The ideal standardized motorbase for smaller belt drives with electric motors from 0.75 to 4.0 kW (frame size dimensions 90 S/L to 112 M). This base is delivered completely assembled. Thanks to its extremely compact overall dimensions, the type MB 27 can be installed everywhere without any major design changes. Therefore, the MB 27 is an ideal alternative to obsolete, non-automatic tension rails. The pretensioning device with its left and right-hand thread gives a big positioning range offering an optimum adaption of the working angle to the driven pulley. All steel parts are painted with a blue primer.