Sourcing carbide mining buttons from China

0% duty on unmounted mining buttons

Read from the UK Trade Tariff on 26 October 2026, heading 8209 covers plates, sticks, tips and similar tool components, unmounted, of cermets. Loose cemented carbide mining buttons belong within this product family; the relevant line to check is 8209 00 80 00, “Other”. Complete drilling tools need their own classification.

The supplied tariff record lists 0% duty for goods from China, with no anti-dumping or countervailing measures, suspensions or attached import controls. The button shapes in the table share the same tariff line; they are not separate commodity codes. Import VAT is separate from customs duty.

Confirm the supplied condition, material and intended use against the drawing before declaring the commodity code. For the wider heading, see carbide inserts and tool tips.

Button geometry, binder and rock conditions

Specify head profile, shank diameter, overall height, head radius or cone angle, chamfer, surface finish and dimensional tolerances on an agreed drawing. State whether the buttons are ground or supplied as sintered, and identify the receiving hole and fitting method. A matching catalogue photograph does not establish fit.

Agree tungsten carbide grain size, binder composition, hardness and toughness evidence, and batch identification. Describe rock abrasiveness, impact conditions and the drilling application. Compare samples with your current buttons under comparable drilling conditions, recording wear, fracture and retention rather than accepting a supplier's grade name as proof.

Workplace product supply obligations include safe-use information and instructions, subsequent revisions, and necessary testing or examination. For this order, request fitting instructions, application limitations and relevant test records alongside the material and dimensional evidence.

Worked duty example

Illustrative example, not a quote: 20,000 unmounted cemented carbide mining buttons, illustrative order under 8209 00 80 00, invoiced at £36,000 free on board, with £800 of freight and insurance to the UK. The customs value is £36,800. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £36,800, so it is £7,360. 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

Dimensions: measure shank diameter, height and head profile against the drawing, including roundness and the agreed fitting surfaces.

Surface condition: inspect heads and shanks under magnification for cracks, chips, grinding damage and defects at the head-to-shank transition.

Grade and batch: match package lot marks to material and test records; check sampled hardness and density against the agreed specification.

Fit and drilling trial: check sample retention in the intended tool body, then compare wear and breakage in representative rock. Record results by batch before approving repeat supply.

What goes wrong

A button can match the nominal dimensions yet fit poorly because shank tolerance or roundness varies. An unsuitable balance of wear resistance and toughness can produce rapid wear or head fractures. Mixed grades and missing batch records make it difficult to trace a failed drilling trial to the material supplied.

Keep an approved drawing and reference sample, agree how material or process changes will be approved, and separate damaged or unidentified stock on arrival. Use a quality inspection brief that covers dimensions, batch evidence and the intended fitting method.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.