Changing The Tool - Nakanishi EMA - 3020K Operation Manual

7.

CHANGING THE TOOL

CAUTION
Do not tighten the collet without inserting a tool or dummy bur, as this will damage the collet, spindle
or collet nut, causing dif¿culty removing 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 12mm wrench on the spindle.
② Place the provided 14mm wrench on the collet nut
and turn it counterclockwise to loosen the collet
and remove the tool (The ¿rst 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, then insert the new
tool and tighten the collet by turning clockwise. Do
not overtighten.
8. REPLACING THE COLLET
CAUTION
When installing the collet into the collet nut, be sure to fully engage the latch inside the collet nut
to the groove on the collets outer diameter area. In addition, remember that if the collet is attached
without being engaged with the latch of the collet nut, the collet cannot be removed and this may
cause damage to the collet or the spindle.
① Remove the tool according to the section
" 7. CHANGING THE TOOL " procedure above
and remove collet nut assembly (Fig. 4).
② The collet and collet nut are secured by a groove
in the collet and a Àange in the collet nut. To
remove the collet hold the collet nut in one hand
and push diagonally down on the collet. The collet
should be released (Fig. 5).
③ To install the collet, hold the collet at a slight angle,
and insert it into the collet nut (Fig. 6).
Press the collet in the collet nut by positioning the
collet in the collet nut and pressing down on Àat
surface (Fig. 5).
Be sure to fully engage the latch inside the
collet nut into the groove on the collet's outer
circumference area (Fig. 7).
6
Tool
Collet Nut
Fig. 3
Tool
Collet Nut
Loosen
Spindle Shaft
Fig. 4
Groove
Latch
Collet
Collet Nut
Fig. 6
Loosen
Spindle Shaft
Tighten
Wrench Seat
Collet
DOWN
Collet Nut
Fig. 5
Latch
Fig. 7