Fein KBM 50 Q Manuel utilisateur

MVK 03 / 07

Alle Rechte bei FEIN, insbesondere für den Fall der Schutzrechtsanmeldung.

Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

KBM 50 Q (X)

MVK 03 / 07

Alle Rechte bei FEIN, insbesondere für den Fall der Schutzrechtsanmeldung.

Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

Table of Contents

1. Technical Data

2. Maintenance

3. Electrical Functional Testing

4. Disassembly of the Core Drill Unit

5. Assembly of the Core Drill Unit

6. Tools

MVK 03 / 07

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Fein Repair Tool

0. Productinformation

Based on some breakdowns on gear housings in the past, stripped thread on the

clamping lever , we mounting a Helicoil –insert in the gear box serially since

Mai 2010. ( siehe picture )

MVK 03 / 07

Alle Rechte bei FEIN, insbesondere für den Fall der Schutzrechtsanmeldung.

Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

1. Technical Data

Order Reference 7 270 30 00 23 4

Type KBM 50 Q

Input Watts 1200

Output Watts 680

Speed, full load R.P.M. 260/520/min

Current type 1~

Protection class l

Cable length with plug m 4

Net weight kg 12

Capacity in steel max. Ø, core drill mm 12-50

Capacity in steel max. Ø, spiral drill (with drill chuck) mm 16

Threaded drill M 16

Tool holder on drill shaft Quick IN

Magnetic holding power N 11000

Drilling depth max. with core drill mm 50

Height (drill jigs) mm 368

Stroke (adjustable) mm 135-310

Magnetic foot dimension mm 180 90

MVK 03 / 07

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Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

2. Maintenance

Please make sure that electric tools are repaired, serviced and tested by

specialists only as repairs carried out in an inexpert manner may cause

considerable hazards for the user (BGV A2).

Repeated tests are to be performed in accordance with DIN VDE 0702-1.

The regulations in accordance with DIN VDE 0701 Part 1 are to be observed after

any repairs.

Withstand voltage at 1000 V (Protection class 1)

Use original FEIN spare parts only!

During commissioning, while working and during maintenance of the core drilling

unit, applicable national accident prevention requirements of the professional

organization must be observed.

The law governing technical working equipment (Device Safety Law) applies in

terms of proper use.

MVK 03 / 07

Alle Rechte bei FEIN, insbesondere für den Fall der Schutzrechtsanmeldung.

Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

2.1. General Maintenance Tasks

Check the power cord (900) for areas of damage.

Blow out the motor with dry compressed air.

Check the carbon brushes (2.2.).

Small functional test (3.1.).

2.1.1. Maintenance intervals:

Depending on the nature and duration of use, no later than after 6 months:

- Clean the drill motor.

- Brush or blow out the brush holder and insulating parts.

2.2. Replacing the carbon brushes:

The drill motor is equipped with carbon brushes that shut off automatically.After the

minimum length of the carbon brushes has been reached, the power supply is

interrupted. If this happens, the carbon brushes must be replaced by an electrical

specialist. If you are using new carbon brushes, make certain to check that they move

easily inside the brush holder.Allow new carbon brushes to run for 15 minutes without

load. Use only

original FEIN carbon brushes!

MVK 03 / 07

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Fein Repair Tool

3. Electrical / Functional Tests

3.1. Minor functional test

3.2. Major functional test

3.3. Test data

3.4. Test devices and auxiliary materials

3.5. Wiring diagram

3.6. Safety test

3.7. Functional test

MVK 03 / 07

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Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

3.1. Minor functional test

3.1.1. Self-start lock and magnetic foot

Turn on the master switch and the motor switch. Then connect the core drilling

machine to the electrical power.

The motor must not start up.

The magnetic foot is energized.

Check the power consumption (0.4 A, see 3.3. Test data).

Motor switch off.

Magnetic foot remains energized.

Power consumption must be reduced to one half (0.2 A, see 3.3. Test data).

3.1.2. Motor

Motor switch on.

Motor starts up.

3.1.3. Characteristic curve of the motor

Place the motor under load.

Speed is regulated.

From about 1600 Watts on the speed drops off more sharply.

3.1.4. Overload switch off

Place the motor under heavy load.

The motor switches off after 10 seconds.

The motor must be run at idle for about 60 seconds before the test.

MVK 03 / 07

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Jede Verfügungsbefugnis wie Kopieren und Weitergaberecht liegt bei FEIN.

Fein Repair Tool

Possible causes Test possibilities

Magnetic foot does not

energize:



Check with

magnetisable part

power cable disconnected,

switch off,

connector not plugged in



LED on board must light up

briefly while switching on.



check power voltage on

X1, X2 continuity

magnetic foot defective 

LED on board is flashing



measure resistance (504Ω±5%)

elektronics defective 

LED on board is flashing



measure voltage on X7.1 and

X7.2 .

Magnetic holding force

too weak: do not turn on while testing

motor switch 

measure the voltage on X7.1

and X7.2



measure the magnetic foot defective 

measure resistance (504Ω±5%)

removal force

required standing surface uneven 

visual inspection

elektronics defective 

measure the voltage on X7.1

and X7.2

3.2.1. Major functional test

Note: If the magnetic foot is defective, no further tests are possible.

Because of magnetic foot monitoring, the motor cannot be turned on.

Connect the spare magnetic foot.

MVK 03 / 07

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Fein Repair Tool

3.2.2. Major functional test

Possible causes Test possibilities

Motor does not start up:

Switching sequence not

maintained 

Turn master switch on first, then

motor switch

Power cord disconnected,

switch off, connector not

plugged in



LED on board must light up

briefly while turning on.



Test mains voltage on X1, X2



Test continuity

Magnetic foot defective 

LED on board flashes



Measure resistance (504 Ω

±5%)

Error in motor power supply

line 

Test continuity

Motor switch defective 

Test

Carbon brushes worn out 

Visual inspection

Motor defective 

Test motor without electronics

(at max 145 V AC, see 3.3)

Measure idle speed

The reasons listed here

all cause the automatic

startup disable to

engage

Electronics defective 

If motor is defective, connect

replacement motor to X5, X6

and connect cable from speed

recorder to X8. Measure idle

speed or voltage

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