Industrial spare parts RFQ checklist for faster technical sourcing

1. Record the complete manufacturer information

Provide the manufacturer's full name and the complete product reference. Include spaces, dashes, slashes and suffixes exactly as they appear on the nameplate.

Attach a clear photograph of the entire nameplate rather than only typing the number. If more than one label is present, photograph all of them. A serial number, production date, revision, hardware version or firmware version may distinguish products that otherwise look identical.

If the machine builder uses a separate internal code, state both references and explain which one appears on the component.

2. Show the component and its connections

Photograph the component from several angles in good light. Include:

• the front, rear and both sides;
• electrical connectors and terminal markings;
• shafts, flanges, mounting holes and brackets;
• hydraulic or pneumatic ports;
• cable entries and plug orientation;
• any damage or missing parts;
• the surrounding assembly where this helps explain the installation.

Place a ruler in the image when dimensions are difficult to describe, but also provide the actual measurements separately. Perspective in a photograph can be misleading.

3. Explain where and how it is used

State the machine manufacturer, model, year and function if known. Explain what the component controls or drives, what failed and whether the machine has been modified.

The operating context helps determine which parameters are critical. For example, a sensor used for product detection may require a particular sensing principle and response time. A motor in a washdown area may need a defined protection rating and suitable materials. A control module may depend on a specific network or software generation.

Do not rely on the supplier to infer these requirements.

4. List the technical parameters

The relevant parameters depend on the product category.

For electrical and automation components, include supply voltage, current, frequency, output or signal type, communication protocol, number of channels, connector type and software or firmware information.

For motors and drives, include power, voltage, frequency, speed, duty, mounting arrangement, frame size, shaft dimensions, brake, encoder and protection rating.

For hydraulic and pneumatic items, include pressure, flow, medium, port size, seal material, actuation and operating temperature.

For mechanical components, include dimensions, tolerances, material, load, speed, lubrication and the associated assembly.

For process equipment, include the medium, temperature, pressure and any hygiene, food-contact, hazardous-area or material certification requirements.

Mark each parameter as one of the following:

• mandatory;
• preferred;
• unknown and requiring clarification.

This makes it easier to evaluate alternatives without silently relaxing an important requirement.

5. State which sourcing route is acceptable

Tell the supplier whether the enquiry is limited to the exact original item or whether other routes can be considered:

• same manufacturer and exact reference;
• official manufacturer successor;
• technically comparable alternative, subject to approval;
• repair of the existing unit;
• custom manufacture of a mechanical item, based on drawings and verification;
• replacement of a complete assembly or subsystem.

If an alternative is acceptable, name the person who will approve it. A supplier can prepare a comparison, but the responsible technical party must decide whether the proposed solution is suitable for the machine and application.

6. Define acceptable condition

Specify whether the item must be factory-new or whether new old stock, refurbished or used equipment may be considered.

For non-new stock, request current photographs, the source, inspection or test information, warranty terms and a clear description of what is included. For electronic products, storage history and age may be relevant. For safety-related applications, non-new equipment may be unsuitable regardless of price.

Do not compare offers until the condition and included documentation are understood.

7. List the required documents

Typical requirements may include:

• manufacturer datasheet;
• certificate of conformity;
• inspection or test report;
• calibration certificate;
• material certificate;
• country of origin;
• serial-number photographs;
• packing list and dimensions;
• export or transport information relevant to the item.

Ask for these documents with the quotation if they are part of the purchasing decision. Requesting them after payment can cause avoidable delays.

8. Provide the commercial and delivery facts

Every enquiry should state:

• company name and B2B contact details;
• required quantity;
• delivery city and country;
• target delivery date;
• preferred currency where relevant;
• any required quotation validity;
• whether partial quantities are useful;
• any packing, transport or insurance requirements already known.

An urgent request should include the date by which the offer is needed and the date by which the machine must be operational. These are different deadlines.

For international projects, the final transport route, Incoterms, import responsibilities and compliance requirements should be agreed for the specific goods and destination. They should not be assumed from a previous shipment.

9. Identify a technical contact

Give the supplier direct access to someone who can answer technical questions. Long email chains through several intermediaries increase the risk that a question loses context.

If direct contact is not possible, collect the technical questions in one document and record each confirmed answer. The same record will be useful when evaluating competing offers.

10. Compare offers on the same basis

Create a simple comparison covering:

• exact item or alternative;
• manufacturer and full reference;
• condition;
• quantity and confirmed availability;
• included documents;
• warranty;
• lead time;
• delivery terms;
• exclusions and technical deviations.

The lowest price is not necessarily the lowest-risk option. A quotation with no proof of condition, no traceability or an unresolved technical deviation should not be treated as equivalent to a verified offer.