Gear reducers bearings

Eig. 1. Parts of an extmder A, screw B, barrel C, heater D, thermocouple E, feed throat E, hopper G, thmst bearing H, gear reducer 1, motor , deep channel feed section K, tapered channel transition section and L, shallow channel metering section (15). 

Figure 2 — Extending agitator shaft to bearing, and using a fluid coupling between motor and gear reducer, prevents damage...

Figure 286. Phantom drawing of a modern roller press showing important design criteria such as self-aligning roller bearings, cooled rollers, multiple-screw feeder with central (vertical) feed position, hydraulic pressurizing of floating roller with gas accumulator, automatic grease lubrication, and double output-shaft gear reducer. (Courtesy of Kdppern, Hattingen, FRG)...

Polymeric material (in the form of pellets) is fed into the extruder s hopper and thence to the screw channel. The screw, driven by a motor through a gear reducer, rotates in a hardened barrel. A thrust bearing absorbs the rearward thrust... 

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