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22/05/2009
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By incorporating lubricant metering discs on its range of linear recirculating roller bearings and guideway assemblies, Schaeffler says it has reduced lubricant consumption by more than 25%, compared to conventional designs.
 Schaeffler's RUE-E range of roller monorail guidance systems can now be fitted with special lubricant metering valves to ensure that lubricant is precisely metered under all operating conditions, regardless of the guide's mounting position.
The secret is a patented injection moulding technology to produce the saddle plate, which – combined with the connection options for re-lubrication at the front, rear and side of the carriage end, and the design of the end pieces – mean lubricant is directed precisely at the rolling elements.
John Loonam, linear product specialist at Schaeffler UK, explains: "The O rings in a standard linear guidance system are replaced with the SMDS metering valves.
"A paper seal is placed between the end plate and the lubrication duct, which prevents leakage of the lubricant from the ends. Only one valve per side and rolling element loop is required and one lubrication connector per carriage."
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Author
Brian Tinham
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