Here are things to check / ask when buying a used Mondiale Gallic 16 lathe, based on its specs and what people report. Good to have a checklist when you inspect it in person.

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What the Mondiale Gallic 16 Is Supposed to Be

Before you go, know the “standard” specs so you can spot anything off. Some reference values:

• Maximum swing over bed: ~ 415 mm.
• Centre (between centres) distance: ~ 1,500 mm.
• Spindle bore: ~ 45 mm.
• Speed range: about 40-2000 rpm in many units.
• Bed width ~ 320-330 mm.
• Tailstock quill: diameter ~ 65 mm, travel or quill length ~ 286 mm, adjustable depth ~ 127 mm.
• Power: ~ 5.5 kW for many machines.

Knowing these helps you see if a machine has degraded or been modified.

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What to Inspect & Test Carefully

Here are specific parts & functions to inspect when considering buying a used Gallic 16.

1. Bed, Ways, and Slides
   • Check the bed (ways) for wear: flatness, straightness, any dips or “wear lines” (especially near tailstock end).
   • Inspect the cross-slide, compound slide, apron: do they move smoothly throughout travel, or are there scratch marks, binding, or slack.
   • Check gib adjustment: excessive wear or poorly adjusted gibs can cause play.
2. Headstock & Spindle
   • Test spindle run-out (radial and axial) using a test bar. Any wobble means bearing wear or misalignment.
   • Examine spindle bore for wear or elongation. Keyways, threads or taper should be clean.
   • Check all spindle speeds: low speed, high speed, and everything in between. Are the gears / belts / speed gearbox (if present) working without noise or vibration.
3. Tailstock
   • Tailstock quill: test its alignment with spindle axis. The quill should lock firmly and move smoothly.
   • Check taper / centre for damage or excessive wear.
   • Test maximum quill extension: is there support, is it rigid enough.
4. Feeds, Leadscrew & Gearbox
   • Test lead screw / feed box: for backlash, wear of threads. Especially when doing threading, check whether thread pitches are accurate.
   • Levers / gear trains: do all feed rates and threading gears engage without excessive play, grinding, or noise.
   • Check the gear oil / lubrication in the feed box.
5. Speed & Power Electronics / Drive System
   • Motor: inspect for overheating, strange noises.
   • Electrical wiring: look for corrosion, insecure connections, safety switches.
   • Control levers, dials: make sure they move cleanly and give consistent feedback.
6. Tailstock Quill and Morse Tapers
   • Check quill travel and locking. If worn, the quill may sag under load.
   • Verify that taper fits (Morse #4 or whatever is specified) are not damaged / excessively worn.
7. Overall Precision & Test Cuts
   • Do a sample job / test pieces to check turning accuracy, taper, finish.
   • Check that the cross slide and longitudinal slide return to zero accurately.
   • Measure over full centre distance if you plan to use long workpieces to see how consistent it stays.
8. Coolant & Lubrication Systems
   • If there is a coolant pump: test it; check hoses, tank, leaks.
   • Lubrication for apron slides, ways, spindle head should be working; check oil levels and if lubricant flows properly.
   • Check for signs of past neglect (dry slides, rust, dryness in lubrication paths).
9. Physical Condition & Structure
   • Examine for cracks, weld repairs, corrosion on frame, bed, headstock.
   • Are covers / guards / door panels intact? Any missing parts?
   • Leveling: the machine should be leveled properly; uneven base or poor foundation leads to accuracy problems.
10. Accessories & Included Tooling
    • Is there a chuck (and type / condition) included? Faceplate? Steadies? Centres?
    • Tool holders, quick-change toolpost, etc. What is included, and what condition are they?
    • Spare parts: belts, gear teeth, leadscrew nuts etc. Availability and condition.

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Things That Often Go Wrong (Red Flags)

These are the usual issues that tend to cause trouble with older/conventional lathes like the Gallic 16.

• Spindle bearings worn or noisy. If machine has heavy loads or has had poor lubrication, bearings suffer.
• Worn ways / bed sag or wear, especially if long workpieces have been run without support.
• Backlash in the leadscrew or feed mechanism (wear in the half-nuts etc.).
• Taper damage in tailstock or spindle from misuse / crashes.
• Gearbox noises: worn gears or bearings inside (especially in speed change gearbox).
• Electrical issues: insulation, overheating, wiring cracks.
• Poor or missing lubrication: dried up or dirty slides / ways, rust, degraded oil.

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Questions to Ask the Seller

To supplement what you inspect, good questions include:

• What is the age (year of manufacture)?
• What is total usage (hours) or estimated work time?
• Any maintenance history: spindle bearings, ways, alignment check, lubrication, belt / gear changes.
• Has the machine had any crashes / misuse (chuck / tailstock collisions, heavy part crashes)?
• What accessories are included?
• Is the machine still under power so you can run test cuts / see spindle speeds etc.?
• Are any parts difficult to source locally (belts, gears, spindle components)?