Critical Spares List for Steel Plants and Rolling Mills
How to build a critical spares list by unit, ranked by stoppage cost and lead time.
A single missing part can stop a mill or a furnace for days. A short, agreed critical spares list for each unit is one of the cheapest ways to protect output. Here is how to build one.
1. List the units and their drives
Start with a simple list of each unit: furnace, fan, pump, crane, conveyor, roll stand, gearbox. For each, note the drive: motor, coupling, gearbox, bearings and seals. Photograph nameplates while the machine is accessible.
2. Rank by cost of stoppage and by lead time
Mark which items would stop production if they failed, and how long it takes to get each one. Items that are both critical and slow to arrive go on the list first. Fast, everyday items can be bought as needed.
3. Record exact part numbers
Write down the full bearing designation with suffix, the belt and chain codes, the coupling size and the seal dimensions. Where a part has no number, record the dimensions and the machine position. A clear record saves hours during a breakdown.
4. Agree stock levels and storage
Decide how many of each part to hold. Store bearings in original packing, flat and clean, away from moisture. Rotate stock so the oldest goes first.
5. Review before each shutdown
Before a planned shutdown, check the list against what you plan to replace. Order early enough for the lead time and update the list after each failure.
Key Takeaways
- Build the list by unit and drive
- Rank by stoppage cost and lead time
- Record full part numbers and photos of nameplates
- Review before every shutdown
This article is general guidance. For a recommendation for your own application, contact our engineering team. Steel plant bearings and spares →