Iso Tr 14179-2 Pdf ((new)) -

If you design, select, or maintain gear drives operating at more than 10 kW or in high ambient temperatures, the is not optional – it is a life-saving, budget-saving engineering tool.

From Table 3 in ISO TR 14179-2 (heat dissipation for a cast iron housing of 0.8 m² surface area): iso tr 14179-2 pdf

Without these factors, a gearbox rating might be off by 300%. If you design, select, or maintain gear drives