Applied Mechanics Laboratory Equipment

Slotted Link Mechanism Apparatus

The demonstration model is used to generate and investigate pure harmonic reciprocating motion. An anodised aluminium disc used as crank is mounted on ball bearings on a white plate. This disc has a pointer so that the input angle can be exactly read on the integrated angle measuring scale. The crank pin can be set at different radii on the disc. The slider crank is attached to the crank pin on one side. On the other side the pin is mounted in straight guide that is fitted with a ruler to allow the output stroke to be read off with precision. The model is equipped with plastic feet and is placed on the laboratory table for the experiment. Two metal handles make the unit easier to carry.


Learning Objectives / Experiments

– Conversion of smooth rotary motion into a purely harmonic reciprocating motion

– Influence of crank length and input angle on the output stroke

Slotted Link Mechanism


[1] Demonstration and laboratory experiment on harmonic reciprocating motion

[2] Aluminium crank disc, anodised, 3 different crank radii

[3] Anodised slider crank with 3 different output strokes

[4] Integrated angle measuring scale and ruler

[5] lxwxh 380x280x100mm


Technical Data

Crank radius- 25mm

                     – 37.5mm

                     – 50mm


Output stroke- 50mm

                        – 75mm

                        – 100 mm


Dimensions and Weight

l x w x h : 380 x 280 x 100mm

Weight : approx. 3 kg

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