The present invention is fixed in precision grade used for accurate indexing the index table of the machine tool also indexes of a method for the direct connection to the servo motor so far as the production method for dividing the index at an angle, or, in a set, and three as a method for dividing a circle by using a coupling having a certain backlash, which has the power to ping Clemson weak unsuitable for cutting high-strength or leche back to that structure due to the structure of two or more coupled dog does not have to be moved up and down the exact degree of division of the processed products falling back problems occur while using it did not perform precision machining. Therefore, in the present invention this two disc 1 and the tank, so that a backlash device, high-precision value (no lifting) of the index-coupled type 1 less than three minutes by the invention process who does not use normally coupled to the invention, which is completely the effect that it may have an economical supply of high-precision parts in the industry as having the advantage of high precision machining becomes possible by accurately as possible to the fixed partition.
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