Iso Tr 14179-2 Pdf -
Most gearbox designers obsess over tooth bending stress (ISO 6336) or pitting resistance. But the silent killer of gearboxes isn't stress—it's heat. Every year, millions of dollars are lost to lubricant coking, tooth scuffing, and oil seal failure caused by underestimated thermal loads.
Enter ISO TR 14179-2:2007 – the "Technical Report" that is anything but boring. While Part 1 of the standard gives you the thermal balance equations, Part 2 is the secret weapon: a massive library of thermal dissipation data for real-world gearboxes.
A: Technical Reports are reviewed every 3-5 years. As of 2025, the 2001 edition is still current, but always check ISO’s website for confirmations.
Example calculations demonstrating the method from Part 1 under real operating conditions.
Correction factors for non-standard conditions (e.g., high ambient temperatures, poor ventilation, altitude effects).
Guidance on measurement of gear unit temperatures for validation.
Practical limits for different lubricants and gearbox configurations.
ISO TR 14179-2 is a Technical Report titled: "Gears – Thermal capacity – Part 2: Thermal load-carrying capacity."
It is the companion document to ISO TR 14179-1, which deals with thermal capacity based on oil temperature. While Part 1 provides the basic calculation model, Part 2 specifies the thermal load-carrying capacity of gear units operating under specific conditions.
Pro tip: If you are just learning, consider purchasing the ISO TR 14179-2 pdf as a bundle with ISO 6336 (gear strength calculations) – it is often discounted.
ISO TR 14179-2 is a Technical Report (TR) published by the International Organization for Standardization (ISO). Its full title is: "Gears – Thermal capacity – Part 2: Thermal load-carrying capacity."
It is the companion document to ISO TR 14179-1, which covers the calculation of scuffing and scoring risk. Part 2 specifically focuses on the steady-state thermal equilibrium of a gear drive.
Do not rely on guesswork. Obtain the official ISO TR 14179-2 pdf, learn the thermal balance equations, and design gear drives that last.
Have more questions about gear thermal capacity? Bookmark this guide and check back for updates when ISO releases the next revision of TR 14179-2.