Constant Speed Gear Reducers R/F/K/S
Gear Units with Input Options
6. Gear Units with Input Options
6.1. AD input shaft assembly
Helical gear unit with AD input shaft assembly
SEW Helical, parallel shaft helical, helical-bevel and helical-worm gear units are equipped with an input shaft assembly. The input
shafts have inch dimensions. Metric dimensions are provided on request. The end of the input shaft has a tapped hole to aid in
mounting drive components.
The bearings of the input shaft are lubricated by grease. Natural Buna Rubber oil seals and o-ring seals are used for sealing
the cover. The rugged bearings of the input shaft permit high overhung loads. Consult your SEW assembly facility if oil bath
lubricated bearings are required.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
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AD input shaft assembly
Gear Units with Input Options
Constant Speed Gear Reducers R/F/K/S
Selection of the gear unit
Define the gear unit type
↓
Determine gear unit size based on
• Maximum output torque (Ta max)
• Gear unit reduction ratio (i)
in the selection tables with AD input shaft assembly
↓
Check the maximum permitted overhung load value on the output (FRa)
↓
Check the maximum permitted input torque at the gear unit (Pe)
with regard to the thermal limit power (see page 41)
↓
Check the overhung load at the input (FRe)
↓
Please contact SEW if the requirements are more demanding
(e.g. higher overhung load on the input end).
Available AD Input Assemblies and Ratings
Gear Unit Information
Ratio
i
135.09
123.91
105.49
90.96
84.78
74.11
69.47
61.30
55.87
48.17
44.90
Output
Speed
na
rpm
13
14
17
19
21
24
25
29
31
36
39
45
R27
Input
Power
Pemax
HP
0.25
0.28
0.33
0.39
0.41
0.47
0.49
0.56
0.60
0.70
Output
Torque
Tamax
lb-in
1150
1150
1150
1150
1150
1150
1150
1150
1150
Stages
Pri. Sec.
3
3
3
3
3
3
3
3
3
3
-
Input
Power
Pe
HP
0.29
0.32
0.36
0.41
0.44
0.49
0.53
0.60
0.64
AD3
Input OHL Output
Torque
FRe
Ta
lb
lb-in
155
155
154
153
153
151
150
1150
1150
1150
1150
1150
1150
1150
1150
1150
Output
OHL
FRa
lb
Input
Power
Pe
HP
950
950
950
950
930
880
860
820
790
745
725
690
0.32
0.33
0.39
0.44
0.47
0.52
0.55
0.61
0.67
0.76
0.80
0.92
AD4
Input OHL Output
Torque
FRe
Ta
lb
lb-in
382
382
382
380
380
380
378
378
367
Output
OHL
FRa
lb
1150
1150
1150
1150
1150
1150
1150
1150
1150
Selection Table Example
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
AD input shaft assembly
38
950
950
950
950
930
880
860
820
790
745
725
690
Constant Speed Gear Reducers R/F/K/S
Gear Units with Input Options
Centering shoulder AD../ZR
The input shaft housing can be configured with a centering shoulder as an option for use when mounting a motor scoop.
Contact your SEW-Eurodrive facility for additional information.
AD../RS backstop
The input shaft assembly can be configured with a backstop if the application only requires one direction of rotation.
Backstops with centrifugally disengaging wedge elements are used. This design offers the advantage that, above a certain
speed (lift-off speed), the wedge elements lift off the contacting surface and rotate with the shaft. As a result, the backstops
operate with no wear or power loss. They are maintenance-free and can be used at high speeds.
Dimensions:
The backstop is completely integrated within the input cover. There is no difference in dimensions between an input shaft
assembly with or without a backstop.
Locking torques:
Type
AD2/RS
AD3/RS
AD4/RS
AD5/RS
AD6/RS
AD7/RS
AD8/RS
Maximum locking torque of backstop
lb-in
Nm
795
3010
6200
10620
12830
12830
25310
Lift-off speed
rpm
90
340
700
1200
1450
1450
2860
640
600
550
630
430
430
430
Specify output direction of rotation when ordering
When you order a gear unit with an input shaft assembly and backstop, the required direction of rotation of the output shaft
must be specified. The direction of rotation is specified as viewed from the output shaft of the gear unit. For drives with shaft
extensions at ends A and B, the direction of rotation must be specified as viewed from end A.
Caution:
To avoid damage, the direction of rotation of the drive must be checked before
starting up the machine.
B
CCW
A
CW
CW
CCW
Specify output direction of rotation when ordering
CCW - Counterclockwise
CW - Clockwise
39
AD input shaft assembly
Gear Units with Input Options
Constant Speed Gear Reducers R/F/K/S
AD.. /P motor mounting platform
Belt drives can be set up in a compact configuration using an adjustable motor mounting platform. The motor mounting
platform is arranged in parallel to the input shaft . The distance from the input shaft can be adjusted using threaded columns.
Helical gear unit with input shaft assembly and AD../P motor mounting platform
The available gear unit / motor combinations for input shaft assemblies with motor mounting platforms can be found in the
corresponding dimension sheets.
•
•
•
•
R gear unit → page 287
F gear unit → page 451
K gear unit → page 627
S gear unit → page 726
Additional weights for AD../P
Motor type
IEC
NEMA
DT71
56C
DT80
143T
DT90
145T
DT100
182T/184T
DV112
DV132
213T/215T
DV160
254T/256T
DV180
284T/286T
DV 200
324T
DV 225
326T/364T
DV 250
365T
DV 280
404T
AD2/P
AD3/P
Additional weight in lb
AD4/P
AD5/P
AD6/P
AD7/P
12.13
12.13
12.13
24.26
24.26
24.26
50.72
90.41
90.41
136.71
136.71
227.12
227.12
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
AD input shaft assembly
40
Constant Speed Gear Reducers R/F/K/S
Gear Units with Input Options
Thermal limit power for gear units with input shaft assembly
The power values given in the selection tables for gear units with input shaft assemblies are mechanical limit powers.
However, gear units may become thermally overloaded before they reach the mechanical power limit. This depends on the
mounting position. For mineral oils, corresponding cases are indicated in the selection tables by having the mounting position
specified.
Please contact SEW if the mounting position you require is the same as one of those indicated. By considering the actual
operating conditions, it will then be possible to recalculate the thermal limit power based on the specific application.
Alternatively, suitable measures can be taken (e.g. using a synthetic lubricant with higher thermal stability) to increase the
thermal limit power of the gear unit. The following data is required for the evaluation:
Gear unit type …………………
Output speed (na) ………………… rpm
Gear ratio i ………………
Ambient temperature ……………… °C
*Cyclic duration factor cdf …………%
Power drawn (P) …………………… kW
Installation location: ……………………………………………………………………………
...in small, enclosed rooms
...in large rooms, halls
...in the open
Installation situation: …………………………………………………………………………
e.g. steel foundation, concrete foundation
* Cyclic duration factor =
run time under load min / hr.
60
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
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AD input shaft assembly