6
Mounting flange on output shaft
Usage Gear units can be supplied with an EBD mounting flange on the LSS (option …"/EF22" or "/EF21").
Counterflange for flange mounted gear units
Gear units can be supplied with a mounting flange on the LSS. Dependent on the bearing configuration, the two flange types are called
• "Mounting flange"
• "EBD mounting flange"
Basically, both flange types are possible for all gear unit designs and mounting positions:
• MC.L..
• MC.V..
• MC.E..
Mounting flange
Solid shaft LSS Hollow shaft LSS
56611AXX
Catalog – Mixer and Agitator Drives of the MC.. Series

Mounting flange on output shaft
EBD mounting flange
Solid shaft LSS Hollow shaft LSS
6
59355AXX
The counterflange must have the following characteristics:
• Stiff and torsionally rigid, taking into consideration
– gear unit weight
– motor weight
– the torque that has to be transmitted
– additional forces acting on the gear unit from the customer machine (e.g. axial forces from and towards gear unit from a mixing process)
• Horizontal
• Plain
• Vibration isolating, that means no vibrations are to be transmitted from close-by machines and elements
• No resonance vibrations should be created
• A bore with H7 fitting matching the centering shoulder of the gear unit flange according to the dimension drawing
The mounting surface of mounting flange and counter flange must be absolutely free of grease or oil and from other contamination (e.g. small textile particles,
dust, ...).
The alignment of the gear unit LSS in relation to the counterflange has to be as accurate as possible. This has an effect on the lifetime of bearing, shafts and coupling.
Allowable misalignments for the coupling on the LSS can be seen in chapter 5.2 or in a separate coupling manual.
Following bolts of the 8.8 class should be used (tensile strength 640 N/mm
2
)
Gear unit size
MC..
02
03
04
05
06
07
08
09
Mounting flange
8 x M16
8 x M16
8 x M16
8 x M20
8 x M20
8 x M20
8 x M24
8 x M24
EBD mounting flange
16 x M16
16 x M16
16 x M16
16 x M16
16 x M20
16 x M20
16 x M24
16 x M24
6
Catalog – Mixer and Agitator Drives of the MC.. Series

6
EBD sealing systems
Standard sealing system
• Two NBR shaft seals on ground bushing for vertical LSS downwards (= M5; shaft position 3).
• 1 NBR shaft seal for vertical LSS upwards (= M5; shaft position 4) and for other mounting positions.
• Radial labyrinth.
[3] [2] [1]
58295AXX
[1] Radial labyrinth
[2] Ground bushing
[3] Shaft seals
Optional sealing systems
The following options are pre-defined:
• Grease nipple and piping for radial labyrinth (extra protection for shaft seals in dusty environments) for foot mounted gear units.
• Shaft seals made from Viton instead of NBR.
• Leakage indicator (for sizes 02 and 03) for gear units with vertical LSS pointing downward.
Catalog – Mixer and Agitator Drives of the MC.. Series

Drywell
EBD sealing systems
[3]
[4]
Drywell sealing system (for sizes 04…09) for gear units with vertical LSS pointing downward in conjunction with pressure lubrication. The lower bearing is grease lubricated and protected from the oil by a built-in pipe (in white color), also referred to as "Drywell". The oil level is below the upper end of the drywell which means the upper bearings and partly the gearset are pressure lubricated by an oil pump. In case of wear of the LSS seals, no oil can leak from the oil bath to the LSS.
[1]
[5]
6
6
[2]
[1] Pressure oil lubricated upper bearings and gears
[2] Grease lubricated lower bearings
[3] Regreasing pipe
[4] Old grease outlet
[5] Pipe
58358AXX
Due to the reduced oil level requirement in the gear unit housing, an additional oil tank may be necessary. This is dependent from
• gear unit size
• input speed; input speed range
• ratio
• input power
• selected pump size / pump delivery volume
• thermal issues
For a guideline for using an additional oil tank, refer to chapter 6.3.
Catalog – Mixer and Agitator Drives of the MC.. Series

6
Project Planning: Drywell - Guideline for using an additional oil tank for
Two different selection criteria are important when using an additional oil tank:
• Low running temperatures
• High running temperatures
Example
[1]
A
58525AXX
[1] Additional oil tank
[A] For dimension oil tank please contact SEW-EURODRIVE
Selection criteria for low running temperatures
Oil type and viscosity
Mineral
150
220
320
460
Oil type and viscosity
Synthetic PAO
150
220
320
460
Temperature limit when oil heater (+ oil tank!) must be selected
Min. permitted temperature [°C]
+5
+10
+15
+20
Temperature limit when oil heater (+ oil tank!) must be selected
Min. permitted temperature [°C]
0
+6
+12
+17
Catalog – Mixer and Agitator Drives of the MC.. Series

Project Planning: Drywell - Guideline for using an additional oil tank for
Selection table for high running temperatures
The following table shows the need for an additional oil tank. The table is based on an input speed of n
1
= 1500…1800 min
-1
.
Gear unit size
04
05
06
07
08
09
Max. motor power in kW
(n
1
= 1500 or 1800 rpm) when gear unit still without extra tank
45
55
75
75
90
110
Oil quantity without tank [l]
14
15
20
22
30
40
For higher input speeds, please contact SEW-EURODRIVE.
6
6
Catalog – Mixer and Agitator Drives of the MC.. Series

6
Motor adapters
Motor adapters [1] are available for mounting
• IEC motor sizes 132 to 315
• NEMA motor sizes 213 to 505
The connection dimensions are shown in the section "Dimension drawings for motor adapters"
chapters 10.4.2 and 11.4.2. For other motor sizes, please contact SEW-EURODRIVE.
The following figures show the basic structure of the motor adapter.
MC.PV..
[1]
[2]
[1] Motor adapter
[2] Coupling
58775AXX
Catalog – Mixer and Agitator Drives of the MC.. Series

MC.RV..
Motor adapters
6
[1] [2]
58719AXX
6
[1] Motor adapter
[2] Coupling
When selecting a motor, take into account the permitted motor weight, gear unit
design and gear unit mounting type according to the following tables:
The following applies to all tables:
G
M
= Motor weight
G
G
= Gear unit weight
The table only applies to stationary applications. For mobile applications (e.g.
travel drives), consult SEW-EURODRIVE.
Type / gear unit design
Mounting type
Foot mounted
Shaft mounted
Flange mounted
MC.PV..
G
M
≤
1.5G
G
G
M
≤
G
G
G
M
≤
G
G
MC.RV..
G
M
≤
G
G
G
M
≤
G
G
G
M
≤
0.75G
G
Catalog – Mixer and Agitator Drives of the MC.. Series

6
Motor adapters
Permitted motor mounting
Observe the center of gravity distance and the weight of the motor when mounting motors.
X
[1]
F q
[1] Center of gravity of the motor
54738AXX
These tables only apply to the following correlation of motor size/weight F q
and dimension "x".
225S
225M
250M
280S
280M
315S
315M
315L
IEC
132S
132M
160M
160L
180M
180L
200L
Motor size
365
365
405
444
445
505
505
NEMA
213/215
213/215
254/286
254/286
254/286
254/286
324 2354
2943
3237
4267
5984
6475
8142
8927
11772
F q max
[N]
579
677
1059
1275
1619
1766
433
433
485
485
555
333
348
348
395 x
[mm]
189
208
235
281
305
305
The maximum approved weight of the attached motor F q
has to be reduced in a linear manner if the center of gravity distance x is increased. F q max
cannot be increased if the center of gravity distance is reduced.
Contact SEW-EURODRIVE in the following cases:
• If you want to retrofit motor adapters with a cooling fan (not for motor sizes 132S and
132M).
Catalog – Mixer and Agitator Drives of the MC.. Series