अक्षेषु नान्दीपिनद्धं कारयेत् ॥ कZ_०२.१९.१६ ॥
akṣeṣu nāndīpinaddhaṃ kārayet
An den Achsen/Drehpunkten soll er eine «nāndī»-Bindung/Befestigung (nāndī) anbringen lassen (d. h. eine vorgeschriebene Sicherungs-/Verriegelungsanordnung an den Drehpunkten).
Because small mechanical looseness or hidden alterations at the pivot can systematically bias measurements; specifying a fastening standard reduces manipulation and wear-based drift.