Service & spare parts

Spare parts management in machine building: from guesswork to one-click requests

Spare parts keep machines running – and are an important line of business for many manufacturers. But it often fails at the simplest step: clearly identifying the right part.

Updated: 19 October 2026 · 7 min read

What is spare parts management?

Spare parts management covers everything needed so customers get the right spare part at the right time: defining and marking parts, providing information, handling requests, planning stock and availability, and supplying parts throughout the machine’s lifecycle.

For machine manufacturers it has two sides: it is central to customer satisfaction – downtime costs your customers money – and at the same time a line of business that generates revenue over the machine’s entire service life.

Part types: spare, wear and consumable parts

TypeCharacteristicExamples
Wear partswear out predictably during intended usebearings, belts, seals, conveyor belts
Spare partsreplaced after a defect or damagemotors, sensors, deflection rollers
Consumablesused up during operationlubricants, filters, blades

A classification by criticality also pays off: which parts cause downtime if they fail? Customers should get a stocking recommendation for these.

The typical problems

  • Unclear identification: customers send photos, pictures of the rating plate or describe the part on the phone.
  • Wrong version: the parts list doesn’t match the design state of the machine at the customer site.
  • Outdated PDF lists: stored somewhere in a folder, not searchable and obsolete after the first change.
  • High query effort: service spends time researching instead of solving.
  • Wrong deliveries: wrong parts cost shipping, time and trust.

KPIs worth tracking

  • Handling time per request – from receipt to quote.
  • Share of unambiguous requests – with part number and machine reference, no follow-up needed.
  • Wrong delivery rate – wrong or unsuitable parts.
  • Spare parts revenue per installed machine – an indicator of aftersales customer loyalty.

The electronic spare parts catalog as the key

An electronic spare parts catalog solves the identification problem at its root: the customer sees their machine – in exactly the installed version – and finds the part in the 3D model, the BOM or via search. The request automatically contains part number, quantity and machine.

The data basis is what matters: if the catalog is generated from the same engineering data as the documentation, names, part numbers and item numbers match everywhere – and changes flow in automatically.

That’s exactly how proquodo parts works: one catalog per customer with their machines, 3D view with exploded view, one-click request list to your service team and white label in your branding.

5 steps to better spare parts management

  1. Mark spare and wear parts during design.
  2. Ensure unique part numbers across CAD, ERP and documentation.
  3. Link every machine shipped to its product version.
  4. Provide spare parts information digitally and per machine.
  5. Capture requests in a structured way and measure KPIs.

See proquodo live

In a personal demo we’ll show you how documentation and a spare parts catalog are created from your data.

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FAQ

FAQ

What is the difference between a spare part and a wear part?

Wear parts wear out predictably during intended use and are replaced regularly, e.g. bearings or belts. Spare parts are replaced after a defect or damage.

What are the benefits of an electronic spare parts catalog?

Customers identify parts themselves and unambiguously, requests arrive complete with part number and machine reference, and service avoids queries and wrong deliveries.

Does the catalog have to match the machine version?

Yes. Only if the customer sees exactly the BOM of their installed version is an error-free spare parts supply possible.

Documentation that keeps pace with your engineering.

Operating manuals, spare parts catalogs and more – automatically from CAD, PDM and ERP.