Twin-Screw Extruders

  • Parts

    Specialized Parts

    Precision components based on Original Equipment Manufacturer (OEM) drawings, and a high level of process knowledge, are essential to consistent extruder operation.

    Screw Parts

    Extruder screw parts must be made using the original drawings to achieve the exact angles and clearances that ensure effective operation. Correct material choice is also critical to achieving long life, especially if specialist materials for high wear or corrosion resistance are used. Extensive stock holding means that orders for full sets of screws, or only the elements that have worn, can be supplied ‘off-the-shelf’. Low-wear parts previously made to order are also held in stock.

    Barrel Liners

    These key parts must be machined to precise sizes and tolerances in two dimensions. Parameters must remain constant when subject to elevated temperatures and pressure. Additionally, barrel liner manufacture must achieve an exact diameter along the full length of the barrel for screw placement; clearances between screw and barrel are critical. Fixing points must match those on the machine to avoid misalignment at assembly.


    These are designed specifically for Baker Perkins twin-screw extruder specifications. They must achieve two co-rotating outputs, and be capable of handling high torque. Older machines have David Brown gearboxes: Baker Perkins now owns the intellectual properties associated with these gearboxes, and is the sole manufacturer.

    Newer extruders are fitted with PIV gearboxes; Baker Perkins has an exclusive arrangement for their supply. In order to achieve acceptable levels of performance and reliability it is necessary to use these gearboxes.

  • Why Baker Perkins?

    Baker Perkins stocks cover the complete standard shaft configuration of every size of extruder in the powder coating range, from the feed section through mixing, melting and discharge. Stock is held in the UK and USA to minimize delivery times.

    Baker Perkins offers advice over the phone or through site visits on optimizing extruder performance for maximum effectiveness. We are also happy to provide a list of the most frequently required wear parts for each machine, and hold them in stock for immediate delivery. Parts that are specific to an individual machine or customer can be manufactured by arrangement and held on consignment until required.

    Baker Perkins extruder screw parts are made to the original specification and drawings. They meet precise profile and clearance criteria, are inspected to the highest quality standards, and can be fitted first time without adjustment or modification. When parts have been improved since the extruder was built, an upgraded part is offered if appropriate.

    Screw parts are inevitably subject to wear: buying from the Original Equipment manufacturer ensures maximum performance and service life. Hundreds of the most common parts are held in the UK and USA for immediate delivery ex-stock.

    Choice of material

    Expert advice is available from our team of product specialists. Baker Perkins technologists can advise on the ideal material to ensure the longest life and lowest overall cost. Correct choice of material minimizes processing abrasion and corrosion, and prolongs screw part life. The range includes EN19 carbon steel, D2 tool steel, 440C tool steel and Vanadium tool steel (VTS). Parts are available in every commonly supplied material, including those specified for high abrasion and corrosion resistance

    Process advice

    Screw configuration can be assessed for maximum effectiveness - new agitator elements are available to improve the feed section operation through an updated configuration; innovative paddle arrangements can solve process issues within the mixing zone; alternative materials offer longer life in high wear or corrosion situations. Configurations can be changed to provide alternative end-product capability.

  • Request a Quotation

    Where to find your Baker Perkins name plates:

    Your Baker Perkins name plates can be found on the main frame of the machine. It is usually located near to the main drive.

    When ordering replacement parts, please quote the following typical details if possible:

    Contract number [i.e. BPF 000000]

    Machine number [i.e. 271/1BPF 999000]

    Description of the part [i.e. spring]

    Drawing number or code number of the part [i.e. 9386892G]

    Quantity required

    Quoting all the above will assist Baker Perkins to supply quotes and parts quickly.

    Click to request quote

    Please use this link to check availability of recommended parts and request a quote for your equipment.

    If a required item is less clearly defined:

    Please also quote the number of the picture drawing on which it is shown.

    An email of the drawing with the part highlighted can be useful in identifying any parts required.

    A photograph of the required part can also be useful in identifying any parts required.

    Please contact Baker Perkins’ customer support centre to discuss your requirements.

Contact Baker Perkins

Contact Baker Perkins

Contact us to discuss all Customer Service and Aftermarket requirements for your Baker Perkins, APV Baker and Werner Lehara equipment.

Lifetime Support for Extrusion Equipment

Lifetime Support for Extrusion Equipment

Parts, service, upgrades and rebuilds for your APV and Baker Perkins machines for as long as they remain in production..

Extrusion Innovation Centre

Extrusion Innovation Centre

The Extrusion Innovation Centre offers full powder coating and non-food production facilities, alongside research and development services for many industrial applications.

Extrusion News Archive

Extrusion News Archive

Keep up-to-date with Baker Perkins' latest developments in powder coating and industrial extrusion.