This unit is designed to determine the time period of spiral spring and its frequency. Spiral spring is a type of spring which is formed by a metallic strip wound around a rod at same point.
The apparatus consists of a shaft on which the spiral spring is attached. A metallic rod, containing masses at its edges, is used to deflect the shaft. The deflection can be measured through a protector and the extent to which the spring was deflected initially can also be found.
 Investigation of vibrations on a spiral spring-rotating
 Axis mounted on ball bearings
 2 levers with sliding weights
 Spiral spring
 Integrated angle measuring scale mounted on axis
 Wall mounting plate made of anodised aluminium
– stiffness: c=238Nmm
– cross-section: 10x1mm
– effective length: approx. 800mm
– inside radius: 10mm
– outside radius: 50mm
Weights made of stainless steel
– mass: 0.5kg
– diameter: 50mm
Levers made of stainless steel
– diameter: 8mm
– length: 154mm
– arm radius of the rotating mass: 36…150mm
Angle measuring scale
– resolution: 1°
– wxh: 200x250mm
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