How Much Does a Coil Line Rebuild Cost Versus New?

Four Cost Blocks in Any Rebuild Quote

A rebuild quote is only readable when it is split into four blocks. Most arrive as one lump sum, which is why two quotes for the same line can differ by a factor of three.

Mechanical refurbishment. Rolls reground or replaced, mandrel journals rebuilt, hydraulic cylinders resealed, and every bearing that has run 40,000 hours.

Electrical and control. This is the block that surprises buyers. A 2010 line with analogue drives and a relay cabinet cannot take a modern positioning system for the price of the drives alone.

Safety and CE. Light curtains, interlocked guards, two-hand control, a documented risk assessment, and a technical file a notified body will accept.

Installation and downtime. Rigging, foundations, alignment, and the output you lose while the line sits in pieces on the bay floor.

Only the first block is genuinely cheaper on a rebuild. The other three cost close to the same whether the frame is old or new, and that single fact explains most of the spread between quotes.

What the Frame Inspection Decides Before Pricing

A rebuild is an engineering decision before it is a commercial one, and the decision rests on the frame.

Three checks settle it. Side frame flatness within 0.15 mm over the full length, mandrel journal wear under 0.05 mm on diameter, and gearbox backlash inside the manufacturer's service limit.

If the frame has taken a hit — a coil dropped during loading, a jam that bent a roll shaft — the price climbs because the geometry has to be re-machined before anything bolts onto it.

Our own works has rebuilt frames from 1990s machines and scrapped others from 2012. Age was never the deciding factor; the inspection was.

Two measurements are worth taking yourself before the supplier arrives: frame flatness with a straightedge and feeler gauge, and journal diameter with a micrometer at two positions 90 degrees apart.

Ask for that inspection report as a separate document with photographs and measured values. A supplier who prices a rebuild without one is pricing a guess and will price the change order later.

Reading a Rebuild Quote Line by Line

Put the two documents side by side and mark every line that only one of them carries. The gaps are the comparison.

The last row is the one buyers consistently undervalue. Downtime is a real cost, and it is the line item where a new machine sometimes wins outright.

A rebuild that takes five weeks on a line producing 900,000 parts a year has already spent a large part of its saving before the first good part arrives.

Where the Money Moves After Year Three

Capital cost decides year one. Everything after that is decided by spares, energy and reliability.

A rebuilt line keeps its old field devices. Contactors, sensors and drives that were common in 2011 are now single-source items with four-week lead times and prices that reflect it.

On a line that runs 4,000 hours a year, one four-week outage costs more than the gap between a mid-range rebuild and a new machine.

Ask the rebuilder to price the five-year spares schedule separately. It is the only line item that shows what obsolete means in money.

Fill this table with your own numbers. The shape rarely changes, but the crossover point moves with your shift pattern and your scrap tolerance.

A two-shift plant on a stable product mix usually finds the crossover at year six or seven. A three-shift plant running high-strength steel often finds it at year three.

The Case a Rebuild Cannot Win

Rebuilds lose on three job profiles, and it is worth naming them plainly rather than pretending every old frame is a candidate.

The product has outgrown the frame. If the line was built for 2 mm and you now run 4 mm HSLA, no amount of refurbishment changes roll diameter or frame stiffness.

The rebuild will pass its acceptance test on thin strip and fail on the work you actually sold.

The control platform has no migration path. Some 2000s controllers are unsupported, so the retrofit becomes a full replacement inside an old frame — the worst of both prices.

The line is the bottleneck. When every week of downtime costs more than the capital difference, buying new is the cheaper decision even at a higher invoice.

One pattern worth naming: a rebuild that starts as mechanical work often becomes a control project once the cabinet is opened. Budget for that discovery rather than being surprised by it.

A rebuild quote that does not raise at least one of these three is a sales document, not an engineering one.

What to Write Into a Rebuild Contract

Four clauses keep a rebuild honest, and all four fit on one page of the purchase order.

• Acceptance at your site, on your strip and your die, not at the rebuilder's yard on a test piece.
• A spares list with manufacturer part numbers, so obsolete items are visible before the invoice rather than after.
• A defined downtime window with a daily penalty, because the schedule is the expensive part of the job.
• A flatness and feed accuracy figure with the test method written next to it, so the number has a meaning.

If the supplier will not sign the first and the last, the price is not the number you should be negotiating.

FANTY has quoted both routes for twelve years, across more than 200 installed lines in 60-plus countries, and the rebuild that works is always the one with a documented scope.

Specifications for a new line sit on our machine specification pages if you want a baseline to price against.

For the wider arithmetic — freight, duty, electrical hook-up and first-year spares — the coil line guide library prices each line item in turn.