19
20
(2) The installation shown in Fig. 28 is the recommended fixturing method. If this is not
possible, install as shown in Fig. 29. Do not use set screws directly in contact with the
motor or spindle body as shown in Fig. 30, this will result in damage to the housing and
internal components. When mounting the spindle take care not to fixture over the bearings
as this will result in bearing damage.
Fastening Bolt
Slit
Bushing with Slit
Fastening Bolt
Slit of Bushing
Fastening Bolt
Fig. 28
Fig. 29
Fig. 30
CAUTION
•
Caution about tightening the bolt
Do not over tighten the bolt. This may cause damage to the spindle’s precision.
Tighten the bolt until the spindle body can not be turned by hand within the Fixture.
Apply working force and check that the spindle is tight before use.
•
Caution about split type Holder
Insert a shim into the holder bore, and tighten the bolt with the specified torque.
Manufacture the holder with roundness and cylindrical tolerance of less than 5µm.
Insert a thin shim into the split in the holder and reduce the shim size in 5µm
increments until the spindle is held firmly.
Tighten the clamping bolt to the torque specified for that size and type of bolt.
The final responsibility for ensuring a product’s suitability for use in a given
application is left to the designer of the equipment in which NAKANISHI’s spindle is
installed. NAKANISHI offers spindles with a wide variety of capabilities and
specifications. Please carefully check the product’s specifications against the
requirements of your application and verify suitability and safety prior to initial use.
WARNING
When installing a motor/spindle to a fixed base, make sure the fixed base is
grounded in order to avoid the risk of an electric shock.
REPLACING THE COLLET
The spanner size and the chuck replacement varies depends on the spindle types. Be sure to
check the operation manual on the spindle or the motor spindle about the details.
(1) Remove the cutting tool according to the “
CHANGING CUTTING TOOLS
” procedure
above and remove chuck nut assembly. (Fig. 25)
(2) The collet and chuck nut are held together by a groove in the collet and a flange in the
chuck nut. To remove the collet hold the chuck nut in one hand and push diagonally down
on the collet. The collet should pop out. (Fig. 25)
(3) Install the new collet in the chuck nut by positioning the collet in the chuck nut and
pressing down on a flat surface. (Fig. 26)
Loosen
Spindle
Chuck Nut
Fig. 25
Fig. 26
Spanner Seat
Collet Chuck
Push
Chuck Nut
FIXTURING THE MOTOR/SPINDLE
(1) When mounting the motor/spindle, refer to the recommended clamping area. (Fig. 27)
If the motor/spindle is mounted incorrectly, this will cause and damage to the spindle.
(The recommended clamping area varies depends on the spindle types. Please check the
operation manual on the spindle or the motor spindle about the details.)
Fig. 27
13
14
a
b
Recommended
Clamping Area
( )
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