10/10/2025 By CNCBUL UK EDITOR Off

Technical Evaluation Guide: How to Identify a Quality Used, Secondhand, Pre-Owned, Surplus Amada HDS 1303NT CNC Press Brake 143 Tonnes made in Japan

Here is a Technical Evaluation Guide / Checklist to help you assess the condition and quality of a used / surplus Amada HDS 1303NT (143-ton, down-acting servo/hydraulic) press brake (made in Japan) before purchase. Use this to spot hidden issues, quantify wear, and negotiate with confidence.

I. Know the Baseline / Specs
First, know the factory specifications (or typical ranges) so deviations become red flags. Some key specs of the HDS 1303NT / HDS-NT series are:

143 tons (≈ 130 metric tons) bending capacity
Bed / ram (bend) length ~10 ft (≈ 127 in)
Distance between frames ~106.3 in
Ram stroke ≈ 7.87 in
Open height (without tool holders) ~19.7 in
Ram repeatability ±0.00004 in
Backgauge travel: ~27.55 in
Hybrid (servo + hydraulic) drive, CNC backgauge (5+ axes) and AMNC-PC control system

Use those as reference checkpoints: if your candidate machine is far off in these areas, that signals potential issues.

II. Preliminary / Documentation Review

Before physical inspection, collect as much documentation and history as possible. A well-documented machine is safer.

What to Request	What to Look For / Why It Matters
Nameplate, serial number, build year, origin	Confirms model, variant, and production batch.
Original manuals, parts lists, hydraulic & electrical schematics	Essential for repair, parts ordering, and understanding internal systems.
Service / maintenance logs	Frequent preventive servicing (oil changes, filter replacements, cylinder checks) is a good sign.
Replacement history or repair records	E.g. if cylinders, pumps, or valves have been replaced or rebuilt.
Usage profile (hours, production types, material thickness ranges)	Helps you estimate wear or stress on components.
Spare tooling, dies, backgauge fingers, spare parts included	Increases value and lowers future downtime.
Warranty / return or “as-is” terms	If no recourse, you bear all risk — more reason to inspect thoroughly.

If the seller is unwilling or unable to provide decent documentation, treat that as a red flag.

III. Visual / Structural Inspection (Machine Off / Cold)

Examine the machine closely for signs of obvious wear, damage, or neglect.

Frame, Bed & Structure

Inspect the main frame, uprights, bed, and side columns for cracks, weld repairs, distortions, or bending. Structural issues are critical.
Check for alignment / squareness of frame surfaces, especially around the ram guides and frame uprights.
Look for signs of foundation shimming or excessive leveling adjustments, which may indicate the machine was twisted or misaligned.
Examine surfaces of ram guides, beam, and the mating faces for wear, scratches, corrosion, or scoring.

Ram / Upper Beam & Cylinder Mounts

Inspect the upper beam faces and the ram surface; look for wear, pitting, scoring, or corrosion.
Check cylinder mounting area: whether bolts are tight, whether actuators or links are bent or loose.
Inspect the seal areas, structural supports, and internal joints for signs of leakage or damage.

Tooling Mounting Surfaces, Punch / Die Areas

Look at the punch / die holder surfaces, tool seating surfaces: are they even, not gouged or dented?
Inspect the ram tip / tool interface: wear, burrs, or misalignment can lead to inaccurate bending.

Backgauge & Axis Assemblies

Examine backgauge arms, fingers, rails, carriages, and guideways. Look for wear, play, bent fingers, damaged rails.
Check rails and guides for scoring or scratch marks, and whether lubrication lines/ways are intact.
Inspect the lead screws, servo motors, couplings, belts, or rack systems (as applicable) in the backgauge axes.

Hydraulic Components, Hoses & Piping

Inspect all visible hydraulic lines, hoses, fittings, valves, manifolds: look for leaks, corrosion, abrasions, kinks.
Check pump(s), reservoirs, filters, cooling lines: cleanliness, fluid level, and leaks.
Inspect cylinder rods for corrosion, pitting or scoring, and seals for leakage.

Control Enclosure, Wiring & Electronics

Open the electrical cabinet (if permitted) and inspect wiring, terminal blocks, relays, capacitors, PCBs: look for burned insulation, corrosion, evidence of overheating, water ingress.
Check cable carriers, wiring harnesses, and flex cables for wear, chafe, or broken shielding.
Examine motor and drive enclosures for overheating signs or component replacements.

Cleanliness, Corrosion & General Condition

A machine that is well maintained tends to be cleaner; heavy accumulation of dust, sludge, chips or oil suggests neglect.
Inspect internal compartments and underside for corrosion, coolant or hydraulic fluid residue, or signs of flooding.
Look for non-OEM modifications, welded patches, or areas that seem “touched up.”

Photograph all critical areas (ram face, backgauge, cylinder mounts, control cabinet, hydraulic lines) for reference.

IV. Mechanical / Motion & Functional Testing

If allowed, power the machine and run preliminary functional tests to assess dynamic behavior.

Ram Motion, Smoothness, and Accuracy

Move the ram up/down (approach, bending, return) at slow and moderate speeds. Listen & feel for binding, jerks, vibration, or stuttering.
Check whether the ram motion is smooth across the travel, including near the ends.
Reverse direction and test for backlash or hysteresis—you may feel a dead zone or lag.

Cylinder Action & Hydraulic Integrity

Extend/retract cylinders slowly and monitor for leaks, cavitation noise, pressure drops, or hesitation.
With no load, maintain a position and see if the ram drifts (leakage or seal failure).
Under light load, see if the motion remains stable without sudden deviations.

Backgauge Movement & Multi-Axis Behavior

Command the backgauge axes (X, Y, Z, R, etc.) to move through their full range. Check for smoothness, consistency, and any binding.
Reverse direction in each axis and check for backlash or play.
Program a small movement sequence (if control allows) and observe axes working in concert.

Tool / Ram Tilt / Crowning & Compensation (if equipped)

If the machine has ram tilt, crowning, or compensation features, test their operation.
Adjust tilt or crowning commands and see if the machine responds predictably and cleanly.
Observe how the machine handles compensation commands (does it move smoothly, or is there lag or instability?).

Homing, Reference & Limit Switches

Initiate the homing / referencing cycle and check for repeatability.
Jog axes toward end positions and verify that limit switches / safety stops / soft limits engage reliably.
Ensure no crashes into hard mechanical stops during these tests.

Test Bend / Load Simulation (If Safe)

If permitted (and safe), perform a light bend test on a thin piece of material (e.g. mild steel blank). See how the ram behaves under small load.
Observe the accuracy of the final angle, whether bending is uniform across the width, and whether there’s backlash or spring-back deviation.
After bending, inspect tool surfaces, tool seating, and whether any part of the machine shifts or acts unstable.

V. Accuracy / Calibration / Measurement Tests

To quantify machine condition, perform measurement tests (if you have tools).

Backlash measurement: Use dial gauges to measure backlash in each axis (ram, backgauge X, Y, Z). Compare with acceptable limits.
Repeatability / reversibility: Move to a position from positive direction, then reverse, and return—check deviation.
Ram parallelism / squareness: Across the ram width, measure whether the ram is parallel to the bed or deviations exist.
Angle accuracy / flatness: After test bends, measure angles, surface flatness or uniformity across the length.
Thermal drift test: Let the machine warm under idle or motion, then re-measure a known reference to see drift.
Backgauge positioning accuracy: Command positions and measure actual finger positions with gauge or scale.

Compare measured deviations to what might be reasonable for a machine of this class (e.g. ±0.001 in or better in many axes) and compare to the original Ram repeatability spec of ±0.00004 in as a baseline.

VI. Wear & Component Lifespan Assessment

Your goal is to estimate how much life remains in key components:

Cylinders & Seals: If cylinders show wear, pitting, or leakage, seal replacement or cylinder rework can be costly.
Hydraulic pumps, valves & accumulators: Worn pumps or flawed valves degrade performance and accuracy.
Guideways / rails in backgauge / ram mechanisms: Excess wear or scoring suggests future rebuild needs.
Backgauge screws / drives: Worn screws, couplings, or belts reduce precision.
Control & electronics: Obsolete or heavily modified control boards may be difficult to replace in future.
Tooling seating surfaces & interfaces: Wear in the punch / die seating surfaces compromises bending accuracy.
Structural fatigue / cracks: any sign of metal fatigue or cracks in structural areas is highly costly to repair.

VII. Hidden Risks & Red Flags / Deal-Breakers

Be alert to these warning signs — presence of several may mean the machine is too risky.

Major cracks, weld repairs, or distortion in frame, bed, or uprights.
Excessive wear, scoring, or corrosion on ram, guide surfaces, backgauge rails, or axes.
Ram vibration, noise, unstable motion, or excessive backlash.
Hydraulic leakage, cavitation noise, or drift under static load.
Binding or erratic movement of backgauge axes.
Ram tilt, crowning, compensation features not functioning or erratic.
Frequent error codes, alarms, or control faults.
Electrical panel damage, overheated wiring, corrosion, or tampering.
Missing or damaged covers, guards, or protective components.
Non-OEM modifications, jury-rigged repairs, or undocumented changes.
Seller refuses live tests, motion tests, or test bending.
Poor cleanliness, internal flooding, heavy sludge, or neglected maintenance.
No spare parts, obsolete control, or limited service support in your region.

VIII. Practical / Commercial Considerations

Beyond pure technical inspection, consider these real-world factors before finalizing a purchase.

Transport, rigging & installation: This machine is heavy; plan for cranes, foundations, leveling, anchoring.
Commissioning / calibration: Expect to perform alignment, calibration, and test bending after installation.
Spare parts lead times / cost: Cylinders, pumps, valves, control boards, sensors, backgauge components, etc. may be imported from Japan and expensive or slow to get.
Operator training & maintenance skills: Make sure your staff are familiar (or can be trained) with AMADA control, hybrid servo/hydraulic systems, and maintenance procedures.
Software / control version / licensing: Ensure the control is not outdated or locked; check whether software upgrades are needed or available.
Resale / residual value: AMADA machines tend to retain value if well maintained; but condition, service history, and control version matter.
Acceptance / trial period: Negotiate for a short trial or acceptance testing where you can reject the machine if test results are unsatisfactory.