Horizontal machining centres: keep track of pallets and tombstones
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Before offering a horizontal machining centre for sale, account for its pallets and the equipment mounted on them. A photograph of the machine alone leaves a buyer guessing about what will arrive with it.
The awkward items are often already somewhere else: a pallet waiting beside production, a tombstone in stores, or a fixture that still belongs to a customer. Start by mapping the actual package.
A pallet is the removable base that locates the workholding in the machine. A tombstone is a tower mounted on that base, providing faces for workholding. A job fixture locates and holds the particular component being machined. Those are separate layers, even when staff casually call the assembly a pallet. Haas's tombstone examples illustrate the distinction between the tower, its mounted vices and the supporting pallet.
Give every pallet and fixture a separate identity
Use existing asset numbers where they are reliable. Otherwise, assign temporary sale references that can be matched to photographs. The references help the catalogue; they do not replace manufacturer identification.
Keep the pallet, tombstone and job fixture as separate entries even when they are currently assembled. That makes it possible to record different owners or different inclusion decisions.
| Sale reference | Item | Associated equipment | Proposed treatment |
|---|---|---|---|
| P1 | Pallet currently in the machine | Tombstone T1 | Include, subject to identification check |
| P2 | Pallet beside the loading station | Fixture F7 | Pallet included; fixture ownership unresolved |
| T2 | Loose tombstone in stores | Pairing unconfirmed | Hold description until records are checked |
| F7 | Customer production fixture | Pallet P2 | Obtain written release or exclude |
| C1 | Clamps and loose fixture parts | Mixed | Sort into supported sets |
These are hypothetical references. The useful part is the separation of identity, association and sale treatment.
An owner who knows the workshop may consider the pairing obvious. The buyer, valuer and collection team will not have that background. A clear manifest avoids relying on memory at handover.
Check compatibility through records
Similar size does not establish that two pallets or tombstones can be used on the same machine. Ask for the relevant manufacturer documents, service records or a competent specialist's confirmation.
Where the manufacturer provides archived documentation, use the version that matches the machine. The Haas manual library is one example of a manufacturer maintaining machine and supporting-system documentation. It should be used for the relevant Haas equipment, rather than as a general compatibility authority for other makes.
If the pairing remains unverified, say so. A photograph and visible dimensions can support identification, but they should not become a claim that an item will fit.
The workholding guide covers matched chucks, jaws and fixtures in more detail. Its ownership questions also apply when a tombstone carries a customer's tooling.
Decide what production must retain
A sale package that removes a shared fixture too early can create a problem for the remaining machines. Ask the production team which pallets, clamps and fixtures are still needed, and until when.
Write the release date against the relevant item. Do not put one release date against the whole machine if part of the package remains committed to an unfinished job. The guide to selling a cell while production continues helps make those dependencies visible.
Where an accessory is shared, consider whether the proposed sale should exclude it or wait for its release. Avoid promising an equivalent replacement until the replacement has been identified and its suitability confirmed.
Compare complete packages
The comparison is not simply "more accessories equals a better price". Extra equipment can make a package more useful, but incomplete or unidentified sets can create additional questions. A particular buyer may already have suitable fixtures and want the machine alone.
Set out the alternatives in a form the valuer can assess:
- The machine with identified dedicated pallets and tombstones.
- The machine with a smaller agreed package.
- Separately described accessories whose compatibility and ownership are established.
Keep the stock of collets and toolholders separate in the inventory. It may be useful with the machine, but it answers a different set of compatibility questions.
HSE's second-hand equipment guidance is the reference for supply responsibilities in Great Britain. The manifest records the commercial package; it does not certify equipment as safe.
Send the proposed package and its unresolved items to UK Auction Group for a sale discussion. Start with the CNC sale-scope guide if the base machine package is still unsettled.
More preparation topics sit in the engineering and CNC hub.
Sources
This guide gives general information. Equipment-specific, legal, tax and safety decisions may need a qualified adviser or competent specialist. The guides do not promise sale prices, fees or results.