Nakanishi NRR4040-QC User manual

取扱説明書 / OPERATION MANUAL
日本語 : P1 - P14 / English : P17 - P32
NRR4040 -QC
OM-K0640
クイックチェンジスピンドル / Quick Change Spindle

17
Thank you for purchasing the NRR4040-QC Quick Change Spindle. This spindle
features easy replacement of the collet holder in the spindle by lever operation. The
spindle is designed for grinding, small diameter drilling and milling, etc.. The <E4000
CONTROLLER>, <E4000 Series Brushless Motor>, and <Air Line Kit> are required
to drive this spindle. Read these Operation Manuals carefully before installing and
operating. Always keep this Operation Manual in a place where a user can referred to
for reference at any time.
CONTENTS
1. CAUTIONS FOR HANDLING AND OPERATION …………………………………P18
2. FEATURES ………………………………………………………………………………P20
3. SPECIFICATIONS AND DIMENSIONS………………………………………………P20
4. CONNECTION TO THE MOTOR ……………………………………………………P22
5. CHANGING THE TOOL AND REPLACING THE COLLET CHUCK …………P22
6. REPLACING THE COLLET HOLDER ……………………………………………… P25
7. INSTALLATION OF THE SPINDLE …………………………………………………P26
8. BREAK-IN PROCEDURE………………………………………………………………P29
9. CAUTIONS WHEN USING GRINDSTONES AND TOOLS ……………………… P30
10. TROUBLESHOOTING …………………………………………………………………P31

18
1. CAUTIONS FOR HANDLING AND OPERATION
Class Degree of Risk
WARNING
A safety hazard could result in bodily injury or damage
to the device if the safety instructions are not properly
followed.
WARNING
Read these warnings and cautions carefully and only use in the manner intended.
These warnings and cautions are intended to avoid potential hazards that could result
in personal injury to the operator or damage to the device. These are classified as
follows in accordance with the seriousness of the risk.
■
■
①This spindle is not a hand tool. It is designed to be used on CNC
machines or special purpose machines.
②Do not touch the cutting tool while it is running. It is very dangerous.
③Wear safety glasses, dust mask and use a protective cover around the
spindle whenever the spindle is rotating.
④Never connect, disconnect or touch the Power Cord Plug and Motor
Cord Connector with wet hands. This may cause an electric shock.
⑤Stop the motor prior to operating the lever. If lever operation is
performed during spindle rotation, contact with internal components
will damage the spindle.
⑥Never operate or handle the spindle until you have thoroughly read the
Operation Manuals and safe operation has been confirmed.
1) To prevent injuries / damages, check the spindle and cutting tool for
proper installation, before operating the spindle.
2) Before disconnecting the spindle, always turn the control power off
and turn the compressed air supply to the CONTROLLER off. Then it
is safe to remove the spindle.
⑦When installing a spindle to a fixed base, make sure the fixed base is
grounded in order to avoid the risk of an electric shock.
⑧When mounting the collet holder on the spindle, make sure the lever is
in LOCK position before rotating the spindle.
⑨When installing a tool in the collet holder, tighten the collet chuck
correctly then re-check the collet chuck and chuck nut before operating.
Do not over-tighten the collet chuck. This may cause damage to the
collet holder.

19
①Do not drop or hit this spindle, as shock can damage to the internal
components.
②When replacing the collet holder, make sure the inner face of the spindle
and taper surfaces of the collet holder are clean. (Clean them if debris is
found.) Ground particles or metal chips stuck to the surface will cause
run-out or damage to the collet chuck and spindle. Loss of concentricity
will cause spindle damage due to the lack of precision.
③When cleaning a spindle, stop the motor and remove debris with a soft
brush or a cloth. Do not blow air into the spindle with compressed air as
foreign particles or cutting debris may get into the ball bearing.
④When replacing the tool, make sure the tool shank, collet chuck, chuck
nut and inner face of the collet holder are clean. If ground particles or
metal chips stick to the inside of the collet chuck, damage to the collet
holder or spindle can occur due to the loss of precision.
⑤When sizing the correct collet chuck size to the tool shank diameter,
a tolerance of +0 ~
-
0.01mm is strongly recommended. A tool shank
within the +0 ~
-
0.1mm range is mountable, however, this may cause
poor concentricity and or insufficient tool shank gripping force.
⑥Select suitable products or tools for all applications. Do not exceed the
capabilities of the spindle or tools.
⑦Carefully direct coolant spray to the tool. Do not spray directly on the
collet holder and spindle body.
⑧Stop working immediately when abnormal rotation or unusual vibration
are observed. Afterwards, please check the content of section " 10.
TROUBLESHOOTING ".
⑨Always check if the tool, collet chuck are damaged before and after
operating.
⑩If the collet chuck, chuck nut or the collet holder show signs of wear
or damage, replace them before a malfunction or additional damage
occurs.
⑩Do not use bent, broken, chipped, out of round or sub-standard tools,
as this may cause them to shatter or explode. Tools with fractures or
a bent shank will cause injury to the operator. When using a new tool,
rotate it in a low speed and increase speed gradually for safety.
⑪Do not exceed the maximum recommended allowable tool speed. For
your safety, use speeds below the maximum allowable speed.
⑫Do not apply excessive force. This may cause tool slippage, tool
damage, injury to the operator or loss of concentricity and precision.
CAUTION
WARNING

20
CAUTION
Model NRR4040 - QC
Maximun Motor Rotation Speed 40,000min-1
Spinde Accuracy Within 1μm
Lever Rotation – Rotation Angle 90°
Applicable Motor
*This spindle can not use the reduction gear.
EM-4020, EM-4020A
EM-4040, EM- 4040A
Applicable Collet Holder QC5 - K (For Collet Chuck CHK Type)
QC5 - 16 (For Collet Chuck CH16 Type)
Weight 1,300g
3. SPECIFICATIONS AND DIMENSIONS
3 - 1 Specifications
Standard Accessories
・Wrench (36mm)・・1pc. ・Operation Manual・・1 set.
*The collet holder, collet chuck, and chuck nut are sold separately.
2. FEATURES
①This spindle features a lever type chucking system, which facilitates the replacement
of the collet holder by lever rotation.
②The spindle housing is made from precision ground, hardened, stainless steel (SUS)
with an outside mounting diameters of ȭ40 mm.
③There are 2 types of collet holders. Various sizes of mounting collet chucks are
available depending on the collet holder used. (CHK 0.5mm - 6.35mm or CH16
ȭ3.0mm, ȭ3.175mm, ȭ4.0mm, ȭ6.0mm, ȭ6.35mm, ȭ8.0mm and ȭ10.0mm).
⑪After installation, repair, initial operation, or long periods of non
operation, please refer to section " 8. BREAK-IN PROCEDURE " detailed
in Table 1. When checking the spindle, no vibration or unusual sound
should be observed during rotation.
⑫Do not disassemble, modify or attempt to repair this spindle. Additional
damage will occur to the internal components. Service must be
performed by NSK NAKANISHI or an authorized service center.
⑬When using this spindle for mass production, please purchase the
another spindle as a spare in case of an emergency.

21
Collet Holder QC5 - K QC5 - 16
Collet Chuck
CHK - □□ CH16 - □□
ȭ0.5mm - 6.0mmin 0.1mm
increments and ȭ2.35mm,
ȭ3.175mm and ȭ6.35mm
ȭ3.0mm, ȭ3.175mm, ȭ4.0mm,
ȭ6.0mm, ȭ6.35mm, ȭ8.0mm
and ȭ 10.0mm
Chuck Nut K - 265 CHN - 16
Wrench 12 ×14
(2 pcs. Required.）
17 ×15, 22 ×27
(1pc. Each. Required)
Preset Adapter QC5 - K ADP QC5 - 16 ADP
<Option>
3 - 2 Outside View
Fig 1
QC5-K
※Dust Proof Cover Area
（3.8）
（36.9）
ȭ23
ȭ25.8
QC5 -16
ȭ40
ȭ49.5
ȭ15.9
ȭ18.8
ȭ40 0
-0.01
（18.3）
25.639.7（67.7）
（3.8）
0.5
（25.2） 133
19.6
（81.2）
0.5
※
※

22
CAUTION
CAUTION
4. CONNECTION OF THE SPINDLE TO THE MOTOR
Align the threads on the front end of the motor and the rear end of the spindle, then
rotate the spindle clockwise. If the drive shaft of the motor does not engage the drive
dog on the spindle, it will not be possible for the spindle to rotate. DO NOT FORCE THIS
CONNECTION. Turn the spindle back a few threads, rotate the collet cap or spindle shaft
slightly by hand until the drive shaft and the drive dog are fully engages. This may take
several attempts. Use the 36mm wrench that have been provided for the final tightening of
the spindle to the motor.
Fig 2
・Make sure your hands and all interlocking parts of the spindle and motor
are clean before connecting the motor to the spindle. This is critical to
prevent contaminants from entering the motor or spindle.
・When connecting the spindle to the motor, it is best to hold the motor and
spindle in a vertical position. Carefully connect by threading the motor
on the spindle and avoid mis-alignment, as this will cause damage to the
motor and or spindle drive.
5. CHANGING THE TOOL AND REPLACING THE COLLET CHUCK
Turn
36
Tighten
36
Transmission Clutch
・Do not tighten the collet chuck without inserting a tool or dummy bur, as
this will damage the collet chuck, spindle or chuck nut, causing difficulty
removing the collet chuck.
・When installing the collet chuck in the chuck nut, make sure to fully
engage the latch inside the chuck nut to the groove on the collet chucks
outer circumference area. In addition, remember that if the collet chuck is
attached without being engaged with the latch of the chuck nut, the collet
chuck cannot be removed and this may cause damage to the collet chuck
or the spindle.

23
5- 1How to replace collets chuck using the provided wrenches
RECOMMENDATION
Please minimize the tool overhang amount to maintaining high accuracy.
Fig3Fig4Fig5
①Attach the chuck to the chuck nut. Be sure to fully engage the latch inside the chuck
nut to the groove on the collet chucks outer circumference area. (Fig. 3, Fig. 4) (Install
the collet chuck in the chuck nut by positioning the collet chuck in the chuck nut and
pressing down on flat surface. (Fig. 5))
②Attach the collet chuck and chuck nut to the collet holder and lightly finger tighten.
(Do not completely tighten until the end.) (Fig. 6)
③Insert the tool in to the collet chuck and position the wrench on the collet holder.
Position the wrench on the chuck nut, then tighten the chuck nut by turning clockwise.
(Fig .7)
④When removing the tool, set the wrench on the chuck nut and turn it counterclockwise
to loosen the collet chuck and remove the tool. (The first turn will loosen the chuck
nut, but the tool will not release and turning will become stiff. Keep turning through the
stiffness and the collet chuck will open.)
⑤When removing the collet chuck, the collet chuck and chuck nut are secured by a
groove in the collet chuck and a flange in the chuck nut. To remove the collet chuck
hold the chuck nut in one hand and push diagonally down on the collet chuck. The
collet chuck should be released. (Fig. 5).
groove
Latch Collet Chuck
Chuck Nut
Latch
Push
Chuck Nut
Wrench Seat
Collet Chuck
Fig 6 Fig 7
Tighten Loosen
Tool
Collet Holder
Chuck Nut
Wrench
Wrench
Tool
Loosen
Tighten
Chuck Nut
Collet Holder

24
5- 2Tool replacement using a preset adapter
Fig 8 Fig 9 Fig 10
①Affix the preset adapter to the tool holder (
ȭ20mm) etc.
②Align the collet holder to the drive dog notch of the preset adapter, and insert the collet
holder. (Fig. 8)
③Attach the collet chuck and chuck nut to the collet holder, and lightly finger tighten.
(Do not tighten until the end.) (Fig. 9)
④Insert the tool in to the collet chuck and set the wrench on the collet holder. Set the
wrench on the chuck nut, and tighten the chuck nut by turning clockwise. (Fig .10)
⑤When removing the tool, set the wrench on the chuck nut and turn it counterclockwise
to loosen the collet chuck and remove the tool. (The first turn will loosen the chuck
nut, but the tool will not release and turning will become stiff. Keep turning through the
stiffness and the collet chuck will open.)
Wrench Loosen
Tighten
QC3-□
Preset Adapter
Chuck Nut
Tighten Loosen

25
Fig 11
When replacing the collet holder, be sure to stop the spindle. If the lever is
operated while the spindle is rotating, the spindle will incur internal damage.
6. REPLACING THE COLLET HOLDER
Fig. 12 Before Clamping Fig. 13 After Clamping
①Stop the spindle rotation and confirm the rotation has stopped.
②Rotate the lever 90-Degrees to the OPEN position (matching " OPEN ●" mark and
the " ●" mark position). The collet holder will then be free for removal.
③Insert the new collet holder. Rotate the " ●" mark of the lever to the "●LOCK " mark
position all the way until it snaps in position to tighten the collet holder.
④When installing the collet holder into the spindle using an automatic tool changer (and
other machines), set the collet holder a distance of 1.2 - 1.8mm from the face of the
spindle.
OPEN
LOCK
OPEN
LOCK
Mounting
Dimensions
1.2 - 1.8 （3.8）
Mounting
Dimensions
0.5 （3.8）
CAUTION

26
CAUTION
WARNING
Fig. 14
Whenever connecting a spindle to an electric motor, or when installing a
spindle to a fixed base, ensure that the fixed base is grounded in order to
avoid risk of an electric shock.
7. INSTALLATION OF THE SPINDLE
・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 mounting within clamping area
etched on the spindle. If the spindle is installed incorrectly, this will cause
and damage to the spindle.
・Cautions when tightening the securing bolt of the Split Type Holder
Do not over-tighten the bolt. This may cause damage to spindle's
precision.
Tighten the bolt until the spindle body can not be turned by hand within
the fixture.
Extreme tightening is not necessary or recommended.
Apply working force and check that the spindle is tight before using.
①When mounting a spindle, refer to the Clamping Area etched on the spindle. (Fig. 14)
(Clamping Area)
27 40
CLAMPING AREA

27
CAUTION
Fig. 15 Fig. 16 Fig. 17
Do not allow set screws to come directly in contact with the spindle body
as shown in Fig. 17, 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. 18)
Fig. 18
② When installing a spindle to the holder, recommended installation method is shown
Fig 15. Refer to " ③How to fabricate the Split Type Holder ". If this is not possible,
install as shown in Fig. 16.
Fastening Bolt Fastening Bolt
Bushing with Slit
Split Type Holder
Fastening Bolt
Slit of Bushing
Slit
Spacer
Fastening Bolt
Bearing
Deformation
Damage of Internal
Components
Fastening Bolt

28
CAUTION
Fig. 19
Front View Side View
③How 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 the specified torque.
(6) Finish the Split Type Holder so that the inside diameter of the Split Type Holder is
ȭ40 with its tolerance 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 twist the Screw for Removal,
and widen the Slit Area.
・
How to confirm 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 final 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 specifications.
Please carefully check the spindle's specifications against the requirements of
your equipment and verify suitability and safety of the Holder prior to initial use.
Removal Screw
Spacer
Fastening Bolt
Spacer
Spacer
Slit
Fastening Bolt
Removal Screw

29
8. BREAK-IN PROCEDURE
Steps 1 2 3 4
Rotation Speed
(min-1)10,000 20,000 30,000 40,000
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.
Table 1.
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 1.

30
Fig. 20
The maximum surface speed or rpm is always specified for a grindstone. Do
not exceed the maximum speed with reference to the calculating chart below.
Always follow the grindstone manufacturer's recommendations.
Surface Speed (m / s) =
9. CAUTIONS WHEN USING GRINDSTONES AND TOOLS
Table 2. Overhang and Speed
Overhang (mm) Max. Speed (min-1)
20 N x 0.5
25 N x 0.3
50 N x 0.1
* N = Max. Operating Speed with 13mm overhang.
3.14 x Diameter (mm) x Rotation Speed (min-1)
1,000 x 60
①The proper surface speed for general grindstones is 10 - 30m / s.
②Do not exceed 13mm of overhang for mounted grindstones as shown in Fig. 20. If the
overhang must exceed 13mm, reduce the motor speed in accordance with table 2.
③Dress the grindstone prior to use.
④Do not use cutting tools with bent or broken shanks, cracks or excessive run-out.
⑤For 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.
⑥Always 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.
⑦When replacing the tool, make sure the tool shank, collet chuck, chuck nut, and inner
face of the collet holder are clean. If ground particles or metal chips stick to the inside
of the collet chuck, damage to the collet holder or spindle can occur due to the loss of
precision.
⑧Do not strike or disassemble the spindle.
⑨Please minimize the tool overhang amount to maintaining high accuracy. 13mm is the
maximum amount of overhang to maintain high accuracy and safety.
13
Grind Stone
CAUTION

31
Trouble Cause inspection / Corrective Action
Spindle does not
rotate or rotate
smoothly.
The spindles 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.)
Lever position is OPEN. Set the lever to the LOCK
position.
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.)
The lever is not set to the
LOCK position.
Replace parts.
(Return to NAKANISHI dealer
service.)
Abnormal vibration
or noise during
rotation.
The tool is bent. Replace the tool.
Cutting debris has
contaminated the ball
bearing.
Replace the ball bearings.
(Return to NAKANISHI dealer
service.)
The spindles bearings have
been damaged.
Collet holder
slippage.
The collet holder is worn. Replace the collet holder.
The internal components
of the spindle are worn or
damaged.
Replace the internal components
of the spindle.
(Return to NAKANISHI dealer
service.)
Tool slippage. Collet chuck or chuck nut are
not correctly installed.
Check and clean the collet chuck
and chuck nut. Reinstall the
collet chuck and chuck nut.
The collet chuck and the
chuck nut are worn.
Replace the collet chuck and
chuck nut.
High run-out. The tool is bent. Change the tool.
Chuck nut is not correctly
installed.
Secure the collet chuck and the
chuck nut correctly.
The collet chuck, chuck nut or
collet holder are worn.
Replace the collet chuck, chuck
nut or collet holder.
If a problem or concern occurs, please check the following prior to consulting your dealer.
10. TROUBLESHOOTING

32
Trouble Cause inspection / Corrective Action
High run-out. Inside of the spindle is worn. Replace the spindle shaft.
(Return to NAKANISHI dealer
service.)
Contaminants inside the collet
chuck, chuck nut and collet
holder or the spindle.
Clean the collet chuck, chuck
nut and collet holder or the
spindle.
The ball bearings are worn. Replace the ball bearings.
(Return to NAKANISHI dealer
service.)

12.10.20 002 九