This series of gear reducers with attached or integrated thrust bearing can be supplied in a helical or bevel helical gear arrangement. Quiet operation and strong design are key features. Horizontal or vertical mounting position, splash lubrication and cooling coil or injection lubrication are possible options. The modular design of the POSIREX is based on the POSIRED 2 range, plus a selection of available thrust-bearing parts.
Technical Data:
Torque (T2 nominal): 3,000 up to 800,000 Nm
Transmission Ratio: 4 up to 160 iN
Axial force: F = 50 up to 2,000 kN
Double shaft extruder gears have been built by PIV Drives since 1984 for a variety of applications in the plastics and food industries. This product is in operation around the world to the complete satisfaction of our customer base. The gearing is case hardened and ground with a profile correction for optimal load-bearing performance and noise reduction. An extremely quiet gear-train is achieved through a high contact ratio. The axial forces which occur during the extrusion process are safely absorbed through a system of tandem bearings and self-aligning roller thrust bearings.
Technical Data:
Screw centre distance: a = 15 up to 200 mm
Input speed: up to 1,800 rpm
Torque factor: df = 35 Nm/cm3
Power: up to 5,500 kW
The new series of helical gear units has been studied and designed specifically for use on systems for the SINGLE-SCREW EXTRUSION of various materials, such plastic, rubber, etc.
Our range includes two-stage reduction units, PBE series, with a nominal reduction ratio ranging between 6.3 and 28, and three-stage reduction units, PCE series, with a nominal ratio ranging between 8 and 125.
By being able to have the same reduction ratios 8÷28 on both series either solution can be chosen for the same application, depending on the dimensions and version required.
For all sizes, the housings of the gear units are built in G25 grey cast iron, suitably dimensioned for heavy duty work. They are suitable for mounting both horizontally and vertically.
The output flange, housing the thrust bearing and used for mounting the extrusion screw, is integrated in the housing cast.
The thrust bearing fitted on the low-speed shaft is the 294__E type and dimensioned for heavy duty working conditions.
In the standard version, screw keying is done with a feather key but it may also be done with a grooved profile, according to the most common standards in force.
