With the growing local demand for economical yet efficient linear- way products, engineering solutions provider BMG has established a partnership with OME Technology to supply STAF integrated linear-motion systems to the South African market.
These systems include various linear-motion components, such as linear guides, ball screws and linear table.
“The STAF range is known globally for high speed and precision, easy integration and interchangeability, as well as energy saving and environmental protection,” says BMG bearings division GM Rouff Essop,
He adds that STAF linear-motion products are used in diverse applications, including welding, soldering and drilling; industrial machinery; measuring and inspection; printing, scanning and packaging; assembly plants and warehousing, as well as in robotic arms and manipulators.
Essop explains that the linear guides are used in conjunction with compact ball screws, which are locked onto a platform and linked to a servo motor to produce linear motion. The main function of the guide is to allow for the platform to maintain high precision, high rigidity and high load motion.
He points out that STAF linear guides have a common rail, interchangeable alloy steel slide and are designed for reliability and flexibility. The dust sealing twin-lip structure ensures effective sealing, while the large internal lubricant storage facility reduces maintenance requirements and extends the service life of the system.
Cage and noncage-types, which are fitted on the same profile rail, have new patented features, which include a ball recirculation design, with no gap, for smooth running. The newly designed chain lubrication system reduces friction during operation and extends service life of the system.
Essop notes that STAF’s BGC range of cage-type linear guides, which are suitable for high-speed applications, contain lubricant between the steel balls. The friction produced during operation is reduced by the oil film. Advantages over conventional systems include reduced contact pressure, lower noise levels, less vibration and lower heat generation.
In traditional guides, the steel balls collide, producing a sharp, screeching noise and are easily worn out. BGC linear guide cages are manufactured from macro- molecule polymer, with lubricant space designed within the chain belt. With the flexibility of the chain belt and the cushioning effect of the lubricating oil, most of the noise produced from the chasing effect of the steel balls is eliminated.
STAF’s advanced lubrication system ensures that lubricating oil reaches all surfaces in the loop during operation and in static state, while oil loss is minimal.
The BGC steel ball retainer has a fixed distance retaining function, so that each steel ball receives a balanced force for stable operation and extended service life. The issue of irregular gaps is far smaller than with traditional linear guides.
The BGX noncage series, with a four-groove design, ensures even load capacity in all directions, irrespective of how the rails are mounted. An auto-adjust capability prevents assembly errors and allows for quick, accurate linear motion by eliminating the deviation of the mounting planes. Advantages of this four-groove series over the conventional two-groove design include quick, light movements, reduced friction, high load ratings and improved stability