Nakanishi NRR-2651 Operation Manual

Lever Type Spindle
NRR-2651
OPERATION MANUAL
Thank you for purchasing the Lever Type Spindle NRR-2651. This spindle has a simple lever operated collet chuck.
No wrenches are required for tool changing. This spindle is designed for cutting PC boards. The E2550 <Control
Unit>, <Brushless Motor>, and <Air Line Kit (AL-0201)> are required to drive this spindle. Read this Operation
Manual carefully before use. Also read E2550 <Control Unit>, <Brushless Motor>, and <Air Line Kit (AL-0201)>
Operation Manuals.
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 or
damage to the device. These are classified as follows in accordance with the seriousness of the risk.
Class
A safety hazard could result in bodily injury or damage to the device if the
WARNING
safety instructions are not properly followed.
A hazard that could result in light or moderate bodily injury or damage
CAUTION
to the device if the safety instructions are not followed.
WARNING
① The spindle is not a hand tool. It is designed to be used on CNC machines or special purpose
machines.
② Do not touch the cutting tool while it is running. It is very dangerous.
③ Wear safety glasses, dust mask, and use a protective cover around the spindle whenever the
spindle is rotating.
④ Never connect, disconnect or touch the Power Cord Plug and Motor Cord Connector with wet
hands. This may cause an electric shock.
⑤ Stop the motor prior to operating the chuck release lever.
⑥ Never operate or handle the spindle until you have thoroughly read the owner's manual and
safe operation has been confirmed.
1 ) To prevent injuries / damages, check the spindle and cutting tool for proper installation,
bofore operating the spindle.
2 ) Before disconnecting the spindle, always turn the control power off and turn the compressed
air supply to the control unit off. Then it is safe to remove the spindle.
⑦ Make sure that lever position is LOCK before rotating with mounting cutting tool.
⑧ Do not use bent, broken, chipped, out of round or sub-standard tools as they may cause
shatter or explode. Tool 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.
⑨ Do not exceed the maximum recommended allowable tool speed. For your safety, use speeds
below the maximum allowable speed.
⑩ Do not apply excessive force. This may cause tool slippage, tool damage, injury to the operator
or loss of concentricity and precision.
CAUTION
① Do not drop or hit the spindle, as shock can damage to the internal components.
② Do not connect this spindle to the reduction gear. This may cause collet chuck breakage by
overload.
③ 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.
④ When 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.
⑤ 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
⑥
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.
⑦ Select suitable products or tools for all applications. Do not exceed the capabilities of the
spindle or tools.
⑧ Carefully direct coolant spray to the tool. Do not spray directly on the spindle body.
⑨ Stop working immediately when abnormal rotation or unusual vibrations are observed.
Afterwards, please check the content of section 11 "TROUBLESHOOTING".
⑩ Always check if the tool, collet chuck are damaged before and after operating.
⑪ If the collet chuck show signs of wear or damage, replace it before a malfunction or additional
damage occurs.
⑫ After installation, repair, initial operation, or long periods of non operation, please refer to
section 9. "BREAK-IN PROCEDURE" detailed in Table 1. When checking the spindle, no
vibration or unusual sound should be observed during rotation.
⑬ 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.
⑭ When using the spindle for mass production, please purchase the another spindle as a spare
in case of emergency.
2 . FEATURES
① This spindle has a simple lever operated collet chuck. No wrenches are required for tool changing.
② The spindle housing is made from precision ground, hardened, stainless steel (SUS) with an outside diameter
of 25 mm.
③ Various sizes of collet chucks are available CHB-2.0mm, 3.0mm, 3.175mm and 4.0mm. Standard collet chuck
is CHB-3.175mm. (For U.S. market CHB-3.175mm.)
3 . SPECIFICATIONS AND DIMENSIONS
3 - 1 Specifications
Model
Maximun Motor Rotation Speed
Applicable Motor
※ This spindle can not use the reduction gear.
*Note 1
Milling Capacity
(Cutting or Milling PC boards with an end mill)
Weight
Note 1: 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.
OM-K0430E
Degree of Risk
NRR - 2651
-1
50,000min
EM25N - 5000 - 4M / 5M / 8M
EM25N - 5000 - J4 / J5 / J8
End Mill Size : Less than 1.0mm
Work : PC board (ex. Glass Epoxy Resin)
Thickness : Less than 1.6mm
-1
f : Less than 5,000mm/min
330g
・ Collet Chuck* 3.175mm ( CHB-3.175 ) ・・1pc.
( For U.S. market 3.175mm ( CHB-3.175 ))
・Wrench (10 × 10) ・・1pc.
<Option>
Collet Chuck (CHB- □□ )
3 - 2 Outside view
002
2.4
5.5
4 . CONNECTING TO THE MOTOR
CAUTION
・ 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.
・ The new drive clutch is (+) configuration. The (+) drive spindles were designed to be used with (+)
drive motors.
OK
Transmission Clutch
The connection part The connection part
"+" is "concave" "+" is "convex"
Align the threads on the front end of the motor and the rear end of the spindle, and turn the spindle clockwise.
If the drive shaft of the motor does not engage the drive dog on the spindle, the spindle could not be turned.
DO NOT FORCE. Turn the spindle back a few threads, rotate the tool by hand to engage the drive shaft and the
drive dog, and make the final turns with provided 22mm wrench. (Fig. 3)
5 . CHANGING THE TOOL
CAUTION
Always stop the motor before operating the collet chuck release lever.
RECOMMENDATION
Please set the tools to minimize the overhang amount for
maintaining high accuracy.
① Stop the motor and check that the motor is not rotating
before replacement.
② Turn the Lever counterclockwise to loosen the collet chuck
and to remove the tool.
③ Inset the replacement tool into the collet chuck.
Turn the Lever clockwise all the way until it snaps to tighten
the collet chuck.
6 . REPLACING THE COLLET CHUCK
① Turn the Lever counterclockwise.
② Place the provided 10mm wrench on the spindle
shaft to be fastened.
③ Place the provided 6.1mm wrench on the collet
chuck and turn it counterclockwise to loosen the
collet chuck. And remove the collet chuck from
the spindle shaft together with the tool.
④ Remove the tool from the collet chuck.
⑤ Insert the replacement collet chuck and turn it
clockwise to tighten.
⑥ Tighten lightly with the provided 10mm and 6.1mm
wrenches.
⑦ Turn the Lever to the Lock position.
Standard Accessories
・Wrench (6.1 × 8) ・・1pc.
・Wrench (22 × 27) ・・1pc.
・Operation Manual ・・1 set.
*The collet chuck is attached to the spindle.
2.0mm, 3.0mm, 3.175mm, 4.0mm
7.5
6.9
(2.6)
30
(35.8) 20
38.8 (39.3)
78.1 13.3
Fig. 1
Not OK
Transmission Clutch Transmission Clutch
The connection part The connection part The connection part
"+" is "concave" "-" is "convex" "-" is "concave"
Fig. 2
Transmission Clutch
Tighten
Turn
22
Fig. 3
Fig. 4
Tool
Spindle Shaft
Fig. 5
Not OK
The connection part
"+" is "convex"
OPEN
LOCK
Collet Chuck
Loosen
Tighten