Foredom K1070 User Manual

Figure 5 brush assemblyexhaust ports

=

=

Figure 8

®

FOREDOM

Maintenance

motor brushes

The H.MH-170 has permanently lubricated
ball bearings that do not require lubrica­tion. Putting even a small amount of oil
into the handpiece can damage it.

Cleaning Handpiece

Use the Handpiece in as clean and dust
free an environment as possible.

If the Micromotor Handpiece is used
for woodcarving, it should be cleaned
after every use.

cord disconnected from control box, unscrew
the protective cap (see Figure 5) and use a
clean cloth to wipe dirt, chips or dust off
from the exhaust ports and inside the cap.
A cloth with a small amount of alcohol
solution can be used to clean the outside
of the handpiece if necessary.

Do not use any other cleaning fluids
or immerse handpiece in any liquid.
The H.MH-170 Handpiece is
not autoclaveable.

With handpiece power

Checking/Changing
Carbon Brushes

A spare set of carbon brushes is supplied
with each handpiece. Depending on how
long the handpiece is used each day, the
brushes should be checked for wear
periodically (about every
and replaced when the brush is less than
2mm (5/64

1. With handpiece power cord disconnected
from control box, unscrew protective cap
from rear of motor (see Figure 5) by
turning in counterclockwise direction while
gripping the handpiece body. (It has a
standard right hand thread.)

2. With small crosspoint screwdriver remove
screws and brush assemblies one at a time
when reusing existing brushes. Check length
of carbon brush from spring to curved
side of brush.

″) long.

Brushes should be r

eplaced (if less than 2mm in length)

r
one at a time.

Pay careful attention to the orientation of the
brush curve in relation to the curve of the
motor armature. This same orientation must
be maintained when replacing brushes.

200 hours of use)

emoved,

and

=

protective cap

Carbon Brushes continued

3. Reinsert brush assembly or new

assembly into brush tube. Replace and
tighten screws.

4. Screw protective cap back onto rear
of motor housing so that top of brush
assembly is completely tightened.

5. If new brushes were used, run the
handpiece for 30 minutes at half-speed
no load to confirm proper function,
before use.

Figure 6

chuck wrench

spare pair
of motor brush-

spare fuse

chuck
joint
wrench

Micromotor Accessories

The K. 1070 Micromotor Kit comes with a
chuck wrench and chuck joint wrench for
changing collets, a spare fuse, and spare
pair of motor brushes as shown in Figure 6.

Installing/Changing Collets

The Handpiece comes with a 2.35mm

collet installed. Optional 1/8

(3/32

″)
3mm collets are available separately . They
can be installed with the collet changing
wrenches, described below.

Caution: Finger tightening is not
enough. A wrench must be used to
tighten the collet fully several turns
beyond the point of initial resistance.
If collet is too loose or absent, spindle
will not turn and damage will occur.

1. With a test bur in the collet, turn the

Locking Ring toward the secure“S” (closed)
position (see Figure 4 on reverse.)

2. Place the octagonal hole of wrench over
the brass nose cone and unscrew the nose
cone assembly from the handpiece body
(shown in
Figure 7.) Do
not remove
locking ring
or spring.

Figure 7

″ and

3. Carefully remove the spindle assembly
from the nose cone, see Figure 8.

4. Insert the
chuck joint
wrench into the
cross section of
the back end of
the spindle
assembly. Insert
the collet head into the appropriate size
triangle hole on the chuck wrench and turn
the chuck wrench counterclockwise to
loosen the collet while holding the chuck
joint wrench with your other hand,
see Figure 9 above.

5. Remove collet and insert new size collet,
with test bur. Use the triangular hole in
chuck wrench to re-tighten collet by turning
clockwise. Make sure to securely tighten
collet or the spindle will not turn. Align
cross-shaped motor drive to spindle by
rotating the collet during installation.
Re-attach and tighten nose cone.

Figure 9

chuck
wrench

test spindle
b

ur assembly

collet

Repair Services

Authorized repair service is available at the
Foredom factory in Bethel, CT. Send items for
repair to the factory marked “Attention:
Repair Department”. Enclose the item(s), a
packing list, and information regarding the
problem or repairs required. Estimates of
repair cost will be made upon request. It is
our policy not to proceed with a repair
without your approval if the cost (labor plus
parts) is more than fifty percent of the cost
for a new replacement. You will be notified
and advised of the cost to repair and to pur­chase a new replacement. Please allow three
business days for an estimate to be done and
five to seven business days for repair work
to be completed after we receive your
approval to proceed.

Please retain your proof of purchase for warranty repairs.

Warranty

Foredom warrants its product to be free of
defects in material or workmanship for a
period of one year after purchase. During
the warranty period, the defective product
will be repaired or replaced without
charge or, at our option, the purchase price
will be refunded. This warranty does not
cover damage caused in transit or by
accident, misuse, or ordinary wear.

ALL IMPLIED WARRANTIES, INCLUDING
BUT NOT LIMITED TO WARRANTIES OF
FITNESS AND MERCHANTABILITY, ARE
HEREBY LIMITED IN DURATION TO A
PERIOD ENDING ONE YEAR FROM DATE
OF PURCHASE, AND
LIABLE OR RESPONSIBLE FOR ANY
SPECIAL OR CONSEQUENTIAL DAMAGES.

WILL NOT BE

WE

Contact Information

If you have a warranty issue with your
Foredom power tool please use the
contact information below

information on Foredom machines, hand­pieces or accessories, contact your local
dealer. When no local dealer is available,

F-1278 n 6/22

.

or more

F

Printed in U.S.A.

Repair or replacement will be made at our
option if the product is returned postpaid
to:

The Foredom Electric Company,
16 Stony Hill Road, Bethel, CT 06801

All warranty repairs must be done at the
factory at the address above. We will not
pay any shipping or transportation charges.
This warranty only covers the original pur­chaser of the product. Proof of purchase
may be requested. Some states do not allow
limitations on how long an implied warran­ty lasts, so the above limitation may not
apply to you. This warranty gives you specif­ic legal rights, and you may also have
other rights which v

call,

,

write

The Foredom Electric Company

16 Stony Hill Road, Bethel, CT 06801

203-792-8622 F

el:

T

[e-mail]

ary from state to state

or email:

fax,

ax:

203-796-7861

Visit our website:

www.foredom.com

c

huck joint

wrench

Operation and
Maintenance Manual for
K.1070 Micromotor Kit

HP4-917
Control

HP4-933
Cradle

HP4-960
Foot Control

H.MH-170
Handpiece

For Your Safety:

Read this Manual before operating your
Foredom Micromotor Power Tool.

.

Always wear eye protection while using
the Foredom Micromotor Handpiece.

Safety Instructions

A Micromotor Handpiece is a high
speed rotary power tool which can
be dangerous and cause serious
injury if it is not used properly.
NEVER operate it without wearing
eye protection.

• ALWA YS wear proper eye and

face protection.

• ONLY use accessories rated for

speeds of 38,000 rpm or higher
when operating this micromotor.

• ALWAYS observe the manufacturer's

maximum speed rating when using any
accessory other than Foredom’s.

• NEVER use or continue to use any

accessory which appears to be damaged,
loose, vibrating, bent, or out of balance.
Inspect each accessory for cracks or flaws
before use

• ALWAYS insert the shank or arbor of

an accessory or mandrel into the collet or
chuck of the handpiece as far as possible
in order to provide proper support and
close the collet or chuck securely.

NOT

less than 1

• NEVER use excessive side pressures

which may tend to bend or break the
shank or arbor of an accessory. Let the
speed of the accessory do the work.

• DO NOT stall the motor by jamming or

using excessive pressure on the mounted
point, buff, wheel or accessory. This can
result in damage to the motor.

• WEAR a dust protector to prevent the

inhalation of harmful dust or debris from
grinding, carving or other operations
performed with this power tool.

• DO NOT cover the ventilation slots or

handpiece motor with cloth or tape. Air
must pass freely through the intake and
exhaust ventilation slots to properly cool
the motor. If the power cord or plug to
the handpiece is damaged,
replace immediately.

• NEVER operate with a damaged

power cord.

• USE a dust collector (v

to pull sawdust, grinding dust, or other
debris aw
micromotor intak

.

DO

use accessories with shanks that are

″ long.

repair or

acuum system)

ay from the work area and the

e vents

.

• NEVER turn on or start the

Handpiece while chuck is in open
(unlocked) position.

the handpiece. Always operate and store
it with a bur or other accessory in the
chuck and with the chuck in the
closed position.

• NEVER plug the Handpiece into

This can damage

the Variable Speed Foot Control
Connection Port on the back of
the Control Box.

• ALWAYS plug the Handpiece into

the Handpiece Connection Port on
the Front of the Control Box.

• DO NOT operate the handpiece in the

presence of any flammable liquid or gas.

Figure 1 Front Panel

Illuminated
Power
On/Off
Switch

Overload
Indicator
Light

Speed Control Selector
Switch (Hand or Foot)

Dial Speed Control

Rotation
Selection Switch

Handpiece
Connection
Port

Assembly Instructions

Do not plug into a power outlet
before connecting the handpiece or
foot pedal. Check to see that the
voltage selector switch on the
back of the control box, is set to
the voltage to be used–110 or
220 volt.

Connecting Handpiece

Attach the micromotor handpiece to the
control box by plugging the coiled cord
into the Handpiece Connection Port on
the lower right side of the front control
panel (Figure 1). Use keyway for proper
alignment when plugging in the cord.

NEVER plug the handpiece into the
Variable Speed Foot Control
Connection P

ort.

Connecting the Variable
Speed Foot Control

The Variable Speed Foot Control is suit­able for either 110 or 220 volt operation.

Attach it by inserting
the connector into the
Variable Speed Foot
C

ontrol connection
port on the rear panel
of the control (Figure

2) using keyway for
proper alignment. It is
not necessary to have
the foot pedal connected to the control
box to operate the dial speed control. The
Micromotor control and handpiece are
now ready to operate.

Connecting Power Cord

Before connecting the power cord plug
(Figure 2) to a power outlet, select the
proper voltage (110 or 220v) on the back
of the control box. Put the On/Off Selector
Switch in the OFF position and turn the

Figure 2 Rear Panel

Power
Cord

Variable Speed
Foot Control
Connection Port

dial speed control to the OFF speed posi­tion.

Be sure that the handpiece chuck is

On/Off Foot
Connection
Port

closed with (or without) an accessory in

Operating the handpiece with the

it.
chuck in the open position can
cause severe damage to the motor.

Now plug in the power cord to an AC
current outlet. See Figure 2 to select the
Hand/Foot and Forward/Reverse switches.

Connecting Optional
On/Off F

This switch (p/n HP4-927)
is available separately and
attaches by inserting the
connector into the On/Off
foot connection port on
the rear panel of the con­trol (Figure 2) using keyway for proper
alignment.
the motor on and off without changing
the speed set by the dial.

oot Switch

his switch allows you to turn

T

Voltage Selector
Switch-110 or 220
volt

HP4-927

Operating Instructions
for HP4-917 Control Box

1. Power On/Off Switch:

When the Power On/Off Switch is in the
ON position the switch lever will light up.

This switch must be in the ON posi­tion for the handpiece to run with
either the dial speed control or the
foot speed control selected.

Always turn the Dial and Power
On/Off Switch to the Off position
when not in use.

2. Hand or Foot Selector Switch:

With the Dial and Power On/Off Switch in
the OFF position, select either foot or hand
speed control.

• With the Speed Control Selector Switch in

the Hand position, the handpiece will run
at the speed set by the Dial Speed Control.

• With the Speed Control Selector Switch in

the Foot position, the handpiece will not
operate until the Foot Pedal is depressed.

3. Forward/Reverse Rotation
Selection Switch:

On/Off Switch in OFF position, select the
desired handpiece rotation by moving the
switch to Fwd.
REVERSE rotation.

piece rotation direction while in
operation is not recommended.

4. Regulating Speed:

• The Dial Speed Control varies the speed

of the handpiece from minimum to
maximum when the Speed Control
Selector Switch is in the Hand position.

• The Dial also controls the maximum

speed that can be reached when using
a foot pedal.

To achieve maximum speed with a
foot pedal, the dial speed control
must be turned all the way to the
Max setting.

5. Handpiece Overload Protection:

If the Handpiece is used with a locking
ring left in the
in an overload condition caused by exces­sive workload, it will trigger the overload
circuit protector. The red overload light
will come on with an audible alarm,
the handpiece will stop. Immediately turn
off control by putting the P
switch in OFF position.
in ON position again when overload
condition is corrected. There may be a
time delay of several seconds before
the overload trip resets.

With the Power

for FORWARD or Rev. for

Changing hand-

“R”position (see F

Put power switch

ig.4), or

and

ower ON/OFF

6. Fuse Protection: The internal circuit

is protected by a 3.15 Amp, 5mm x
20mm, Bussman Type GDC-3.15A or
equivalent fuse.A blown fuse usually
indicates a short circuit condition on the
circuit board. The blown fuse should
require that the board be checked by a
qualified technician. Disconnect the
power cord, unscrew the four feet and
remove the baseplate. The fuse is located
in the top left corner of the circuit board.
Replace fuse and reassemble the
baseplate with four feet. Re-connect the
power cord and test unit operation.

Figure 3

4-feet baseplate fuse

=

H.MH-170
Micromotor

This Handpiece is intended only for
fine finishing and detailing work. It
should not be used to remove large
amounts of material in carving or
other applications. If the handpiece
is misused or abused, it will not be
covered under warranty.

Figure 4

Collet Size

3/32″(2.35mm) to 1⁄16″ 1⁄16″ HPL4-3233
1⁄8″ to 1⁄16″ 1⁄16″ HPL4-3234
3mm to 3/32″(2.35mm)

1/8″ to 3/32″(2.35mm) 3/32″(2.35mm)

3mm to 1.6mm

Handpiece

Accessory
Shank Size

3/32

″(2.35mm)

1.6mm

Part No.

HPL4-3235

HPL4-3236
HPL4-3237

Changing Accessories

Burs and other accessories can be
inserted or removed from the handpiece
collet when the collet is open.
To open the collet–

1. Put the power switch on control box in
OFF position and wait for handpiece to
stop rotating.

2. Twist locking ring toward “R” or
Remove (See Figure 4 below) by turning
clockwise until collet snaps open.

3. Insert shank of accessory fully into
collet for maximum support.

use accessories with shanks less
than 1

″ long.

4. Twist knurled grip toward “S” or
Secure (See Figure 4) by turning counter­clockwise until it snaps to lock collet.

Never turn power on to handpiece
when collet is open.

a locked position and will not turn which
will result in damage to the motor.

Collets Available for the
H.MH-170 Handpiece
Collet Size Part No.

2.35mm(3/32″) Collet (supplied) HP4-117

3.18mm 1/8″) Collet (optional) HP4-117B
3mm Collet (optional) HP4-117C

Instructions for changing collets
on reverse.

Collet Adapters

(listed at left)
Use collet adapters with different shank
size accessories without having to
change collets

.

Do not

The spindle is in