* Elastic torsion of a bar1
* Round bar, tube, longitudinally slotted tube and square tube as test bars1
* Indication of the angle of twist at two random points on the bar
Torsion occurs primarily on axles and drive shafts in motor vehicles and machines. The torsion occurring in the shaft cause cross-sections of the shaft to be pushed together around the longitudinal axis. When a torque is applied to a circular shaft the cross-section remains flat and no warpage occurs.
In the event of minor torsion the length and radius remain unchanged. The straight lines on the outer circumference of the shaft running parallel to the axis become helixes. Non-circular cross-sections mostly result in warpage.
Sci-tech Torsion of Bars apparatus Model Mt 038 investigates the torsion of a bar under a torque.
The bar is clamped into two movable bearing blocks by a chuck.
 elastic torsion of bars
 2 movable bearing blocks with clamping chuck for mounting of bars, 1 fixed and 1 movable
 2 movable angle indicators can be clamped to the bar
 4 bars: round bar with full cross-section, tube, longitudinally slotted tube, square tube
 application of load to the bar by a mass disc, a deflection roller and a set of weights
 storage system to house the components
 experimental set-up in the standard frame
4 brass bars, l=695mm
– round bar, d=6mm
– tube, slotted tube
d=6mm, wall thickness: 1mm, slot width: 0,3mm
– square tube
WxH: 6mm, wall thickness: 1mm
Disc to apply the load
– effective radius: 110mm
– measuring range: -90°…+90°, graduations: 1°
– 1x 1N (hanger)
– 4x 1N
– 3x 5N