The THEORY of MACHINES range enables clear and comprehensive learning of and topics. An understanding of the way in which forces act and react, is fundamental when studying the application of loads on a variety of fixed structures and rotating machinery. The THEORY of MACHINES form a comprehensive range of equipment, equally suitable for demonstration and experimental work.

All the THEORY of MACHINES hardware operates in a standalone mode, with a large number being supplied with Data Acquisition Software.

HTM38 Disc Brake Apparatus

To carry out experiments to investigate the relationship between the normal force acting on the brake pads, the effective radius of the brake pads and the braking torque.

HTM66 Static and Dynamic Balancing vibration

A self-contained bench top unit for the analysis of static and dynamic balancing of masses on shafts. Students learn about static and dynamic balancing, force polygons, couple polygons and vectors.

HTM71 Governors Apparatus

Bench top apparatus to demonstrate the principle of operation of various centrifugal governors of Porter, Proell and Hartnell form. A speed controlled vertical shaft allows the governors to rotate in a vertical plane, with the speed of rotation displayed on a digital meter. Students can observe the effect of speed of rotation, lifted mass, rotating mass and geometry on the lift of the governor. From this the sensitivity of each governor can be recorded and observed. The sleeve mass of the Porter and Proell governor can be adjusted by the weights set supplied. The Hartnell governor sleeve can be adjusted by the different springs supplied. Students plot graphs and record lengths, masses and distances for each governor. A transparent safety guard provides protection against the rotating parts.

HTM73 Gear Assembly Unit Combined Drives

Based around a rigid, sturdy frame a variety of drive arrangements can easily be interchanged and fixed into position. Bearing blocks ensure excellent, repeatable alignment of the drives along with smooth running. The drive arrangements include dual belt drive, chain drive with tensioner, spur gear train, dual spur gear, compound bevel gear and spur gear, compound worm / wheel gear and bevel gear, rack and pinion with a spur gear drive. A cranked handle operates the drives giving more control and feel for each drive arrangement. The layout of the drives gives an excellent visual indication of motion, direction, velocity, and mechanical action.

HTM78 Four Bar Chain

A sturdy bench top base, with mounting feet and carry handles, incorporates a disc mounted on ball bearings as a crank. The disc has a protractors angle scale so that the rotational angle can be accurately viewed and measured. The crank pin connecting the crank to the disc can be set at different radii on the disc. The connecting rod and the oscillating lever are connected together in different lengths using quick-fit bolts.

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