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Lubricant-free through the streets of Bangalor
Polymer bearing company Igus, can point to a real Bollywood film to illustrate just how robust its iglidur plastic plain bearings are. In Bangalore and many other Indian cities motorised taxi rickshaws are fitted with the company’s lubricant-free polymer bearings. These are used as main hub bearings on the anti-dive device as well as at other bearing points.
The three-wheeled vehicles have a special mechanism that keeps the vehicle stable during braking. This anti-dive device is a connection mechanism with four rods. The main hub at this connection is guided by an Iglidur RN56 self-lubricating bearing.
The load on the bearing is the load of the vehicle plus the weight of the passengers and the inertia forces, making around three tonnes in total, with a pivoting motion. Previously, a bronze bushing with lubrication grooves and punched holes with graphite filling at the edge were being used. The drivers reported that lubrication regularly failed, which meant the bearings wore out quickly and the clearance increased. Other problems prevalent were loud noises, heavy juddering of the handlebars or even tipping of the rickshaw during braking.
Igus developed a comprehensive new concept to solve this problem, both in terms of the wear parameters and a lubricant-free solution for use on dirty and uneven streets. Comfort for both the driver and the passengers has been significantly improved at the same time.
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