Single Screw Extruders
  • Overview
  • Technical data
  • Screw design

Built to meet rigid manufacturing standards

C.W. Brabender® Laboratory Extruders are built to meet rigid manufacturing standards. They must provide close test reproducibility in order to act as measuring heads to the Plasti-Corder® torque rheometer, a precision instrument. Their output depends on testing variables such as, melt temperature, extrusion material, screw and die design, rpm, pressure and feeding.

Sixteen standard models include L/D ratios of 10:1, 15:1, 20:1, 25:1, and 30:1. Different models provide alternate methods of heating and cooling. Temperature regulation on each is performed by a corresponding Brabender® Control Console or Circulator System.


• Laboratory Sample Preparation
• Polymer Throughput Studies
• Product Development
• Processability Studies
• Pressure Tests
• Extrusion Profiles
• Small Scale Production Processing

The 416 stainless steel, honed and nitrided barrels are manufactured in various L/D ratios. The extruders are equipped with two ports near the screw tip for either a transducer or a stock temperature thermocouple, and a rupture safety plug. Barrels can be supplied with grooves for improved shearing and positive transport of material in the extruder. Other designs and alloys can be provided for special applications.

Additional images

1-1/4 in. single screw extruder 3/4 in. single screw extruder Display of single screws

click pictures to magnify


Screw Diameter Screw Torque Operating Temperature PSI
1/2" 50 Nm (5,000 mg) 400 °C 10,000
3/4" 120 Nm (12,000 mg) 400 °C 10,000
1-1/4" 240 Nm (24,000 mg) 400 °C 10,000
L/D Ratio Screw Design
10:1, 15:1, 20:1, 25:1, 30:1 1:1 up to 5:1 Compression Ratio
20:1, 25:1, 30:1 Metering Screw
20:1, 25:1, 30:1 Single Stage Mixing Screw
20:1, 25:1, 30:1 Dual Stage Mixing Screw
20:1, 25:1, 30:1 Nylon Screw
25:1, 30:1 * Venting Screw
25:1, 30:1 * Venting/Mixing Screw
* Also Available for 1-1/4” 20:1 L/D Ratio
Other mixing screw geometries available -- consult manufacturer.
...where quality is measured.