If you’re considering purchasing a pre-owned/surplus Liebherr LFS 380 CNC gear-shaper made in Germany, here’s a smart investment checklist to help you evaluate the machine properly and avoid common pitfalls. I’ll highlight what to check, what questions to ask, and what risks to mitigate.

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Why the LFS 380 is interesting

Before diving into the checklist, a quick reminder of what this machine offers (so you know what you’re buying).

• The LFS 380 is a CNC gear-shaping machine for internal & external gears (and pinions) that has appeared in used-machine listings.
• Example specs: one listing shows maximum gear/workpiece diameter ~ 14.96″ (≈ 380 mm) and center distance up to ~ 17.71″ (≈ 450 mm) for that unit.
• It typically uses a Siemens 840D CNC control (in later models) and has automated features like tailstock, ring loader, tilting column.
• Being made by Liebherr (Germany), build quality tends to be high; spare parts & support may still be available through their gear-technology division.
  Given all that, a well-conditioned used LFS 380 can be a strong machine—but only if you do your homework.

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Due-Diligence Checklist

Here are the key factors you should inspect, verify, and negotiate before buying. Think of this as your “pre-purchase audit”.

1. Machine specification & suitability

• Confirm model exactness: “LFS 380” (and any suffix/variant) – ensure you’re comparing apples to apples.
• Check capacity: for your gear-making needs, ensure the machine’s maximum workpiece diameter, face width, module (gear size), and stroke/center distance match your parts. For example, one spec: maximum face width ~ 8.26″ and center distance ~17.71″.
• Check module range (size of gear teeth it can cut). If you will produce large module/gears, ensure machine supports it. The LS/series brochure gives ranges for modules and diameters.
• CNC control version: older vs newer (Siemens 840D is good). Ensure control is in good condition and software still supported.
• Automation/loaders: Does machine include loader, ring loader, tailstock, tilting column, etc? These features add value. One listing: “180° ring loader and tailstock” on LFS 380.
• Footprint & weight: Used machines may weigh many tons (one listing ~ 32,000 lbs ~14.5 t) and need heavy equipment for transport.
• Machine origin: Germany, make sure you have full documentation (manuals, wiring diagrams, original drawings).
• Spare parts availability: Though Liebherr is premium, older machines may have components discontinued—check stock of key spares (hydraulics, control boards, etc).

2. Condition & service history

• Ask for operational history: Was the machine used heavily (production 24/7) or lightly (R&D)? A listing said “R&D Facility… manually loaded” which is a favourable sign.
• Inspect under power (if possible): ensure all axes move smoothly, no excessive vibration, no abnormal noise, hydraulic/pneumatic systems leak-free.
• Inspect tooling/spindle/gear head: Check spindle bearings, backlash in gearing, cutter head slide wear.
• Check CNC control: any error logs? Are all axes working? Are all safety features intact?
• Check automation: loader, tailstock, any rotary tables or pallets—are they functioning properly?
• Check cleanliness and chip-management: gear shaping produces chips; if the machine was poorly maintained you may have residual wear from chip accumulation.
• Check for modifications: Has the machine been altered, parts replaced with non-original components, modifications done by previous owner? Ask for documentation on modifications.
• Check for downtime/spares: What is downtime history? Are any spares missing, any known about used parts that need replacement soon (e.g., linear guide rails, ball screws)?
• Alignment check: After transport the machine will need to be re-leveled and aligned; ideally verify last alignment records.

3. Infrastructure, installation & compatibility

• Floor loading: Is your shop floor capable of handling the weight and footprint of the machine-? Reinforced bed? Vibration isolation?
• Utilities: Verify power requirements (voltage, phases, amperage). Example listing: “480 Volt” for LFS 380. Also check cooling water, chip conveyor drainage, mist extraction.
• Layout and installation: Access doors, shipping/rigging, crane capacity for installation.
• Automation integration: If machine has loader or ring loader, check if it fits into your workflow/automation cell.
• Spindle tooling and cutter head tooling: Do you have compatible tooling or need to purchase new?
• Control language/interface: Is the control in a language your operators understand? Are there program libraries available?
• Spare parts supply chain: For a used machine you may need to budget for spares/consumables early.

4. Software, programming & training

• Check CNC software version: Older versions may no longer be supported, making future updates/spares harder.
• Gear-shaping software capabilities: Does it support the helix angles, modules, internal/external gears you need? One brochure mentions capability for tapered gears/helix angles.
• Training: Will supplier or previous owner provide training on how to run, maintain, and program?
• Documentation: Ensure manuals for mechanical, hydraulic, electrical, CNC control, loader system are present.
• Programming libraries: Are there pre-set programs for common gears? This reduces changeover time.

5. Total cost of ownership & risk factors

• Price vs value: Compare cost of machine + transport + installation + setup vs a newer machine or alternative machine.
• Hidden costs: Refurbishment of older machine, replacement of worn parts, control upgrade, automation integration, downtime until operational.
• Obsolescence risk: As machine ages, components may become obsolete (e.g., control boards), which might cause expensive retrofit in future.
• Future demand: Will the machine’s capacity (size, module) cover your future production needs? If you outgrow it, you risk depreciation.
• Machine’s remaining life: How many hours/years of operation remain? Has major overhaul been done?
• Support & spare cost: Premium machines have good build quality, but spares can be expensive and delivery slow for older models.
• Resale value: If you decide to upgrade in future, what is resale market for this model?
• Regulatory compliance: Especially in Turkey/EU, ensure machine meets safety/CE compliance; ensure emissions (coolant mist extraction), noise levels, electrical safety are acceptable.

6. Inspection & test-run checklist

When physically inspecting the machine, here’s a practical list to check:

• Visually inspect overall condition: corrosion, paint, guards, chip removal, coolant tank.
• Power up machine: Check axes movement (X, Y, Z or equivalent), backlash, noises, hydraulic pressure.
• Run a test program (if possible): Cut a sample gear or at least simulate various operations to check performance.
• Measure spindle tool taper accuracy and run-out.
• Check cutter head slide travel and linear guide condition.
• Check tailstock/tail support if present: movement, alignment.
• Check loading/automation: if ring loader or tailstock is included, run its sequence.
• Check CNC control panel: responsiveness, error history, program storage, backup.
• Inspect electrical cupboard: clean wiring, original components, no evidence of overheating.
• Check machine alignment and leveling (if possible).
• Inspect chip conveyor and coolant system, suction/mist collector, filtration.
• Ask about consumables: Are toolholders, cutters, fixtures included? What’s condition of those?
• Check documentation: Date of last preventive maintenance, service records, any repairs/overhauls done.

7. Negotiation & purchase contract tips

• Get a full machine specification sheet from seller (year, serial number, hours, usage history).
• Include clause “subject to inspection under power”—you must see it working before finalizing.
• Verify that all included accessories (loaders, tailstock, ring loader, clamps) are part of sale or list separately.
• Agree on who is responsible for dismantling/transport/installation—often older machines have high relocation costs.
• Include a warranty period if possible (even limited: e.g., 30-60 days after installation) for major items (control, drives).
• Check for original manuals and as-built drawings—missing manuals reduce value.
• Payment terms: use escrow or phased payment (e.g., deposit, payment after inspection) if possible.
• Know the customs/installation issues for Turkey (if you’re importing) or EU. Transport, duties, VAT, installation costs may add significantly.

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Summary Table of Risk vs Benefit

Factor	Benefit	Risk if ignored
Machine spec match	Machine fits your parts & future needs	You buy machine that cannot handle your work → wasted investment
Condition & history	Lower maintenance cost, longer remaining life	Hidden wear, breakdowns, high repair cost
Infrastructure fit	Easier installation, faster ROI	Unexpected cost/time for installation, retrofit, poor production start‐up
Software & training	Operators productive quickly	You struggle to program machine, high downtime and trained operator shortage
Total cost of ownership	Transparent budgeting	You underestimate spares/obsolescence cost → lower ROI
Inspection & contract	Clear scope, fewer surprises	You buy a machine and find missing parts/wiring/control later

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Final Advice

• If you find an LFS 380 in excellent condition (low hours, full documentation, good automation, recent control version) for a good price, it can be a strong buy.
• But don’t buy based solely on brand. Build quality is good, but older machines still carry risk of hidden wear, obsolete parts, or large integration costs.
• Set aside a realistic budget for installation + commissioning + initial spare parts—often buyers underestimate this.
• Consider future proofing: Is the machine going to meet your future production needs (gear sizes, modules, automation)?
• Before closing the deal: inspect under power, get all specs confirmed, review service history, evaluate spare parts availability, and ensure you have full rigging/installation plan.