Sourcing electric motor commutators from China
Electric motor commutators from China generally carry 2% UK duty under 8503 00 98 99; qualifying stamped collectors can receive 0%. Match the exact tariff description before claiming relief, and specify segment geometry, insulation and shaft fit against the motor drawing. Cambridge China Bridge sources electric motor commutators.
Commutator duty and the stamped collector exception
Heading 8503 covers parts suitable solely or principally for electric motors and generators. For separate commutators of other materials, check 8503 00 98 99 against the construction and intended use. The table repeats this supplied tariff line for different commutator forms; these are not separate commodity codes. See the wider motor parts guide for stators, rotors and housings.
Read from the UK Trade Tariff on 19 October 2026, the supplied line carries 2% duty for goods from China, with no anti-dumping or countervailing measure recorded. Its 0% suspension includes a stamped electric motor collector with an external diameter not exceeding 16 mm. A small diameter alone does not establish eligibility. The suspension excludes mixtures, preparations or products made up of different components containing these products.
The line also records an authorised-use suspension for manufacturing offshore wind turbine rotors, rather than general commutator purchases. The UK Trade Tariff attaches a supplementary-unit import measure; confirm the declaration requirement with your customs broker. Send the drawing, material specification and intended motor application when confirming the commodity code.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Separate electric motor commutators, other materials | 8503 00 98 99 | 2% | None |
Specify the copper segments and shaft fit
Agree the copper grade, segment count, outside diameter, bore, working length, hook or slot geometry and insulation material. Put bore fit, concentricity, working-surface finish and any mica undercut on the drawing. Identify whether the supplier delivers a finished commutator or a blank requiring machining after assembly.
Agree checks for insulation between segments, segment retention after heating and attachment to the armature winding. Test an assembled sample with the intended brushes and motor duty. Keep the approved sample and drawing revision together so replacement batches use the same geometry.
Confirm with the relevant product-safety authority whether the parts or the finished motor or machine require UKCA or CE marking. Ask for the copper and moulding compound composition. Under UK REACH, supplying articles containing a Candidate List substance above 0.1% by weight requires sufficient safe-use information for business recipients, including the substance name.
Worked duty example
Illustrative example, not a quote: 5,000 electric motor commutators outside the suspension description; illustrative order under 8503 00 98 99, invoiced at £20,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £21,500. Duty at 2% is £430. Import VAT at 20% is charged on the customs value plus duty, £21,930, so it is £4,386. Import taxes total £4,816; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £430 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Geometry: measure the bore, outside diameter, working length and concentricity against the drawing; check the segment count and winding connection geometry.
Copper surface: inspect for burrs, cracks, contamination and raised segments; compare the material certificate and surface finish with the approved specification.
Insulation: test between segments using the agreed method; inspect moulding voids and mica position, and check retention after the agreed heating test.
Arrival condition: check for bent hooks, damaged slots and corrosion; trial-fit sampled parts to the intended shaft and retain batch identification.
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What goes wrong
A commutator can fit the shaft yet run poorly because its working surface is eccentric or segments stand proud. Burrs and conductive debris can bridge the insulation gaps. Weak moulding or loose segments may only become apparent after heating and rotation, so visual inspection alone is insufficient.
A supplier may describe any small commutator as a stamped collector to suggest duty relief. Ask how it is manufactured and compare the actual part with the suspension wording. Approve the copper grade and insulation compound before production, and investigate substitutions before accepting the batch.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.
Frequently asked questions
What is the UK import duty on electric motor commutators from China?
The supplied line 8503 00 98 99 carries 2% duty. Qualifying stamped collectors can receive 0% under the listed suspension. No anti-dumping or countervailing measure is recorded.
Does a small commutator qualify for zero duty?
Not automatically. The suspension names a stamped electric motor collector with an external diameter not exceeding 16 mm. Confirm the construction and full tariff description with your customs broker.
What drawing should I send a commutator factory?
Include segment count, copper grade, insulation material, bore fit, outside diameter, working length, concentricity and hook or slot geometry. State whether final machining happens before or after assembly.
How do I check commutators before accepting a batch?
Measure geometry and shaft fit, inspect copper surfaces and insulation gaps, test insulation between segments, and check segment retention after heating. Trial-run assembled samples with the intended brushes.