Describe the custom part and order size
Low volume custom machining can refer to different quantities and part types. Provide the actual number of parts, part number, current drawing revision, model, material, and finish. State whether the order is a one-time build or part of a planned series of releases.
Highlight the features that make the part custom
Identify unusual interfaces, pockets, bores, threads, mounting features, or other geometry that affects fit or assembly. Mark the datums and critical dimensions. Include a mating reference when it helps explain the design intent.
Clarify setup and quote assumptions
Ask whether programming, setup, tooling, inspection, secondary operations, or packaging are included. A different quantity or drawing revision may change the quote, so request clear assumptions and exclusions for each order.
Set acceptance without over-specifying
Identify the dimensions and records required to accept the custom part. Use the drawing standard for general dimensions unless the design needs additional control. Route any material or geometry alternative through the responsible design authority.
Plan repeat work separately
If a later release is expected, provide the anticipated quantities and schedule while asking the supplier to confirm each projectâs availability. Keep future orders tied to the approved revision and documented scope.