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1

. CAUTIONS FOR HANDLING AND OPERATION

Automatic Tool Replacement Spindle

OPERATION MANUAL

OM-K0457E 003

Thank you for purchasing the Automatic Tool Replacement Spindle " NR40 - 5100 ATC ". The E3000 CONTROLLER, 
Brushless Motor and Air Line Kit are required to drive this Spindle. Read this and all the associated component 
Operation Manuals carefully before use. Always keep this Operation Manual in a place where a user can referred 
to for reference at any time.

 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 classied as follows in accordance with the seriousness of the risk.

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.

 CAUTION

A hazard that could result in light or moderate bodily injury or damage 
to the device if the safety instructions are not followed.

2

. BASIC PACKAGE

When opening the package, check if it includes all items listed in " Table.1 Packing List Contents ".
In the event of any shortage, please contact either NAKANISHI (see the " 4. CONTACT US " section) or your local 
dealer. 

Table. 

1 Packing List Contents

Spindle

・・

1pc.

Collet 

ȭ

3.175mm

(CHB - 3.175)

・・

1pc.*

(For U.S. market 

ȭ

3.175mm 

(CHB - 3.175))

Bar Wrench (K - 236)

・・

1pc.

Wrench (6.1 x 8), (9 x 11)

・・

1pc. Each.

Air Hose with Filter

(

ȭ

6mm x 2m)

・・

1pc.

Inspection Card

・・

1pc.

Operation Manual

・・

1set

᳨ᰝᡂ⦼⾲

Inspection Card

ྲྀᢅㄝ᫂᭩

OPERATION MANUAL

* The collet is attached to the Spindle.

3

. WARRANTY

We provide a limited warranty for our products. We will repair or replace the products if the cause of failure is due 
to the following manufactures defects. Please contact us or your local distributor for details.

Defect in manufacturing.

Any shortage of components in the package.

Where damaged components are found when initially opening the package.
(This shall not apply if the damage was caused by the negligence of a customer.)

4

. CONTACT US

For your safety and convenience when purchasing our products, we welcome your questions.
If you have any questions about operation, maintenance and repair of the product, please contact us.

Company Name

Business Hours

U.S. Toll Free No.
Telephone No.
Fax No.
Web Address

:

Industrial Div. 

:  8:30am to 17:00pm (CST)
   (closed Saturday, Sunday and Public Holidays)
:  800-585-4675
:  847-843-7664
:  847-843-7622
:  www.nskamericacorp.com

Contact Us

Contact Us

For U.S. Market

Company Name
Business Hours

Telephone No.
e-mail Address

:  
:  8:00am to 17:00pm
   (closed Saturday, Sunday and Public Holidays)
:  +81 (0) 289-64-3520
:  [email protected]

For Other Markets

5

. FEATURES

The tools can be replaced automatically by putting ON - OFF the air.

The Spindle housing is made from precision ground, stainless steel (SUS) with outside diameter of 

ȭ

40mm.

The collet size is

ȭ

2.0mm,

ȭ

3.0mm,

ȭ

3.175mm,

ȭ

4.0mm.

6 - 1  Specications

Model

NR40 - 5100 ATC

Maximum Motor Rotation Speed

50,000min

-1

 (rpm)

Spindle Accuracy

Within 2m

Applicable Motor
*This Spindle can not use the reduction gear.

EM - 3060, EM - 3060J / EM - 3060J - 2M
EM - 3030J / EM - 3030J - 2M

Milling Capacity
(Cutting or Milling PC boards with an end mill.)

End Mill Size
Wo r k
Thickess
F

: Less than

ȭ

2.0mm

: PC board (ex. Glass Epoxy Resin)
: Less than 1.6mm
: Less than 3,000mm / min

Noise Level at 1m distance

Less than 70 dB (A)

Weight

740g

6

. SPECIFICATIONS AND DIMENSIONS

*  You may need to lower feed rate (mm / min) depending on the shape of tools being used or the thickness of work. 

Always check the milling condition before working.

Collet (CHB -

□□

)

ȭ

2.0 mm, 

ȭ

3.0 mm, 

ȭ

3.175 mm, 

ȭ

4.0 mm

<Option>

6 - 2  Outside View

Fig. 1

ȭ

24

ȭ

20.5

ȭ

10.8

ȭ

6.9

10

3

8

82

(13)

(6.1)

(109.1)

End of Spindle Area

ȭ

40

0 -0.01

7

. CONNECTION OF THE SPINDLE TO THE BRUSHLESS MOTOR

CAUTION

Make sure your hands and all interlocking parts of the Spindle and brushless motor are clean 
before connecting the Spindle to the brushless motor. This is critical in preventing contaminants 
from entering the Spindle or brushless motor.

Align the thread on the front end of the brushless 
motor and the rear of the Spindle, and turn the 
Spindle clockwise. If the drive shaft of the brushless 
motor does not engage properly to the drive dog 
on the Spindle, it may only turn aprroximately two 
threads before stopping.
DO NOT FORCE THEM TOGETHER. Loosen 
the Spindle from the brushless motor, rotate the 
Spindle shaft by hand then re-try. The drive shaft 
and the drive dog must be fully engaged. When 
fully engaged, secure the brushless motor and 
Spindle using the provided 27mm wrench (Fig. 2). 

27

Transmission Clutch

Tighten

Turn

Fig. 2

9

. CHANGING THE TOOL

CAUTION

WARNING

Do not open and close the collet while the brushless motor is running.

When the air is supplied to the inlet joint of the Spindle, the tool will be pushed out by 
exhausting the coolant air of brushless motor from the edge of Spindle. Be careful not to be 
damaged to the tool or be injured.

Use the air on-off valve through which the air can be exhausted. Do not use 2 way valve, 
because the 2 way valve is not echausted and the collet is not closed.

Do not open and close the collet before the tool is not installed. Because this will cause damage 
to the collet or loss of precision.

8

. CONNECTION OF AIR HOSE AND AIR SUPPLY

Securely connect the air hose to the brushless motor and air line kit to avoid accidental 
disconnection and injury to the operator during use.

CAUTION

Connect the provided 

ȭ

6mm Air 

Hose with lter and 3-way valve to 
Air Inlet Joint shown in Fig. 3.

Supply clean air from air 
compressor through air lter or air 
dryer to the 3-way valve at the set 
air pressure : from 0.55 - 0.6MPa 
(79.8 - 87psi).

Air Inlet Joint

3-way valve

Air Release

Dry Air

Air Supply
(Supply Side)

ȭ

6mm Air Hose with Filter

Fig. 3

Stop the motor (Or check if the motor is stopped).

Supply air pressure: from 0.55 - 0.6MPa (79.8 - 87psi) to Air Inlet Joint through 3-way valve. Then, the chuck 
will be opened. At the same time, the tool is pushed out by the air exhaust for the coolant of motor. So, need 
the tool holder not to be damaged to the tool.

Replace the tool.

Exhaust the air through 3-way valve. The collet will be closed and the tool can be xed.

WARNING

The Spindle is not a hand tool. It is designed to be used on CNC machines or special purpose 
machines.

Do not touch the cutting tool while it is running. It is very dangerous.

Wear safety glasses, dust mask, and use a protective cover around the Spindle whenever the 
Spindle is rotating.

Never connect, disconnect or touch the Power Cord Plug or Motor Cord Plug with wet hands. 
This may cause an electric shock.

Never operate or handle the Spindle and brushless motor until you have thoroughly read the 
Operation Manuals and safe operation has been conrmed.
1) To prevent injuries / damages, check the Spindle, brushless motor and cutting tool for 

proper installation, before operating the Spindle and brushless motor. 

2) Before disconnecting the Spindle and brushless motor, always turn the control power off 

and turn the compressed air supply to the CONTROLLER off. Then it is safe to remove the 
Spindle and brushless motor.

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.

When installing a tool, tighten the collet correctly and check again the collet before use. Do not 
over-tighten the collet. This may cause damage to the spindle.

Do not open and close the collet while the brushless motor is running.

Do 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.

Do not exceed the maximum recommended allowable tool speed. For your safety, use speeds 
below the maximum allowable speed.

Do not apply excessive force. This may cause tool slippage, tool damage, injury to the operator 
or loss of concentricity and precision.

CAUTION

Do not drop or hit this Spindle, as shock can damage to the internal components.

Do not connect this Spindle to the redutcion gear. This may cause collet breakage by overload.

Be sure to clean the collet, the inside of the spindle before replacing the tool. If ground 
particles or metal chips stick to the inside of spindle or the collet, damage to the collet or 
spindle can occur due to the loss of precision.

When cleaning a Spindle, stop the brushless motor and remove debris with a soft brush or a 
cloth. Do not blow air into the end of spindle area (refer to section " 6 - 2  Outside View ") with 
compressed air as foreign particles or cutting debris may get into the ball bearing.

Always clean the tool shank before installing the tool in the spindle.

When sizing the correct collet 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 insufcient tool shank gripping force. 

Select suitable products or tools for all applications. Do not exceed the capabilities of the 
Spindle or tools.

Do not stop the supplied cooling air to the brushless motor during operation of the machine.
Removing the air pressure from the brushless motor causes a loss of purging, allowing the 
Spindle to ingest coolant and debris. This will cause damage to the Spindle. 

Carefully direct coolant spray directly on the tool. Do not spray directly on the Spindle body. 
If large amount spray directly on the Spindle, it may cause excess load of the Spindle rotation 
with loss of durability to the Spindle.

Stop working immediately when abnormal rotation or unusual vibration are observed. 
Immediately, please check the content of section "  14. TROUBLESHOOTING  ".

Always check if the tool, collet, connection hose and supply air hose for damaged before and 
after operating.

If the collet show signs of wear or damage, replace it before a malfunction or additional 
damage occurs.

After installation, repair, initial operation, or long periods of non operation, please refer to 
section " 12. BREAK-IN PROCEDURE " detailed in Table. 2. When checking the Spindle, no 
vibration or unusual sound should be observed during rotation.

Do 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.

When using this Spindle for mass production, please consider the purchase of an additional 
Spindle to be used as a back-up in case of emergency.

RECOMMENDATIONS

Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of 
overhang to maintain high accuracy and safety.

NR40 -5100 ATC

Temperature

Humidity

Atmospheric Pressure

Operation Environment

0 - 40°C

MAX.75% (No condensation)

800 - 1,060hPa

Transportation and Storage 
Environment

-10 - 50°C 

10 - 85% 

500 - 1,060hPa

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