**6.2 Tamarind deseeder**

A tamarind deseeder developed at Tamil Nadu Agricultural University with the principle of impact and simultaneous shear (**Figure 9**) is used widely in Krishnagiri and Dharmapuri districts of Tamil Nadu to deseed small-sized tamarinds. The deseeding efficiency of the machine is 83% and the cost is Rs. 20,000/� [6].

A hammer-type tamarind deseeder was created and evaluated at Kumulur, Tamil Nadu Agricultural University comprises a feeding roller with rubber lining, hammering mechanism, motor, and power transmission framework and casing to

**Figure 6.** *Sun drying of the whole tamarind.*

**Figure 7.** *Tamarind dehuller developed at Tamil Nadu Agricultural University, Coimbatore.*

#### **Figure 8.**

*Tamarind dehuller developed at Tamil Nadu Agricultural University, Coimbatore.*

help the mechanism. The machine work on the standard of impact and deseeding proficiency of the machine is discovered to be 79% at 5 rpm (0.06 m/s); the peripheral speed of feeding roller to deseed the tamarind at the moisture content of 22.5% on a dry basis gives minimal mechanical harm to seed (0.3%) and pulp (14.94%). The equipment suits the large-sized fruits with multiple seeds. Feeding of small-sized fruits with single and two-seeded fruits in the feeding roller is troublesome due to the variation in shape.
