A wide variety of drive arrangements can bemounted inside this apparatus. Based around a rigid, sturdy frame each drivearrangement can easily be interchanged and fixed into position. Bearing blocksensure excellent and repeatable alignment of the drives as well as smoothrunning. The base frame allows for accurate meshing of the drives. The drivearrangements available include dual belt drive, chain drive with tensioner andspur gear train, dual spur gear, compound bevel gear and spur gear, compoundworm / wheel gear and bevel gear, rack and pinion with a spur gear drive. Eachof the drives is made from durable, long life materials, and conforms toindustry standards giving the student a practical knowledge of the arrangementthey may use in industry.