REITEL ROTOGRIND NT User manual

Operating Instructions
LABORATORY EQUIPMENT
IN STAINLESS STEEL
ROTOGRIND NT
REITEL Feinwerktechnik GmbH
Senfdamm 20 | 49152 Bad Essen
Phone: [phone] | Fax: [phone]
www.reitel.com | [email protected]

II
Dear customer!
The powerful universal trimmer ROTOGRIND NT is used for wet and dry machining. The
water flow can be easily switched on the device. The disc rinsing keeps the disc clean and
handy even after dry operation. Simple cleaning is ensured by the shape of the housing and
by the front change system. For safety reasons, the ROTOGRIND NT is equipped with a disk
quick stop and restart protection. The large machining window gives you full access to your
selected diamond or corundum grinding disc. The laser-engraved angle markings on the
support table provide an additional model alignment aid. The angle of the table is infinitely
adjustable. In dry operation, it is extracted directly from the support table without the need for
conversion to the unit. The stainless steel design and high-quality components ensure a
long-lasting working with this model trimmer.
Any other use or usage beyond this scope is considered unintended use. The manufacturer
shall not be responsible for any damages that may result thereby. Prior to installation of the
device operating instructions and especially the safety instructions must be read and
followed by all personnel who use this device.
After having unpacked the device, please check carefully whether transportation damages of
any kind have occurred. If that is the case, the carrier or manufacturer must be notified within
3 days. The company will not be responsible for any damages found after that.
These operating instructions must be read and followed by all personnel who use this device.
To ensure quick access we recommend to keep it at a safe place near the device. In case of
loss it can be ordered from the manufacturer.

III
INDEX
TECHNICAL DESCRIPTION......................................................................................... 4
BASIC EQUIPMENT....................................................................................................... 4
SPECIAL ACCESSORIES................................................................................................ 4
DEVICE COMPONENTS.................................................................................................. 5
TECHNICAL DATA......................................................................................................... 8
SAFETY NOTES........................................................................................................... 9
GENERAL SAFETY NOTES ............................................................................................ 9
SPECIFIC SAFETY NOTES............................................................................................10
INSTALLATION...........................................................................................................11
INSTALLATION.............................................................................................................11
CHANGING A GRINDING DISC........................................................................................11
OPERATION................................................................................................................12
CHRONOLOGICAL RUN OF OPERATION..........................................................................12
CLEANING..................................................................................................................12
TROUBLESHOOTING .................................................................................................13
MAINTENANCE...........................................................................................................14
WARRANTY.................................................................................................................15
DISPOSAL REGULATIONS ........................................................................................18
SPARE PARTS LIST ...................................................................................................18
EG CONFORMITY DECLARATION.............................................................................19

4
Technical Description
Basic Equipment
•Wet- / dry trimmer ROTOGRIND NT
•Inlet hose, 150 cm
•Drain hose, 80 cm
•Allen® key, size 6
•Allen® key, size 2
Special Accessories
•Order-No.: 20306000 LED-working lamp
•Order-No.: 20308000 Laser guide for model alignment
•Order-No.: 20301000 Grinding disc silicon carbid
•Order-No.: 20302000 Diamond disc, fully coated „medium“
•Order-No.: 20303000 Diamond disc, fully coated „rough“
•Order-No.: 23401000 Diamond disc „DELTA“, partially coated, triangle segmented
•Order-No.: 23301000 Diamond disc „PW“, partially coated, mounted points
•Order-No.: 27902000 Extraction DUSTY COMFORT
•Order-No.: 20305000 KFO-Angulation table (Conversion for grinding disc Ø 280 mm)

5
Device components
1 Front
2 Grinding disc
3 Tray table
4 Adjusting spindle for tray table
5 Extraction hose for dry trimming
6 Quick release (secured with Allen® screw before first use)
7 Drain hose for wet trimming
8 Appliance outlet for extraction
9 Power supply
10 Main switch
11 Ball valve with black handle to regulate the amount of water
12 Switch for dry or wet trimming
13 Overload protection
14 Locking bolt
15 Disc rinsing tube, small
16 Rubber seal
17 Central screw for removing grinding disc
18 Disc rinsing tube, large
19 Water supply

6
Fig.: Front view
Fig.: Lateral view
Fig.: Lateral view
1
6
3
2
7
4
5
11
8
14
13
9
12
10

7
Fig.: Grinding disc
Fig.: Rear view
17
18
16
15
19

8
Technical Data
Line voltage
230 V/50-60 Hz
Current consumption
1.500 W
Height / Width / Depth
350/350/470 mm
Floor area (W/D)
200/250 mm
Weight
22 kg
Speed
3.000 rpm
Grinding disc diameter
250 mm
Sound level
≤70 dB(A)
Housing
Stainless steel
Order-No.:
10301000
Made in Germany (Subject to modifications)

9
Safety Notes
General Safety Notes
•All equipment undergoes final inspection and testing before leaving our factory. However,
if equipment is damaged during shipping or through any other circumstances, it must not
be used in service. Please check the device regularly for damages. Damaged parts
should be replaced immediately.
•All power / air / water / gas sources should be rated for the demands of the device as
listed in the technical data sheets. Maximum ratings must not be exceeded. All VDE
(Verein Deutscher Elektro-Ingenieure) standards should be followed. Equipment should
be grounded according to standards.
•Adherence to valid regulations regarding necessary checks (e.g. according to Accident
Prevention & Insurance or electrical equipment) is exclusively taken over by the
buyer/user of this product.
•This device has been designated to be used only for its intended purpose. All other
applications must be prohibited for safety reasons as otherwise the manufacturer’s
warranty expires.
•The device may only be used by persons who have been instructed in the handling and
are expressly commissioned with the operation.
•The device should be set-up in a clean, well-ventilated room, if necessary under a hood.
•Supporting surfaces should be straight, flat and adequately stable.
•No objects may be placed on the device.
•To avoid injury, appropriate protection should be worn (as gloves, safety glasses, safety
shoes, hearing protection etc.)
•If the machine is defective or working improperly it must be taken out of service. In case
of further use of the machine the owner will be held responsible for any consequential
damage.
•To prevent accidents from water, fire or explosion, all power/air/water/gas sources should
be turned off after working hours and during breaks, and secured against unauthorized
access.
•When carrying out maintenance works or repairs or when opening the device always turn
off the main power switch and unplug the whole unit.
•Repairs should be carried out only by the manufacturer or by qualified and certified
personnel appointed according to chapter 7 –warranty.
•In case of leaking water out of housing or tank shut down device and call service.
•Check all hose connections for leak tightness, if necessary tighten hose clamps again

10
Specific Safety Notes
Note:
•Before opening the device, remove the locking screw (Allen® key)
on the quick release (6).
•Only use the ROTOGRIND NT with grinding discs, Ø 250 mm. The exception is the
orthodontic front, which is used with a grinding disc, Ø 280 mm. Smaller discs are not
allowed and increase the risk of injury
•Investment material and dry hard plaster reduce the grinding disc’s service time. The
diamond grinding discs may not be used for metal and quartzide material. The
diamonds will start to melt immediately and the grinding disc is rendered unusable.
•The ROTOGRIND NT includes a wet-rinsing, cleaning the grinding disc. When working
with material containing components which are not meant to be put into the public
wastewater disposal, suitable cleaning systems have to be used or the wastewater has
to be collected and disposed of separately.
•The ROTOGRIND NT is a benchtop unit. Supporting surfaces should be straight, flat and
adequately stable.
•When opening the machine’s front, please keep in mind that the grinding disc doesn’t
stop immediately after the machine has been turned off. Wait till it has stopped
completely.
•Always use a wedging block when working on smaller pieces.
•Put the working piece on the model tray first and then press it towards the grinding disc.
•Never put your hands into the running device.
•Only turn on the machine again when the grinding disc is still at a halt.
•Don’t use worn or damaged grinding discs.
•Only change the grinding disc when it stands still and the whole unit is unplugged.
•Only use original REITEL grinding discs –with an outer diameter of 250 mm. Using
grinding discs supplied by other manufacturers will render our warranty null and void with
immediate effect.
•Always respect the regulations of the grinding discs manufacturer (e.g. max. speed,
sense of rotation, cutting speed, material to be worked on).
•Keep the housing clean and dry.

11
Installation
The electrical equipment is ready for immediate use. The sealed plug can be connected
directly to the mains supply 230 V/16 A. For installation please refer to safety notes in
chapter 2.
Installation
1. Attach supplied hose to water inlet (19) fastening it with the hose clamp included in
delivery. Fix the other end of the hose to your water tap.
2. Fix the drainage hose to the water outlet (6). Lead wastewater via drain hose with a fall to
the plaster-settling basin (respect local regulations).
3. Connect the machine to the power supply.
4. For dry trimming, connect the extraction unit to the extraction hose (5) and plug the
suction plug into the socket (8) on the trimmer.
5. Before putting the device into operation, remove the locking screw from the quick
release.
Changing a grinding disc
1. Turn off power switch (10). Pull the mains cable (9) from the socket.
2. Wait until the grinding disc has completely stopped.
3. Remove the security screws and open the quick releases (6), hinge the front (1) aside.
4. Release the central nut (17) holding the disc by using the Allen® key (see chapter 1.1)
counter-clockwise. Take off the central nut and remove the disc.
5. Clean the disc’s working surface and supporting disc, put on supporting disc and new
grinding disc and ensure that it’s placed correctly and then fix the screw in a clockwise
direction.
6. Reinsert the front with the quick release (6).

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Operation
Chronological run of operation
1. Select the type of grinding with the switch (12):
−dry grinding (switch position "cloud")
−wet grinding (switch position "water tap")
2. Adjust the inclination angle of the tray table (3) with the support adjustment screw (4).
Secure with the locknut. Turn on the main switch (10).
3. The water supply can be regulated by the ball valve with black handle (11) (right side of
the device) (lever horizontal →tap open, lever vertical →tap closed). Each position in
between regulates the amount of water.
4. Put the model to be worked on the tray table (3) and press it against the rotating disc (2).
It’s prohibited to use the trimmer with inadmissible material.
5. Turn off the device after the operation. The disc slows down after a short time.
6. When switching on again, excess water is automatically removed on the grinding disc.
This allows immediate dry grinding.
Cleaning
1. Turn power switch (10) off.
2. Pull power plug (9) from socket.
3. Wait until the grinding disc has stopped completely.
4. Open the quick release (6) and release the locking bolt on the hinge (14). Pull the locking
pin on the hinge out of the guide and remove the front (1) towards yourself.
5. Clean the front under running water. Clean the inside with a damp cloth.
6. Clean the rubber gasket. Replace the front (1) and secure it to the device with the locking
pin (14). Tighten the locking pin on the hinge (14) and lock the front (1) with the quick
release (6).

13
Troubleshooting
Device doesn’t turn on.
a. Power failure →Check fuses in the
building. Switch the device on again.
b. Check safety switch by opening and
closing the front (pin on housing
initiates switching operation).
Abrasive power diminishes.
a. Replace worn or defective grinding
discs.
b. Clean dirty grinding discs (e.g. with
steam cleaner).
c. Investment material and dry hard
plaster reduce the grinding disc’s
service time.
d. Check water cleaning, flushing hole
may be blocked, too little water.
Machine is untight.
a. Check correct fitting of the front cover
(1).
b. Clean the sealing behind the front,
maybe grease sealing with vaseline.
c. Replace sealing.
Grinding wheel does not turn.
a. In case of blockage, main switch off and
after 5 min. press the device fuse.
b. Central screw is not tightened or does
not tension the disc (grinding wheel too
thin –third-party product) →Use
spacer.
Water flow disturbed.
a. The drain hose should have a slight
slope to the settling tank.
b. Drain hose blocked, remedy blockage.
Odor nuisance during operation.
a. Brake grinds →inform service.
b. Too frequent switching on and off leads
to smell of the brakes.
Vibrations during grinding.
a. Grind the bearing surface smooth first.
b. Check the axial impact of the grinding
disc.
Device moves on the table.
a. Disc is unbalanced →replace.
b. Disc surface soiled →clean.
c. Place the device on a vibration-free
surface.

14
Maintenance
•Regularly check the appliance for visible damage to the housing or power cord.
•Clean the front and inner grinding area once a week (see chapter 4.2 cleaning).
Note
Clean and protect your device at regular intervals with the REITEL stainless steel care
spray (order -no.: 90405000) to remove lime, plaster and dust as well as other
contaminants from the surface of the equipment and to prevent corrosion. The spray
creates a lasting, water repellent protective film which helps keep the equipment clean.

15
Warranty
We, REITEL Feinwerktechnik GmbH, offer a 1 year’s warranty beginning from the proven
date of purchase. This warranty covers all defects traceable to materials, design or
workmanship. The following warranty regulations are applicable:
Within the warranty period Reitel Feinwerktechnik GmbH or an authorized distributor agrees
at its sole option, to perform repair or replace this product at no charge covering all defects
traceable to materials, design or workmanship. Warranty only applies to appropriate use and
regular maintenance of this product according to the operating instructions. Claims under
warranty are restricted to complementary performance. Additional claims, especially claims
for indemnifications, are not covered by this warranty.
1.
Warranty claims have to be addressed to the distributor the product was purchased from or
directly to our service department.
Contact:
REITEL Feinwerktechnik GmbH
Senfdamm 20
49152 Bad Essen
Germany
Phone: [phone] (Service Department)
Phone: [phone] (Reception)
Fax-No: [phone]
2.
In case of warranty claim application the sales receipt or your purchase invoice showing the
date of purchase of the product and the serial number must be furnished. Securely pack and
ship the device, freight charges prepaid, at your own risk to us, along with a report describing
the defect. We reserve the right to decline warranty if this information has been removed or
modified after purchase of the product or if they are not included in case of warranty claims.
3.
Warranty repairs have to performed by REITEL Feinwerktechnik GmbH or by authorised
distributors. Repairs performed by non-authorised companies will void the claim for refund
since damages to the product resulting hereof are not covered by warranty.
4.

16
If the unit sent in for repair or replacement is still under the original warranty then warranty is
to the end of the original 1 year warranty.
5.
If the unit is destined to be operated in another country than originally intended and
manufactured for, modifications to the product might be necessary to comply to special
technical and /or safety standards of that specific country. Such modifications are no defects
traceable to materials, design or workmanship. and are therefore expressly excluded from
warranty claims.
Modification costs or damages arising from operation of the product under deviating
conditions are not covered by warranty.
6.
Exclusions from warranty:
−Service and maintenance work as well as repair and replacement of consumables
according to our consumables‘ list
−Transportation cost of the machine or installation and dismounting expenses incurred
−Damages due to use of the product other than for its intended purpose
−Damages due to faulty installation or insufficient maintenance of the product (e.g.
decalcification)
−Damages due to natural disaster e.g. lightning, water, fire, act of nature beyond
control, war, inadequate line voltage, insufficient ventilation, no decalcification,
insufficient care and cleaning or non-adherence to operation and maintenance
instructions according to the accompanying operation guide.
−Damage due to use of the product other than in accordance with the instructions
provided by REITEL Feinwerktechnik GmH;
−The warranty does not cover the cost of removal and replacement of parts and
accessories, unless supplied as original equipment by REITEL Feinwerktechnik
GmbH
−All kind of damages occurred not directly at the device as well as consequential
damages (e.g. damages to furniture due to a lack of water, downtime of the machine,
material, lost working hours, wages and other consequential damages).
This warranty shall be rendered null and void if:
−the product has been subject to any modification, repair or replacement other than as
authorised by REITEL Feinwerktechnik GmbH
−the product is continued to be operated despite a functional defect

17
7.
The warranty is device specific and may be claimed, within the warranty period, by any
person who has legally acquired the device.
8.
Consumables are excluded from warranty. Spare parts are subject to a warranty coverage of
6 months against all defects traceable to materials, design or workmanship according to
these warranty regulations.
9.
Legal default claims on the part of the purchaser remain unaffected by this warranty.
10.
We reserve the right to charge a fee if repair of the device is rejected and the device is
destined to be sent back unrepaired.
11.
Please note:
Upon repair or replacement of this unit, personal data and settings might get lost or
damaged. We don’t accept liability for all kind of data loss. The customer is advised to
backup essential programs and data before sending for service.
12.
This warranty shall be interpreted in accordance with German law to the exclusion of UN
sales law. Place of jurisdiction is our business location.
13.
If any provisions of this warranty are judged to be illegal or unenforceable, the continuation in
full force and effect of the remaining provisions will not be prejudiced. The provisions of this
warranty judged to be illegal or unenforceable shall be construed so as to give effect to the
intent manifested by the provision held invalid, illegal or unenforceable and to give effect to
section 13 hereof.
14.
Should you need to borrow a device while your device is being repaired, please contact
Messrs. REITEL or your distributor. These loans are a service for which availability cannot
necessarily be guaranteed. After the warranty period, a free may be charged for loan
equipment as well as for shipping and packaging.

18
Disposal Regulations
According to valid laws our devices are properly disposed of according to B2B –
Regulations for proper disposal. Pls. contact your local dealer for additional
information.
Spare Parts List
Best.Nr.
neu 2018
Rotogrind (VA) (22.1 + 22.2)
Ersatzteilliste/Spare Parts List 03/2019
Stck/
ME
Qty.
ME
Unit
E7056200
"Klebt + Dichtet" 70 ml Tube
Sealing glue, 70 ml tube
1
Stck
piece
E6014500
Ablaufschlauch Di 30 mm
Drain hose
0,8
m
E7059610
Dichtfett
Sealing grease
1
Stck
piece
E6012010
Dichtungsgummi für Frontabdeckung ( ab 22.2 1013 413 )
Front rubber seal
1
Stck
piece
E6014800
Dichtungsgummi für Frontausschnitt
Rubber sealing for front cutout
1
Stck
piece
E6015100
Inbusschlüssel 2mm
Allen key 2 mm
1
Stck
piece
E6015120
Inbusschlüssel Größe 5
Allen key, 5 mm
1
Stck
piece
E7254400
LED-Lampe Leuchtkörper (nur für Trafo E60173)
LED lamp bulb (only for network adapter E60173)
1
Stck
piece
E7328000
Linearkugellager rostfrei (KFO) inkl. 61364.4 (2 St./Tisch)
1
Stck
piece
E6019710
Schalter mit Wiedereinschaltschutz 2 / 3 / 4
Switch incl. restart protection 2 / 3 / 4
1
Stck
piece
E6015600
Schleifscheiben- Unterlegscheibe Alu
Grinding disc support
1
Stck
piece
E6013210
Schleifscheibenaufnahme (Alu)
Aluminium disc support
1
Stck
piece
E6037900
Umschalter
Selector switch
1
Stck
piece
E6022000
Wasser-Zulaufschlauch
Water-feed hose
1
Stck
piece
20305000
KFO angulation table, Adaptation required by the
manufacturer
1
Bgr
assy

19
EG Conformity Declaration

We manufacture in compliance with Quality Management ISO 9001:2015 incorporating
established standards.
REITEL Feinwerktechnik GmbH
Senfdamm 20 | 49152 Bad Essen
Phone: [phone] | Fax: [phone]
www.reitel.com | [email protected]
102019