Replacement Screw Elements for KY, Jwell, Cenmen, Berstorff, Leistritz and Other Twin-Screw Extruders

Whether a replacement screw element fits is decided by its dimensions and geometry, not simply by the name on the extruder. Outside diameter, screw centre distance, flight lead, element length, shaft spline and profile geometry all influence compatibility. Two machines may use a similar screw design but still require different replacement parts.

EXTRUTEX manufactures replacement screw elements, kneading blocks, mixing elements, screw shafts, barrel sections and barrel liners for co-rotating parallel twin-screw extruders. We supply parts for Chinese-built and international machine platforms, including selected models from KY, Jwell, Cenmen, Jieya, Chuangbo, Meizhilong, Useon, Kerke, Coperion, KraussMaffei Berstorff, Leistritz, JSW, Shibaura Machine, CPM, ENTEK, Maris and other manufacturers.

Parts are manufactured against confirmed OEM dimensions, technical drawings or approved physical samples. Depending on the machine, EXTRUTEX can supply individual conveying elements, kneading blocks, complete screw sets, shafts, barrel sections and wear-resistant components.

EXTRUTEX Replacement Screw Elements: Technical Overview

Material grades, stock status, inspection scope and delivery time are confirmed for each order. The stated 30–45-day period is an indicative production lead time for imported-machine spares after the technical details and material are confirmed.

International Twin-Screw Extruder Brands We Can Assess

The following directory covers established manufacturers of co-rotating twin-screw extruders used in polymer compounding, masterbatch production, recycling, engineering plastics, chemicals, food processing and laboratory development.

It is a manufacturer and machine-platform directory, not a statement that every model is interchangeable or that every brand is held in stock. Some companies have several machine families, including counter-rotating, single-screw and specialist food-processing equipment. EXTRUTEX checks the exact machine configuration before confirming a replacement part.

European and international industrial manufacturers

Japanese and Asian international manufacturers

Chinese twin-screw extruder manufacturers

Other manufacturers and specialist platforms

Depending on the application, further machine names may appear in laboratory extrusion, food and feed processing, pharmaceutical extrusion and specialist compounding markets. These include APV, Baker Perkins, Bühler, Clextral, GEA, Wenger, Brabender, Thermo Fisher / Haake, Labtech and other regional equipment suppliers.

Not every machine in these manufacturers' catalogues is a co-rotating polymer compounding extruder. For this reason, EXTRUTEX treats these as model-specific enquiries rather than assuming a common screw-element design.

Replacement Screw Elements for KraussMaffei Berstorff

KraussMaffei Berstorff machines include co-rotating twin-screw platforms with manufacturer-specific screw geometry. The ZE and ZE UT ranges require components matched to their original profile, shaft connection, centre distance and pitch.

EXTRUTEX can assess replacement conveying elements, kneading blocks, mixing elements, screw shafts and barrel components for confirmed Berstorff models.

• Berstorff ZE and ZE UT machine families
• Manufacturer-specific screw profile and flight geometry
• Conveying and kneading elements
• Mixing and reverse elements where specified
• Barrel sections and liners matched to the original bore arrangement
• Single elements or matched screw sets

Berstorff elements should not be assumed interchangeable with Coperion ZSK elements. Similar appearance or a shared co-rotating principle does not establish dimensional compatibility. Each part must be checked against the relevant machine drawing or sample.

Leistritz, JSW and Shibaura Machine Replacement Parts

EXTRUTEX can review replacement-part requirements for other established international twin-screw platforms. The machine model, screw size, shaft connection and element position are needed to establish the correct geometry.

Leistritz ZSE

Leistritz ZSE machines use modular co-rotating screw assemblies. Replacement parts may include conveying elements, kneading blocks, mixing elements, shafts and barrel sections. The exact ZSE series and configuration must be identified before production.

JSW TEX

Japan Steel Works manufactures co-rotating twin-screw extrusion systems for compounding and other demanding processes. EXTRUTEX can assess TEX replacement elements and shaft components from drawings, part numbers or physical samples.

Shibaura Machine and legacy Toshiba platforms

Shibaura Machine is the current company name associated with the former Toshiba Machine identity. Older machine documentation may still use Toshiba branding. When requesting replacement TEM components, provide the original machine nameplate, model and element identification so that the correct generation and dimensions can be checked.

Replacement Parts for Chinese-Built Twin-Screw Extruders

Chinese-built co-rotating twin-screw extruders are widely used in polymer compounding, colour masterbatch, filler masterbatch, cable compounds, engineering plastics, recycling and modified polymer production. EXTRUTEX supplies replacement screw elements and related components for selected Chinese machine platforms.

Common machine names include KY, Jieya, Chuangbo, Cenmen, Meizhilong, Jwell, Useon, Kerke, Cowin, XINDA and Nanjing Haisi. Common replacement items may be available from stock, depending on the screw diameter, profile, material and machine generation.

KY (科亚) screw elements and barrels

KY machines are associated with co-rotating twin-screw compounding equipment. EXTRUTEX can assess conveying elements, kneading blocks, mixing elements, shafts and barrel sections for confirmed KY models. A ZSK-type profile reference is not sufficient by itself to confirm compatibility; shaft spline, centre distance and element dimensions must also match.

Jwell (金纬) screw elements and barrels

Jwell manufactures different extrusion systems for pipe, profile, sheet, recycling and compounding applications. Spare parts can differ between machine families, even when the nominal screw diameter is similar. Provide the exact machine model and element position so that EXTRUTEX can check the correct flight lead, shaft connection and profile.

Cenmen (诚盟) screw elements and barrels

Cenmen machines are used in compounding and masterbatch production. EXTRUTEX can supply conveying elements, kneading blocks, shafts and barrel sections after confirming the bore centres, shaft dimensions and screw geometry. A model number alone may not identify every production revision.

Jieya (杰亚) screw elements and barrels

Jieya manufactures co-rotating twin-screw equipment for compounding and related polymer-processing applications. EXTRUTEX can assess replacement elements, kneading blocks, shafts, barrel sections and liners. Availability depends on the specific machine size and component specification.

Chuangbo (创博) screw elements and barrels

Chuangbo machines are used in colour masterbatch and filled-compound production. Abrasive materials such as calcium carbonate, talc and glass fibre can accelerate wear on screw flights and barrel surfaces. EXTRUTEX can recommend suitable material options after reviewing the compound formulation and operating conditions.

Meizhilong (美芝隆) screw elements and barrels

EXTRUTEX can assess replacement screw elements, shafts and barrel sections for Meizhilong machines used in compounding, sheet, board and recycling applications. Worn original components can be measured when the original OEM drawing is unavailable.

Useon (优信) screw elements and barrels

Useon supplies co-rotating twin-screw compounding platforms, including U+, SAT and EC series machines. EXTRUTEX can review conveying elements, kneading blocks, mixing elements, shafts and barrel components against the exact machine model and drawing.

Kerke (科尔克) screw elements and barrels

Kerke machines are used in compounding and masterbatch applications. Replacement elements, kneading blocks, barrel liners and shafts can be assessed from the machine model, part number or physical sample. Dimensional inspection can be provided for each production batch.

Cowin twin-screw extruder parts

Cowin offers co-rotating twin-screw equipment, including CHT series machines. EXTRUTEX can assess screw elements, kneading blocks, shafts and barrel sections according to the machine's original dimensions. The exact CHT model and screw configuration are required before confirming fit.

XINDA twin-screw extruder parts

XINDA manufactures modular co-rotating twin-screw extruders, including PSHJ and SHJ platforms. Its screw and barrel systems use configurable processing elements. EXTRUTEX can assess replacement elements and barrel components when the machine model, shaft details and element arrangement are available.

Screw Element Types Available

Conveying elements

Conveying elements move material along the screw channel. Their pitch, flight depth, length and orientation affect conveying capacity, filling behaviour and residence time. Replacement elements must reproduce the intended geometry and shaft connection.

Kneading blocks

Kneading blocks are assembled from discs with defined thicknesses and stagger angles. They are used for melting, dispersive mixing, distributive mixing and compound homogenisation. EXTRUTEX can manufacture replacement blocks to the required disc arrangement and dimensions.

Mixing elements

Mixing elements are designed to distribute additives, improve material uniformity and support specific processing tasks. Their geometry varies between machine families and process configurations.

Reverse and restrictive elements

Reverse elements and restrictive conveying components can increase filling and mixing intensity by changing the material flow. Their geometry and position are important to the process, so replacement parts should follow the original screw configuration.

Screw shafts

Screw shafts transfer torque from the gearbox to the modular screw elements. The spline or other coupling geometry, shaft length, root dimensions and fit are critical. EXTRUTEX can manufacture replacement shafts to confirmed drawings or approved samples.

Barrel sections and liners

Barrel sections contain the screw channels and establish the working clearance around the screw elements. EXTRUTEX can assess closed barrels, open barrels, vent barrels, feed sections and replaceable liners according to the original machine design.

Materials for Wear-Resistant Screw Elements

Material selection depends on the polymer, filler loading, process temperature, corrosion exposure, screw speed and required service life. A material suitable for an unfilled polymer may not be appropriate for glass-fibre or mineral-filled compounds.

Material selection should be confirmed against the application and the original component requirements. The grade name alone does not define the complete heat-treatment condition, hardness, case depth or final service performance.

How EXTRUTEX Confirms Screw Element Compatibility

Before production, EXTRUTEX checks the relevant mechanical dimensions and screw geometry. This helps prevent the common mistake of manufacturing a part based only on the machine brand or nominal screw diameter.

Reverse Engineering from Worn Original Parts

An OEM drawing is useful, but it is not the only way to identify a replacement screw element. EXTRUTEX can inspect a physical sample and reconstruct its dimensions when the original drawing or part number is unavailable.

For a worn component, the inspection may include:

• Measurement of the shaft spline and internal connection.
• Measurement of the outside diameter and element length.
• Inspection of the flight lead, pitch and profile.
• Measurement of the original stagger angle for kneading blocks.
• Comparison with adjacent screw elements where available.
• Review of the barrel bore and centre distance when required.

Severely worn parts may no longer retain their original dimensions. In such cases, a shaft drawing, an unworn neighbouring element, a matching screw assembly or the barrel drawing can help establish the correct geometry. EXTRUTEX will identify any dimensions that require confirmation before manufacturing.

Dimensional Inspection and Quality Control

Replacement components need to fit the existing screw assembly and operate within the required mechanical clearances. EXTRUTEX applies dimensional inspection to the agreed production specifications.

• CMM measurement of specified critical dimensions.
• Verification of outside diameter and element length.
• Inspection of spline or shaft connection geometry.
• Checking of flight pitch and relevant profile dimensions.
• Material and heat-treatment records according to the agreed order specification.
• Dimensional report for each production batch.
• EN 10204 3.1 documentation on request, subject to material traceability and availability.

The inspection report can be prepared around the dimensions agreed before production. If a customer has an OEM drawing with defined tolerances, those tolerances should be supplied with the enquiry.

Single Screw Elements or Complete Replacement Sets

EXTRUTEX can supply individual components or larger replacement packages. The right purchasing approach depends on the condition of the screw assembly and the maintenance schedule.

How to Request a Replacement Screw Element Quotation

For an initial technical assessment, send the machine model, element position and either the OEM part number or a photograph of the original component with a ruler or scale. More detailed drawings help shorten the confirmation process.

1. Identify the machine: Provide the manufacturer, exact model, screw diameter and machine serial number if available.
2. Identify the component: State the element position on the left or right shaft and provide its part number if known.
3. Send a drawing or sample: Include the OEM drawing, a dimensioned sketch or clear photographs with a scale.
4. Confirm the material: Tell us the polymer, filler type and operating conditions where possible.
5. Review the technical confirmation: Confirm the dimensions, material, tolerances and inspection requirements before production.

If the original part is too worn to measure reliably, provide the shaft drawing, adjacent screw elements or barrel bore dimensions. EXTRUTEX can advise which additional measurements are needed.

Frequently Asked Questions

Contact EXTRUTEX for Twin-Screw Extruder Replacement Parts