Friction Wheel Drive Mechanical Demonstration Set Subcategory_Rulers and Measuring Rotary-knob resistance substitution board offering

Rotary-knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections

Complete set of sixteen tooth-type models at 2x life size supports full-dentition dental anatomy teaching

holding under at least 100 Newtons of separation force after hand-evacuation of the air between them

and inner components

Designed to harvest plenty of light through a 100mm aperture

Friction Wheel Drive Mechanical Demonstration Set Subcategory_Rulers and Measuring Rotary-knob resistance substitution board offeringHand cranked friction wheel drive sandwiched between clear acrylic plates, showing how contact friction alone transmits rotation from one wheel to another in mechanical systems.