Sample orders when sourcing from India

When a sample earns its cost

A sample makes sense when fit, finish or function cannot be judged from a drawing, or when the part is safety-critical or expensive to get wrong. For a standard fastener in a known grade, it is usually just delay.

The question is not whether samples are good. It is whether this part, at this order value, needs one before production.

Prototype or production tooling

A hand-built prototype proves shape. A sample from production tooling proves the process. They cost different money and take different time, and confusing the two leads to a second round nobody budgeted.

Say which one you need. If the answer is a production sample, expect the tool to be made and paid for first, and expect the sample to arrive after the first articles come off it.

What you are actually paying for

A sample invoice usually carries four lines:

• The sample itself, sometimes at a higher unit rate than production.
• Tooling or setup, if the part needs it.
• Freight, which for a single part can exceed the part's value.
• Testing or measurement, if you ask for a report.

Brief the factory once

Send the drawing revision, the material certificate requirement, the finish, and the dimensions you will measure. If appearance matters, say which surfaces are visible and which are hidden.

One clear message beats five corrections, because the factory starts making the sample after the first one. Corrections that arrive on day three are often corrections that arrive too late.

Give feedback in numbers

'Does not fit' produces another guess. 'Bore is 0.15 mm under nominal, thread binds at 12 Nm, corner radius reads 2.8 mm against 3.0 on the drawing' produces a correction.

Send a marked drawing and a photo of the measurement, not only a photo of the part. Keep the tone factual. The goal is a second sample that passes, not a conversation about blame.

Keep a golden sample

Once a sample is approved, keep it, label it with the date and the drawing revision, and compare later batches against it. This one habit prevents most arguments about whether a finish has drifted.

If the sample was approved with a deviation, write the deviation down and attach it to the purchase order. Approvals given by phone call are how a defect becomes the standard.

Plan backwards from your line date

Tooling, sample, transit, feedback and a second sample can take six to ten weeks on a custom part. Work back from the date you need production, not from the date the budget was approved.

Simple machined parts can arrive in a week or two. Anything with a mould, a pattern or a die should be planned in months.