Sourcing / Industrial Sub-Assembly Manufacturing in Vietnam
Industrial Sub-Assembly Manufacturing in Vietnam
Frames, brackets, enclosures and cabinets for machinery, furniture hardware or equipment usually combine sheet metal, welding and a finish, and ship as one tested assembly rather than loose parts.
What this scope usually covers
- Sheet metal fabricationLaser or punch cutting, bending and welding to a drawing, with tolerances stated on the print rather than assumed.
- Surface finishingPowder coating, plating or anodizing, matched to the corrosion and wear environment the part will sit in.
- Sub-assembly and fit checksBolted or welded sub-assemblies fitted and function-checked against a master or a mating part before packing.
- Crating for freightWood crating and blocking sized for the load and the freight method, not a generic box.
What to put in your brief
Manufacturers quote faster and closer to a final number when this is stated up front rather than found during a back and forth.
- Material grade and thickness, and whether substitution is acceptable if the exact grade is not locally stocked.
- Critical tolerances called out on the drawing, not left to general shop tolerance.
- Finish and corrosion requirements for the environment the part will operate in.
- Whether the assembly needs to fit or function-test against a mating part or a master sample before it ships.
Where first orders go wrong
- Tolerances left to general shop practiceWithout a stated tolerance on a critical dimension, the shop will use its own default, which may not fit your mating part. Call out what matters on the drawing.
- Finish specified by name, not by test“Powder coated” says nothing about salt spray resistance or coating thickness. State the test or standard your application needs.
- Weld quality assumed rather than specifiedStructural welds carrying load need a stated standard and inspection method, not a visual check after the fact.
Questions buyers ask
Can a metal fabrication shop also handle the finishing?
Some run coating or plating in house; many subcontract it to a specialist and coordinate the schedule. Either way it should be one turnkey quote covering fabrication through finished, crated parts.
What information does a fabricator need to quote accurately?
A dimensioned drawing with material grade, critical tolerances and finish called out, plus the order quantity. A description without a drawing usually comes back with a wide price range or a request for one.
Related guides
- Process
What Turnkey Manufacturing Includes: A Buyer's Checklist
A stage by stage breakdown of what turnkey manufacturing includes, what it quietly leaves out, and the lines to write into the contract before tooling is cut.
- Process
What to Check on a Factory Visit in Vietnam
What to look at on a factory visit beyond the machines, the questions that reveal process control, and how to decide whether the trip is worth taking at all.
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