Answers · Updated 2026-10-31

How do I quote machining customer-supplied castings or forgings?

Your part priced in about 90 seconds, no account.

Add incoming inspection, datum and stock variation risk, first-operation allowance, and an explicit rule for bad blanks or rework.

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The direct answer

For 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining. State whether a bad blank is scrapped, reworked, or returned.

Test the decision against the shop evidence in this example: For 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining.

Carry the measurable input from the worked case into the estimator's notes: For 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining.

Evidence from a shop floor

Ten supplied castings with $95 inspection, $330 workholding/setup, $348.33 machining, $125 deburr/inspect, and $71 scrap allowance total $969.33 direct; at 25% markup the lot is $1,211.66. Run a pilot and convert to a repeat route only after actual yield and variation are known.

Keep the commercial decision tied to the evidence, including for 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining.

The handoff is complete only when the owner can restate the route without losing for 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining.

Build the quote route

Confirm casting revision, foundry records, stock allowance, datum strategy, inspection sample, rework authority, and replacement responsibility.

A useful review question is whether the current RFQ still matches this route: confirm casting revision, foundry records, stock allowance, datum strategy, inspection sample, rework authority, and replacement responsibility.

The next estimator should be able to challenge the assumption behind this route: confirm casting revision, foundry records, stock allowance, datum strategy, inspection sample, rework authority, and replacement responsibility.

Use the source notes to date the assumption and record why this route was selected: confirm casting revision, foundry records, stock allowance, datum strategy, inspection sample, rework authority, and replacement responsibility.

Release and learn

Castings and forgings vary by lot; a perfect CAM estimate does not remove blank risk.

If the buyer asks for a different outcome, explain the boundary in these terms: castings and forgings vary by lot; a perfect cam estimate does not remove blank risk.

Before changing the total, verify whether the caveat applies: castings and forgings vary by lot; a perfect cam estimate does not remove blank risk.

A customer-facing explanation should make the risk legible: castings and forgings vary by lot; a perfect cam estimate does not remove blank risk.

Close the loop by noting the evidence that would make this estimate obsolete: castings and forgings vary by lot; a perfect cam estimate does not remove blank risk.

Keep the commercial decision tied to the evidence, including for 20 castings, price receiving inspection and a 10% allowance for clean-up review separately from machining.

Price one of your own parts

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