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Wash the inside part of gear reducer housing using the same oil type
suitable for the running; the oil used for this wash can be applied for
further washings after proper filtering by 25 μm of filtration standard.
Fill in the gear reducer again up to level.
It is always recommended to replace the seal rings (see ch. 9.3)
When dismounting the cap (whenever gear reducers are provided
with), reset the sealing with adhesive on cleaned and degreased
mating surfaces.
9.2 - Coil
In case of long non-running periods at ambient temperatures lower
than 0 °C, the coil should be emptied out using compressed air to
blast out all the coolant, so as to avoid freezing-up which would
cause the coil to break.
9.3 - Seal rings
It is always recommended that the seal rings are replaced with new
ones when they are removed or during periodic checks of gear redu-
cer; in this case, the new ring should be generously greased and
positioned so that the seal line does not work on the same point of
sliding contact as the previous ring.
Oil seals must be protected against heat radiation, also during the
shrink fitting of parts, if applicable.
Durating depends on several factor such as dragging speed, tempe-
rature, ambient conditions, ect.; as a rough guide; it can vary from
3 150 to 25 000h.
9.4 - Motor replacement
Since gearmotors are realised with standardised motor, motor
re placement – in case of failure – is extremely easy. Simply observe
the following instructions:
– be sure that the mating surfaces are machined under accuracy
rating (IEC 60072-1);
– clean surfaces to be fitted thoroughly;
– check and, if necessary, lower the parallel key so as to leave a
clearance of 0,1 0,2 mm between its top and the bottom of the
keyway of the hole. If shaft keyway is without shoulder, lock the
key with a pin.
For worm gearmotors MR V, parallel shaft gearmotrs MR 2I and
MR 3I 140 ... 360, right angle shaft gearmotors MR CI, C2I (motor
shaft end keyed directly into the worm, the cylindrical or bevel pnion
shaft, respectively);
– check that the fit-tolerance (push-fit) between hole and shaft end is
G7/j6 for D 28 mm, F7/k6 for D 38 mm;
– lubricate surfaces to be fitted against fretting corrosion.
For parallel shaft gearmotors (2I, 3I) with motor size 200 ... 315
and gearmotors MR V, MR 2I and MR CI with non-standard
design «Square flange for servomotors», proceed as follows for
disassembling:
– align the key through hole with the tightening screw of the hub
clamp;
– loosen the tightening screw and consequently the hub clamp;
– disassemble the motor.
For worm gearmotors MR IV and MR 2IV, parallel shaft gearmo-
tors MR 3I 40 ... 125 and MR 4I, right angle shafts gearmotors MR
ICI and MR C3I, coaxial gearmotors (cylindrical pinion keyed on to
the motor shaft end);
– check that the fit-tolerance (standard locking) between hole and
shaft end is K6/j6 for D 28 mm, and J6/k6 for D 38 mm;
– make sure that the motors have bearing location and overhang
(distance S) as shown in the table;
Motor
Min dynamic load capacity
size
Front
63
450
71
630
80
900
90
1 320
2 000
100
112
2 500
132
3 550
4 750
160
180
6 300
200
8 000
225
10 000
250
12 500
280
16 000
– mount onto the motor shaft as follows:
– the spacer pre-heated at 65° C treating the relevant motor shaft
area with adhesive type LOXEAL 58-14 and checking that betwe-
en keyway and motor shaft shoulder there is a cylindrical part
ground by 1,5 mm at least; pay attention not to damage the
external surface of spacer;
– the key in the keyway, making sure that a contact length of at least
0,9 times the pinion width is present;
– the pinion pre-heated at 80 ÷ 100 °C;
Max dimension
daN
'S' mm
Rear
335
16
475
18
670
20
1 000
22,5
1 500
25
1 900
28
2 650
33,5
3 350
37 ,5
4 500
40
5 600
45
7 100
47 ,5
9 000
53
11 200
56
Operating instructions
– the axial fastening system when foreseen (self locking screw on
motor shaft butt-end with washer and spacer or hub clamp with 1
or more dowels, fig. a); for the cases foreseen without axial faste-
ning (fig. b), apply adhesive type LOXEAL 58-14 also on the motor
shaft part laying under the pinion;
– in case of axial fastening system with hub clamp and dowels, make
sure that they do not overhung from spacer external surface:
screw the dowels completely and, if necessary, imprint the motor
shaft with a point;
– grease (with grease type KLÜBER Petamo GHY 133N) the pinion
teeth, the seal ring rotary seating and the ring itself, and assemble
carefully.
9.5 - Bearings
Since there are many different types of bearings in a gear reducer
(roller, tapered roller, straight roller, etc.) and each bearing works with
different loads and speeds depending on the input speed, the nature
of the load of the driven machine, the transmission ratio, etc., and
with different lubricants (oil bath, oil splash, grease, oil circulation,
etc.), it is not possible to define any periodical maintenance and
replacement of bearings in advance.
If a precautionally maintenance is required, undertake periodical
checks to verify noise level and vibration with the help of appro-
piate diagniostic equipment and instruments. If the measured
values worsen even slightly it is necessary to stop gear reducer or
gear motor and after having inspected inside the unit replace the
bearings which are subject to breakdown.
9.6 - Metal filler plug with filter and valve
When the gear reducer or gearmotor (size 100) is
equipped with metal filler plug with filter and valve
(see fig.), in order to clean it, it is necessary to
unscrew it from the gear reducer (preventing any
debris or other foreign items from entering the
reducer, disassemble the cover, wash it with solvent, dry with com-
pressed air and reassemble it). This operation is to be made accor-
ding to environment conditions.
10 - Sound levels
Most of the Rossi product range
is cha racterised by sound pres-
sure levels L ¯
(mean value of
pA
mea-surement, assuming nomi-
nal load and input speed n
1 400 min
-1
, at 1 m from exter-
nal profile of gear reducer stan-
ding in free field on a reflecting
surface, according to draft pro-
posal ISO/CD 8579) lower or
equal to 85 dB(A).
The table indicates the pro ducts
which can exceed a.m. thre-
shold. For further information
about sound levels of every sin-
gle product see Rossi technical
catalogues.
4090INS.VPR-en1210HQM
Machine/Train of gears
i
N
3,15 160
Parallel shaft
R I
4
=
R 2I
all
1
all
R 3I
R 4I
160 500
200 630
all
Right angle shaft R CI
R C2I
63 400
71 500
R C3I
all
Right angle shaft R C
1
Rossi
IT
EN
Size
200
320
400
320
630
250
19
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