Sourcing rubber internal mixers from China

Duty on internal mixers and related parts

Read from the UK Trade Tariff on 30 September 2026, heading 8477 covers machinery for working rubber or plastics and its parts. Rubber internal mixers fit the mixers, kneaders and agitators description at 8477 80 93 00. The table also includes dedicated spare parts and cutting equipment for preparing mixer feed.

All selected lines carry 0% duty on goods from China. The supplied tariff facts list no anti-dumping or countervailing measures, suspensions or attached import controls for these lines. Import VAT is separate from customs duty.

Confirm the commodity code from the machine's function and the description of separately shipped parts. For related equipment within the wider heading, see rubber two-roll mills.

Specify the compound and rotor arrangement

Specify whether you need tangential or intermeshing rotors, working chamber volume, usable batch weight for your compound, rotor speed range, drive torque and ram pressure. Agree chamber and rotor wear surfaces, seal construction, cooling circuits and discharge arrangement. Match the feed hopper and discharge height to your existing material handling.

Use your own rubber formulation for the acceptance trial. Agree how batch weight, mixing time, discharge temperature, power consumption and compound dispersion will be recorded. Specify controller language, recipe access, electrical supply, cooling-water needs and replacement seals. Request the declaration of conformity and check the CE or UKCA marking against the supplied machine documents.

Before machinery is placed on the Great Britain market or put into service, it must be safe. HSE guidance requires trapped-key interlocking at both rear inspection and discharge openings of internal mixers. Have the supplier demonstrate these safeguards and the maintenance access sequence before shipment.

Worked duty example

Illustrative example, not a quote: A rubber internal mixer for a small compound producer, illustrative only under 8477 80 93 00, invoiced at £64,000 free on board, with £5,000 of freight and insurance to the UK. The customs value is £69,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £69,000, so it is £13,800. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Compound trial: compare batch records and retained samples with the agreed acceptance criteria, including dispersion and discharge temperature.

Access safeguards: check the trapped-key system at the rear inspection and discharge openings, hopper guarding and emergency stops; record the demonstrated access sequence.

Cooling and seals: check cooling flow, temperature control, rotor seal leakage and discharge-door closure during the loaded trial.

Arrival and documents: inspect for corrosion, damaged pipework and loose connections; match the nameplate, controller, diagrams and spare parts to the order.

What goes wrong

A chamber-volume claim can hide a smaller usable batch capacity for your formulation. An unloaded demonstration will not reveal poor dispersion, excessive temperature rise or inadequate drive torque. Make acceptance depend on a loaded compound trial and retained samples rather than the supplier's catalogue.

Check for cooling circuits that are difficult to clean, leaking rotor seals and compound left around the discharge door. Maintenance access deserves particular attention because hardened compound can make blockage clearance difficult. Agree replacement wear parts, seal drawings and controller access before shipment.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For machinery and equipment, see machinery imports.