JIS B6159:1985 pdfダウンロード。Universal Dividing Heads and Simple Dividing Heads 1.Scope This Japanese Industria1 Standards specifies universal dividing heads andsimple dividing heads used mainly for machining work,hereinafter referred toas the dividing heads. 2.Definition The meanings of the main terms used in this standard shall be as follows :(1) universal dividing head A device mainly mounted on a milling machineand used for dividing machining dimensions.This device can be usedfor both direct dividing and indirect dividing work. Further , its main spindle can be tilted. In addition , spiral cutting is possible when this device is attached witha mechanical feeding device.The dividing head...