Nakanishi ERA-270 Operation Manual

90° Angle Torque Attachment
OPERATION MANUAL
Thank you for purchasing the 90 ﾟ Angle Torque Attachment ERA-270. This
Attachment for Espert 500 Control Unit and Espert 500 motor which has been
designed for grinding and processing of cross hole. The Espert 500 Control Unit
and Espert 500 motor are required to drive this Attachment. 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.
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
A safety hazard could result in bodily injury or
WARNING damage to the device if the safety instructions are not
properly followed.
A hazard that could result in light or moderate
CAUTION bodily injury or damage to the device if the safety
instructions are not followed.
WARNING
This Attachment is designed for hand use. Never install this
①
Attachment or any hand tool on a machine such as a special
purpose machine, NC lathe or mill.
Do not exceed the " Maximum Allowable Motor Rotation Speed "
②
(Refer to " 2 - 1 Specifications ").
When sensing that the Attachment and motor are overheated
③
during operation, reduce the working force or the motor rotation
speed, or stop the operation until the Attachment cools down
before restarting.
Do not touch the cutting tool while it is rotating. It is very dangerous.
④
Always wear safety glasses, dust mask and use a protective
⑤
cover.
When installing a cutting tool, tighten the collet chuck correctly
⑥
and recheck the collet chuck before use. Do not overtighten the
collet chuck. This may cause damage to the spindle.
Do not exceed 13mm of overhang for mounted grindstones as
⑦
shown in Fig. 1. If the overhang must exceed 13mm, reduce the
motor speed in accordance with Table 1.
Do not use bent, broken, chipped, out of round or sub-standard
⑧
cuting tools as they may cause shatter or explode.
The cutting tool with cracked, bended may cause some injury to
operator.
When using a new cutting tool, rotate it in a low speed and
increase speed gradually for safety.
Always operate cutting tools within the cutting tool manufacturer's
⑨
recommended speed limits. Use of a cutting tool higher than the
manufacturer's recommended speed limits could cause damage
to the spindle and injury to the operator.
Do not apply excessive force. This may cause tool slippage, tool
⑩
damage, injury to the operator, loss of concentricity and precision.
Table 1. Overhang and Speed
Overhang ( mm ） Max. Speed ( min
20 N x 0.5
25 N x 0.3
50 N x 0.1
*N=Max. Operating Speed with 13mm overhang.
OM-K0210E 003
Degree of Risk
)
-1
13
Fig. 1
CAUTION
Do not drop or hit this Attachment, as shock can cause damage
①
to the internal components.
Be sure to clean the collet chuck, the spindle taper and threads
②
before replacing the cutting 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 Attachment, stop the motor and remove dirt
③
with a brush or a cloth. Do not blow compressed air into the
Attachment. Foreign particles or cutting chips may get into the
ball bearings.
Always clean the cutting tool shank before installing the tool in
④
the spindle.
When sizing the correct collet chuck size to the cutting tool
⑤
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 cutting tool shank gripping force.
Select suitable products or tools for each application. Do not
⑥
exceed the capabilities of the Attachment or cutting tools.
Keep everything in order not to place the rag which could be
⑦
caught near the hand tool.
Stop operating immediately when abnormal rotation or any
⑧
unusual vibrations are observed. Afterwards, please check the
content of section 6 "TROUBLESHOOTING".
Always check if the cutting tool, collet chuck is damaged before
⑨
and after operating.
If the collet chuck show signs of wear or damage, replace it
⑩
before a malfunction or additional damage occurs.
No lubrication is required because grease impregnated ball
⑪
bearings are used.
After repair, initial operation, or long periods of non operational
⑫
time, please use the following break-in procedure. Start rotating
slowly and over a short period of time, then increase the speed
gradually until reaching the maximum allowable speed.
Do not disassemble, modify or attempt to repair the Attachment.
⑬
Additional damage will occur to the internal components. Service
must be performed by NSK NAKANISHI or an authorized service
center.
2 . FEATURES
2 - 1 Specifications
Model
Reduction Ratio
Maximum Allowable Motor
Rotation Speed
Maximum Motor Rotation Speed
at the Cutting Tool
Applicable Motor
Weight
Vibration Level
Noise Level at 1m distance
Standard Accessories
・Collet Chuck φ3.0mm (CHS - 3.0) or φ3.175mm (CHS - 3.175)・・1pc.
・Wrench (7 x 5.1)・・1pc.
・Wrench (20 x 24)・・1pc.
<Option>
Collet Chuck φ0.8mm - φ3.0mm in 0.1mm increments and
(CHS - □□ )
φ2.35mm, φ3.175mm
WARNING
Do not exceed the " Maximum Allowable Motor Rotation Speed ".
・
When sensing that the Attachment and motor are overheated
・
during operation, reduce the working force or the motor rotation
speed, or stop the operation until the Attachment cools down
before restarting.
ERA - 270
1 / 1.5
Less than 27,000min -1 (rpm)
Less than 18,000min -1 (rpm)
ENK - 500C・ENK - 500T
107g
Less than 2.5m / s
2
Less than 70dB (A)
・Wrench (8 x 5)・・1pc.
・Operation Manual・・1set.
* The collet chuck is attached to the spindle.