Digital Spare Parts Marketplace for Legacy Industrial Machinery
A marketplace connecting plants that need obsolete spare parts with vetted shops that can make them, with the CAD file, tolerances, and material already specified.
The problem
When an obsolete part fails, a maintenance manager has a physical sample and a stopped production line. They do not have a drawing, a material spec, or a supplier who will take a one-off job. They call around, get ignored by shops that want volume, and wait weeks. On the other side, small job shops have idle spindle time and would happily take a well-specified one-off, but they have no way to find these jobs and no patience for a customer who cannot supply a drawing.
Why now
Two things converged. The installed base of industrial equipment built in the 1980s and 1990s is now well past OEM support, and the small job shop sector has spare capacity and is actively hunting for work as traditional volume moves offshore or gets consolidated. What has been missing is the matching layer plus the missing information: the CAD file. Cheap scanning and CAD services now make it possible to supply the missing information as part of the marketplace itself.
Who pays
Two sides. Demand: maintenance and reliability managers at factories, utilities, mines, and food processors in the US, UK, Canada, and Australia. Supply: 3 to 40 person machine shops, fabricators, and additive bureaus with idle capacity in those same markets.
How it makes money
Take rate of 10 to 20 percent on part value, with typical orders from 500 to 15,000 USD. Additional revenue from a paid reverse engineering service when the buyer has no CAD file, at 800 to 3,000 USD per part, which is also the moat because it creates a file library you own.
Market & demand
Order-of-magnitude: industrial MRO spend across the four markets is in the tens of billions annually, with the obsolete and made-to-order slice a meaningful subset. A marketplace doing 20 million USD of gross merchandise value at a 15 percent take rate is a solid mid seven figure revenue business.
Digital inventory, meaning holding a file instead of a physical spare, is being pushed hard by both additive vendors and large asset owners who want to cut working capital tied up in slow-moving stock. Companies like Ivaldi and Spare Parts 3D have built businesses on exactly this premise, which validates demand while leaving the small and mid-size plant segment thinly served.
Verify before you commit:
- MRO spend estimates from industry reports and distributor filings such as Grainger and RS Group
- Unplanned downtime cost studies from Siemens and ABB
- Xometry and Hubs public materials on supplier network size and take rates
- Interviews with 20 maintenance managers about how they currently source obsolete parts
SWOT
Strengths
- Genuine two-sided need with idle supply on one side and urgent demand on the other
- The CAD file library becomes a compounding proprietary asset
- Downtime urgency means buyers are not price sensitive
Weaknesses
- Classic marketplace cold start problem in a slow-moving, relationship-driven industry
- Every transaction is bespoke, which resists automation
- Take rate pressure once buyers and shops know each other
Opportunities
- Own the file library and become the system of record for a plant's digital spares
- Add proactive digitization: scan critical spares before they fail
- Expand into additive-produced spares where the file is the whole product
Threats
- Disintermediation, which is the fundamental disease of every industrial marketplace
- Xometry or Hubs adding an MRO and legacy parts vertical
- OEMs asserting IP rights on parts still under protection
Competition & the gap
Xometry and Hubs for general on-demand manufacturing, Ivaldi Group and Spare Parts 3D for digital spares, industrial distributors like Grainger and RS for stocked parts, and the phone calls a maintenance manager makes today.
The wedge: General marketplaces require the buyer to arrive with a CAD file, which is exactly what an obsolete-part buyer does not have. Solving the missing-file problem inside the marketplace, via scanning and CAD, is the wedge that also produces the defensible asset: a proprietary library of digitized legacy parts.
Go-to-market
Do not build a marketplace on day one. Start as a concierge service: take the part, get it scanned, get it made, deliver it. Manually recruit 20 shops and 30 plants. Only build software once you know exactly which steps are painful. Focus on one vertical, for example food processing, where downtime cost is severe and equipment is old.
First 10 customers: Ask 30 maintenance managers a single question: what obsolete part have you struggled to source this year? Source those parts by hand through shops you have personally called. Charge full price. Every completed job proves the loop and adds a file to your library.
How to set it up
- 1Pick one vertical with old equipment and expensive downtime
- 2Manually recruit 20 job shops and additive bureaus and vet their capabilities and lead times
- 3Run 20 transactions entirely by hand as a concierge service with no software at all
- 4Add scanning and CAD reverse engineering as a paid step for buyers with no file
- 5Build the CAD file library and make it the thing buyers cannot leave behind
- 6Only then build the software layer for RFQ, quoting, and order tracking
How to validate it
Buyers returning with a second and third part, shops asking for more jobs from you, average time from request to delivered part falling, and buyers paying for proactive digitization of spares that have not failed yet.
Key risks
- Disintermediation is the existential risk: after one good job, a plant and a shop have every incentive to deal directly and cut you out, and your only defense is owning the file library and the workflow
- Marketplace cold start in an industry that moves on relationships and phone calls, not web forms
- IP exposure on parts still covered by patent or registered design, requiring a firm policy and the willingness to refuse work
- Bespoke transactions resist automation, so the business can stay stubbornly labor-heavy for years
Your moats
- A proprietary library of digitized legacy part files that gets more valuable with every job
- A vetted supplier network with verified quality and lead-time history
- Being the plant's system of record for digital spares, which is a workflow, not a transaction
Tools & inspiration
Companies in this space: Xometry, Hubs, Ivaldi Group, Spare Parts 3D, Grainger
FAQ
Found your idea? Here's how to build & launch it
The two steps most founders get stuck on, made simple.
Build your MVP without a developer
Form your US company
Not quite your fit?
Answer a few questions and we'll match you to vetted ideas for your budget, skills, and country.
Find my idea