Pump Housing RFQ Checklist for Cast + CNC Aluminum Parts

Pump housing quotes often look comparable on casting price but differ in machining scope, sealing assumptions, leak-test requirements, and inspection records. Use this checklist before supplier comparison.

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RFQ evidence paths

A356-T6 pump housing RFQ Pump casing pressure-tight RFQ Pump casing product proof RFQ readiness check General quote readiness checklist Supplier capability sheet Quote readiness checklist

Minimum Package

What to include before asking for price

2D drawing with revision and critical dimensions

STEP or 3D model when available

Alloy, temper, or mechanical requirement

Annual volume or batch quantity

Casting route preference or open-process note

CNC machining scope and surface finish

Leak-test or pressure-test requirement

Inspection records: CMM, material certificate, FAI, PPAP checklist, or buyer format

Quote-Sensitive Features

Features that change supplier assumptions

Sealing face flatness and surface finish

O-ring groove width, depth, and edge condition

Bearing seat diameter, concentricity, and runout

Impeller clearance-related faces

Mounting face flatness and hole pattern

Port or thread requirements

Machining allowance and datum sequence

Porosity-sensitive wall sections

Leak-test medium, pressure, hold time, and acceptance criteria

Supplier Questions

Questions buyers should ask before comparing pump housing quotes

Which surfaces are included in the CNC machining price?

Which datum structure will be used for bearing-seat and sealing-face machining?

Is leak testing quoted as 100 percent inspection, sample inspection, or excluded?

Are CMM records included or optional?

Does the quote include material certificate and heat-treatment record?

Are impregnation, repair, or welding allowed by the drawing or buyer policy?

What casting route is assumed and why?

Review one non-confidential pump housing drawing

Bohua can mark quote-sensitive assumptions around casting route, CNC scope, sealing and leak-test criteria, bearing-seat datums, and inspection records before pricing.

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FAQ

Pump housing RFQ questions

Why should pump housing RFQs separate casting and machining assumptions?

Pump housing cost and lead time often depend on sealing faces, bearing seats, datum sequence, leak-test scope, and CMM requirements. Separating casting blank and CNC machining assumptions makes supplier quotes easier to compare.

What leak-test information should be included?

Define the test medium, pressure, hold time, acceptance criteria, sampling plan, and whether a leak-test record is required. If these are unknown, mark the requirement as open for supplier review.

Can Bohua review one pump housing drawing before a full quote?

Yes. One non-confidential drawing page can be enough to identify quote-sensitive assumptions around sealing faces, bearing seats, leak-test planning, machining scope, and inspection records.