1. Typical Specifications (Benchmark Expectations)

While I could not find a public spec sheet specifically for UCK 225-3200, you can infer approximate benchmark ranges based on comparable SAFAN / UCK machines and press brake norms:

Parameter	Expected / Approximate Value	Notes & Assumptions
Bending length (beam width)	~ 3,200 mm	Based on the “3200” in the model name
Capacity / force	225 tonne (≈ 2,208 kN)	The “225” designation
Throat depth	~ 300 to 400 mm (or more)	Should suit your bending needs
Stroke / ram travel	~ 150 – 250 mm (or more)	To allow full bending flexibility
Back gauge travel / depth	At least 500 mm (ideally more)	For deep part bending
Hydraulic pump / motor power	~ 30-50 kW (or as required for 225 t)	Depends on the size of hydraulic system
Machine footprint / weight	Several tons; footprint perhaps ~4 m × 2 m or more	For transport and foundation planning
Control / CNC option	Possibly older CNC module (e.g. ESA, Safan’s own, or retrofit)	For bending programs, crowning, etc.

These are ballpark figures. The crucial point is: any used machine should come reasonably close to these, or deviations must be explained and acceptable in terms of use-case and cost.

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2. Technical Inspection & Purchase Checklist

Below is a detailed on-site inspection and test checklist tailored to press brakes, especially the SAFAN UCK series.

2.1 Structural & Mechanical Integrity

1. Frame, bed, uprights & crossbeam
   • Inspect for cracks, weld repairs, deformation, bending of uprights or cross-structure.
   • Use straightedges, test bars, and feeler gauges to check flatness of bed surface and parallelism of ram slide.
   • Check for corrosion or damage, especially around corners and large cuts.
2. Ram / slider / guide ways
   • Observe wear marks, scoring, pitting, signs of metal-to-metal contact or misalignment.
   • Check lubrication paths (oil channels, pads, bushings) for blockage or starvation.
   • Move the ram up and down manually (or via hydraulic slow mode) and observe binding, uneven movement, or “sticking” zones.
3. Hydraulic cylinders & seals
   • Inspect cylinders, piston rods, seals, and connections for oil leakage, damage, or scoring.
   • Extend and retract the ram fully and watch for leaks or irregular motion.
   • Check cylinder end caps, ports, and piping for integrity.
4. Back gauge / positioning systems
   • Inspect the back gauge axes, guides, carriages, lead screws or ball screws, and keyways.
   • Check for backlash, positioning errors, binding, or misalignment.
   • If the back gauge is CNC-driven, test motions and repeatability.
5. Tools / tooling platen, die holders, clamps
   • Check the top tool mounting platen for wear, flatness, and mounting accuracy.
   • Inspect clamping systems or tool holders; see if required tooling is included.
   • Test whether the tooling clamping is firm, symmetric, and reproducible.
6. Ram / beam alignment & parallelism
   • Use test indicators to check that the ram is parallel to the bed across its stroke, especially near the ends.
   • Measure at multiple points along the beam width for tilt or skew.

2.2 Hydraulic System & Power & Auxiliary Systems

1. Hydraulic pump, motor, reservoir
   • Inspect the pump, motor, hoses, fittings, and reservoir. Check for leaks, damage, or signs of overheating.
   • Look inside the reservoir (if possible) for sludge, metal particles, or contamination.
   • Check filters, strainers, and whether they have been regularly changed.
2. Valves, proportional valves, flow control & pressure regulators
   • Test control valves, relief valves, proportional controllers, and see whether they operate smoothly.
   • Verify pressure settings, whether they hold under load, and no drifting or creeping.
3. Oil condition & filtration
   • Request the hydraulic oil sample (if possible) and inspect clarity, presence of metal particles, coloration, contamination.
   • Check the condition of filters, filter elements, bypass valves, and whether maintenance was consistent.
4. Cooling / oil heat exchanger (if present)
   • If the machine has an oil cooler or heat exchanger, inspect its condition, clearance, fan, fluid paths, and cleanliness.
5. Electrical motor & drives for pump
   • Inspect the motor powering the pump(s). Run the motor under no-load and load (if possible) to see if it holds speed, draws current consistent with spec, and doesn’t overheat.

2.3 Electrical / Control / CNC & Safety

1. Control panel / CNC / interfaces
   • Power up the machine control (if CNC-equipped). Check display, interface, parameter access, menus, and diagnostics.
   • Look at control program backups, memory, error logs, and whether the control is intact and original.
   • If it’s a manual or semi-automatic hydraulic press, check any circuitry, limit switches, and control relays.
2. Electrical wiring & cabinet
   • Open the control/electrical cabinet and inspect for burnt wiring, overheated connectors, capacitor bulging, dust or moisture ingress.
   • Check cable routing, wire labeling, insulation integrity, and shielding.
3. Safety interlocks, doors, guards, emergency stop (E-stop), limit switches
   • Test that door guards, safety screens, interlocks, and E-stop circuits work reliably (i.e. machine stops when guard opened).
   • Check limit switches for ram travel, back gauge limits, and ensure their proper wiring and operation.
4. Sensors and feedback
   • If the machine uses position sensors (linear scales, limit sensors), verify their correct functioning, absence of stiction, and signal integrity.

2.4 Functional Tests & Bending Trials

1. Test cycle run / no-load motion
   • Operate the machine through full stroke under light or dummy load (no sheet), check for smooth motion, noise, vibration, any binding.
   • Cycle multiple up-down runs and gauge consistency.
2. Simple bend test with sample material
   • Bring a sheet piece (of material you’ll commonly process) and perform straightforward bending tasks.
   • Measure bend angle accuracy, repeatability, flatness, spring-back compensation, and gauge whether the machine can reach set angles consistently.
   • Test across the full bending length (at edges and center) to see if there is variation or sag.
3. Gauge back gauge accuracy
   • Program back gauge positions, move to positions, bend, and measure whether dimensions are correct.
   • Repeated cycles to see if drift or wear manifests.
4. Load stress test
   • Perform longer runs (many cycles) under full load conditions. Monitor hydraulic system temperature, pressure stability, oil behavior, deformation or drift in angles or positioning.
5. Angle repeatability / crowning test
   • If the press has crowning (mechanical or electronic), check whether crowning adjustment works and improves angular consistency across the beam width.
   • Test bends of identical parts in different positions and see deviation in angle / dimension.

2.5 Documentation, History & Spare Parts

1. Serial numbers, build documentation, origin records
   • Verify the machine serial number, build year, factory origin, and assembly location (Netherlands).
   • Ask for original design specs, acceptance test reports, and as-built drawings if available.
2. Maintenance / service / repair history
   • Request records of hydraulic system servicing, oil changes, parts replacement, alignment recalibrations, repairs, component overhauls.
   • Note gaps in records or long periods of neglect.
3. Spare parts / tooling / accessories availability
   • Confirm whether key parts (hydraulic valves, seals, cylinders, pumps, dies, clamping systems, control components) are still obtainable in your country or via suppliers.
   • If the machine used non-standard parts or proprietary components, check their cost and lead times.
4. Tooling, dies, clamping systems included
   • Determine if the purchase includes required dies, tools, clamps, tool sets. If not, estimate the cost.
   • Check included fixtures (if any) and their condition.
5. Warranty / acceptance period
   • If possible, negotiate a conditional acceptance period or performance guarantee (e.g. must produce correct bend angles on test material).
   • Get in writing responsibilities and what happens if performance is subpar.

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3. Risk Factors & Red Flags to Avoid

When dealing with used press brakes, particularly older hydraulic ones like the SAFAN UCK, watch out for these red flags:

• Hydraulic leaks or oil contamination — could indicate worn seals, cylinder wear, internal damage.
• Irreversible structural damage — cracked frames, welded repairs poorly done, twisting or sagging.
• Worn or misaligned guideways — will degrade angle accuracy across the beam.
• Cylinders with scoring, worn rods, or poor seals — may leak or lose stiffness under load.
• Weak or failing hydraulic system (pump, valves, regulators) — inability to hold pressure or drift under load.
• Non-functional or degraded control / CNC units — missing parameters, corrupted backups, locked control features.
• Safety safeguards disabled or removed — risking operator safety and regulatory compliance.
• Missing or obsolete parts — inability to source replacements for valves, seals, electronics.
• Lack of documented maintenance / long neglected periods — suggests deferred repairs and hidden wear.
• Ram / beam misalignment or skew — difficult or impossible to correct on-site.
• Back gauge failure or excessive backlash — making dimensional bending unreliable.
• Refurbishment by unprofessional parties — cosmetic fixes hiding serious mechanical flaws.
• No trial or test bending allowed by seller — you should always test before committing.

If you spot one or more of these, either require a price discount or walk away, unless you have deep resources to refurbish.

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4. Acceptance Criteria & Decision Rules

Before purchase, define a clear set of acceptance metrics you will require. Examples:

• The press must achieve target bend angles on your test material within your tolerance (e.g. ±0.2° or better).
• The ram must move smoothly over full stroke with no binding or skew and with acceptable parallelism to bed.
• Back gauge must position to within your dimensional tolerance (e.g. ±0.5 mm or tighter).
• Hydraulic pressure must hold under load, with minimal drift, and oil temperature and stability must be acceptable over continuous cycles.
• Safety interlocks, limit switches, guards must function properly.
• The seller should provide full documentation (drawings, control files, maintenance records) and tooling (or clarity about what is missing).
• Spare parts list must be available, with confirmed suppliers.
• The total cost (machine + transport + repair/refurb + tooling) must leave you margin vs new or better used machines.
• Insist on a test period / conditional acceptance after installation.

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5. Suggested Acquisition Workflow (Step by Step)

1. Remote Pre-screening
   • Request photos (interior, hydraulic parts, control panels, frame, beam).
   • Ask for serial number, build year, documentation, hydraulic schematics, tooling pictures.
   • Request a video of bending cycle or hydraulic ram movement.
2. On-site Mechanical & Structural Inspection
   • Follow the structural & mechanical checklist above with straightedges, test bars, visual checks.
   • Bring measurement tools and indicators.
3. Hydraulic & Auxiliary Systems Inspection
   • Examine pump, valves, seals, oil condition, fittings, cooling, hoses.
   • Ask seller to run the machine and show hydraulic pressure curves, temperature rise, and gauge consistency.
4. Electrical & Control Inspection
   • Open control cabinet, examine wiring, drives, relays, connectors, insulation.
   • Power up the control, check interface, modes, memory, error logs.
5. Test Bending Trials
   • Use sample sheet(s) to perform bending cycles — simple bends, multiple positions along the beam.
   • Measure angles, repeatability, flatness.
   • Test back gauge positioning, run cycles with varying positions.
6. Thermal Load / Stress Test
   • Run many cycles over extended period under load and watch for pressure drift, heating, oil behavior, variation in angle.
7. Evaluation & Negotiation
   • List all deviations, repair/ part replacement needs, missing tooling, control issues.
   • Get quotes for refurbishing (hydraulic overhaul, seal kits, control repair).
   • Adjust offer accordingly or request seller to fix critical issues.
8. Contractual Safeguards
   • Include acceptance clauses, hold-back portions of payment, guarantee periods, test performance commitment.
   • Ensure full transfer of documentation, control files, drawings, tooling, spares list.
9. Transport, Installation & Commissioning
   • Plan safe rigging, foundation, leveling, alignment of frame and beam.
   • After installation, repeat bending trials, calibration, and final validation.