Ama-Bolt-on Hubs aklanyelwe ukusetshenziswa kwezihlahla ze-taper, okuhlanganisa i-BF nohlobo lwe-SM. Bahlinzeka ngesixazululo esikahle sokuvikela ama-fan rotor, ama-impeller, ama-agitator namanye amadivaysi okufanele aboshelwe ngokuqinile emigodini.