EXTRUTEX Extruder Gearboxes – Standard, Replacement & Special Design Solutions

High-Performance Gearboxes for Plastic Extrusion Machinery

EXTRUTEX supplies gearboxes for plastic extrusion machinery, including single-screw extruders, parallel twin-screw extruders, conical twin-screw extruders, profile extrusion lines, pipe extrusion lines, sheet extrusion lines, compounding systems, recycling extruders and other special-purpose extrusion equipment.

With more than 25 years of extrusion engineering experience, EXTRUTEX can provide both standard industrial gearboxes and specially designed gearbox solutions according to the technical requirements of individual extrusion machines.

Our gearbox supply network includes established European and international manufacturers, including German FLENDER, Austrian Eisenbeiss, Henschel, NSK and selected Chinese gearbox manufacturers. Depending on the application, required performance, installation dimensions, delivery requirements and budget, EXTRUTEX can recommend and supply an appropriate gearbox solution.

Whether a customer needs a new gearbox for a new extruder, a replacement gearbox for an existing machine, a gearbox for an older or discontinued extrusion line, or a completely customized transmission system, EXTRUTEX can support the engineering and selection process.

Gearbox Solutions for Extruders

The gearbox is one of the most important mechanical components of an extrusion machine. It transfers the motor power to the screw while reducing speed and increasing torque according to the extrusion process.

A correctly selected gearbox must match the motor power, screw speed, screw diameter, required torque, extrusion material, production capacity, operating conditions and mechanical configuration of the extruder.

EXTRUTEX therefore does not treat gearbox selection as simply matching a motor power to a gearbox model. Our engineers evaluate the complete extrusion application to determine a suitable transmission solution.

Our gearbox solutions can be used for:

• Single-screw plastic extruders

• Parallel twin-screw extruders

• Conical twin-screw extruders

• PVC profile extruders

• PVC pipe extruders

• PE and PP pipe extruders

• PPR and PEX extrusion lines

• Sheet and board extrusion

• WPC extrusion

• Compounding extruders

• Recycling and reprocessing extruders

• High-speed extrusion applications

• High-torque extrusion applications

• Special-purpose extrusion machinery

• Replacement and modernization projects

Major Gearbox Brands and Supply Partners

EXTRUTEX works with established gearbox manufacturers and suppliers from Europe and Asia, allowing customers to select solutions according to application, performance requirements and project budget.

German FLENDER

FLENDER is one of the well-known German transmission technology manufacturers and is widely used in industrial machinery.

EXTRUTEX can supply FLENDER gearbox solutions for suitable extrusion and industrial applications, subject to model, availability and technical requirements.

Austrian Eisenbeiss

Eisenbeiss, based in Austria, has extensive experience in industrial gearbox and transmission technology.

EXTRUTEX can supply Eisenbeiss gearbox solutions for demanding extrusion applications where high torque, reliability and long-term operation are important considerations.

Henschel

Henschel transmission technology can also be considered for appropriate extrusion machinery and replacement applications.

NSK and Other Established Components

EXTRUTEX can also source NSK and other internationally recognized mechanical and bearing-related components, depending on the gearbox construction and project requirements.

Chinese Gearbox Manufacturers

For projects where cost competitiveness, customization or rapid manufacturing are important, EXTRUTEX can also supply gearboxes from selected Chinese manufacturers.

Chinese gearbox solutions can be engineered for specific extrusion applications and can provide an economical alternative for new machinery, replacement projects and customized equipment.

The final manufacturer and gearbox configuration are selected according to the actual technical requirements of each project.

Customized Gearbox Design for Extruders

One of the important advantages of EXTRUTEX is our ability to provide special gearbox engineering for extrusion machinery.

Not every extrusion machine can use an off-the-shelf gearbox.

Older extrusion lines, special screw configurations, unusual installation dimensions, high-torque applications and customized machinery may require a gearbox with a specific:

• Input shaft

• Output shaft

• Shaft diameter

• Center distance

• Reduction ratio

• Mounting configuration

• Flange configuration

• Rotation direction

• Torque capacity

• Output speed

• Motor connection

• Screw connection

• Housing dimensions

• Bearing arrangement

• Lubrication system

• Cooling system

EXTRUTEX engineers can evaluate these requirements and develop a suitable gearbox specification.

For replacement applications, customers can provide the available gearbox information, photographs, drawings, nameplate information or machine specifications. Our engineering team can then evaluate the existing configuration and determine a suitable replacement or redesigned solution.

Replacement Gearboxes for Existing Extruders

EXTRUTEX also specializes in replacement gearbox solutions.

Many extrusion machines remain mechanically useful for many years, but their original gearbox may eventually become unavailable, damaged or uneconomical to repair.

In such cases, replacing the complete extrusion machine may not be necessary.

EXTRUTEX can investigate the existing transmission system and provide a replacement gearbox based on the available technical information.

Replacement gearbox projects can include:

• Old extrusion machines

• Discontinued gearbox models

• Imported extrusion machinery

• European extrusion machinery

• Chinese extrusion machinery

• Used extrusion lines

• Customized extrusion machines

• Gearboxes with damaged gears

• Gearboxes with worn bearings

• Gearboxes with excessive backlash

• Gearboxes with lubrication problems

• Gearboxes requiring modernization

Where possible, the replacement gearbox can be designed to maintain the existing machine’s installation dimensions and screw connection, reducing the amount of modification required during installation.

Gearbox Solutions for Single-Screw Extruders

EXTRUTEX supplies gearboxes for single-screw extruders used in the production of:

• PE pipes

• PP pipes

• PPR pipes

• PEX pipes

• PVC pipes

• PVC profiles

• Window and door profiles

• WPC profiles

• PVC sheets

• Plastic sheets

• Boards

• Cable compounds

• Other thermoplastic products

The gearbox can be selected according to screw diameter, screw speed, motor power, required torque and production capacity.

For high-output extrusion machines, special attention is given to torque capacity, bearing arrangement, thermal management and continuous-duty operation.

Gearboxes for Twin-Screw Extruders

EXTRUTEX also supplies gearboxes for parallel twin-screw and conical twin-screw extrusion systems.

Twin-screw extrusion requires a transmission system capable of handling the mechanical loads generated by two intermeshing screws.

Depending on the machine design, the gearbox may incorporate:

• High-torque transmission

• Parallel output shafts

• Thrust-bearing systems

• Screw synchronization

• Specialized output shaft design

• High-load bearing arrangements

• Optimized lubrication

• Oil cooling

• Customized screw connection

These gearboxes can be used for PVC processing, compounding, masterbatch production, WPC, recycling and other demanding extrusion applications.

High-Torque Gearboxes

Modern extrusion processes increasingly require high production output and higher screw torque.

High-torque gearboxes are particularly important for applications involving:

• High screw filling

• High-output extrusion

• Compounding

• Recycling

• Filled polymers

• Engineering plastics

• Wood-plastic composites

• Mineral-filled compounds

• Calcium carbonate-filled materials

• Highly loaded formulations

EXTRUTEX can specify high-torque transmission systems according to the required operating conditions rather than simply selecting a gearbox based on motor power.

Gearbox Engineering Based on the Complete Extrusion System

A gearbox should be considered as part of the complete extrusion system.

EXTRUTEX engineers can evaluate the relationship between:

Motor → Coupling → Gearbox → Screw → Barrel → Die → Downstream Equipment

This approach helps ensure that the gearbox is suitable for the actual machine rather than being selected independently.

Important parameters include:

Motor Power

The gearbox must be suitable for the continuous motor power and expected operating conditions.

Screw Speed

The required output speed determines the appropriate transmission ratio.

Torque

Torque is one of the most important parameters in gearbox selection, particularly for twin-screw, compounding and high-output applications.

Screw Diameter

Screw diameter and geometry influence the required mechanical load and operating speed.

Material

Different materials and formulations can generate different extrusion loads.

Production Capacity

Higher production rates may require higher torque and more robust transmission components.

Operating Hours

Continuous industrial production requires a gearbox designed for appropriate service conditions and operating life.

Installation Dimensions

For replacement applications, available space and existing mounting points are critical.

Special Gearboxes for Customized Extrusion Machinery

EXTRUTEX can also provide gearbox solutions for non-standard extrusion equipment.

Special designs may be required when:

• The original gearbox is no longer available

• The customer wants to increase production capacity

• The extruder has been modified

• A larger motor is installed

• Screw speed needs to be changed

• The original gearbox has unusual dimensions

• The machine uses a special screw configuration

• The gearbox must fit an existing frame

• A special shaft connection is required

• The customer is developing a new extrusion machine

In these cases, EXTRUTEX can work with the machine builder or end user to establish the required gearbox specifications.

Gearbox Stock and Fast Replacement Solutions

EXTRUTEX maintains access to a range of gearboxes, transmission components and replacement parts, including products from recognized European and international manufacturers.

Availability depends on model and current stock, but our supply network allows us to search for suitable replacement solutions when customers need to repair or restart an existing extrusion line.

For urgent replacement projects, customers can provide:

• Existing gearbox nameplate

• Manufacturer and model

• Motor power

• Screw diameter

• Screw speed

• Photographs

• Gearbox drawings

• Shaft dimensions

• Mounting dimensions

• Existing machine model

Our technical team can use this information to identify a suitable gearbox or determine the specifications required for a customized replacement.

25 Years of Extrusion Engineering Experience

The major advantage of EXTRUTEX is not only the ability to supply a gearbox.

Our engineering team has more than 25 years of experience in plastic extrusion technology, including extrusion machinery, screws and barrels, dies, downstream equipment, compounding systems and complete extrusion lines.

This experience allows us to understand the operating environment in which the gearbox will be installed.

A gearbox selected for a general industrial application is not necessarily the correct gearbox for a plastic extruder.

Extrusion equipment often operates continuously under significant mechanical load, and the transmission system must work reliably together with the motor, screw and complete extrusion process.

EXTRUTEX therefore combines gearbox sourcing, technical evaluation and extrusion engineering to provide a more complete solution.

Applications

EXTRUTEX gearbox solutions are suitable for a wide range of plastic and polymer processing applications, including:

• PE pipe extrusion

• PP pipe extrusion

• PPR pipe extrusion

• PEX pipe extrusion

• PVC pipe extrusion

• CPVC extrusion

• UPVC profile extrusion

• PVC window and door profiles

• WPC extrusion

• PVC sheet extrusion

• Plastic board extrusion

• Plastic compounding

• Polymer compounding

• Masterbatch production

• Plastic recycling

• Reprocessing extrusion

• Filled polymer extrusion

• Engineering plastic extrusion

• Cable compound extrusion

• Special polymer processing equipment

Why Choose EXTRUTEX Gearbox Solutions?

Experienced Engineering Team

More than 25 years of extrusion engineering experience supports gearbox selection and customization.

European and International Supply

Access to gearbox manufacturers and partners from Germany, Austria, China and other international sources.

Standard and Customized Solutions

We can supply both standard gearboxes and special designs for unusual extrusion machinery.

Replacement Support

Existing and older extrusion machines can be evaluated for gearbox replacement or modernization.

Application-Based Selection

Gearbox selection is based on motor power, torque, speed, screw configuration, production requirements and installation conditions.

New Machine Projects

EXTRUTEX can specify suitable gearbox solutions as part of a new extrusion machine or complete extrusion line.

Cost-Optimized Options

Customers can select from premium European solutions and competitive international alternatives according to project requirements.

Technical Information Required for Gearbox Selection

To select or design a suitable gearbox, customers are recommended to provide as much of the following information as possible:

Machine Type: Single screw / parallel twin screw / conical twin screw / special extruder

Screw Diameter: mm

Number of Screws: 1 / 2 / special

Motor Power: kW

Motor Speed: rpm

Required Screw Speed: rpm

Required Torque: Nm, if available

Reduction Ratio: if known

Screw Center Distance: for twin-screw machines

Screw Connection: existing shaft or special connection

Mounting Dimensions: if replacement is required

Rotation Direction: clockwise / counter-clockwise

Operating Conditions: continuous / intermittent

Processing Material: PE / PP / PVC / CPVC / PPR / PEX / WPC / engineering plastics / recycling / other

Production Capacity: kg/h

Existing Gearbox Brand and Model: if applicable

Photos and Nameplate: highly recommended for replacement projects

Providing accurate technical information allows EXTRUTEX engineers to determine the appropriate gearbox specification more efficiently.

EXTRUTEX Gearbox Supply & Engineering

EXTRUTEX provides more than a gearbox catalogue.

We provide transmission solutions designed around extrusion machinery.

From a standard gearbox for a new single-screw extruder to a high-torque transmission for a twin-screw compounding system, or a completely customized replacement for an older extrusion line, our engineers can evaluate the application and recommend a suitable solution.

Our supply capabilities include German FLENDER, Austrian Eisenbeiss, Henschel, NSK-related components, selected Chinese gearbox manufacturers and other international sources, depending on the project.

With more than 25 years of extrusion engineering experience, EXTRUTEX can support customers from gearbox selection and technical evaluation through customized design, manufacturing coordination and replacement applications.

EXTRUTEX — Extrusion Engineering, Gearbox Technology & Customized Transmission Solutions.

Contact EXTRUTEX with your extruder model, motor power, screw diameter, screw speed, gearbox model or gearbox photographs, and our engineering team can evaluate the required transmission solution.

Product Highlights

• Extruder gearboxes

• Single-screw extruder gearboxes

• Twin-screw extruder gearboxes

• Parallel twin-screw gearboxes

• Conical twin-screw gearboxes

• High-torque extrusion gearboxes

• High-speed extrusion gearboxes

• Custom-designed gearboxes

• Replacement gearboxes

• European gearbox brands

• German FLENDER

• Austrian Eisenbeiss

• Henschel

• NSK

• Chinese gearbox manufacturers

• New extrusion machine applications

• Existing machine modernization

• Plastic extrusion transmission systems

• 25+ years of extrusion engineering experience

• Technical gearbox selection and engineering