Ceramic Knuckle Heaters

We provide various types of knuckle metal ceramic heaters which are used for the following applications: injection moulding, extrusion, blow moulding, rubber moulding, packaging, test equipment, laboratory equipment and including other ones. Also, we meet to our customer’s expectations by manufacturing high quality knuckle metal ceramic heaters.


Our Knuckle metal ceramic heaters are developed to meet industries demands for a long lasting, high temperature heater. Its construction consists of a helically wound resistance spiral, precisely stretched and strung through specifically designed refractory ceramic bricks. The build-up of the ceramic brick provides a flexible heating mat which is placed into a rolled outer metal casing and a 4mm thick ceramic fibre insulation. This provides an efficient high temperature and high watts density band heater.

The standard design of our knuckle metal ceramic heaters are capable of reaching temperatures up to 450°C! Also, it has a built-in thermocouple and it is a unique flexible design, making it the first choice with most European machinery manufacturers.

Sheath Material S/S 304
Insulation Material Ceramic Insulators – High Temperature
Heat Saving Insulation 4mm thick fibre insulation
Spirals NiCr
Standard Wall Thickness 12.5mm ( ½”)
Gap 9.5mm ( 3/8)
Terminations Threaded Terminals Threaded Terminals with Terminal Box Ceramic BlockCeramic Block with Terminal BoxLow Profile Box with leadsArmour Braided CableFlexible Metallic ConduitGlass Fibre Leads (double insulated)2 Pin or 3 Pin plugs & Sockets

Advantages and Options

Unlike all other types of band heaters, the knuckle ceramic metal heater heats by radiation. When used on injection moulding machine barrels, it can be provided with a metal insulation jacket with 12.5mm ceramic fibre insulation for energy savings of up to 25%, resulting in reduced power consumption and cooler working conditions.

They can be also used on extruder barrels which can be provided with a mesh style outer metal casing, leaving air gaps between the ceramic bricks allows for air cooling, enabling critical extrusion temperatures to be maintained.

Complete units can be manufactured for extrusion machines with outer cowls, inlet and outlet air boxes together with high output blowers/fans. Here at Elmatic, we take pride in our metal ceramic heaters and we believe that they are right your ceramic heating applications! As Elmatic are your source for quality industrial and electric heating elements.

Delivery & Enquiries

Most items are available for delivery in 10 to 15 working days. However, we do offer additional emergency services for customers who are in a breakdown situation. This includes a 48hr services on Mica products, Cartridge Heaters and Ceramic Knuckle Heaters. For all enquires please contact a member of our sales team who will be happy to assist.