Material: Hubs made from aluminium, spider (elastic insert) made from polyurethane, Shore hardness 92°A, yellow. Spare part spiders available in Shore hardness 92°A, 98°A and 64°D. Couplings are available undrilled or pre-drilled ex stock. Customized bores and feather-key grooves available at extra charge. Temperature range: -40°C to +90°C. * B is the avarage dimension by which, e.g., a driven or driving machine has to be moved in order to demount one of the coupled units in vertical direction. 1) Weights refer to max. customized bore without keyways.