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Automatic Tool Replacement Spindle

NR50 -5100 ATC

OPERATION MANUAL

Thank you for purchasing Automatic Tool Replacement Spindle " NR50-5100 ATC ". This Spindle is designed 

for suited for PCB drilling. 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 classified as follows in accordance with the seriousness of the risk.

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.

 CAUTION

A hazard that could result in light or moderate bodily injury or damage 

to the device if the safety instructions are not followed.

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 confirmed.

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 fixed base, make sure the fixed 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 insufficient 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 supply cooling air for motor during operation of the machine.

Removing the air pressure from the Motor / Spindle causes a loss of purging, allowing the 

Motor / Spindle to ingest coolant. This will cause damage to the Motor / Spindle.

Carefully direct coolant spray to the tool. Do not spray directly on the Spindle body. If large 

amount splay directly on the Spindle, it may cause excess load of the motor 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 " 15. 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 " 13. 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.

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

NR50 - 5100 ATC

・・

1pc.

Collet 

φ

3.175mm

(CHR - 3.175)

・・

1pc.*

(For U.S. market 

φ

3.175mm

(CHR - 3.175))

 

Bar Wrench (K - 236)

・・

1pc.

Wrench (9 x 11), (12 x 14)

・・

Each 1pc.

Air Hose with Filter

6mm x 2m)

・・

1pc.

Inspection Card

・・

1pc.

Operation Manual

・・

1set

φ

D

φ

D

φ

D

検査成績表

Inspection Card

○○○○○○○○○○○

○○○○○○○○○

□□

○○○○

□□

.

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取扱説明書

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.

Website

:

Industrial Div. 

:  8:00 to 17:00 (CST)

   (closed Saturday, Sunday and Public Holidays)

:  +1 800 585 4675
:  +1 847 843 7664
:  +1 847 843 7622

:  www.nskamericacorp.com

Contact Us

Contact Us

For U.S. Market

Company Name

Business Hours

Telephone No.

e-mail

:  

:  8:00 to 17:00 (JST)
   (closed Saturday, Sunday and Public Holidays)

:  +81 289 64 3520

:  webmaster-ie@nsk-nakanishi.co.jp

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, hardened, stainless steel (SUS) with an outside diameter 

of 

φ

50mm.

The collet size is

φ

2.0mm,

φ

3.0mm,

φ

3.175mm,

φ

4.0mm,

φ

6.0mm,

φ

6.35mm.

6 - 1  Specifications

Model

NR50 - 5100 ATC

Maximum Motor Rotation Speed

50,000min

-1 

(rpm)

Spindle Accuracy

Less than 1

μ

m

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

Work

Thickess

F

: Less than

φ

2.0mm

: PC board (ex. Glass Epoxy Resin)

: Less than 1.6mm

: Less than 3,000mm / min

Weight

1,370g

Noise Level at 1m distance

Less than 70dB (A) 

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.

6 - 2  Outside View

5 1

9.55

128.6

106

12.5

End of Spindle Area

13

φ

20.5 

φ

20.9

φ

15.8 

φ

10.6

   φ

50 

-0.01

 

0

 

Fig. 1

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).

Tighten

Collet chuck

Loosen

9

11

12

14

Spindie

φ

D

φ

D

φ

D

Air Inlet Joint

φ

6Hose with filter

3-way valve

Air Inlet

Exhaust Air

clamping area

 

70

17

Reducer(

φ

6-

φ

4 Adaptor)

φ

4 Hose

Air Inlet Joint

φ

6Hose with filter

3-way valve

Air Inlet

Exhaust Air

27

Turn

Tighten

Transmission Clutch

Fig. 2

8

. CONNECTION OF AIR HOSE AND AIR SUPPLY

CAUTION

Securely connect the air hose to the brushless motor and air line kit to avoid accidental 

disconnection and injury to the operator during use.

Connect the provided 

φ

6mm Air Hose with filter and 3-way valve to Air Inlet Joint shown in Fig. 3.

Supply clean air from air compressor through air filter or air dryer to the 3-way valve at the set air pressure : 

from 0.55 - 0.6MPa (79.8 - 87psi).

Air Inlet Joint

φ

6mm Air Hose with Filte

Dry Air

Air Supply

(Supply Side)

3-way valve

Air Release

Fig. 3

When using the rear air inlet joint

CAUTION

The rear air inlet port is closed with an M5 screw before shipment. When changing the air inlet 

port location, remove the M5 screw to install an air inlet joint.

Use any one of the two air inlet port. Be sure to close the unused air inlet port with the removed 

M5 screw.

After installing the fitting, supply air and confirm that there is no air leakage, then proceed with 

the installation.

Please purchase the recommended commercially available air inlet fitting for the air inlet joint.

Recommended air inlet SMC is KQS04 - M5.

φ

6mm to

φ

4mm tubing reducer SMC is KQH04 - 06.

When installing the collet clamp / unclamp fittings, thoroughly read the instructions before connecting.

(Fig. 4)

Tighten

Collet chuck

Loosen

9

11

12

14

Spindie

φ

D

φ

D

φ

D

clamping area

 

70

17

Air Inlet Joint

φ

4mm Air Hose

φ

4mm Air Hose

Dry Air

Air Supply

(Supply Side)

3-way valve

Air Release

φ

6mm Air Hose with Filter

Reducer (

φ

6mm -

φ

4mm Adaptor)

Fig. 4

Collet (CHR - 

□□

)

φ

2.0mm, 

φ

3.0mm, 

φ

3.175mm, 

φ

4.0mm, 

φ

6.0mm, 

φ

6.35mm

<Option>

Temperature

Humidity

Atmospheric Pressure

Operation Environment

0 - 40°C

MAX.75% 

(No condensation)

700 - 1,060hPa

Transportation and Storage Environment

-10 - + 50°C

10 - 85%

500 - 1,060hPa

OM-K0537E  006

OM-K0537E006_スピンドル NR50-5100 ATC 取説 英_230124.indd   1

OM-K0537E006_スピンドル NR50-5100 ATC 取説 英_230124.indd   1

2023/01/24   9:31:58

2023/01/24   9:31:58

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