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 ROTOGRIND NT trimmer with disc rinsing technology is well-equipped as both wet and
dry trimmer for all applications. The disc rinsing keeps the disc clean, even after dry
operation and prevents clogging. The front cover can easily be removed by a special quick
release for convenient cleaning, fulfilling hygienic standards. For safety reasons, the
ROTOGRIND NT is equipped with a quick stop and restart protection. The large grinding disc
opening offers convenient access to the selected diamond or corundum grinding disc. The
laser-engraved angle markings on the tray table provide perfect model alignment with
variable angle adjustment and locking positions. During dry operation, dust is extracted
directly from the tray table without having to change anything on the device. A high level of
stability is ensured thanks to the robust stainless steel housing.
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
EU DIRECTIVE ............................................................................................................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 Silicon carbide grinding disc
•Order-No.: 20302000 Fully coated diamond grinding disc „medium“
•Order-No.: 20303000 Fully coated diamond grinding disc „rough“
•Order-No.: 23401000 Partially coated diamond grinding disc „DELTA“, triangle
segmented
•Order-No.: 23301000 Partially coated diamond grinding disc „PW“, mounted points
•Order-No.: 27902000 Extraction unit DUSTY COMFORT
•Order-No.: 20305000 Orthodontic angulation table (fitting for grinding disc Ø 280 mm)

5
Device components
1 Front cover
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 Power 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 pin
15 Disc rinsing tube, small
16 Rubber seal
17 Retaining screw for fixing and removing grinding disc
18 Disc rinsing tube, large
19 Water inlet connector

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
Base of the unit (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
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:
•Prior to opening the device, remove the locking pin (Allen® key)
at the quick release (6).
•Only use the ROTOGRIND NT with grinding discs, Ø 250 mm with exception of the
orthodontic front cover, which is used with a grinding disc, Ø 280 mm. Smaller discs
are not permitted since they increase the risk of injury
•Investment material and dry hard plaster reduce the lifetime of the grinding disc. The
diamond grinding discs may not come into contact with metal and quartzite material.
The diamonds will start to melt immediately and the grinding disc becomes 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 cover, please keep in mind that the grinding disc
doesn’t stop immediately after the machine has been turned off. Wait until it has stopped
completely.
•Wear safety glasses when trimming.
•Always use a wedging block when working on smaller pieces.
•First put the model on the tray table and then push it against the grinding disc.
•Never reach into the running machine.
•Only switch on the machine when the grinding disc is standing still.
•Don’t use worn or damaged grinding discs.
•Only change the grinding disc when it is standing 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 disc’s 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. Connect the supplied hose to the water inlet connector (19) and fasten the hose clamp
included in delivery. Connect the other end of the hose to your water tap.
2. Attach the drain hose to the water outlet (6). Route drain hose to plaster sink (respect
local regulations), making sure it is sloped downward, toward drain, and free of kinks.
3. Connect the trimmer to the power supply.
4. For dry trimming, connect the extraction unit to the extraction hose (5) and plug the
extractor’s plug into the trimmer socket (8).
5. Before putting the device into operation, remove the locking pin from the quick release.
Changing a grinding disc
1. Turn off power switch (10). Pull the mains plug (9) from the socket.
2. Wait until the grinding disc has completely stopped.
3. Open the quick release (6) and then open the front cover (1)
4. Use the Allen® key (see chapter 1.1) to remove the retaining screw (17) counter-
clockwise while holding the grinding disc. Then remove the grinding disc.
5. Before mounting, be sure the back of the grinding disc and the mounting surfaces are
free of any dirt, debris or build up. Place grinding disc on backing plate hug and ensure
correct positioning. Finally fasten the retaining screw clockwise.
6. Close the front cover with the quick release (6).

12
Operation
Chronological run of operation
1. Use the switch (12) to select the required grinding mode (12):
−dry trimming (switch position "cloud")
−wet trimming (switch position "water tap")
2. Adjust the inclination angle of the tray table (3) with the adjusting spindle (4). Secure it
with the lock nut. Press power button (10).
3. Regulate water supply with the black handle (11) of the ball valve (on the right side of the
device) (lever in horizontal position →open tap, lever in vertical position →closed tap).
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 grinding disc (2).
It is prohibited to use the trimmer with inadmissible material.
5. Switch off the device after operation. The disc stops running after a short time.
6. When switching on again, excess water is automatically removed from the grinding disc,
enabling immediate changeover to dry trimming.
Cleaning
1. Turn off power button (10).
2. Pull off power plug (9) from socket.
3. Wait until the grinding disc has completely stopped.
4. Open the quick release (6) and remove the hinge (14) locking pin. Pull the locking pin out
of the guide and remove the front cover (1) towards yourself.
5. Clean the front cover under running water and the inside with a damp cloth.
6. Clean the rubber gasket. Reinstall the front cover (1) and fix it with the locking pin (14).
Tighten the locking hinge pin (14) and close the front cover (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 (Switching operation is
triggered by the pin at the housing).
Low abrasion
a. Replace worn or defective grinding
discs.
b. Clean dirty grinding discs (e.g. with a
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 gasket behind the front cover,
use e.g. Vaseline to grease it
c. Replace gasket.
Grinding disc stands still.
a. In case of blocking, turn power switch
off and after 5 min. push in the
appliance fuse.
b. Retaining screw is not tightened or
does not tension the disc (grinding disc
too thin –third-party product) →Use
spacer.
Clogged drain
a. Route drain hose to sink basin making
sure it is sloped downward, toward
drain, and free of kinks.
b. Clogged drain hose, unclog.
Odor nuisance during operation.
a. Brake grinding →inform customer
service.
b. Too frequent switching on and off leads
to smell of the brake.
Vibrations during trimming.
a. Clean mounting surfaces
b. Check the axial runout of the grinding
disc.
Device moves on the table.
a. Unbalanced grinding disc→replace.
b. Dirty grinding disc →clean.
c. Place the device on a vibration-free and
stable 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
EU DIRECTIVE

We manufacture in compliance with Quality Management ISO 13485:2016 incorporating
established standards.
REITEL Feinwerktechnik GmbH
Senfdamm 20 | 49152 Bad Essen
Phone: [phone] | Fax: [phone]
www.reitel.com | [email protected]
122021