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

5-inch funnels and adjusts up to 17 inches in height for the chemistry bench

heating the bar until it no longer passes through the opening and contraction returns it

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

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.