Sourcing plastic granulator knives from China

Duty and tariff controls

Read from the UK Trade Tariff on 6 November 2026, heading 8208 covers knives and cutting blades for machines or mechanical appliances. Plastic granulator knives fall within the other-use line, 8208 90 00 00. The table shows product variants within that same line, rather than separate classifications.

The supplied tariff record gives 0% duty for goods from China, with no anti-dumping or countervailing duty and no suspension recorded. It attaches an import prohibition and an export restriction concerning goods for torture and repression. Official guidance prohibits imports of the listed prohibited goods. Ask your customs broker to confirm the attached conditions against the knife design and industrial application before shipment.

Send the drawing, machine details and intended use to your broker to confirm the commodity code. For other applications, see the machine knives and blades guide. Budget separately for import VAT using the UK import duty and VAT guide.

Specify rotor and bed knives to drawing

Identify the granulator model and distinguish rotating knives from stationary bed knives. Supply a controlled drawing showing length, width, thickness, hole centres, slots, countersinks, bevel direction and cutting-edge geometry. State whether edges are reversible and how knives are grouped into replacement sets.

Agree steel grade, heat treatment, hardness range, flatness and the permitted regrinding allowance. Describe the plastic feedstock and any abrasive fillers. Ask the factory to provide material certificates, batch hardness results and an approved sample. A photograph or machine model name alone does not establish fit.

Worked duty example

Illustrative example, not a quote: Illustrative order: 20 replacement plastic granulator knives under 8208 90 00 00, invoiced at £4,500 free on board, with £450 of freight and insurance to the UK. The customs value is £4,950. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,950, so it is £990. 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

Steel and hardness: match material certificates to the supplied batch, check steel by spot analysis and measure hardness at agreed positions against the drawing.

Geometry and fit: measure thickness, flatness, hole centres, slots and bevel direction; compare rotor and bed knives with approved gauges or samples.

Edges and sets: inspect for chips, burrs and grinding damage, check matched-set weights and trial the knives on the buyer's plastic feedstock.

Arrival and fitting: check rust protection, edge guards and batch identification before releasing stock. HSE says plant and equipment must be made safe before maintenance starts; most maintenance should be carried out with the power off. Plan fitting around the machine manufacturer's instructions.

What goes wrong

Substituted steel or uneven heat treatment can cause rapid dulling or chipped edges. Grinding can leave knives bowed or uneven in thickness. Incorrect holes, countersinks or bevel direction can prevent proper seating, while mismatched rotor sets can upset balance.

Approve a sample against the drawing before production and retain the batch evidence. Agree how failures will be assessed using hardness, dimensions and a cutting trial, rather than accepting a steel name on an invoice as proof. Use an agreed inspection brief for repeat orders.

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.