If you’re considering buying a pre-owned or surplus Citizen D25‑1M8 (32mm) CNC Swiss lathe made in Japan (often paired with a FMB TURBO 3-38 bar loader) then smart engineers will evaluate it thoroughly. Here’s a detailed checklist covering what to inspect, ask, and verify before purchase, tailored to this machine model and its typical configuration.

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Why this particular machine deserves careful review

• The D25-1M8 is a high-performance sliding-headstock Swiss-type lathe (bar capacity ~ 32 mm) from Citizen / Cincom.
• It features a double gang tool post layout, B‐axis control, rapid spindle speeds (10,000 rpm) and is designed for high productivity.
• The addition of a FMB TURBO 3-38 bar loader (for example) significantly boosts automation/throughput — making the machine capable of near‐unattended operation.
• Because of its complexity (sliding headstock, gang tooling, live tooling options, bar loader), a used machine brings more risk (wear, hidden issues, automation integration) than a simpler lathe.

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Pre-Purchase Assessment Checklist

Below are the major areas and specific items to inspect. You can tailor this into your on-site inspection worksheet.

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1. Specification and suitability check

• Confirm machine model and variant: D25-1M8 (Type VIII) as opposed to earlier Type VII (D25-1M7) – the “VIII” variant supports B-axis and more tooling.
• Verify bar capacity: many listings show 32 mm (≈1.25″) bar capacity for the 32mm version.
• Check maximum machining diameter and lengths: according to spec sheet, max diameter ~ 1″ (25 mm) for default D25-1M8, but some listings state 32mm upgrade.
• Check spindle speeds: main and sub spindles up to 10,000 rpm.
• Tooling configuration: double gang tool posts, Y/Z axes, B-axis (for Type VIII) – verify what tooling stations are installed.
• Automation / bar-loader: Confirm the FMB TURBO 3-38 (or similar) bar loader is present and functioning — this affects loading, cycle time, unattended shifts.
• Control system: Ensure it’s the correct CNC (e.g., Mitsubishi M850W) and appropriate for your tooling/automation integration.
• Suitability for your parts: Check if the bar diameter, part length, live tooling, sub spindle, gang tooling meet your production requirements (material, complexity, cycle time).

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2. Condition & usage history

• Request usage history: number of operating hours, shifts per day, maintenance logs. Was the machine used for high‐volume production of simple parts, or for complex/low-volume work?
• Review wear and tear on sliding headstock mechanism: sliding head machines present unique wear points (guide bushing, linear ways, sliding columns).
• Inspect spindle condition: Both main and sub spindles should be checked for bearing noise, run-out, thermal growth, vibration.
• Gang tool posts and live-tooling: These are expensive components – check for wear, especially on live tool spindles, rotary tools, tool posts.
• Bar loader & automation: The FMB loader must be functioning correctly (bar feed reliability, loader mechanics, sensors). In automation, loader issues often cause downtime.
• Coolant system and chip handling: Swiss‐type lathes generate a lot of chips and require good coolant/filtration. Check condition of coolant, sump, chip conveyor, cleanliness.
• Electrical/controls: Check the electrical cabinet (age of drives, condition of wiring, replacement parts availability), see if any major retrofits done.
• Maintenance records: Ask for rebuilds or major replacements (guide bush, headstock bearings, live tooling spindles). If missing, you may factor cost for upcoming refurbishment.
• Documentation: Ensure manuals, wiring diagrams, tooling lists, automation interfacing documentation available.
• Safety/compliance: Especially if importing into Türkiye/EU, check that machine meets required safety standards, interlocks, CE compliance (if required) or can be retrofitted.

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3. On-site functional inspection & testing

When you visit the machine location, bring measurement tools (dial indicator, run‐out gauge, drawbar check tool, etc). Perform the following tests:

• Bar feed / sliding head test: Load a bar, start up bar loader (if present), run the sliding headstock mechanism, check for smooth movement, absence of chatter, correct guide bushing operation if used.
• Spindle run-out: Mount a test gauge in main spindle, check run‐out at tool holder and collet; also check sub spindle if present.
• Tool post movement: Move gang tool posts through X/Z axes, check for backlash, chatter, smoothness. Check live tool spindles rotate cleanly without noise/vibration.
• Tool change / gang tool post assembly: If machine has automatic tool post or turret, test selection, tool change reliability.
• Cycle test: If possible, run a short production cycle or test the machine under load (with a representative part) to verify cycle time, surface finish, dimensional accuracy, sub‐spindle transfer (if used).
• Bar loader test: Running the FMB TURBO loader: load bars, test bar feed, ensure sensors, clamps, bar ejector/chute operate correctly.
• Control/facet tests: Verify CNC control operation, axes respond correctly, servo motor currents normal, no alarms/historics showing major faults.
• Chip & coolant management: Observe chip disposal, check for excessive chip accumulation, inspect coolant sump cleanliness, check filters, check if coolant smells burnt or contaminated.
• Alignment/leveling check: Visually inspect machine base, check if it appears level, if there are signs of past relocation, if foundation or floors have sag/unevenness.
• Documentation check: Match serial number, year of manufacture, check firmware/software versions, check what retrofits have been done.

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4. Infrastructure & integration requirements

• Floor loading: Swiss‐type machines can be heavy and may need reinforced floor or vibration isolation — check weight/footprint from spec and your facility’s floor load capacity.
• Utilities: Check electrical supply (voltage, phases, amps) — older machines may use 200V or 220V systems. Bar feeder may require compressed air, drive power, sensors.
• Chip/air/hydraulics: Check whether your facility has adequate chip disposal, coolant filtration, mist extraction, and bar loader air supply.
• Automation interface: If the machine is to be integrated into a cell (bar feeder, parts conveyor, robot), check existing wiring/interfaces, bar loader compatibility, safety interlocks.
• Tooling and consumables: Consider cost and availability of tooling (Swiss collets, guide bushings, live tool spindles, gang tool holders). If you invest in this machine you may need to invest in tooling.
• Spare parts and support: Check availability of service/support for Citizen machines in Turkey/EU, check if key spares (servos, control boards, live tool spindles, bearings) are still available for the D25-1M8 generation.

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5. Total cost of ownership & risk factors

• Price vs expected remaining life: Given usage history and wear, estimate refurbishment cost and remaining life before major rebuild.
• Hidden upgrade cost: Older machines might need control retrofits, loader updates, software updates — factor these in.
• Obsolescence risk: Live tooling/spindles may be discontinued or expensive; bar feeder models may not be future‐proof if parts limited.
• Downtime risk: A used machine with complex automation has more risk of downtime, which must be factored into ROI calculation.
• Tooling cost: Swiss machining often incurs high tooling cost (collets, guide bushes, live tooling) — align this with your cost structure.
• ROI timeline: Ensure machine’s productivity (cycle times, unattended hours) will allow payback within acceptable time — otherwise you may better invest in newer model.
• Resale value: Consider how the machine will resale in future. A Swiss lathe with bar feeder and high automation tends to hold better value, but if wear is high its value drops faster.

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Inspection Worksheet (Sample)

You may wish to use or adapt the following:

Item	Pass / Fail	Comments
Model & serial number match
Bar capacity confirmed		32 mm version
Spindle speed & condition		Run-out within tolerance
Sub spindle function
Gang tool post condition		No chatter/backlash
Live tooling spindles		Noise, balance, vibration check
Bar loader (FMB 3-38)		Feed, sensors, clamps functioning
Coolant & chip management		Clean sump, functioning filters
Control panel & CNC		No fault history, interface good
Electrical cabinet		Wiring condition, drive status
Maintenance history		Service records provided
Floor/load requirements		Our facility capable?
Tooling/collets included?		Check included tooling
Spare parts availability		Key parts catalogue still supported
Installation & rigging cost		Transportation, leveling, connections
Warranty or inspection clause		Provision for post‐move test run

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Final Recommendation

If after inspection the machine checks out (good condition, low wear, functioning loader, tooling included, documentation complete) then the D25-1M8 + FMB bar loader represents a very capable production asset for small diameter/high complexity parts. On the other hand, if you find major wear in the sliding mechanisms, live tooling dysfunction, inconsistent bar feed, missing service records or questionable automation condition — then either negotiate a substantial price reduction or consider a newer machine.

Before purchase, insist on a working demo under load (with representative parts) and ideally a short time guarantee (e.g., 30 days or limited warranty) especially given the complexity of this machine.