Resistance spot welders: record tooling and cooling requirements
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A resistance spot welder needs a description of its fitted tooling and supporting services as well as its electrical rating. Record the arms, electrode holders, controller and cooling arrangement. State which equipment is included and which services the buyer would need to provide.
Two machines with similar headline ratings can arrive with very different packages. That difference matters before either buyer or seller commits to a lot description.
TECNA's 6074 specification illustrates the range of details involved: it distinguishes several electrical measures, electrode force and water-cooled components. This is a reason to use the matching machine documentation, not to apply one model's figures to another.
Describe the installed version
Start with the manufacturer, full model, serial number and control identity. Photograph the whole machine and accessible markings. Keep original specification information separate from later modifications or replacement parts.
Record the fitted arms and tooling by identifier where possible. Include spare arms, electrode holders and other accessories only when they belong to the seller and form part of the agreed package.
If the maker gives a throat dimension or another working-envelope measure, quote the documented value for that arrangement. Do not assume the available space is the same with every optional arm or fixture.
A photograph can help a buyer recognise the arrangement. It cannot confirm the condition of internal components or the quality of welds it will produce on a future job.
Separate equipment from services
Use two sections in the inventory:
| Supplied equipment | Information needed |
|---|---|
| Welder and controller | Matching identities and current configuration |
| Arms, holders and electrodes | Fitted and spare items, quantities, readable references |
| Dedicated cooling unit, if included | Model, serial number, records and known faults |
| Fixtures and controls | Explicit inclusions, ownership and evidence of their relationship |
| Documents | Manuals, service reports and inspection information |
| Required or existing site service | Question for the manufacturer or specialist |
|---|---|
| Electrical supply | What requirements apply to this exact version? |
| Cooling supply | Is the arrangement self-contained, dedicated or shared? |
| Compressed air, where applicable | What documented service is required? |
| Installation and safeguards | Which records and assessments apply to the installed arrangement? |
The second table is a list of questions, not a connection specification. A buyer should obtain installation advice for its site.
If a separate chiller is part of the offer, the process chiller handover guide helps define the records and specialist work involved. Do not promise to include a shared cooling system before checking what else it serves.
Keep useful tooling together
An identified tooling selection may make the offer easier for a buyer to assess. Separate accessory lots can suit surplus or duplicate items, but should not leave the machine description implying a package that is no longer available.
Jigs made for a customer's component need their own release decision. The welding table and fixture register helps distinguish business-owned equipment from customer property and restricted drawings.
There is a related packaging task when selling MIG sets, although the technical components differ. In both cases, the offer should remain consistent between the photographs, inventory and collection list.
What can a trial prove?
A dated trial can describe an observed operation on a stated sample. It does not automatically establish weld quality for another material combination or production duty.
Agree the purpose and responsibility for any demonstration through the fabrication demonstration guide. If formal quality evidence exists, identify the document and its scope instead of paraphrasing it as "fully tested".
Known faults and missing records should remain visible. In Great Britain, HSE's second-hand machinery guidance explains the responsibilities around supplying used machinery; the description should not treat a sale label as a substitute for addressing them.
Give UK Auction Group's manufacturing asset service the installed-equipment list and service questions when discussing the sale. Other workshop preparation guides sit in the fabrication and welding 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.