HTM3 Worm and Wheel (30 : 1 ratio)

HTM3 Worm and Wheel (30 : 1 ratio)

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

HTM3 Worm and Wheel (30 : 1 ratio)
  • 5N 'EFFORT' hanger and 1N 'LOAD' Hanger
  • Wall mounted
  • Effort pulley effective diameter Ø97mm
  • Load pulley effective diameter Ø97mm
  • Worm and Wheel centre distance 65mm
  • To mount at least 1500mm above floor
  • Weights setComprehensive instruction manual provided
  • 2 year warranty
  • Experimental determination of velocity ratio and comparison with calculated value
  • Determination of EFFORT with variation of load
  • Determination of friction with variation of load
  • Determination of efficiency with variation of load
  • Determination of limiting efficiency of the machine