Screw Model, Square top allows easy measurement of the distance screw top is turned compared to its distance into the board., Each

Details

This motion converter easily demonstrates how rotational motion can be converted into linear motion. Made from particle board and wooden blocks, it consists of two wooden gears and a hand crank. Its durable construction makes this model ideal for classroom use. No assembly is required. An instruction manual is included to facilitate the apparatus' use by students and teachers. The gears are 4.75 inches in diameter and are mounted to a base measuring 15.25 inches x 2.75 inches.