For many years researchers have been attempting to establish the relations among the preparation history, structure and properties of ceramics. In this study, the strength property of $Al_2O_3$ ceramics with components and giudes of the textile machinery was investigated. The optimized conditions of ressureless sintering were investigated in order to obtain the maximum strength of $Al_2O_3$ ceramics for using at the textile machinery. As the sintering conditions, $1,400{sim}1,700^{circ}C$ of temperatures and $30{sim}150$ minutes of times were applied. Three-point bending test was conducted on the sintered materials to obtain the strength property. From test results, the optimum sintering temperature has $1,600^{circ}C$. And the optimum sintering time in $1,600^{circ}C$ has about 100 minutes.