Machined to exacting tolerances in cast iron and steel, the Fenner Taper Lock® four hole bush has been tried and tested in over 40 million applications. It is the most successful shaft fixing in the market place today with a full range of both metric and imperial sizes as well as a full range of weld-on hubs, bolt-on hubs and hub adaptors. Ease of installation and removal Equivalent to a shrink-on fit on uniform load applications and thus eliminating the cost of a key No costly reboring: full range of both metric and imperial available Standard range fits up to 125mm/ 5" shafts Special 4-hole feature for balanced assemblies Complete short reach range available, for compact lightweight assemblies High grade, close grain iron ( GG25) material Spherodial Graphite ( S.G.) iron construction on some sizes to give increase maximum bores WELD-ON HUBS Manufactured from steel to provide convenient means to secure fan rotors, steel pulleys, plate sprockets, impellers etc. to a shaft. Shouldered outer diameter allows for easy location Taper bored to receive 4 hole Taper Lock® bush sizes 1210 to 5040 BOLT-ON HUBS A convenient means to secure fan rotors, steel pulleys, plate sprockets, impellers etc to a shaft Welding not necessary Taper bored to receive 4 hole Taper Lock® bush sizes 1210 to 3040 HUB ADAPTORS For use with parallel bore eliminating the cost of drilling, tapping and taper boring Keyed version also available for heavy duty applications Taper bored to receive 4 hole Taper Lock® bush sizes 1008 to 4040