Simply put, gear runout describes whether every gear tooth maintains consistent positioning relative to the rotation center when the full‑circle gear rotates.
Excessive gear runout will lead to the following problems during one full rotation of the gear:
– Tight meshing at certain positions
– Loose meshing at other positions
– Unwanted noise, vibration and uneven gear‑tooth wear
Therefore, controlling gear runout is one of the critical quality indicators to ensure smooth gear meshing, reliable power transmission and extended service life for slewing bearings.
