The FRICTION range enables clear and comprehensive learning of FRICTION and TRIBOLOGY covering a variety of theories and topics. An understanding of the way in which Friction acts is  fundamental when studying the application of loads on a variety of surfaces. The FRICTION range forms a comprehensive set of equipment, from simple inclined planes to complete Tribology Trainers suitable for demonstration and experimental work.



HFN1 Friction on an Inclined Plane

The compact bench top unit has a sturdy base plate, non-slip feet and centravertical pillar.

HFN1c Tray mounted on bearing for HFN1

HFN1c Tray mounted on bearing for HFN1 

HFN3 Clutch Plate Friction Apparatus

The wall mounted apparatus comprises a lower stationary plate attached to a sturdy wall mounting bracket. On top of this stationary plate sits an upper plate whose shaft rotates in ball bearings. Sandwiched between the lower and upper plates are three interchangeable friction discs of different diameters. Each one sits onto location pins in the lower plate. The minimum force on the friction disc is the self weight of the upper plate, but the contact pressure can be increased by adding weights to the upper plate. Pure torque is applied to the upper plate through two loaded cords and pulleys. The cords wrap around a groove in the upper plate. A set of calibrated weights and load hangers are supplied which enable the loading force to be varied and applied torque to be adjusted also.

HFN4 Pivot Friction Apparatus

The wall mounted apparatus consists of a rotating circular table on a vertical shaft at the bottom of which a variety of end pivots can be attached. The table rotates on an interchangeable seating selected to match the conical angle of the pivot. Pure torsion is applied to the table by a pair of cords diametrically opposite on its periphery and passing over pulleys to load hangers. The standard apparatus is supplied with four sets of pivots with vertex angles of 60° 90° 120°and 180° (flat). The seating is in mild steel and the pivot is in brass. In addition a ball thrust bearing is included to show the difference in performance. Students can study the effect of the conical angle of a pivot bearing and obtain the coefficients of friction for bearings of different design. All load hangers and calibrated weights are supplied.

HFN5 Journal Friction Apparatus

This apparatus is designed to determine the friction torque in a plain journal bearing under varying conditions of load, speed and lubrication. The ground steel journal shaft is driven by a variable speed electric motor. The journal housing has a thermometer pocket, a lubricator and a removable end cover. Friction due to end face contact is very much reduced by the use of a "floating" sleeve. Friction torque is measured by adding weights to a load hanger suspended from the damped torque arm. Weights added to the lower hanger apply a steady load to the journal bearing. A set of journal sleeves are supplied as standard. A tachometer is provided for measurement of the journal shaft speed, which can be controlled. An oil drip tray is provided to ensure all oil passing through the journal bearing is captured. A full set of weights, hangers and tools is provided.

 

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