Sourcing Circular Slitter Knives from China

UK duty and classification by use

Read from the UK Trade Tariff on 5 November 2026, heading 8208 covers knives and cutting blades for machines or mechanical appliances. Circular slitter knives are classified by their application: metalworking, woodworking, food machinery or other uses such as paper and film converting. See the wider machine knives and blades guide.

The supplied tariff records show 0% duty for goods from China across these lines, with no anti-dumping or countervailing duty, suspensions or steel measure recorded. The other-use line carries a torture-goods import prohibition and an export restriction. Official guidance prohibits import and export of listed torture goods; the import notice includes execution guillotines and their blades. Ask your customs broker to confirm the tariff declaration for your industrial slitter knives.

Confirm the commodity code using the machine application, drawing and material being cut, rather than the circular shape alone. The worked order is illustrative and uses values from the supplied reference guide. Allow for 20% import VAT separately from duty; see UK import duty and VAT.

Specify the cutting pair and shaft fit

Identify whether the knife works against another rotary knife, an anvil or a crush-cutting surface. State the material being slit, machine model, steel or carbide grade, hardness, coating and intended regrinding allowance. Provide a drawing showing outside diameter, bore, thickness, bevel orientation, edge angle, keyways and mounting faces.

Agree bore fit, concentricity, face runout, flatness and surface finish with the machine operator. Specify matching upper and lower knives where relevant, together with spacer dimensions and the cutting clearance used in the trial. For food-contact knives, ask for material certificates and a food-contact declaration, as explained in the supplied machine-knives guide.

Worked duty example

Illustrative example, not a quote: Illustrative batch of replacement circular slitter knives for a converting business under 8208 90 00 00, invoiced at £28,000 free on board, with £1,200 of freight and insurance to the UK. The customs value is £29,200. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £29,200, so it is £5,840. 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

Material: compare batch certificates with the ordered grade, verify hardness on samples and inspect coatings or carbide joints where specified.

Geometry: measure bore, diameter and thickness against the drawing; check concentricity, face runout and flatness on a suitable fixture.

Cutting: inspect bevel direction, chips and grinding burrs, then trial matched knives on the buyer's material for edge quality and stable tracking.

Packing: check that cutting edges are guarded, knives cannot strike each other and labels identify the drawing revision, application and batch. Agree the checks through quality inspection.

What goes wrong

A knife can fit the shaft yet cut badly because its bore is off-centre, its mounting face is uneven or the bevel faces the wrong way. Incorrect clearance or mismatched knives can leave burrs on metal, frayed textile edges or ragged film cuts. Compare trial results with the approved sample before accepting the batch.

Soft edges dull quickly; brittle edges chip. Grinding damage and corrosion can appear beneath protective oil, while loose packing damages an otherwise sound edge. Agree material checks, clean sample inspection and a cutting trial before shipment, and repeat the agreed arrival checks before releasing knives to production.

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.