Nook Industries, Inc. External Belt Driven Linear Actuator ELFZ 125

This unit consists of an aluminium square profile with hardened steel guide rods. The carriage has internal linear ball bearings that can be adjusted free of play and is driven along the guide rods by a timing belt. The rotating timing belt pulleys have maintenance-free ball bearings. One rotation of the drive pulley results in a linear movement equal to half of the drive pulley circumference. Belt tension can be readjusted by a simple tensioning device in one of the carriages. This device can also be used for symmetrical adjustment of two or more linear units running parallel.