Parison Cutters / Stab Knives

Parison Cutters / Stab Knives for thermoplastics blow moulding

  • Stab Knives and Parison Blades for thermoplastic moulding.

  • Blades to fit any machine type  – with custom options available.

  • Premium ‘Made in Sheffield’ quality.

High quality parison cutters for the blow moulding process.

Ensure a precise cut with Fernite’s range of precision-manufactured parison cutters. Parison cutter knives are commonly known as jab knives, trim knives and cut-off knives, and are an essential component in the blow moulding process.

Fernite knives are manufactured in our ISO9001:2015 Certified Sheffield factory.  We only source high quality raw materials,  and we use the very latest advanced manufacturing precision ground for exceptional cutting performance. With decades of experience in manufacturing stab knives and parison cutters and blades for thermoplastics operations, Fernite provides an efficient, reliable, knowledgeable and friendly service to the plastics industry.

Our plastic recycling machine blades can be manufactured to your exact specifications, guaranteeing excellent performance in all types of blow moulding machine. We also hold an extensive range of drawings for all types of machines including: Battenfield, Bekum, Serta and KEB.

Every blade we manufacture is made in the UK in our Sheffield factory – giving us complete control over the entire process from specification and design to the quality of the finished product, as well as the all-important lead time.

To discuss your requirements and for a competitive quote, get in touch with our friendly team on +44 90)114 244 0527 or email

Coatings available

Fernite stab knives/parison blades can be coated if required to maintain the sharpness of the cutting edge and to resist corrosive substances. Stainless steel cutters are also an option.

Size reduction solutions

For efficient size reduction of plastics we supply pelletizer / die face cutter blades for the masterbatch process. All common types including Erema, Battenfield, Buss, Munchy, Beringer, Alpina and many more are offered.

Stab knives are an essential part of the plastic bottle manufacturing process.

Fernite can supply a wide variety of blades to suit all production processes.