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Products | Theory of Machines and Properties of Materials | Statics | TM 120

TM 120

Bell Crank Lever

Technical Description

The unit is used to demonstrate the term "torque" and for demonstrating the application of moment. The main element of the unit is a simple crank made of metal. This is fitted in low friction ball bearings so that it can rotate freely and is zeroed using a compensation weight. A metal weight can be hung at any position on the long crank arm. This makes it possible to continuously select the mechanical advantage. A measuring scale integrated into the crank provides information on the distance of the weight from the the axis of rotation. The force on the short crank arm is displayed directly on a dial gauge. The application of the load deflects the crank. This deflection is compensated with an adjustment device such that the forces always act vertically on the crank.

Learning Objectives / Experiments

· Lever principle and application of moment with variable mechanical advantage demonstrated on a crank

Features

With compensation device for adjusting the crank so that the forces always act vertically

Alternative products

EM 049 -- Simple Moments Apparatus
TM 110 -- Apparatus for Statics Experiments

Specification

[1] Strong table unit for demonstrating the application of moment to a crank lever
[2] Pressure gauge 50N
[3] Metal crank mounted in ball bearings
[4] Mechanical advantage min. 1:1, max. 2:1
[5] Fine compensation device for adjusting the crank so that the forces always act vertically
[6] l x w x h 600x250x350mm

Technical Data

Mechanical advantage: min. 1:1, max. 2:1
Crank length, vertical: 200mm
Crank length, horizontal: 400mm
Dynamometer: max. 50N, display Ø114mm
Set of weights: up to 20N, 6 weights with carrier

Dimensions and Weight

l x w x h : 600 x 250 x 350 mm
Weight : approx. 19 kg

Scope of Delivery

1 base plate with crank, 1 dynamometer,
1 set of weights, 1 instruction manual

Order Details

040.12000 TM 120 Bell Crank Lever