According to Renold HiTec, rubber-in-compression couplings have considerably lower operating costs because they require no lubrication in service. The only components of these couplings that do require any form of maintenance are the rubber blocks themselves, but these last more than ten years before they need to be replaced.Gear couplings typically require maintenance every six months and will need replacing approximately every two-and-a-half years. On this basis, each rubber-in-compression coupling saves $2,750 over a five-year period, at current market values. Of course, that saving multiplies with the number of couplings in duty - and that's not taking any downtime due to coupling failure into account.You can find out more about Renold Hi-Tec's rubber-in-compression couplings by visiting the company's web site. Visit the DPA site, locate this story and use the hyperlink provided.