Coolant 1) Internal coolant is recommended. 2) In case of external coolant. 3) Dry machining is not recommended. In case of horizontal M/C Lathe: 3D or less Vertical M/C: 1.5D or less K Internal coolant is recommended for horizontal machining center because external coolant may not sufficiently be applied to inside because the tool is revolving. Precautions for use Core Deviation Drilling 1) If drill is stationary 2) If drill is rotating max. 0.02mm max. 0.02mm This is be used with a boring sleeve (screw clamp) and collet chuck, please Make sure to use arbor that is not deformed. be sure to set deviation amount under 0.02mm between workpiece and drill. Center of arbor deviation must be within 0.02mm. Cautions for installation on Machining Center For installation of MagicDrill DRC, 1st choice…use Hydro Chuck, Power Chuck, Collet Chuck, etc. 2nd choice…Side lock arbor Hydro Chuck Power Chuck Install MagicDrill DRC to above chuck Collet Chuck Example of side lock arbor 1st choice 2nd choice K31