Mechanical Assembly: a buyer's sourcing guide
Everything a procurement team should know before opening an RFQ for mechanical assembly: materials, tolerances, certifications and red flags.
Recent RFQs in mechanical assembly
Overview
Outsourced assembly bundles component sourcing, assembly, leak/test/calibration and shipping. The cost saving comes from labour arbitrage and from removing the buyer's in-house assembly footprint.
When to choose this process
Use when assembly is repetitive, well-documented (BOM + work instructions) and free of certified processes the OEM must keep in-house.
Typical materials
- Buy-to-print parts + commercial components (fasteners, seals, bearings, motors)
Typical tolerances
Defined by test/calibration spec: leak rate, torque, electrical continuity, run-in cycle.
Certifications to ask for
- ISO 9001
- IATF 16949 (auto)
- ISO 13485 (medical)
- UL/CE for finished units
Frequently asked questions
How do I structure an assembly contract?
Define BOM ownership (consigned vs supplier-bought), tests/calibrations, packaging spec, and split-of-warranty between assembler and OEM.
Can the supplier buy components on my behalf?
Yes — most assemblers do 'turnkey' purchasing; expect a 5–15% mark-up vs you placing the POs yourself, in exchange for stock and inventory management.
Sourcing countries covered
Editorial market guide. Supplyria is a marketplace; we don't list private suppliers on this page. Cost ranges and lead times are indicative and based on public industry benchmarks.