DR. BENDER DX 5 L User manual

DR. BENDER GmbH
Innovative Elektrowerkzeuge
Manual for
drilling motor DX 5 L
400 V
Valid from 05.2016 Art.-Nr. 201055 Subject to alteration
All rights reserved
DR. BENDER GmbH • D-75382 Althengstett • Tel [phone] • Fax [phone]
Our website address is: http://www.dr-bender.de• eMail: [e-mail]

2
Conformity Declaration
DR.BENDER GmbH
Innovative Elektrowerkzeuge
EC declaration of conformity (EG-RL 2006/42/EG)
Hereby the manufacturer
Dr. Bender GmbH
Industriestrasse 22
75382 Althengstett
declares for the product
DX 5L
The named product is conform to the following Council Directives on approximation of laws of the EEC
Member States:
-Council Directive for machinery (2006/42/EC)
-Council Directive for Electromagnetic compatibility (EMC) (2004/108/EG)
-Low Voltage Guide Lines (2006/95/EG)
Conformity with the requirements of this Directives is testified by complete adherence to the following stan-
dards:
EN 50144-1
EN 50144-2-1
EN 55014-1
EN 61000-3-2
EN 61000-3-3
EN 55014-2
EN 61029-1
The instructions contained in the operating manual for installation and start up the machine have to be fol-
lowed.
Authorised Person for Documentation:
Min Wei
c/o Dr. Bender GmbH
Industriestrasse 22
75382 Althengstett
Deutschland
DR.BENDER GmbH Althengstett, 30.07.2018
Industriestraße 22
D-75382 Althengstett
Tel. [phone], Fax [phone]
Min Wei, Managing Director
This Declaration does not include Assurance of Product Properties.
The Safety Instructions of the enclosed Product Documentation have to be respected.

3
Contents
page
Conformity declaration 2
Contents 3
1.0 Symbol- and Pictograph description 4
1.1 Function description 4
2.0 General instructions 5
2.1 Application 5
2.2 Safety 5
3.0 Transport and storage 6
3.1 Transport 6
3.2 Storage 6
4.0 Main dimensions and technical data 7
4.1 Dimensions 7
4.2 Technical data 7
4.3 Noise emissions and vibrations [EN 50144] 8
5.0 Commissioning 8
5.1 Changing gear 9
5.2 Safety coupling 9
5.3 Core bits 9
5.4 To change a core bit 9
6.0 Safety instructions 10
7.0 Servicing and care 11
7.1 Daily care 11
7.2 After approx. 150 hours of use 11
7.3 Quarterly 11
8.0 Speed adjustment dependent on the cutting speed 12
9.0 Warranty 13
10.0 General safety instructions 13
11.0 Spare parts list 14
11.1 Stone drilling machine complete 14
11.2 Motor complete 16
11.3 Gear complete 18
11.4 Connection cables and accessories 20

4
Warning
The safety instructions set out in this operating manual must be followed at all
costs.
Special designs and versions may differ from the standard models in terms of their technical details. If any
points are unclear, we urgently recommend that you contact DR.BENDER GmbH, indicating the machine
type and machine number.
1.0 Symbol- and Pictograph description
This sign tells you rules, if you not pay attention for this your health and the function of
the machine is in danger. You have no warranty if the machine breaks down because
you not looking about this.
1.1 Function description
Handle
Water connection
Gear control
Switch on/off
Drill-spindle

5
2.0 General instructions
2.1 Application
The core drills can be used for the purposes outlined by the data on the model plate. If you are using spe-
cial machines, the details in the quotation and order confirmation also apply.
The core drills are supplied as standard in protection class I, only this can guarantee the full high quality
production of the residual current-operated circuit-breaker or PRCD switch.
If you use suitable core bits, you will be able to drill holes in the most diverse material types:
- Concrete (even if it contains thick reinforcement steel)
- Sandstone and limestone
- All building materials for solid walls
- Asphalt floors
The core drills comply with the regulations issued by the ”Stone and Earth” Professional Association issued
in July 1989. They are machines of category II, which means that they must be placed on stands and be
stable (pursuant to DIN 57100 or VDE 0100), the stand must be equipped with
- a reversing block, and
- a water suction device.
The machine must be connected to the 230 V mains
- direct using a personal safety switch (residual current-operated circuit-breaker or PRCD), or
- using a coded (1h) plug to a safety box (IP 44) with a residual current-operated circuit-breaker.
2.2 Safety
Warning
Before using the machine for the first time, check that the conformity of the data
on the model plate with the mains voltage and frequency. Voltage deviations of ±
5 % and/or voltage deviations of ± 2 % are permissible. Repairs must only be
completed by quality persons who have suitable training and qualifications.
The following points are to be given special attention:
- the technical data and details of the permitted use of the machine (commissioning, ambient and
operating conditions) which are set out in the catalogue, the operating manual, the model plate
data and other product information,
- the relevant accident prevention regulations
- the correct use of tools
- the use of personal safety equipment

6
3.0 Transport and storage
3.1 Transport
Warning
The core drills are to be checked for signs for transport damage on receipt. Any
damage must be documented in writing.
3.2 Storage
If possible, the storage site should be dry, clean and have a constant temperature. To ensure that the film
of lubricant in the bearings and sealing system is not lost, the motor shaft should be turned through several
revolutions by hand after a lengthy period of storage, for example at monthly intervals. The roller bearings
in the motors should be replaced (or regreased) if the period between delivery and commissioning is over
four years. If the machines are stored in adverse conditions, this period may differ considerably.

7
4.0 Main dimensions and technical data
4.1 Dimensions
4.2 Technical data
Rated Voltage 400 V
Current consumption 9 A
Power requirement 5200 W
Frequency 50 – 60 Hz
Idling speed 120 / 280 / 440 min
-1
Full speed 120 / 280 / 440 min
-1
Output rating 3700 W
Torque 320 / 165 / 95 Nm
Drilling diameter 500 / 250 / 100 mm
Degree of protection IP 56 -
Cooling medium Water -
Weight 22,5 kg
Core bit connection UNC 1 ¼ “
Overload coupling torque 320 Nm

8
4.3 Noise emissions and vibrations [EN 50144]
Noise level Noise level Vibration
dB(A) dB m/s
2
73 85 < 2,5
5.0 Commisioning
Check that the mains voltage is identical to the voltage specified on the model plate.
Secure the core drill and the water collector to the drilling stand with its reverse block. The drilling stand
should be as rigid as possible and have precise, low-play guides. Ensure that the core drill axis is parallel
to the axis of the drilling stand.
Insert the core bit and set the speed. The setting instructions are on page 12.
Connect the water supply. Important: Do not exceed the maximum water pressure of 3 bar.
Connect the core drill to the mains using a residual current-operated circuit-breaker box and 6 h coded
CEE plug. Only use three-core extension cables with a protective conductor and an adequate cross-
section. If the cross-section is too low, you may lose excessive power and result in the motor and cable
overheating. An extension cable must have an overload cut-out switch. Recommended cable cross-
sections:
Rated current = 9 A
Cable length m 7,5 15 25 30 45 60
Cable cross-section mm
2
2,5 2,5 2,5 2,5 2,5 4
The drilling motor is water-cooled. Look after sufficient cooling water when drilling therefore. The drilling
motor must be operated during the full load with at least 1 liters of water per minute. Use only pure tapwa-
ter, no dirt or sewage, otherwise the drilling motor will damaged. Adjust the feed speed to the core bit di-
ameter and the drive rating of the core drill so that the rated current is not exceeded.

9
5.1 Changing gear
Warning
Never change gear using force and only do so when the machine is slowing
down or at a standstill.
To change into the next higher or lower gear, move the gear-change lever through an angle of approx. 50°.
If necessary (if the gear is difficult to engage), turn the drive spindle briefly by hand until the gear engages
easily. Do not use any tools (pliers, hammer, etc.) to change gear since otherwise gear damage is a natural
con-sequence.
5.2 Safety coupling
The values set out in the table are theoretical values and may be used to provide a rough guide for gear
changing. Since a whole range of other parameters also plays a major role in adjusting the speed, we can-
not offer any guarantee if the tool is damaged when using the values in the table. Drilling work for which the
speeds are outside the range of the core drill (values printed in italics), should only be completed with ex-
treme care and by trained personnel.
5.3 Core bits
All core bits with a connection thread of UNC 1 ¼ “ can be used.
Adapters can be supplied to allow core bits with other connection systems to be used.
Only use core bits that are suitable for the type of stone.
You will keep the core drill in good condition if you only use core bits that are concentric and not deformed
ones.
Ensure that the diamond segments have an adequate undercut against the core bit body.
Warning
To use wrong tools or accessories is danger for your life.
5.4 To change a core bit
The drill spindle has a right-handed thread.
Always use a 32 mm open-ended spanner to hold against the drill spindle.
Never release the core bit with (hammer) blows since this will damage the core drill.
The core bit can be removed more easily if you apply a little waterproof grease to the drill spindle thread.

10
6.0 Safety instructions
Important
Only use the core drill under supervision. Disconnect the mains plug and check
that the switch has been turned off,
- If you intend to leave the core drill unsupervised,
- For attachment and disconnection work,
- If the voltage drops (below 340 V),
- At uneven mains voltage (phase asymetrical) or interruption of a phase (phase failure),
- For adjustments or for fitting an accessory,
Switch off the machine if it stops for any reason. This will prevent its starting suddenly when it is not under
supervision.
Do not use the tool if
- Part of the casing is missing or defective,
- If water drips out of the overflow hole, stop work and have the core drill inspected by an author-
ised service contractor.
- After a fault do not switch on the machine again until the core bit can be turned easily.
- Check the area you wish to drill with a line detector to prevent drilling through electric cables, wa-
ter or gas lines, etc.
- The switch, lead or plug connector has suffered damage (conduct a visual inspection every day).
- Cooling water must not be allowed to ingress into the motor or the electrical components when
operating the core drill in any position.
Do not expose the tool to rain and use not in humidity or wet environment. Use a good lightning. Do not use
the tool near flammable fluids or gase air mixes.

11
7.0 Servicing and care
Warning
Before starting any servicing or repair work always disconnect the mains plug.
After all repairs you must have the core drilling machine inspected by an elec-
trician (statutory regulation pursuant to VBG4 since 1.1.1990).
7.1 Daily care
Ensure that no water is emitted from the overflow hole. This will cause gear damage and may adversely
affect the electrical safety of the core drill. If water is emitted, see assistance from an authorised service
outlet.
Visual inspection for damage to the switch, connection lead or plug connector.
After completing the drilling work clean the core drill. Grease the core bit mounting thread. The ventilation
slits must always be clean and open. Ensure that during the cleaning process, no water gets into the core
drill.
Empty the cooling water in the drilling motor after the use. Open to this the ball cock completely and let the
cooling water go off. This is particulary very important because of freezing education in the winter months.
To maintain the seal, oil the drilling spindle as follows
- Disconnect the core drill from the water supply. Open the water connector shut-off cock, add sev-
eral drops of oil, close the shut-off cock, add several drops of oil to the overflow hole and turn the
machine briefly by hand.
7.2 After approx. 150 hours of use
After the first 150 hours of use, the gearbox oil must be changed.
7.3 Quarterly
Have the cable, switch and plug connectors inspected by a specialist (regulation pursuant to VBG4) and
document this inspection. Changing the gearbox oil will produce a considerably increase in the service life
of the gear.

12
8.0 Speed adjustment dependent on the cutting speed
The values set out in the table are theoretical values and may be used to provide a rough guide for gear
changing. Since a whole range of other parameters also plays a major role in adjusting the speed, we can-
not offer any guarantee if the tool is damaged when using the values in the table. Drilling work for which the
speeds are outside the range of the core drill (values printed in italics), should only be completed with ex-
treme care and by trained personnel.
3
4
5
6
7
[m/s]
100
573
764 955 1146 1337 3rd gear
110
521
694
868 1042 1215 3rd gear
120
477
637
796 955 1114 3rd gear
130
440
588
735 881 1028 3rd gear
140
409
546
682 819 955 3rd gear
150
382
509
637 764 891 3rd gear
160
358
477
597
716 836 3rd gear
170
337
440
562
674 786 3rd gear
180
318
424
531
637 743 3rd gear
190
302
402
503
603
704 3rd gear
200
286
382
477
573
668 3rd gear
210
280
364
440
546
637 3rd gear
220
260
347
434
521
608
3rd gear
230
249
332
415
498
581
3rd gear
240
239
318
398
477
557
3rd gear
250
229
306
382
458
535
3rd gear
260
220
294
367
440
514
3rd gear
270
212
280
354
424
495
3rd gear
280
205
273
341
409
477
3rd gear
290
198
263
329
395
461
3rd gear
300
191
255
318
382
440
3rd gear
320
179
239
298
358
418
2 or 3
340
169
225
280
337
393
2 or 3
360
159
212
265
318
371
2 or 3
380
151
201
251
302
352
2 or 3
400
143
191
239
280
334
2 or 3
420
160
182
227
273
318
2 or 3
440
130
174
217
260
304
2 or 3
460
125
166
208
249
291
2 or 3
480
120
159
199
239
280
2nd gear
500 115
153
191
229
267
1 or 2
520
110
147
184
220
257
1 or 2
540
106
141
177
212
248
1 or 2
560
102
136
171
205
239
1 or 2
580
99
132
165
198
231
1st gear
600 95
120
159
191
223
1st gear
700
82 109
136
164
191
1st gear
800
72 95
120
143
167
1st gear
900
64 85 106
120
150
1st gear
Bit capacifityø
concrete
concrete
rock
[mm]
reinforced

13
9.0 Warranty
In keeping with our terms of sale, we offer a warranty for twelve months from the date of sale. This refers to
the free repair of material and workmanship defects, which were verifiably caused before the sale.
An original purchase document must always be submitted in case of a warranty claim. It has to contain the
full address of the dealer, the date of purchase and the type designation of the product. The operating in-
structions of the particular product and the safety instructions must have been followed.
Damages resulting from operational faults cannot be acknowledged as warranty cases.
The products of the manufacturer have been developed and produced for specific applications. No war-
ranty claim is accepted in case of non-compliance with the due employment according to the operating in-
structions, in case of the employment for other purposes than originally intended or the employment of in-
adequate accessories.
The periodical maintenance and cleaning of the products according to the directions of the operating in-
structions is absolutely necessary. The intervention of third persons (opening the machine) renders any
warranty claim void.
Maintenance and cleaning operations cannot be claimed on the basis of warranty.
Make sure only original spare parts and original accessories are used. They are available at the authorized
specialized product dealer. If non-original parts are used, consequential damages and increased hazard
cannot be ruled out. The producer is not liable for such damages. Disassembled or partially disassembled
hand saws and those repaired with non-original parts are excluded from the warranty.
Certain components, such as carbon brushes, ball bearings, switches, power-supply lines, gaskets, etc.,
are exposed to usage dependent or to normal wear. These wearing parts are not object of this warranty.
Wearing parts are marked on the spare parts lists.
10.0 General safety instructions
The general safety instructions can be found in the supplied safety instruction booklet.

14
11.0 Spare parts list
11.1 Stone drilling machine complete

15
Item Art. No. Description No.
1 201055 Stone drilling machine complete 1
2 301766 Motor complete 1
3 301764 Gear complete 1
4 802399 Water hose 1 **
Wearing parts**

16
11.2 Motor complete

17
Item Art. No. Description No.
1 301766 Motor complete 1
2 201222 Motor casing 1
3 802570 Stator 1
4 401462 Sealing sleeve 2
5 802104 O ring 4 **
6 301768 Rotor complete 1
7 900052 Grooved ball bearings 1 **
8 900601 Grooved ball bearings 1 **
9 301769 Flat sealing 2 **
10 201059 Intermediate cover 1
11 801368 Locking ring 1 **
12 900202 Locking ring 1 **
13 901031 Shaft seal 1 **
14 801345 Locking ring 1 **
15 900156 Needle sleeve 1 **
16 900680 Needle sleeve 2 **
17 800083 O ring 1 **
18 802106 Disc spring 2 **
19 201060 Stored cap 1
20 900231 Washer 1
21 900181 Wave spring washer 1
22 900412 Slotted pan head screw 1
23 802980 Water connection complete 1 **
24 802981 Hose complete 1
25 800028 Sealing ring 2
26 800023 Ball valve complete 1
27 800020 Nipple 1
28 800040 O ring 1
29 800027 Sealing ring 1
30 802673 Connection cable 1 **
31 802574 Switch complete 1
32 802572 Double push button 1
33 802573 Key protection 1
34 800149 Switch box literature 1 **
35 800167 Switch box cover 1
36 801386 Button head socket screw 4
37 800075 Locking washer 12
38 900331 Hexagon socket head cap screw 4
39 900327 Hexagon socket head cap screw 6
40 803074 Handle 1
41 901399 Hexagon socket head cap screw 2
42 802402 Thread nipple 1 **
Wearing parts**

18
11.3 Gear complete

19
Item Art. No. Description No.
1 301764 Gear complete 1
2 100080 Gear casing 1
3 900051 Grooved ball bearings 1 **
4 900495 Grooved ball bearings 1 **
5 900670 Interim washer 1
6 400795 Sleeve 1
7 900669 Axial needle rim 2 **
8 900672 Axial-thrust bearing disk 2
9 900671 Needle roller bearing 1 **
10 300670 Supporting disk 1
11 400011 Brake disk 2 **
12 401308 Floor wheel complete 1
13 301051 Floor wheel 1
14 400798 Bearing bush 1 **
15 400048 Gear change shaft complete 1
16 800097 O ring 1 **
17 400096 Switch handle complete 1
18 800075 Locking washer 1
19 900354 Hexagon socket head cap screw 1
20 900500 Sealing ring 1 **
21 900498 Screw plug 1
22 301934 Drill spindle complete 1
23 900110 Parallel key 1
24 400796 Pressure sleeve 1
25 300427 Pump wheel 1
26 301052 Pinion shaft 1
27 401310 Loose wheel 1 complete 1
28 301053 Loose wheel 1 1
29 400082 Bearing bush 1 **
30 400129 Shim ring 1
31 800080 Spring ring 1 **
32 900504 Parallel key 1
33 900014 Ball 2
34 800165 Pressure spring 1
35 301054 Change gear 1
36 900663 Disc spring 9
37 401965 Compensation slice 1
38 402009 Hexagonal nut 1
39 401311 Loose wheel 2 complete 1
40 301055 Loose wheel 2 1
41 400083 Bearing bush 2 1 **
42 900163 Shim ring 1
43 900209 Locking ring 1 **
44 900503 Shim ring 1
45 900681 Inside ring 2
46 300872 Reduction gear shaft 1
47 900127 Parallel key 1
48 300995 Counter gear 1
49 900674 Bush 1
50 801059 O ring 1 **
51 400797 Connection ring 1
52 800760 Locking ring 1 **
53 900673 Shaft seal 1 **
54 900027 Shaft seal 2 **
55 900675 Hexagon socket head cap screw 3
56 800092 O ring 1 **
57 802404 Thread nipple 1 **
58 801019 Gear lubricant oil 0,3l 1 **
Wearing parts**

20
11.4 Connection cables and accessories