Sourcing diamond polishing pads from China

Duty and backing classification

Read from the UK Trade Tariff on 30 September 2026, heading 6805 covers abrasive powder or grain on a base, including goods cut to shape. Chinese-origin goods carry 0% across the heading, with no anti-dumping or countervailing duties or suspensions recorded. The table distinguishes pad formats; formats with the same base can share a code.

The tariff attaches import and export waste controls. For waste pads from China entering England under notification controls, the exporter must apply to the competent authority in China for consent. Confirm the waste classification and complete shipment requirements with your customs broker before dispatch; also confirm the attached export control before returning waste pads overseas.

Obtain the base material, layer construction and a cross-section photograph before confirming the commodity code. Bonded grinding wheels belong to heading 6804, so do not select a code from the product name alone. For related backed diamond abrasives within this heading, see the diamond lapping films guide.

Specify the stone, bond and polishing sequence

State whether the pads will polish granite, marble, engineered stone or concrete, and whether use is wet or dry. Specify diameter, thickness, flexibility, grit sequence, diamond particle grading, bond formulation, groove pattern and attachment. Ask the factory to explain its grit scale rather than accepting colour as proof of grade. Agree the intended machine, operating speed and backing plate.

Approve samples on the actual workpiece using the intended polishing sequence. Compare scratch removal, gloss, edge finish, colour transfer and pad wear against a retained reference. Consumer packs in Great Britain fall under the General Product Safety Regulations 2005, whose aim is that only safe products are supplied. Include clear wet or dry use instructions and the agreed operating limitations in your purchasing specification.

Worked duty example

Illustrative example, not a quote: 1,500 polymer-backed diamond polishing pads, illustrative order under 6805 30 00 00, invoiced at £3,200 free on board, with £1,500 of freight and insurance to the UK. The customs value is £4,700. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,700, so it is £940. 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

Construction: check backing material, thickness, flexibility, groove pattern and layer adhesion against the approved sample.

Attachment: check fit on the intended backing plate and repeat attachment and removal; look for loose edges and separation after wet use.

Polishing: trial each supplied grit on the agreed stone; check residual scratches, gloss, colour staining and uneven wear.

Identification: check grit markings, wet or dry designation, operating instructions and batch identity against the order. Plan checks using the quality inspection guide.

What goes wrong

A pad can look correct yet leave deep scratches because coarse particles contaminate a finer grade. A mismatched bond may glaze over or wear rapidly on the target stone. Colour can transfer onto pale surfaces, while uneven abrasive distribution leaves an inconsistent finish.

Weak attachment or layer adhesion can cause separation during polishing. Test production samples after water exposure where wet use is specified, and compare the complete grit sequence with the retained reference. Agree acceptance criteria before ordering rather than judging the shipment by pad colour or packaging.

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.