Renold has launched an addition to its range of rubber-in-compression couplings, the RBI coupling, designed for industrial applications, such as on cement grinding mills, conveyors, pumps, and fans.
Rubber-in-compression couplings transmit torque through compressed rubber blocks, dampening vibrations and eliminating backlash and protecting both personnel and machinery.
“When rubber is loaded in compression it is inherently stronger than alternative options, such as rubber-in-shear, or tension, where the slightest scratch in the rubber can lead to catastrophic tears and complete coupling failure – resulting in downtime in both machinery and productivity,” Renold explained.
In addition, rubber-in-compression couplings save time and money when it comes to maintenance: “They are ‘fit and forget’ and do not require lubrication or adjustment of any kind,” said Renold. “The only serviceable items are the rubber blocks, which in the majority of cases are good for over ten years (although it is recommended to check them after five years), meaning that rubber-in-compression couplings also provide the lowest lifetime cost, when compared to other coupling alternatives.”
The RBI coupling represents the “next level” to Renold’s existing RB coupling, with a completely reconfigured profile of the compressed rubber blocks – a result of finite element analysis – allowing for an increase in torque transmissions compared to the existing RB coupling. According to testing of the new coupling, the torque rating has been increased by 50% when compared to the RB coupling.
Established in 1947, Renold Couplings is located in Cardiff, Wales, and manufactures a wide selection of couplings.
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