Ultimate Drilling Guide

2个版本，可自行选择一个为正常钻头放入版本另一个孔位较大可放入轴承套耐磨，增加打孔器使用寿命4mm对应轴承套外径为10mm5-6mm对应轴承套外径为12mm7mm对应轴承套外径为14mm打孔角度为30°，45°，90°后续会上其他孔位尺寸的版本图为轴承套示意2 versions, optionalA version is put in for normal bitsThe other hole position is larger and can be put into the bearing sleeve to wear and increase the service life of the punch4mm corresponds to the bearing sleeve outer diameter of 10mm5-6mm corresponds to the bearing sleeve outer diameter of 12mm7mm corresponds to the bearing sleeve outer diameter of 14mmThe punching angles are 30°, 45°, 90°Later versions of other hole sizes will be presentedThe picture shows the bearing sleeve