This high quality example of an industry standard worm and wheel pairing is built on a substantial wall mounted bracket for vertical mounting. The worm and wheel pair has a single start and a ratio of 30:1. The worm and wheel are positioned a set distance apart to mesh correctly. Both parts run in bearings with the worm operating with an additional thrust bearing.
Attached to the end of the worm is a pulley (EFFORT) of known effective diameter. This pulley helps exert the effort to raise a load. A cord is wrapped around its periphery and terminates in a load hanger for applying effort load. Attached to the front of the wheel is another pulley (LOAD) of known effective diameter. This pulley is used for the loading of the system. Again a cord is wrapped around its periphery and terminates in a load hanger. This hanger helps exert the loading onto the system via the weights set provided.
Students add the weights to the LOAD and apply a suitable weight to the EFFORT in order to raise the load. From this students record the weight values and ultimately calculate the efficiency, mechanical advantage and friction of the system.
A comprehensive instruction manual for lecturer and student, giving full details on apparatus assembly and operation as well as example results. All necessary assembly and operational tools are provided.
Optional accessories: HAC14