Modular LLT profile rail guides boost design flexibility

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Modular LLT profile rail guides boost design flexibilitySKF is launching an expanded range of modular linear profile rail guides, designed to combine high operating speeds with heavy load capacities. The guides offer excellent rigidity, repeatability and accuracy from a system that can easily be configured to meet the needs of both OEMs and end users alike.

The SKF LLT profile rail guide series incorporates a wide range of sizes, carriages and accessories, as well as various preload and accuracy classes. The modular concept of SKF LLT profile rail guides also gives design and production engineers a wide range of system build options, in terms of rail length, carriage size and profile. LLT profile rail guides are configured in an X-arrangement with a 45 degree contact angle between the rolling elements and raceways, and it is this design that promotes equal load sharing in all four main load directions to provide greater design flexibility.

There are two new carriage types in the extended range: the SA (sizes 15–35) and the LU (sizes 25–45), and a rail option with metal plugs (D6 type) to seal the rail counter bores. Also available are an adapter plate (LLTHZ PL) to allow for side lubrication, plus a lubrication connector (LLTHZ VN UA) to enable the connection of automatic lubrication systems. In addition, the SO shield offers engineers a useful alternative in applications that are very sensitive and require very low friction, or in medical/semi-conductor applications where there is no need for a seal due to the environment.

A bellows that is able to resist a temperature of 160degC for a short period (type LAS) for sizes 15–30 is available, while a short period of 260degC resistance can also be provided for sizes 35 and 45 (type WEL). SKF LLT rails can be specified with thin, dense chrome coating for corrosion resistance, while carriages with a nickel coating provide superior corrosion resistance.

For further information about the range of modular linear profile rail guides, please contact , or visit the website at

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