Parts of disc harrow

1. Disc: It is a circular concave revolving steel plate used for cutting a inverting the soil.
2. Gang: Each set of discs that are mounted on a common shaft is called the gang.
3. Gang bolt or arbor bolt: It is a long heavy of square headed bolt from the other end, a set of discs are mounted on the gang bolt.
4. Gang control lever: A lever, which operates the gang mechanisms of the disc harrow, is called the gang control lever.
5. Spool or spacer: The flanked tube, mounted on the gang bolt between every two discs to prevent the lateral movement of the disc on the shaft is called the “spool’ or `spacer’.
6. Bearing: Bearing is essential to counter act the end thrust of the gang due to soil thrust.
7. Transport wheel: In trailing type disc harrow, the transport wheels are provided for transport work on roads and for preventing the edges of the discs from damage.
8. Scraper: It prevents disc from clogging. It removes the soil that may stick to the concave side of the disc.
9. Weight box: A box like frame is provided on the main frame of the harrow for putting additional weight on the implement helping in increasing the penetration of the disc in soil.