(1) hypothesis of resultant force as far as possible by KOYO bearing axis, which requires the screws evenly symmetry and smooth, by spherical or parallel to the axis force application SKF Bearings Inner Diameter http://www.skf-roller-bearings.com/mounted-units.html.
(2) the size of the wire should be smooth and uniform, unfavorable impact, this request can use hydraulic or use steady pull or pressure tool, it had to use hammer, also want to through soft without exfoliation metals such as copper sleeve to buffer, tapping force as gently as possible. It is best to use copper or copper hammer hammer.
(3) avoid by applying pressure roller, which requires inner ring (circle) shaft installation when applying pressure through the inner ring and outer ring installation) by outer force application.
(4) the degree of drag force continued to be, for example when installing KOYO bearing in KOYO bearing fit into the correct position to stop work, to ensure that the rings (washers) face rely on a hole or shaft shoulder end, neither packed too tight, nor does not reach the designated position.