Parison Cutters / Stab Knives

Parison Cutters / Stab Knives for thermoplastics blow moulding

Parison Cutters / Stab Knives manufactured in the UK by Fernite of Sheffield Ltd
  • Stab Knives and Parison Blades for thermoplastic moulding
  • Blades to fit any machine type  
  • Premium ‘Made in Sheffield’ quality


Ensure a precise cut with Fernite’s high quality  parison cutters for the blow moulding process.

Parison cutter knives are commonly known as stab knives, jab knives, trim knives, cut-off knives etc…

Our knives are manufactured in the UK at our Sheffield factory from high quality European steels, and 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 knives 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.

Regrind service

We offer a professional regrind service to keep your knives in optimum condition. Precision ground by our skilled staff, we ensure a manufacturer-quality finish, allowing you to minimise downtime and keep producing. Call 0114 244 0527 to find out more.

Size reduction solutions

For efficient size reduction of plastics,  Fernite of Sheffield Ltd’s A. F. Whiteley division are UK manufacturers of granulator blades, offering world-leading quality and a friendly, professional service.

The Whiteley Premier service offers the easiest way to manage granulator blades, taking care of inspection, regrinds, manufacture and dispatching from stock – all for a simple, fixed price.

For further information please see