Renold will exhibit its SMXtra interchangeable range of gearboxes and fluid couplings, for quarrying applications, at the Hillhead Exhibition from June 26–28 in Buxton, Derbyshire, U.K. The SMXtra enhanced range of shaft-mounted helical gear reducers is now available in 12 sizes, with four ratios. Hollow bore sizes up to 190 mm enable the units to be fitted in various quarrying applications.The units are available with a standard parallel sleeve arrangement and with a single bush taper locking system, which can be fitted from either side of the unit, allowing the units to be fitted and removed in the quickest possible time. Also displayed for the first time is the new range of Hydrastart soft-start fluid couplings, which have been redesigned to be interchangeable with competitors' products. In addition, Renold is presenting new mid-range metric worm gear units. These are available in the four popular metric sizes (100–200mm) with ratios from 5:1 to 70:1. These units have been designed as 'drop-in' replacements of the Radicon mid-range units from David Brown.