Renfert Mt2 is a plaster trimmer designed for trimming plaster models. It features a powerful 1500W motor and a 2,860 r.p.m. disc, providing efficient and precise trimming. The unit is equipped with a water spray system to minimize dust and ensure a clean work environment. Additionally, it has a spacious model tray for convenient placement of models. The Renfert Mt2 is suitable for various dental and laboratory applications, including trimming orthodontic models, study models, and surgical guides.
Renfert Mt2 is a plaster trimmer designed for trimming plaster models. It features a powerful 1500W motor and a 2,860 r.p.m. disc, providing efficient and precise trimming. The unit is equipped with a water spray system to minimize dust and ensure a clean work environment. Additionally, it has a spacious model tray for convenient placement of models. The Renfert Mt2 is suitable for various dental and laboratory applications, including trimming orthodontic models, study models, and surgical guides.
© Renfert GmbH TM 04/02
IndexIndex
Plaster Trimmer MT2
No. 1902-0000
Areas of Caution
Observe the regulations for prevention of accidents of the Employer's Liability Insurance Association
and the following safety precautions when trimming:
• Do not touch the disc when trimmer is live because there is danger of injury as soon as the machine
runs.
• Do not work at the trimmer with long, untied hair or loose clothes. By winding them into the running
machine, there is danger of injury.
• The unit is intended for trimming plaster models only.
• Do not open the front cover whilst the motor is running. The motor switches off automatically when
the front cover is opened, however, the disc continues rotating for approx. 5 sec.
• Wear your safety goggles when trimming.
• Open the front cover only after the
complete standstill of the grinding disc.
• Never reach into a rotating disc.
• Never work without the model tray. There is a risk of injury if small parts or fingers enter the space
between the disc and the casing.
Cleaning / Maintenance
A clean flow of water and a clear drainage channel are important factors for the smooth functioning of
the trimmer. For this reason the unit should be cleaned at least weekly. To do this switch off the unit,
unplug (11) and close off the shut-off valve. Wait for the disc to come to a halt before opening the lock
(9), then swing the front cover (2) all the way to the left or unhinge. Clean the front cover under running
water with a brush. Use the brush to clean the inner parts and the drainage channel. After cleaning, re-
hinge the front cover and close it using the lock on the right side. Ensure that the spacer ring is present
on the hinge-bolt.
6.1 Changing the trimmer disc:
Switch off the unit, unplug (11), close the shut-off
valve and open the front cover. Change the spray pipe
as per part 6.3.
Using the Allen key SW4 (4) loosen the central screw
in the middle of the trimmer disc by turning it anti-
clockwise. Remove the screw. Clean the support
flange if necessary.
When fitting the new trimmer disc always make sure
that the locking pins fit comfortably in the stabiliser
holes of the trimmer disc. Tighten the screw (5) with
the Allen key by turning it clockwise.
After tightening the screw check the rotation of the
disc by turning it manually. If the disc touches then it
should be removed, turned by 180
o
, and then
replaced. Close the front cover making sure that the
spacer ring is present on the hinge-bolt. Plug in and
re-open the shut-off valve.
Fig. 1
© Renfert GmbH TM 04/02
IndexIndex
6.2 Changing / Cleaning of the support flange:
Remove the trimmer disc as per previous instructions.
Next, use the screw (7) and Allen key SW8 (3) to ease off the support flange (8) from the motor shaft
and clean the working area and the support flange. When cleaning the working area make sure that no
water gets through the opening for the motor shaft into the motor compartment. Remove the screw from
the support flange again. After rubbing a little Vaseline into the motor shaft and the black rubber washer
on the support flange push the support flange back onto the motor shaft. Take note of the position of
the take-up on the motor shaft and the position of the take-up nut on the support flange. These must
match. Replace the trimmer disc as per the instructions in point 6.1.
6.3 Changing / Cleaning the spray pipe:
Switch off the unit, unplug (11), close the shut-off valve and open the front cover (2) as described in
point 6.
Remove the spray pipe (15) from the water supply pipe by gently moving it back and forth. Remove the
washers and place them in a suitable de-scaling liquid. After successfully cleaning the washers replace
them, smear them with a bit of Vaseline and gently feed the spray pipe back into the water supply pipe.
Close the front cover. Ensure that the spacer ring is present on the hinge-bolt. Replace the plug and re-
open the shut-off valve.
6.4 Changing / Cleaning the grinding platform:
The grinding platform (1) is easily cleaned. It can be removed from the front plate and be rinsed under
cold, running water. After snapping it back into place, take care that it fits perfectly (see Fig. 2). 98° and
90° grinding platforms are available and may be interchanged as needed. Both types of grinding
platform are supplied with the trimmer. To ensure an easier montage of the tables cover them in
advance with some silicon oil or detergent water on flushing water.
Always make sure that the grinding platforms are seated correctly on the front cover!
Fig. 2
r
r
© Renfert GmbH TM 04/02
IndexIndex
Fault Cause Remedy
The unit • The electricity supply is • Check the electricity
does not not properly connected. supply.
switch on. • The electrical safety • Check the safety device.
device is defect.
• The front lid is not • Close the front lid.
closed properly.
• The motor is overhea- • Let the motor cool down.
ted. Switch on the power
switch again.
The disc • Not enough water • Open the water supply.
jams. pressure.
• The quantity of water • Increase the water
flowing to unit is in- supply to the trimmer.
correctly set.
• The water supply is not • Open the water supply.
fully opened.
• The spraypipe is • Clean / de-scale the
blocked. pipe.
Water • Too much water. • Reduce the water
sprays out supply to the trimmer.
of the trim- • The water drainage is • Check if the drainage
mer ope- not functioning properly. pipe is attached properly
ning. (gradient).
The disc is • Disc is not lying flat • Refit the disc according
wobbling. against the joint. to the instructions.
• Disc has not been tigh- • Hand-tighten the disc.
tened sufficiently.
No water. • Water supply is not • Check the water supply.
properly connected.
• Spraypipe is clogged. • Clean / de-scale the
pipe.
Model tray • Model tray is not • Refit the model tray
wobbles. mounted properly. according to the instruc-
tions.
Troubleshooting
Guide
Technical Specifications
Tension: 230 V, 50 Hz
Power input: 1500 W
Water consumption: max. 7 litres per minute
Speed: 2,860 r.p.m.
Dimensions: 334 x 320 x 456 mm (WxHxD)
Weight: 26.5 kg
Level of noise pressure according
to DIN 45635-01-KL3 measured
when machine was charged totally: Lp(A) = 74 dB(A) K = 4 dB
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Renfert Mt2 is a plaster trimmer designed for trimming plaster models. It features a powerful 1500W motor and a 2,860 r.p.m. disc, providing efficient and precise trimming. The unit is equipped with a water spray system to minimize dust and ensure a clean work environment. Additionally, it has a spacious model tray for convenient placement of models. The Renfert Mt2 is suitable for various dental and laboratory applications, including trimming orthodontic models, study models, and surgical guides.
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