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OPERATION MANUAL

NR50 -5100 ATC RS

Automatic Tool Replacement Spindle

Thank you for purchasing Automatic Tool Replacement Spindle " NR50 - 5100 ATC RS ". 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.

001

2

. BASIC PACKAGE

Table.

1  Packing List Contents

NR50-5100 ATC RS

・・

1pc.

Collet chuck

ȭ

3.175mm 

(CHR - 3.175 RS) 

・・

1pc.*

Bar Wrench (K - 236)

・・

1pc.

Wrench (9 x 11)

・・

1pc.

Wrench (12 x 14)

・・

1pc.

Air Hose with Filter

(

ȭ

6mm x 2m)

・・

1pc.

Inspection Card

・・

1pc.

Operation Manual

・・

1set

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.

* The Collet chuck is attached to the Spindle.

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.
Web Address

:
: 8:00am to 17:00pm

(closed Saturday, Sunday and Public Holidays)

: +81 (0) 289-64-3520
[email protected]

For Other Markets

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.

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.) 

11

9

12

14

᳨ᰝᡂ⦼⾲

Inspection Card

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 

ȭ

50mm.

The Collet chuck size is

ȭ

3.0mm,

ȭ

3.175mm,

ȭ

4.0mm,

ȭ

6.0mm,

ȭ

6.35mm.

6 - 2  Outside View

0 -0.01

ȭ

10.6

ȭ

13.6

ȭ

29.6

ȭ

50

End of Spindle Area

(128.5)

(9.5)

106

(13)

(5.2)

12.5

ȭ

20.5

ྲྀᢅㄝ᫂᭩

OPERATION MANUAL

Fig. 1

8

. CONNECTION OF AIR HOSE AND AIR SUPPLY

Connect the provided 

ȭ

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.

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

recommended air inlet

SMC is KQ2S04-M5N.

ȭ

6mm to

ȭ

4mm tubing reducer SMC is KQ2H04-06A.

When installing the collet chuck clamp / unclamp fittings, thoroughly read the instructions before connecting.
(Fig. 4)

Fig. 3

Fig. 4

When using the rear air inlet joint

Air Inlet

Exhaust Air

Air Inlet Joint

ȭ

6mm Air Hose with Filter

3-way valve

Air Inlet

Exhaust Air

Reducer (

ȭ

6mm -

ȭ

4mm Adaptor)

ȭ

4mm Air Hose

Air Inlet Joint

ȭ

6mm Air Hose with Filter

3-way valve

1

. CAUTIONS FOR HANDLING AND OPERATION

 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.

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

This 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 brushless motor and Spindle until you have thoroughly read the 
Operation Manuals and safe operation has been confirmed.
1) To prevent injuries / damages, check the brushless motor, Spindle and cutting tool for 

proper installation, before operating the brushless motor and Spindle.

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

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

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 chuck correctly and check again the collet chuck 
before use. Do not over-tighten the collet chuck. This may cause damage to the Spindle.

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

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 reduction gear. This may cause collet chuck breakage by 
overload.

Be sure to clean the collet chuck, the inside of the Spindle before replacing the tool. If ground 
particles or metal chips stick to the inside of Spindle or the collet chuck, damage to the collet 
chuck 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 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. 

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

Do not stop the brushless motor and Spindle while coolant spray is being applied to the 
cutting tool. Removing the air pressure from the brushless motor and Spindle causes a loss of 
purging, allowing the brushless motor and Spindle to ingest coolant. This will cause damage to 
the brushless motor and 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 " 14. TROUBLESHOOTING". 

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

If the collet chuck 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.

Collet chuck (CHR-

□□

RS)

ȭ

3.0mm, 

ȭ

3.175mm, 

ȭ

4.0mm, 

ȭ

6.0mm, 

ȭ

6.35mm

<Option>

7

. CONNECTION OF THE SPINDLE TO THE

 

BRUSHLESS MOTOR

Fig. 2

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

Turn

Tighten

CAUTION

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

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.

6 - 1  Specifications

Model

NR50 - 5100 ATC RS

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

ȭ

2.0mm

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

Weight

1,370g

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.

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.

OM-K0668E

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