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

Details:

Motion converter easily demonstrates how rotational motion can be converted into the linear motion. Made of particle board and wooden blocks. Consists of two wooden gears and a hand crank.Durable construction makes this model ideal for classroom use. No assembly required. Includes an instruction manual to facilitate use of the apparatus by students and teachers.Gears are 4.75" in diameter. Mounted to a base measuring 15.25" x 2.75"