Inspection Route
Follow the machine review in practical order
For buyers who already have a candidate machine, these steps help confirm identity, condition and running proof before payment or travel.
Step 01
Pre-check
Confirm the process requirement first
Before comparing price, confirm whether the used tension leveling line matches your material type, strip width, thickness range, flatness requirement, surface sensitivity and production speed.
- A line that works for one stainless steel or carbon steel application may not fit another project's strip tension and surface requirement.
Step 02
Pre-check
Check the supplied scope and machine layout
Confirm whether the equipment includes uncoiler, entry guide, entry S-rolls, leveling section, tension control, exit S-rolls, cleaning or auxiliary sections, recoiler, hydraulic station, electrical cabinet, spare rolls and drawings.
- A low-price used line can become expensive if key sections or control parts are missing.
Step 03
On-machine review
Inspect entry and exit S-roll condition
S-rolls are critical for strip tension stability.
- Check S-roll diameter, face width, roll surface condition, motor power, reducer condition, bearings, coupling, brake and whether the roll surface has scratches, dents or uneven wear.
- Poor S-roll condition may cause unstable tension or surface defects.
Step 04
On-machine review
Review leveling rolls and adjustment mechanism
Inspect leveling roll surface, roll diameter, bearing condition, backup support, adjustment mechanism, lubrication and visible wear.
- For used strip leveling equipment, roll surface condition and alignment are more important than appearance paint.
- Ask whether the line can demonstrate flatness improvement in a running video.
Step 05
On-machine review
Evaluate hydraulic and tension control systems
Confirm hydraulic station condition, oil leakage, pressure stability, cylinders, valves, tension feedback, sensors and whether the machine has stable entry and exit tension control.
- If the hydraulic or feedback system is incomplete, plan refurbishment before installation.
Step 06
Evidence and quotation path
Check electrical cabinet and drive system
Ask for PLC, HMI, inverter or DC drive condition, motor list, wiring label status, electrical drawings and cabinet completeness.
- Older used leveling lines often need electrical upgrades even if the mechanical sections are usable.
Step 07
Evidence and quotation path
Ask for a useful running video
A useful video should show strip feeding, entry S-roll movement, leveling section, exit S-roll movement, recoiling, speed stability and any visible vibration or noise.
- If the line is already dismantled, ask for previous running video, detailed photos and a complete parts inventory.
Step 08
Evidence and quotation path
Prepare inspection questions before inquiry
Send your material, thickness range, strip width, coil weight, target flatness, surface requirement, destination country and whether you need dismantling or installation support.
- Then ask the supplier to confirm current running status, included parts, known issues, inspection access and refurbishment options.
