REITEL ROTOGRIND NT User manual

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REITEL Feinwerktechnik GmbH
Senfdamm 20
D - 49152 Bad Essen
Phone: [phone] / 9432-0
Fax: [phone] / 9432-40
Operating Instructions
ROTOGRIND NT
With the purchase of the ROTOGRIND NT you have made your decision for a REITEL-quality product.
After having unpacked the device, please check carefully whether transportation damages of any kind have occured. 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.
Equipment
Basic Equipment
•Universal dry/wet trimmer ROTOGRIND NT
•Inflow and outflow hose
•Hex head wrench (Allen wrench), size 6
•Hex head wrench (Allen wrench), size 2
Special Equipment
•Reference 20306 Halogen work lamp
•Reference 17901 Suction DUSTY – MAX
•Reference 20302-20303 – Several diamond grinding discs for wet grinding
•Reference 20401 DELTA-Diamond grinding disc for dry and wet grinding
•Reference 20301 Segmented diamond grinding disc for dry and wet grinding

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REITEL Feinwerktechnik GmbH is subject to regular quality audits for verification of processes.
A constantly high quality is achieved by precise manufacturing and individual functional system test.
CONTENTS
1 GENERAL NOTES.............................................................................................................................................................3
1.1 G ENERAL S AFETY I NSTRUCTIONS ..................................................................................................................................3
1.2 S PECIFIC I NSTRUCTIONS FOR THIS DEVICE .....................................................................................................................3
2 INSTALLATION ................................................................................................................................................................4
3 NOTES FOR THE USER...................................................................................................................................................4
3.1 C HANGING THE GRINDING DISC .....................................................................................................................................4
3.2 W ORKING ON PIECES .....................................................................................................................................................5
4 TROUBLESHOOTING......................................................................................................................................................5
5 MAINTENANCE ................................................................................................................................................................6
6 WARRANTY.......................................................................................................................................................................7
7 RULES FOR DISPOSAL OF COMMERCIAL ELECTRICAL EQUIPMENT ..........................................................7
8 TECHNICAL DATA...........................................................................................................................................................7
9 KEY ......................................................................................................................................................................................8
9.1 S PARE P ARTS L IST .........................................................................................................................................................9

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1 General Notes
1.1 General Safety Instructions
•Check all hose joints for tightness, if necessary tighten hose clamps.
•Operating instructions must be read and followed by all personnel who use this device
•Furthermore, personnel should follow all local safety rules.
•To avoid injury, appropriate protective clothing, noise absorption, protective eyewear and other tools have
to be used.
•If the machine is defective or working improperly it must be taken out of service. Call your dealer
immediately then.
•This device has been designated to be used only for its intended purpose. All other applications must be
prohibited for safety reasons.
•In case of danger turn off the machine and call your dealer or manufacturer for help.
•This device should not be left running while unattended.
•Turn all power sources off after having finished work.
•Repairs may be carried out only by experts. Persons doing repair take over responsibility for proper work
and adherence to accident-prevention regulations (UVV).
•Only use original spare parts
•Modifications may only be made after consultation with, and by permission of the manufacturer. In case of
modifications without permission all warranty and liability claims will expire.
•The machine should be operated in a clean, air-conditioned room with a temperature of 15 to 35°C.
•Danger of fire: Respect the fire regulations. Leave enough space around.
•Don’t use mobiles near the machine since they may lead to disturbances.
•Don’t place anything on top of the machine.
•REITEL Feinwerktechnik GmbH assumes no liability for damages to surfaces
caused by equipment supports/feet.
1.2 Specific Instructions for this device
•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 until it has stopped completely.
•The ROTOGRIND NT is a table top machine. Supporting surfaces should be straight and
adequately stable
•Please wear protection glasses during operation in case of dust exposure hazard.
•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 hand into the running device.
•Only turn the machine on again when the grinding disc is completely standing still.
•Don’t use worn or damaged grinding discs.
Investment material and modern grade 4 plaster reduce durability of grinding discs. Metal and quartzous
material shouldn’t get in touch with diamond grinding discs.

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•Only change the grinding disc when it stands still and the whole unit is unplugged.
•Place a backing plate between support and grinding disc.
•Only use original – Reitel-grinding discs with an external diameter of 250 mm.
They are subject to special manufacturer’s and quality rules. Otherwise all kind of warranty claims
will expire.
•Always respect the regulations of the grinding disc manufacturer (e.g. max. speed, sense of
rotation, cutting speed, material to be worked on).
2 Installation
•Install water supply with a pressure of 2 - 6 bar
(pre-installed hose at the device incl. hose clamp)
•Lead the wastewater downwards via a hose (7) into the settling basin
(respect DVGW rules)
•Establish electric power supply (230V, 50/60 Hz)
•Fix exhaust dust collector for dry trimming with a hose to the device (5) and put the exhaust’s plug into the
trimmer socket (optionally connectable)
3 Notes for the User
3.1 Changing the grinding disc
1. Turn-off main switch (10).
2. Pull power plug.
3. Wait until the grinding disc has completely stopped.
4. Open quick release (6) and remove the front forwards.
5. Release the central nut in the middle of the disc by using the allen key counter-clockwise and remove the old
disc.
6. Clean the disc’s fences and supporting disc, put on supporting and new grinding disc and ensure that it’s placed
correctly . Then fix the screw in a clockwise direction.
7. Clean rubber sealing, put front in again and lock it with the quick release (6).
Note:
The ROTOGRIND NT includes 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.

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3.2 Working on pieces
1. Turn on power switch (10).
2. Adjust the angle of support (3) by the screw (4) and secure with knurled nut.
3. Choose grinding - dry grinding (switch position „cloud“)
- wet grinding (switch position „tap“)
4. Adjust water supply with swivelling lever (right side of device)
(horizontal lever positionwater tap is open, vertical lever position water tap is closed)
5. Put the model to be worked on the support and press it against the rotating disc (2).
6. Only grind suitable material (see chapter 1.2).
7. Turn off the device, disc is stopping after a short time
8. When turning on the machine again, excessive water is automatically removed from the grinding support,
enabling immediately dry grinding.
4 Troubleshooting
•Abrasive power decreases:
−Replace blunt or damaged grinding discs
−Clean dirty grinding discs (e.g. with a steam cleaner)
−Sharpen blunt grinding discs by using a whetstone (available from REITEL).
−Investments and modern grade 4 plaster decrease life of the grinding discs
−Check water purification, rinsing port might be blocked, too little water
•Device is leaking:
−Check correct fitting of the front cover (1)
−Clean the sealing behind the front, if necessary grease the sealing with vaseline
•Machine doesn’t work:
−Check power supply and mains fuse
−Check safety switch by opening and closing the front
•Grinding disc doesn’t rotate: Machine is leaking:
−In case of blocking turn off main switch and press system’s fuse after 5 minutes
−Central nut is not tight or doesn’t tense the disc (grinding disc too thin – external brand)
•Problems with water drain:
−The drain hose should be slightly inclining on its way to the settling basin
−Drain hose is blocked
•Odour nuisance during operation:
−When re-starting the device wait until the grinding disc has completely stopped
−If the device is turned on and off too often brake smell will arise
•Grinding vibrations:

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−First smoothen support by grinding
−Check disc concentricity – axial eccentricity
•Device moves on the support:
−Disc runs unbalanced
−Distance sheets are dirty
If the problem cannot be solved pls. inform your dealer or REITEL – customer service.
5 Maintenance
•Clean the front- and the inner grinding space (recommendation: once a week):
1. Wait until the disc has completely stopped
2. Open lateral quick closing and pull out the front forwards
3. Clean the front under flowing water
4. Clean internal space with a moisty cloth
5. Re-assembly vice versa

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6 Warranty
We offer a
1 year warranty
beginning from the official date of purchase. This warranty covers all defects traceable to materials, design or
workmanship. During this time, we’ll repair these defects at no charge. Please carefully pack and ship the device
pre-paid to us, along with a report describing the defect. You must also include a copy of your invoice.
This warranty does not include consumable parts or workpieces. We assume no liability for damages caused by
inappropriate use, or damage caused by continued use of malfunctioning equipment, or any other damage. This
warranty does not apply to equipment which has been modified, whether by the purchaser or any other third party.
If the machine shows any failure regarding function or use it has to be put out of operation. If the machine is
continued to be used warranty expires.
Loan Equipment
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 fee may be charged for loan equipment as well as for shipping and packaging.
Hotline:
In case of system failures, please don’t hesitate to contact your specialist ot directly the REITEL service
dept., phone: [phone] or -0 (Reception)
7 Rules for Disposal of Commercial Electrical Equipment
According to valid laws our devices are properly disposed of according to B2B – Regulations for
proper disposal. Please contact your local dealer for additional information.
8 Technical Data
Line voltage 230 V / 50 Hz
Grinding mode Dry / wet
Current consumption 1500 W
Height/width/depth: 340 / 350 / 430 mm
Weight 17 kg
Speed 3000 t/min
Disc diameter 250 mm

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Housing
Stainless steel
Noise level 70 dB (A)
Reference 12201
9 Key
(1) Front
(2) Disc
(3) Support
(4) Screw for support adjustment with counter nut
(5) Suction for dry grinding
(6) Quick release fastener (secured with Allen screw)
(7) Hose for wet grinding
(8) Suction socket
(9) Power supply
(10) Main switch
(11) Water control
(12) Choice button dry or wet grinding
(13) Overload circuit breaker
(14) Water feed
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2
3
4
5
6
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9.1 Spare Parts List
Reference.
Part Piece / Qty. Unit
E60156 Grinding disc support 1 piece
E60102 Complete support tray 2 piece
E60177 Bottom plate 1 piece
E60096 Sealing for axle 1 set
E60126 Rubber feet (3 pcs./pack) 1 set
E60115 Connector plug 1 piece
E60114 Rubber profile for front profile 1 piece
E60164 Complete motor cover 1 piece
E60188 Rubber metal element 1 piece
E60148 Rubber seal for front opening 1 piece
E60037 Ball valve with black handle 1 piece
E61540 Halogen lamp 1 piece
E60151 Allen wrench 2mm 1 piece
E60151.2 Allen wrench, size 5 1 piece
E61333 Ball bearing 1 piece
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8
12
10
14
13
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E60398 Condenser 16µF for Rotogrind and older devices 1 piece
E72239 Condenser 30µF for Rotogrind NT 1 piece
E74011 Motor with brake 1500W 1 piece
E74011.1 Brake for motor 1500W 1 piece
E60131 Pad nut 1 piece
E60128 Rubber collar splash guard 1 piece
E62313 Temperature control for motor 1 piece
E60192 Tray 1 piece
E60145 Drain hose 1 m
E60197 Switch 1 / 5 / 6 1 piece
E60197.1 Switch with restart protection 2 / 3 / 4 1 piece
E60940 Micro switch with lever 1 piece
E71120 Countersink screw tension screw and tension disc 1 piece
E60199 Flush tube unit for disc rinsing until 04/2007 1 piece
E60132.1 Disc unit (aluminium) 1 piece
E81004 Large flush tube for disc rinsing 1 piece
E61371 Small flush tube for disc rinsing 1 piece
E60081 Supporting disc 1 piece
E60133 Pin wrench 1 piece
E60013 Hose clip 1 piece
E70919 Hose clip 1 piece
E60116 Overcurrent circuit breaker 9A (older version) 1 piece
E74313 Overcurrent circuit breaker 10A 1 piece
E60220 Supply tube 1 piece
E60132 Disc support 1 piece
E62146 Relay with base 1 piece
E60113 Front assembly with support table 1 piece
E61312 Built-in socket with cover 1 piece
E61682 Dust indicator tube 1 piece
E60379 Switch 1 piece
E60173 Transformer for halogen lamp 1 piece
E60374 Time relay 1 piece
E60110 Lock 1 piece
E60169 Magnetic valve 1 piece
E60108 Adjusting spindle for support table 1 piece
E60087 Water reduction 1 piece
E70506 Water tube 1 m
E60158 Feed 1 piece