ISO/TR 4122:1977

Equipment for working the soil — Dimensions of flat disks — Type A

Specifies interchangeability dimensions for agricultural disks of the same type and nominal size, classified as types A, B, and C. Applies to disks as working parts of ploughs, harrows, and disk-tillers. The nominal dimensions recommended for disks in the table those given A flat disks. The figure illustrates profile and section.