Specification for large (vee-throated) haulage rope pulleys for mines and quarries.
NORMA vydána dne 5.10.1973
Označení normy: BS 4878:1973
Datum vydání normy: 5.10.1973
Počet stran: 36
Přibližná hmotnost: 108 g (0.24 liber)
Země: Britská technická norma
Kategorie: Technické normy BS
Requirements for pulleys 600 mm to 2100 mm diameter incorporating rolling bearings in boss; also 600 mm and 1350 mm diameter with bearing bushes in associated pedestals. Specifies pulley classification, particular design criteria, shafts, pedestals, bearings, workmanship, inspection and marking. Includes explanatory appendix, graphs and several illustrations. Status: Confirmed