Selling guide · Printable checklist

How to Prepare a Used CNC Machine for a Faster Sale

Serious buyers screen a used machine the same way every time: identity, hours, control, spindle, wear, what is included, and how it gets out of your building. Answer those questions before they ask, and you get fewer tire-kickers, fewer “can you send one more photo” loops, and less room for a last-minute renegotiation. Print this and work through it before you list.

Print this checklist Questions? Call / text 508-343-1219

1. Gather the records first

• Machine plate photographed: make, model, serial number, build year.
• Control family and software version written down (Fanuc, Haas NGC/Classic, Mazatrol, OSP, Siemens, Mitsubishi, Heidenhain, etc.).
• Spindle (cutting) hours and power-on hours, read off the control screen. Write both down and photograph the screen.
• Options list: what is actually enabled on the control (rigid tapping, high-speed look-ahead, probing, 4th/5th axis, through-spindle coolant, extra memory). Not what the original quote said.
• Travels, table size, taper (CAT/BT 40/50, HSK), max RPM, tool changer capacity and electrical requirements (voltage, phase, amps) from the manual or plate.
• Maintenance history: oil changes, way lube, coolant service, filter changes, any spindle rebuild or ballscrew work with invoices, dates and who did the work.
• Any alignment, level or ballbar reports you have, even old ones.
• Manuals: operator, maintenance, electrical/wiring diagrams, parameter sheets. Paper or PDF both count.

2. Back up the control before anything is unplugged

• Full parameter backup to card, USB or PC, plus a printout or photo of key pages if you can.
• Ladder / PMC backup and any macro variables or custom screens.
• Pitch-error compensation, tool offsets and work offsets saved where they apply.
• Option codes or keys recorded, so a dead memory battery doesn’t take options with it.
• Memory backup battery checked or replaced while the machine is still powered.
• Programs: keep or wipe your own part programs. Customer programs and proprietary data should come off before a buyer sees the machine.

A machine with a clean backup is a known machine. A machine without one can turn into an orphaned control after the move, and buyers price that risk in.

3. Clean it and stage it

• Chips out of the enclosure, table, T-slots, chip pan and conveyor.
• Coolant tank pumped out and sludge removed, or at least the condition shown honestly. Sludge and rust are the first thing a buyer reads as neglect.
• Way covers, wipers and ballscrew boots wiped down so their condition is visible.
• Spindle taper cleaned and lightly oiled; no holder left sitting in it for photos.
• Electrical cabinet vacuumed with power off (lock out first). Dust and debris in the cabinet raise questions.
• Clear floor space around the machine so it can be seen, photographed and later rigged out.
• Tooling, holders, vises and accessories gathered in one spot and counted.

4. Prepare a power-on demo

• Keep the machine under power for as long as possible. “It ran when we shut it off” is worth far less than a live demo.
• Warm up the spindle and run it up through its RPM range.
• Jog each axis full travel; cycle the tool changer through every pocket.
• Run coolant, through-spindle coolant, chip conveyor, probing and pallet changer (if equipped).
• Have a simple test part or program ready if a buyer asks to see it cut.
• Let a buyer indicate the taper (TIR) or run a short ballbar test if they ask. Saying yes builds trust; refusing usually costs more than the test.
• If the machine can’t be powered, say so plainly and explain why.

5. Photos and video buyers actually want

1. Full machine, front and both sides, in good light
2. Machine plate (make, model, serial, year), readable
3. Control screen powered on, showing spindle hours and power-on hours
4. Control screen showing software version and alarm history (if available)
5. Spindle taper, clean, lit and close up
6. Table and T-slots, top-down
7. Way covers and ballscrew boots on each axis
8. Tool changer / carousel, plus the tooling and accessories laid out together
9. Electrical cabinet, doors open
10. Chip conveyor and coolant tank
11. Any damage, crack, weld or repair, shown up close

Video: a short walkaround plus a clip of the spindle running up, axes jogging and a tool change answers more questions than any number of still photos. Keep the audio on so buyers can hear the spindle.

6. Be honest about issues

• List known problems in writing: alarms, noises, leaks, weak axes, dead options, missing covers, crash history.
• Say what was repaired, when and by whom, and what wasn’t.
• Note anything you don’t know, rather than guessing.
• Disclose the materials it cut most (aluminum, steel, stainless, cast iron, abrasives). Buyers ask, and the wear will tell them anyway.

Problems found at inspection cost you more than problems you disclosed up front. Disclosure keeps the deal moving; surprises restart the negotiation.

7. Disconnect, rigging and removal

• Decide who disconnects power and air: your electrician, the buyer’s, or the rigger. Use a licensed electrician for the electrical disconnect.
• Drain coolant and way lube, secure the spindle head and axes, and lock the tool changer per the manual’s shipping instructions.
• Keep or locate shipping brackets and lifting points; note them in the listing if you have them.
• Measure the path out: door width and height, floor load, ramps, dock or drive-in access.
• Approximate machine weight and footprint from the manual so riggers can quote.
• Agree in writing who pays for and schedules rigging, and who is liable for damage during removal.
• Set a pickup window that works for your shop, so the machine doesn’t sit in the way.

8. Build the sale package

9. How to describe it

• Title: year, make, model, control. Example format: “Year Make Model, Control, Taper, Travels.”
• First lines: both hour readings, options enabled, and whether it is under power.
• Specs: travels, table size, taper, RPM, tool capacity, electrical requirements.
• Condition: what works, what doesn’t, recent service.
• Included package: tooling and accessories listed item by item.
• Logistics: location, rigging access, pickup window.
• Plain language, no hype. Buyers trust numbers and photos over adjectives.

Clearing out more than one machine?

Surplus inspection gear sells better with its own checklist; see the used gage buying checklist on Used Gages. Scrap metal, chips and worn carbide from the clean-out can go to Machine Shop Scrap. When it’s ready, here is how selling a used CNC machine in Massachusetts works. And to see your machine the way a buyer will, read our used machining center buyer checklist.