232 FARM MACHINERY 



328. Power. The power required for a four-hole 

 spring sheller is usually about eight horse. The six-hole 

 machine requires about 10 and the eight-hole 12 to 14 

 horse power. The power required for cylinder shellers 

 varies with the style and manufacturer's number. 



329. Capacity. The capacity of the spring sheller is 

 determined by its size, which is denoted by the number 

 of holes, which vary from the one-hole hand-power ma- 

 chine to the large eight-hole power sheller. A four-hole 

 sheller is usually rated at 100 to 200 bushels an hour, the 

 six-hole at 200 to 300, and the eight-hole at 300 to 600 

 bushels an hour. The size of the cylinder sheller is de- 

 noted by the manufacturer's number only. Cylinder 

 shellers have a large capacity ranging up to 800 bushels 

 an hour for the largest sizes. 



330. Selection of a sheller. The following are the 

 requisites for a good portable corn sheller. First and 

 probably the most important feature to look to is the 

 frame. This should be made very strong. It should be 

 mortised and tenoned and secured together by means of 

 rods or bolts. The wood should be either of ash or oak. 

 The bearings for all parts where there is considerable 

 power placed upon them should be long, well secured 

 to the frame, and, where possible, made dust proof. They 

 should also be supplied with plugs or oil cups to keep 

 all grit and dust from entering. The feeding shaft should 

 be strong, and the lugs should be of chilled cast iron or 

 cast steel. The feeder box should be supplied with agi- 

 tators to prevent the corn piling up at the lower end and 

 thus allowing the sheller to run partially empty. For 

 large job work the machine should be provided with a 

 drag carrier of length from about 10 to 20 feet. Where 

 the cribs are extra long it is well to have two sections of 

 about this length. The rag irons should be separate 



