Castors used in "APG" armchairs are designed for a
guaranteed static rectilinear vertical load of 50 kg. Meanwhile the weight of
the sitting man is equally spread among five castors fixed to the base. Special
castors with rubber cover which do not damage floor surface are proposed for
smooth floors. Castors with axis diameter of 10 mm aand 11 mm are used in swivel
chairs.
Available stems for castors