Abstract: A safety guard assembly for enclosing a flexible drive extending between a driving shaft and a driven shaft is provided. The safety guard assembly includes: a back cover having at least two slidably engageable back cover members for varying a length of the back cover, the back cover having at least two shaft openings extending therethrough for receiving a respective one of the driving shaft and the driven shaft therein; and a front cover having at least two slidably engageable front cover members for varying a length of the front cover, the front cover being securable to the back cover for defining an enclosure for the flexible drive. A method for enclosing a transmission mechanism including a flexible drive extending between a driving shaft and a driven shaft is also provided.