Rice milling is a process of applying mechanical loads to paddy grains to separate the husk from bran layers and germ, if needed. Milling performance is, therefore, directly related to mechanical and/or physical properties of individual paddy grains similar to rice mill types. Many researches have been done to investigate the effect of these parameters such as Takai and Barredo (1981) who studied the effects of friction laboratory mill on long- and bold-grain rice, IR 36 and who reported that prolonged continuous milling increased the degree of polishing slightly but caused a drastic increase in breakage. Andrews et al. (1992) evaluated the effects of moisture content, milling time, pressure applied to rice and sample size on head rice yield and degree of milling by the use of McGill No.2 miller. Archer and Siebenmorgen (1995) later studied the effects of cooling brown rice before milling on head rice yield and degree of milling in the McGill No.2 miller. Also Shitanda et al. (2001) evaluated the performance of an impeller husker and found that type of liner affected the husking performance with short-grain rice having a lower broken grain ration as compared to long-grain rice. Early studies by Bautista and Siebenmorgen (2002) and Bautista et al. (2005) showed that the rice mill type, moisture content of paddy and milling duration affected whole kernel yield (WKY). The rice mill type and milling duration were found to influence the shape and dimension of the milled rice kernels. Also, brown rice mass, milling duration, oscillation frequency of test tube and tube head space had statistical significant impact on the kernel mass loss percentage. Siebenmorgen et al. (2006) evaluated the selected rice laboratory sheller performance using different rice types, harvested moisture contents (MCs) and hulling MCs. Pan et al. (2007) also evaluated the effect of milling conditions including duration with milling weight and polishing weight on milling quality of medium grain rough rice using a McGill No. 3 mill. However, the results reported were most often based on a batch laboratory process, none of which on a continuous commercial type.