With its new UC 300 series of ball bearing units, SKF has increased protection against contamination in heavy-duty applications. These bearings feature superior sealing and stronger locking and are interchangeable with all JIS (Japanese Industrial Standards) housings. SKF said the new UC 300 is ideal for use in highly contaminated industrial environments. The housing has a solid base design to minimize areas that might otherwise trap dirt or moisture. UC 300 series units are available with bores ranging up to 100 mm.