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5. FEATURES
① MFC - 300M is the smallest 90° head available.
② Best for removing edges & burrs or correction of drilled holes inside small diameter holes.
③ MFC - 300 is an Attachment for grinding axis for deep holes of special purpose for
shank diameter
1.6mm.
6. SPECIFICATIONS AND DIMENSIONS
6 - 1 Speci cations
Model
MFC - 300M
Maximum Motor Rotation Speed Less than 15,000min
Applicable Motor
ENK - 410S, ENK - 250T (Emax EVOlution)
IM - 300, IM - 301 (ROTUS)
Vibration Level
Less than 2.5m / s
Weight
47g
Noise Level at 1m distance
Less than 70dB (A)
Temperature
Operation Environment
0 - 40°C
Transportation and Storage
-10 - 50°C
Environment
< Option >
Collet
K - 252, K - 253
WARNING
Do not exceed the " Maximum Motor Rotation Speed " .
6 - 2 Outside View
① MFC - 300M
66.1
6.8
② MFC - 300S
66.1
8.5
6.9
7.
CONNECTION OF THE ATTACHMENT TO THE MOTOR
CAUTION
Make sure your hands and all interlocking parts of the Attachment and motor
are clean before connecting the Attachment to the motor. This is critical to
preventing contaminants from entering the Attachment or motor.
Align the thread on the front end of the motor and the rear of the Attachment, and turn
the Attachment clockwise. If the drive shaft of the motor does not engage properly to the
drive dog on the Attachment, it may only turn approximately two threads before stopping.
DO NOT FORCE THE TOGETHER. Loosen the Attachment from the motor, rotate the
Attachment shaft by hand then re-try. The drive shaft and the drive dog must be fully
engaged. When fully engaged, secure the motor and Attachment using the provided pin
wrench (K - 233) (Fig. 4).
Transmission Cluch
8.
CHANGING THE CUTTING TOOL
CAUTION
・ Tool shank diameter
1.6mm. NAKANISHI make a wide precision cutting tools.
Please select from our " Micro grinder & Tools Catarogu ".
・ Do not tighten the collet without inserting a cutting tool or dummy bur, as this
will result in damage to the collet.
MFC - 300S
-1
(rpm)
2
50g
Humidity
Atmospheric Pressure
MAX.75%
800 - 1,060hPa
(No condensation)
10 - 85%
500 - 1,060hPa
91.8
13.3
108.5
Fig. 2
91.8
13.3
109.4
Fig. 3
Pin Wrench (K - 233)
Tighten
Turn
Fig. 4
① Insert the chuck wrench into the back of the angle head and rotate the knob 1 / 4 turn
to release the cutting tool.
Chuck release
Cutting Tool
Head
② Insert a new cutting tool into the inside of the collet, and turn the knob of the chuck
wrench clockwise to x the cutting tool.
9.
REPLACING THE COLLET
① Remove the cutting tool according to the section " 8. CHANGING THE CUTTING
TOOL " procedure above.
② Insert clutch at the edge of the chuck wrench into the head counterpart of the
Attachment. And turn the knob of the chuck wrench counterclockwise to remove the
collet.
③ Attach a new collet into the edge of the chuck wrench, and set the clutch of the chuck
wrench to the head counterpart, make 4 - 5 turns of knob clockwise.
④ Insert the cutting tool into the inside of the collet, and turn the knob of the chuck
wrench clockwise to x the cutting tool.
10.
APPLICATIONS
For example, enable for removing edges inside small diameter holes (Fig 7). If the shank
of cutting tool for removing edges is cutting too long, attach the cutting tool to Attachment
only after trimming to the appropriate length.
11.
TROUBLESHOOTING
If a problem or concern occur, please check the following items prior to consulting your dealer.
Trouble
Cause
Spindle does not
The spindle ball
rotate or rotate
bearings have been
smoothly.
damaged.
The motor has been
damaged.
Overheating
Cutting debris has
during rotation.
contaminated the ball
bearing, and the ball
bearings are damaged.
Abnormal vibration
Using bent cutting tool.
or noise during
Cutting debris has
rotation.
contaminated the ball
bearings.
The spindle ball
bearings have been
damaged.
Cutting tool
Collet is not correctly
slippage.
installed.
The collet is worn.
High run-out.
Cutting tool is bent.
The collet is worn.
Inside of the spindle is
worn.
Contaminants inside the
collet or the spindle.
The spindle ball
bearings have been
damaged.
In case of using a brushless motor, refer to the Emax EVOlution Control Unit Operation
Manual.
In case of using an air motor, refer to the ROTUS air motor and the Air Line Kit Operation
Manuals.
12.
DISPOSAL OF THE ATTACHMENT
When disposal of an Attachment is necessary, follow the instructions from your local
government agency for proper disposal of industrial components.
Contents are subject to change without notice.
Prongs
Knob
Chuck Wrench
Loosen
Fig. 5
Collet
Fig. 6
MFC - 300
(M Type)
Fig. 7
Inspection / Corrective Action
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Replace the motor.
(Return to NAKANISHI dealer service.)
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Replace the cutting tool.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Check and clean the collet. Reinstall
the collet and re-tighten. Check the
accuracy.
Replace the collet.
Replace the cutting tool.
Replace the collet.
Replace the spindle shaft.
(Return to NAKANISHI dealer service.)
Clean the collet and the inside of the
spindle.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
2016 . 07 . 05 002
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