■ industrial structure lacquering ■ surface with centering grooves ■ lockable by wing bolt or set screw ■ protected disc ■ CE sign ■ RSN/RSH with ball bearing ■ RSSN/RSSH with ball bearings ■ RSSN/RSSH made of cast-iron (heavy type) ■ RSN/RSH with smooth running ■ RSSN/RSSH enormously high-revving
