15
. DISPOSAL OF THE SPINDLE
When disposal of a Spindle is necessary, follow the instructions from your local government agency for proper
disposal of industrial components.
Contents are subject to change without notice.
10
. REPLACING THE COLLET
①
Stop the coolant air of motor.
②
Supply air pressure : from 0.55 - 0.6MPa (79.8 - 87psi)
to Air Inlet Joint to keep the collet opened.
Do not take off the tool when the air pressure is supplied.
③
Place the provided wrench 9mm on the wrench hook of
the spindle shaft, and tighten the Spindle.
④
Place the provided wrench 6.1mm on the collet and
turn it counterclockwise to loosen the collet. And take
off the collet with the tool from the spindle shaft.
⑤
Remove the tool from another collet.
⑥
Insert the tool into another collet and turn it clockwise
to be attached on the spindle shaft.
⑦
Tight it lightly with the provided wrench 9mm and
wrench 6.1mm (Specied tightening torque : 1.0 N
・
m).
⑧
Exhaust the air through 3-way valve.
⑨
After the chuck is replaced, supply the coolant air of
motor to the motor.
CAUTION
Collet will be worn and torn if it will be opened and colsed about 5,000 - 10,000 times. Replace it
with the new collet at this time.
Tool
Collet
Loosen
Tighten
Spindle Shaft
11
9
6.1
8
Fig. 4
11
. INSTALLATION OF THE SPINDLE
WARNING
When installing a Spindle to a xed base, make sure the xed base is grounded in order to avoid
the risk of an electric shock.
CAUTION
・
When installing a Spindle, do not hit, drop or cause shock to the Spindle. This may cause
damage to internal components and result in malfunctions.
・
When mounting the Spindle, be sure to secure within Clamping Area etched on the Spindle O.D.
If the Spindle is installed incorrectly, damage to the internal components is possible.
・
Cautions when tightening the securing bolts on to a Split Type Holder
Do not over-tighten the bolt. This will cause damage to Spindle's precision.
Tighten the bolt until the Spindle body can not be rotated by hand within the xture.
Extreme tightening is not necessary or recommended.
Apply working force and check that the Spindle is tight before using.
①
When mounting a Spindle, refer to the Clamping
Area etched on the Spindle (Fig. 5).
(Clamping Area)
15
55
CLAMPING AREA
②
When installing a Spindle to the holder, recommended installation method is shown Fig. 6. Refer to "
③
How to
fabricate the Split Type Holder ". If this is not possible, install as shown in Fig. 7.
Fig. 5
Fastening Bolt
Fastening Bolt
Fastening Bolt
Slit of Bushing
Slit
Spacer
Bushing with Slit
Split Type Holder
Fig. 6
Fig. 8
Fig. 7
CAUTION
Do not allow set screws to come directly in contact
with the Spindle body as shown in Fig. 8, as this
will result in damage to the Spindle housing and
internal components.
When installing, never clamp directly over the
bearings, as this will result in bearing damage.
(Refer to Fig. 9)
Bearing
Fastening Bolt
Deformation
Damage of internal
Components
Fig. 9
③
How to fabricate the Split Type Holder
(
1) Rough bore the inside diameter of the Split Type Holder.
(
2) Cut a slit. (Ex. Slit 2mm) wide.
(
3) Tighten the Screw for Removal and Force Open the Slit Area.
(
4) Insert a spacer (Ex. thickness = 2mm) into the Slit Area.
(
5) Loosen the Screw for Removal, and tighten the fastening bolt with its specied torque.
(
6) Finish the Split Type Holder so that the inside diameter of the Split Type Holder is
ȭ
40 with its tolerans
range from -
0.01mm to - 0.015mm, and its roundness and cylindricity of less than 5μm.
(
7) When inserting the Spindle loosen the Fastening Bolt, and tighten the Screw for Removal, widening
the Slit Area.
Fastening Bolt
Fastening Bolt
Slit
Front View
Side View
Screw for Removal
Screw for Removal
Spacer
Fastening Bolt
Fig. 10
CAUTION
・
How to conrm the correct tightening or clamping of the Spindles in the holder:
Measure the current value of the CONTROLLER's power cord by the clamp meter.
Fasten the holder so that the increase in the no-load current value (during rotation at the
maximum rotation speed) with the Spindle fastened is 10mA (for type 200V / 230V) or less,
compared to the no-load current value (during rotation at the maximum rotation speed)
without fastening the Spindle. Do not over-tighten the Fastening Bolt. It may damage Spindle's
precision and shorten the life of the bearings.
・
The nal responsibility for ensuring holder's safety 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 specications.
Please carefully check the Spindle's specications against the requirements of your
equipment and verify suitability and safety of the Holder prior to initial use.
12
. BREAK - IN PROCEDURE
During transportation, storage or installation, the grease inside the bearings will settle. If the Spindle is suddenly run
at high-speed, the grease will be ejected from the bearings, causing excessive heat that will cause bearing damage.
After installation, repair, initial operation, or long periods of non operation, please follow the break-in procedure
detailed in Table. 2.
Table. 2
Steps
1
2
3
4
Rotation Speed (min
-1
) (rpm)
15,000
30,000
40,000
50,000
Rotation Time
（
min
）
15
10
10
15
Items to Check
No Abnormal
Noises
The spindle housing temperature during
the break-in process should not exceed 20
degrees C (36 degrees F) above ambient
temperature. Should the spindle exceed this
limit, rest the spindle for at least 20 minutes
and re-start the break in procedure from
the beginning. If the housing temperature
rises again and exceeds 20 degrees C (36
degrees F) above ambient temperature,
check the spindle and motor for proper
installation.
The spindle housing
temperature during
the break-in process
should not exceed
20 degrees C
(36 degrees F)
above ambient
temperature.
13
. CAUTIONS WHEN USING GRINDSTONES AND TOOLS
3.14 x Diameter (mm) x rotation speed (min
-1
) (rpm)
1,000 x 60
Surface Speed (m / s) =
CAUTION
The maximum surface speed or rpm is always specied for a grindstone. Do not exceed the maximum
speed with reference to the calculating chart below. Always follow the grindstone manufacturer's
recommendations.
①
The proper surface speed for general grindstones is 10 - 30 m / s .
②
Do not exceed 13mm of overhang for mounted grindstones as shown in Fig. 11. If the overhang must
exceed 13mm, reduce the motor speed in accordance with Table. 3.
③
Dress the grindstone prior to use.
④
Do not use cutting tools with bent or broken shanks, cracks or excessive run-out.
⑤
For grinding, the maximum depth of cut should not exceed 0.01mm radially or axially. Reciprocate the tool
several times after each pass to eliminate tool pressure.
⑥
Always operate cutting tools within the allowable recommended speed of the cutting tools. Use of a cutting
tool outside of the allowable speed of the cutting tools could cause damage to the Spindle and injury to the
operator.
⑦
Keep the cutting tool shank and collet clean. If contaminants are left in the collet, excessive run-out will cause
damage to the cutting tool and or Spindle.
⑧
Do not strike or disassemble the Spindle.
⑨
Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of overhang to
maintain high accuracy and safety.
Table. 3 Overhang and Speed
Overhang (mm)
Max. Speed (min
-1
) (rpm)
20
N x 0.5
25
N x 0.3
50
N x 0.1
*N = Max. Operating Speed with 13mm overhang.
13
Fig. 11
14
. TROUBLESHOOTING
If a problem or concern occurs, please check the following prior to consulting your dealer.
Trouble
Cause
Inspection/Corrective Action
Spindle does not rotate
or rotate smoothly.
The Spindle ball bearings have been
damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The motor has been damaged.
Replace the motor.
(Return to NAKANISHI dealer service.)
Overheating during
rotation.
Cutting debris has contaminated the
ball bearings, and the ball bearings
are damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Abnormal vibration or
noise during rotation.
The tool shank is bent.
Replace the tool.
Cutting debris has contaminated the
ball bearing.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The Spindle ball bearings have been
damaged.
Tool slippage.
Collet is not correctly installed.
Check and clean the collet. Reinstall the collet.
The collet is worn.
Replace the collet.
High run-out.
The tool is bent.
Change the tool.
Collet is not correctly installed.
Secure the collet correctly.
The collet is worn.
Replace the collet.
Inside of the Spindle is worn.
Replace the spindle shaft.
(Return to NAKANISHI dealer service.)
Contaminants inside the collet or the
Spindle.
Clean the collet and the inside of the taper and
Spindle.
The Spindle ball bearings have been
damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Check can not be
opened and closed.
Poor the air hose.
Check all threaded joints and re-tighten if
necessary.
The air hose have been damaged.
Replace the air hose.
Low air pressure.
Check and adjusting the air circuit.
Error connection of the air circuit.
2015.07.20 003
Refer to the brushless motor and the E3000 CONTROLLER Operation Manuals.
