LLT is a dynamic range of modular linear profile rail guides designed by SKF, for use in a wide range of demanding industrial applications. LLT profile rail guides have been developed to combine high operating speeds with heavy load capacities; while offering excellent rigidity, repeatability and accuracy.
The modular design concept of the LLT profile rail guide range gives design and production engineers a wide range of system build options, in terms of rail length, carriage size and profile, and for factors such as levels of ac
curacy, stiffness and preloading. For example, systems can be supplied for loads between 8,400N and 128,500N, operating at speeds of up to 3.0m/sec» with a choice of six types of , carriage and unlimited stroke length.
In addition to SKF’s existing LLR range, the LLT system enables the four ball bearing, raceways that sit between each rail and carriage to be configured in an X-shaped arrangement, based on the contact angle of the rolling elements as against an O-shaped arrangement of the LLR range. Both systems provide excellent load bearing, acceleration, deceleration and side load characteristics, with the special X-shaped raceway configuration also offering superior self-aligning properties, combined with the ability to virtually eliminate variations between the rail and carriage, even under preload conditions; for example, lateral deviation between carriage and rail is within plus or minus 10 microns. This makes the new guides ideal for use in high performance single and multi-axis applications.
Perhaps as importantly, the arrangement of four raceways, each set with a 45° contact angle, ensures equal load capacity while reducing frictional losses to a minimum, with low break-away forces. This helps to produce smooth, easily controlled operation, even at extremely slow speeds, and plays a crucial role in providing extended operating life with minimal maintenance.
The SKF LLT series linear profile guide rails system offers:
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- Long service life, reduced maintenance and excellent reliability
- Improved running performance
- Pre-lubricated and fully sealed carriages
- Rail cutting for length customisation and end preparation
- Design to DIN 645-1 standard for critical dimension inter-changeability
- Competitive lead time
- Global availability and support
Each of the new LLT profile rail guides has a robust construction, from inductive and case hardened steel, and is supplied pre-lubricated, with specially developed double-lip seals at either end of each carriage, plus side and inner seals to ensure that lubricants are retained and to prevent in the ingress of contaminants. Operating temperatures range from -20°C to +80°C, although each unit can withstand temperatures of up to 100°C for short periods.
Suitable for applications in:
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- Medical
- Machine automation
- Machine tools
- Special purpose machines (SPM)
- Handling systems
- Pick and place robotics
Additionally, an extensive range of accessories for the SKF LLT profile rail guide are available, these include:
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- Additional front seal and scraper
- Lubrication reservoir
- Bellows
View the SKF Video of LLT profile rail guides
If you have a technical question or would like further information, please contact our Linear Division