A new model of metal disc shaft couplings has been added to the range manufactured by the German specialist supplier Mönninghoff. Their Arcoflex range that starts at 800Nm now extends to 23000Nm with the new size 120. There are now 8 sizes in the range, all torsionally rigid and backlash free, suiting angular misalignments up to 1 degree. Compared to the alternatives of carden shaft universal joints and gear couplings, these metal disc designs give the advantages of being both maintenance and backlash free.
Metal disc couplings are available with one or two disc packs. Each disc pack is constructed with laminations of stainless spring steel, typically 12, bushed together at 6 points for the Arcoflex range. The coupling is assembled with the disc packs connected alternatively left and right with fitted bolts to the hubs and a central spacer. In operation the disc packs flex to take up angular misalignment and also any axial movement, typically a result of thermal expansion. Usually there is also an element of radial misalignment, also known as shaft offset. However if one shaft is self-
Metal disc couplings are torsionally rigid although they do exhibit a tiny amount of wind-
The new Arcoflex size 120 adds to the top of the Mönninghoff range which comprises of three series and now runs from 1 to 23000Nm. Availability and technical support is available in the UK from Techdrives, www.techdrives.co.uk
Double flexing metal disc coupling