SKF next-generation linear ball bearings boast higher load ratings and longer lifetimes
2015 November 18, 09:00 GMT
SKF has improved the capability of its linear ball bearings, creating a new generation of products with higher load carrying capacity and extended lifetimes.
The LBC, D-series boasts several advantages and refinements compared with the earlier LBC series. These include: higher load ratings; extended lifetimes; reduced friction; capability for self-alignment; and is fully interchangeable with other ISO Series 3 linear ball bearings.
The new series is available for shaft diameters of 12 to 40mm, with a choice of double-lip seals. There are stainless steel versions for harsh applications, which can be combined with stainless steel guiding shafts.
“SKF linear ball bearings are already best in class throughout the industry – but the new generation takes this a step further,” says Phil Nicholas, Channel and Platform Development Manager Mechatronics, at SKF.
Like its predecessor, the new design allows linear speeds up to 5 m/s and accelerations up to 100 m/s2. Reliable operation is maintained at temperatures from -20 to +80 degrees Celsius, so the bearing is suitable for applications under many challenging conditions.
The new bearings can be used in a wide variety of applications, including automation machinery, pick and place machines, filling machines and screen doors for trains.
By redesigning the bearing cage to have fewer overall components, SKF has created optimised ball tracks and larger rolling elements. This has improved load carrying capacity by up to 15% (depending on bearing size), which helps product designers to downsize their designs or increase loading. At the same time, bearing lifetimes can be 50% longer than before.
The bearings are manufactured according to ISO 10285 dimensions and tolerances, so are interchangeable with previous LBC or ISO Series 3 bearings – making them a drop-in replacement for existing designs.
The LBCD self-aligning variant can accommodate tilting of the whole bearing through an angle of +/- 30 minutes of arc, compensating for misalignment caused by fitting or manufacturing tolerances, or by bending of an unsupported shaft.
LBC, D-series bearings are pre-lubricated with the optimum amount of SKF LGEP 2 grease. This makes them ‘shaft ready’ – which reduces assembly time and mounting mistakes.
The addition of two indicator marks on the front side – one for main load direction, the second for lubrication port position – helps to simplify mounting procedures.