Modelcraft free running sleeves modelcraft hlf 1022 the modelcraft free running sleeve 14mm od 10mm bore 22mm width has a low radial height and double bearing either with integrated sintered bushings or needle cages meaning no additional bearings are required it should be fitted using a driver the collar of which comes into contact with the end marked with the abbreviations modelcraft hlf 1022 free running sleeve 14mm od 10mm bore 22m width