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7.
CHANGING THE TOOL
CAUTION
・ Do not tighten the collet without inserting the test bur or the tool shank into the collet, as this will
damage the collet, spindle or collet nut, causing difficulty removing the collet.
・ If the " Tool Mounting Depth " of the tool is less than 28mm, oil leaks from collet may occur. Always
be sure to insert the tool into the collet so the tool extends into the collet at least 20mm（Collet
CHK-OH type） / at least 28mm（Collet CH16OH type） from the face of the collet.
RECOMMENDATION
Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of
overhang to maintain high accuracy and safety.
（1）Set the provided wrench (CHK-OH type : 12mm, CH16OH type : 17mm) on the spindle shaft.
（2）Place the provided wrench (CHK-OH type : 14mm, CH16OH type : 22mm) on the collet nut and turn it
counterclockwise to loosen the collet and remove the tool (The first turn will loosen the collet nut, but the tool
will not release and turning will become stiff. Keep turning through the stiffness and the collet will open).
（3）Clean the collet and collet nut before inserting the tool. " Tool Mounting Depth " of the tool is 20mm or more
（Collet CHK-OH type） / 28mm or more （Collet CH16OH type） into the collet from face of the collet.
（4）The new tool and tighten the collet by turning clockwise. Do not over-tighten.
28
Tool
Collet Nut
Spindle Shaft
Fig. 5
Loosen
Tighten
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