts, five years and varying ambient temperatures is where the gap with the premium tier still shows.
- You are replacing one machine in a cell of established brand equipment. Mixing control systems, post-processors and CAM setups has a real cost. Sometimes the correct answer is to match what you already run.
- Resale value in your local market is a material part of your business case. In many regions, a used European or Japanese machine still commands a stronger second-hand price than a used Chinese one. That gap is narrowing, but it has not closed.
Where we are not the best fit
Being specific about this is the cheapest filter we have. We are an authorised distributor for Gree Intelligent Equipment, and we are the wrong call for you if:
- You need sub-micron grinding or jig-boring work — that is a different class of machine tool entirely.
- You want a single general-purpose machine to do everything. Gree's line-up is deliberately scenario-specific; a shop needing one machine for wildly varying work may be better served elsewhere.
- You are buying purely on the lowest headline number. We will not win that race and we do not try to.
The one piece of advice we give every buyer. Pay for a trial part. Send the drawing, agree a price for the machined component, and run it over a full working shift on the machine you intend to buy. Twenty minutes of polished demo footage tells you what the machine can do once. Eight hours tells you what it will do to you for the next five years.
Frequently asked questions
Do I really need a 5-axis machine?
Only if your parts have compound angles or 3D sculpted surfaces that would otherwise need several setups. A 3-axis machine with a good fixture beats a 5-axis machine that is badly programmed. If more than roughly 70 percent of your work is prismatic top-down machining, the extra axes usually sit idle while you pay for their complexity.
What tolerance can a Chinese machining center realistically hold?
Published positioning and repeatability figures from leading Chinese builders are now in the same range as mid-tier Japanese and Taiwanese machines. The gap shows up less in a single part and more in consistency across a long shift and across years. That is why a paid trial part cut over a full working shift tells you more than any catalogue number.
How should I compare quotes from different suppliers?
Do not compare the machine price first. Compare the measurement protocol: ask each supplier to state whether the quoted accuracy is measured under no load or while cutting, which standard it follows, and at what ambient temperature. Two quotes quoting the same number can describe very different machines.
What is the most common mistake first-time CNC buyers make?
Buying the machine before defining the part. The part dictates everything: work envelope, spindle torque curve, axis count, chip management and probing. Buyers who start from a drawing end up with a machine that earns money in month one; buyers who start from a brand shortlist often spend the first year discovering what they actually needed.
Related reading
Want a second opinion on your answers?
Send your part drawing, material, tolerance and target volume. We will tell you which machine family fits — and, if the honest answer is that we are not the right supplier for that part, we will say so.
