KERN DB 1700 N User manual

Operation manual
DB 1700 N
Operating Instructions……............... 1- 10

2
Operating Instructions
Important Instructions
Warning notices:
Warning of general danger
Warning of dangerous voltage
Warning of hot surface
Danger of being crushed
Danger of being ripped or cut
During work you should wear goggles, ear protectors, protective gloves, and sturdy work clothes!
Use ear protection
Wear safety goggles
Wear a helmet
Use protective gloves
Wear protective boots
Specifications
Diamond Core Drill DB 1700 N
Nominal voltage 110 V AC
Power drain 1.700 W
Order No.
Frequency: 40-60 Hz
Max. drilling diameter: 132 mm
Bit holder: M 18
Protection class: II
Degree of protection: IP 20
Weight: approx. 6.8 kg
Interference suppression acc.to: EN 55014 and EN 61000
Gear No load speed Rated speed Max. drilling diameter
I 0-1050 rpm 0-800 rpm 132 mm
II 0-21000 rpm 0-1570 rpm 70 mm

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Supply
Diamond core drill with cable-integrated cable PRCD protective switch, wet-type connector with ball valve and
GARDENA connector and instruction manual in transport case.
Application for Indented Purpose
The diamond core drill DB 1700 N is indented only for professional use and may be used only by instructed
personnel.
It may be used either with or without a suitable diamond drill rig. For wet drilling jobs with diameters above 80 mm
and drilling in the 1st gear, it is a must to use a suitable drill rig.
Drilling in the 1st gear without drill rig is prohibited! On careless use, counter torques may cause danger to
the user!
Safety Instructions
Safe use of the tool is only possible if the user had
studied the instruction manual and safety instructions
completely and is strictly following the instructions
contained therein.
Additionally, the general safety instructions of the leaflet
supplied with the tool must be observed. Prior to the first
use, the user should absolve a practical training.
If the mains cable gets damaged or cut during the use, do not
touch it, but instantly pull the plug out of the socket. Never use
the tool with damaged mains cable.
Prior to drilling in walls and ceilings, check them for hidden
cables, gas and water pipes and other media.
Check the working area, e.g. using a metal detector.
Prior to the start of your work, consult a statics specialist to
determine the exact drilling position.
If drilling through ceilings, secure the place below, because
the may fall downward.
The tool must neither be wet nor used in humid environment.
Do not use the tool in an environment with danger of explosion.
Do not use the tool standing on a ladder.
Do not drill into asbestos-containing materials.
Do not carry the tool at its cable, and always check the tool, cable and plug before use. Have damages only
repaired by specialists. Insert the plug into the socket only when the tool switch is off.
Modifications of the tool are prohibited.
Unplug the tool and make sure that the switch is off if the tool is not under supervision, e.g. during preparation
and take-down works, at power failures, for insertion or mounting accessories.
Unplug the tool if is stops for any reason. So you avoid sudden starts in unattended condition.
Do not use the tool it its shell, switch, cable or plug are damaged.
Always lead the mains and extension cables as well as the dedusting hose from the tool to the back.
Electrical tools have to be inspected visually by a specialist in regular intervals.
On using the tool, in no case cooling water may seep into the motor or the electric components.
If water comes out of the drainage hole at the gear neck, stop your work and have the tool repaired by an
authorised service centre.
Perform overhead drilling only with suitable protective appliances (water catcher).
After interruption of your work, restart the tool only after having made sure that the drill bit is moving freely.
The tool may be used only in two-hand operation or with the drill rig.
Keep the handles dry, clean, and free of oil and grease.
Do not touch rotating parts.
Persons under 16 years are not allowed to use the tool.
During use, the user and other persons standing nearby have to wear suitable goggles, helmets, ear
protectors, dust mask, protective cloves and boots.

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During manual operation, always hold the tool with both hands and be fall-safe. Consider the tool’s
reaction torque in case of blocking.
Always work with concentration. Always work in a carefully considered way and do not use the tool if
you are lacking consideration.
For further safety instructions, see the enclosure.
The DB 1700 N is designed according to protective class II. For the user’s safety, the tool may be operated only
with a leakage current protector. That is why the tool includes an integrated PRCD protective switch in an earth
contact socket.
!Attention!
The PRCD protective switch must not lay in water.
PRCD protective switches must not be used to switch the
tool on and off.
Before starting your work, check the proper function by
pressing the TEST button
Use only three-conductor cable with earth conductor and sufficient cross section (ref. to table). Too small a cross
section may cause malfunction of the tool.
Recommended minimum cross sections and maximum cable lengths
Mains voltage Cross section in sq. mm
1.5 2.5
110V 20 m 40 m
Prior to putting the tool into operation, check the mains voltage for conformity with the requirements of the tool’s
nameplate.
Voltage variations between + 6 % and – 10 % are permissible.
The tool includes a start-up speed limiter to prevent fast expulsion fuses from unindented responding.
Additional Handle
For manual drilling, the DB 1700 N may be used only together with its additional handle which comes with the
tools. Place it on the gearing collar from the front and fix it by counterclockwise rotation.
Switching ON and OFF
Short-time operation
ON: Press the ON/OFF switch
OFF: Release the ON/OFF switch
Long-time operation
ON: Keeping the ON/Of switch pressed, push in the arrestor button.
OFF: Press and release the ON/OFF switch again.
Electrical Connection

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!Attention!
Use the arrestor button only during operation with drill rig.
Its use during manual operation is not allowed.
If the machine stops for any reason or due to power failure,
immediately release the arrestor button by pressing the
ON/OFF switch.
If this button is not released, the tool may unintendedly
restart if the PRCD protective switch is operated and cause a
danger to the user.
Changing Gears
Choose the proper speed according to the drill bit size used.
Select at the speed selector by pressing-in, shifting and engaging.
If the selector is on “o” position, the speed can vary from 0 to 800 rpm.
If the selector is on “oo” position, the speed can vary from 0 to 1570 rpm.
CAUTION: - always check the drill bit manufactures recommendation
for use
- gear shifting only when the machine is stopped and
clockwise
Manual Drilling
For wet drilling, we recommend the use of a dimpling aid with water removal (order No. 35847).
This type is a must for overhead drilling.
Insert the gas spring with the water collecting ring
and the guide ring appropriate for the drill bit
diameter into the tension disk. Shift the gas spring up
to complete coverage of the bit segments by the
water collecting ring. Tighten the wing screw.
On drilling overhead, make sure that the water
supply is opened only after having switch the water
remover on and the removing unit was fixed to the
wall or ceiling.
Open the ball valve and switch the tool on.
Hold the tool tight with both hands. Locate the tool slightly inclined. Once the drill bit is in the material (approx. 1/8
to 1/4 of the circumference), bring the tool into an angle of 90 degrees and continue drilling.
Take care that the drill bit is not out of line.
Advance the tool according to bit diameter and machine power. Observe the LED in the handle.
If it lights red, reduce your pressing force.
In case the bit gets jammed, to not dry to release it by switching the tool on and off. This would cause premature
wearing of the safety clutch. Switch the tool off immediately and unfix the drill bit by turning to the left or right using
an appropriate open-end wrench. Cautiously pull the tool out of the borehole.

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Overload Protection
To protect the user, motor and drill bit, the DB 1700 N is equipped with a mechanical, electrical and thermal
overload protection.
Mechanical: In case of sudden jamming of the drill bit, the drilling spindle is unclutched from the motor by
means of a slip clutch.
Electrical: To warn the user against overstressing the tool by applying to high an advance force, the handle
includes a LED. It does not light during idle run or at normal load. At overload, it lights red. In that
case the tool most be stress-relieved. In case of longer non-observation of the rad indication, the
electronics will independently switch the tool off. After relieving is switching the tool off and on, the
work can be continued as normal.
Thermal: In case of permanent overload, a thermocouple protects the motor against destruction. In that case,
the tool switches off and can only be restarted after a certain cooling-down period (approx. 2
minutes). The cooling-down time depends on the temperature of the motor winding and ambient
temperature.
Safety Clutch
The slip clutch served for compensation of shocks and overload.
To keep its functionability, it should not slip for more than 2 seconds. In case of excessive wearing, it can be
replaced by an authorized service centre.
Drill Bits
Use only appropriate drill bits for the material to be drilled in. You can protect your tool by using only well balanced
drill bits without deformation.
Make sure that the diamond segments have sufficient cutting clearance towards the bit body.
Changing Drill Bits
Attention!
When you use or sharpen the machine, it might heat up enormously. You could burn your hands or get cut
or ripped by the segments. Therefore, always use protective gloves when changing the drill bit.
The drilling spindle has a right-hand thread.
To ease screwing on and off, always use a SW 32 open-end wrench at the drilling spindle.
Never use a hammer, because this may damage both the drill bit and the tool.
Some water-resistant grease on the drilling spindle threat or a copper ring between spindle and drill bit will
simplify removal of the drill bit.
Attention!
The bits may have got hot due to use or sharpening. There is a danger of burning ones hands or injuring oneself at
the segments’ edges.
When changing the drill bits, you should always wear protective gloves.

7
Care and Maintenance
Before the beginning of the maintenance- or repair works
you have to disconnect plug from the mains.
It is a must to unplug the tool before starting any service or repair works.
Repairs may be executed only by appropriately qualified and experienced personnel.
After every repair, the unit has to be checked by an electrical specialist.
According to its design, the tool requires a minimum of care and maintenance. However, the following maintenance
works and component checks have to be performed in regular intervals:
Clean the tool after completion of your work. Apply some grease onto the drilling spindle thread. The ventilation
slots must always be clean and unclogged. Make sure that now water gets into the tool during cleaning.
After the first 150 hours of operation, the gearing oil must be changed.
Gearing oil changes bring about an essential increase of the tool’s lifetime.
After approx. 250 hours of operation, the carbon brushes must be checked and, if necessary, be replaced by
an authorized specialist (use only original carbon brushes).
Once per quarter of a year, an electrical specialist should check the switch, cable and plug.
Environmental Protection
Raw material recycling instead of waste disposal
To avoid damages in transit, the tool is supplied in a sturdy packing. The packing as well as the tool and its
accessories are made of recyclable materials which enable environmentally friendly and sortwise disposal by the
local reception points.
Only for EU countries
Do not dispose of electric tools together with household
waste material!
In observance of European Directive 2002/96/EC on waste
electrical and electronic equipment and its implementation
in accordance with national law, electric tools that have
reached the end of their life must be collected separately
and returned to an environmentally compatible recycling
facility.
Noise Emission
The indication of noise emission is measured after DIN 45 635, part 21. The level of acoustic pressure on work site
could exceed 85 dB (A); in this case protection means must be used.
Wear ear protectors!
Hand-arm vibration :

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Measured values determined according to EN 60 745.
Vibration emission value ah 3,3 m/s2
Uncertainty K 0,5 m/s2
The declared vibration emission level represents the main applications of the tool. However if the tool is used for
different applications, with different accessories or poorly maintained, the vibration emission may differ. This may
significantly increase the exposure level over the total working period.
An estimation of the level of exposure to vibration should also take into account the times when the tool is switched
off or when it is running but not actually doing the job. This may significantly reduce the exposure level over the
total working period.
Identify additional safety measures to protect the operator from the effects of vibration such as: maintain the tool
and the accessories, keep the hands warm, organisation of work patterns.
Warranty
According to the general supply conditions for business dealings, suppliers have to provide to companies a
warranty period of 12 months for redhibitory defects. (To be documented by invoice or delivery note).
Damage due to natural wear, overstressing or improper handling are excluded from this warranty.
Damages due to material defects or production faults shall be eliminated free of charge by either repair or
replacement.
Complaints will be accepted only if the tool was returned in non-dismantled condition to the manufacturer or an
authorized Eibenstock service centre.
Declaration of Conformity
On sole responsibility we declare that this product is in conformity with the following standards and standard
documents:
EN 60 745, EN 55 014, EN 61 000,
according to the regulations 2006/95/EC, 89/336/EEC, 98/37/EC
Your Distributor:
KERN-DEUDIAM GmbH
Industriestr. 24
33161 Hövelhof
Germany
Tel: +49 5257 – 507 - 0
Fax: +49 5257 – 507 - 40
www.kern-deudiam.de
[email protected]