SPECIFICATION
HOW TO ORDER
QUANTIS
THE DODGE MSM Speed Reducer is suitable for C-face,
separate, or integral gearmotor construction in shaftmount, foot, or output flange mountings, and available i
double or triple ratios.
service life.
Reducer housings and covers are constructed of corrosion
Reducer bearings can be the roller or ball type and provide
resistant, class 30 gray iron with cast internal ribbing for
a minimum 10,000 hour average life. All seals are of the
added strength. All housings are cast while some covers
spring loaded type, made of nitrile rubber.
are cast and others are steel. All housings are precision
Reducer gears and bearings are splash lubricated using an
machined to assure accurate alignment for all gear sets.
ISO 220 lubricant which provides protection against rust.
Gearing is of single helical design, and ground to provide
The lubricant allows an operating temperature range of
an ellipsoid tooth form which eliminates tooth wearing and
+10°C to +40°C (+50°F to 104°F) ambient.
assures meshing in the strongest tooth area. All gears are
C-face reducers are of the coupling type or clamp collar
case carburized to insure a high surface durability and resil-
design so as to eliminate or minimize fretting corrosion
ient tooth core for greater impact resistance and longer
between the motor shaft and the reducer stub shaft.
The input pinion has a shank pinion design that is assembled by being pressed into place.
HOW TO ORDER QUANTIS
MSM Reducers and Gearmotors have catalog numbers assigned that can be found on the selection pages. Refer to the
catalog number when ordering. Always specify:
•
•
•
•
•
•
•
Mounting positio
Specify flange mounting, if applicable
Accessories/Modifications, if require
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
Ratio
Output Shaft Dimension
Input speed
Input power
SELECTION
PAGE 14
4
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
QUANTIS
Step 1: For applications with one start/hour or less and constant load skip Step 2 and proceed to Step 3. For application
with more than one start/hour proceed to Step 2. For pulsating (cyclic) loads contact Application Engineering.
Step 2: Determine mass acceleration factor.
all exterior moments of inertia
Mass Acceleration Factor =
moment of inertia of drive motor
Where:
Drive Motor Inertia must be provided by the motor manufacturer. On MSM gearmotors, driving inertia is available from your
DODGE Sales Engineer or Application Engineering.
Exterior moments of Inertia are defined as the “load inertia” referred to the motor speed. The “load inertia” must be provided by the driven machine manufacturer. For assistance contact Application Engineering or see the following formulas.
Exterior Moment of Inertia (Rotating) = Load Inertia x
Exterior Moment of Inertia (Linear) = W x
(
Load RPM
Motor RPM
V
6.28N
(
)
)
2
2
Where:
W = Weight (lbs)
V = Linear Velocity (Ft./Min.)
N = Motor RPM
If these values are unobtainable, proceed to Step 3. If
application assistance is required, contact Application
Engineering.
Note: Gearbox inertias, not addressed above, are typically negligible. If required, inertia values for the MSM unit may be
obtained from your DODGE Sales Engineer or Application Engineering.
Step 3: With inertia ratio determined, use Chart 1 to select load classification.
Chart 1 Load Classification
Load Classification
Driven Machine
Mass acceleration factor ≤ 0.3:
I
Light shocks
Generators, belt conveyors, platform conveyors, auxiliary machine tool drives, turbo blowers, turbo
compressors, agitator and mixers for light uniform density materials
Mass acceleration factor ≤ 3:
II Moderate shocks
Main machine tool drives slewing gear, cranes, inducted draught fans, mixer and agitator for materials
with variable density, multi cylinder piston pumps, metering pumps
Mass acceleration factor ≤ 10:
III Heavy shocks
Punch presses, shears, Banbury mixers, rolling mill and foundry drives, bucket dredger, heavy centrifugal drives, heavy metering pumps, rotary drilling equipment, briquet presses, pug mills
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
SELECTION
PAGE 14
5
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
QUANTIS
Step 4: Service Factor
The listed service factors apply only when electric motors are used as prime motors. Service factors listed in Chart 2 are for
general industrial applications. It is recommended that the Application Worksheet on page 289 be completed and sent to
Application Engineering when any of the following conditions are expected.
•
Instantaneous loads exceed 200% of the reducer
•
Reversing loads
ratings
•
Temperature variations
•
Frequent or cyclical speed changes
•
Prime movers other than electric motors
•
Heavy shock loads
•
Other questionable conditions
Chart 2 Service Factor
DailyOperation
Starts/hour
Load
Classification
I
II
III
<10
4 Hours
10-200
>200
<10
8 Hours
10-200
0.80
1.00
1.30
0.90
1.10
1.40
1.00
1.30
1.50
0.90
1.10
1.40
1.00
1.20
1.50
>200
1.10
1.30
1.60
<10
1.00
1.20
1.50
16 Hours
10-200
1.10
1.40
1.60
>200
1.20
1.50
1.70
<10
1.20
1.40
1.60
24 Hours
10-200
1.30
1.50
1.70
>200
1.50
1.60
1.80
Step 5: Reducer Selection
Using the service factor obtained in Step 4, calculate the equivalent HP by multiplying the demand HP to be transmitted by
the service factor. The electric motor nameplate rating should be used for the demand HP.
Equivalent HP = Demand HP x Service Factor
Step 6:
Reducer selection:
From rating tables in this catalog make reducer selection based on input RPM, ratio, and equivalent HP.
Gearmotor selection: From rating tables in this catalog make gearmotor selection based on output RPM, demand HP,
and service factor. This will indicate gearcase size, motor frame size, output torque, and output
OHL capacity.
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
SELECTION
PAGE 14
6
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
QUANTIS
Step 7: Check overhung loads by using the following formula:
OHL =
Where:
126,000 x HP x Fc
PD x RPM
OHL
=
Overhung load (lbs)
HP
=
Demand Horsepower
Fc
=
Load Connection Factor
Chain Drive: Fc = 1.00
Synchronous Belt Drive: Fc = 1.10
Spur or Helical Gear: Fc = 1.25
V-Belt Drive: Fc = 1.50
Flat Belt: Fc = 2.50
PD
=
Pitch Diameter (inches)
RPM
=
Revolutions per Minute (output)
The calculated OHL must be less than the allowable OHL as shown in catalog on page.
To minimize overhung load and increase bearing life, the load centerline should be located as close to the shaft shoulder as
possible. For applications where OHL exceeds catalogued values use the reducer selection tables to select the next largest
size gearcase or contact Application Engineering.
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
SELECTION
PAGE 14
7
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
SOLID OUTPUT SHAFT WITH STANDARD BEARING - MSM GEARMOTORS AND REDUCERS
Permissible Overhung Loads at Service Factor SF = 1.0
1. Calculation based on bearing life
y
z+x
Fx perm. 1 = F R perm
2. Calculation based on mechanical strength
[lb f]
F x perm. 2 =
a
x
[lbf]
The lower value Fx perm. of the two calculation results is the permissible overhung load. If values on tables are not sufficient for requirement,
please consult Application Engineering, stating load direction.
NOTE: The allowable overhung loads in the table above were calculated for the maximum output torque condition. Higher allowable overhung loads are
often possible for many applications. Please contact Application Engineering for application specific overhund load calculations.
FR perm. in (lbf) for x=u for output speeds n2 in RPM
a
v
u
n2 ≤ 16
*
Lb-in /
in/mm
in/mm
in/mm
in/mm
kNmm
2508
ccw
4.80
3.82
947
1.000
1.97
MW38
1720
122
97
107
25
50
cw
2292
(2/3)
5.20
3.82
1328
1.375
2.76
ccw
1589
132
97
150
35
70
cw
3554
5.94
4.76
1575
1.250
2.36
ccw
MW48
2466
151
121
178
30
60
cw
3330
(2/3)
6.34
4.76
2098
1.625
3.15
ccw
2311
161
121
237
40
80
cw
8104
7.48
5.91
3939
1.625
3.15
ccw
MW68
6480
190
150
445
cw
40
80
7308
(2/3)
7.87
5.91
4549
2.000
3.94
ccw
6122
200
150
514
50
100
cw
13366
8.86
6.89
7107
2.000
3.94
ccw
MW88
11084
225
175
803
cw
50
100
12167
(2/3)
9.65
6.89
9949
2.750
5.51
ccw
10106
245
175
1124
70
140
cw
16860
10.31
7.95
12834
ccw
2.375
4.72
MW108
13134
262
202
1450
cw
60
120
15584
(2/3)
11.1
7.95
17109
3.188
6.69
ccw
12127
282
202
1933
80
170
cw
27975
12.99
10.24
18676
ccw
2.875
5.51
MW128
21979
330
260
2110
70
140
cw
26267
(2/3)
13.78
10.24
24013
3.625
6.69
ccw
20642
350
260
2713
90
170
cw
28476
15.67
12.13
40670
ccw
3.625
6.69
MW148
21163
398
308
4595
90
170
cw
27707
(2/3)
16.06
12.13
40759
4.000
8.27
ccw
20605
408
308
4605
100
210
cw
42430
18.56
14.23
87625
4.375
8.27
ccw
MW168
33029
472
362
9900
110
210
cw
41456
(2/3)
18.98
14.23
63656
4.750
8.27
ccw
32287
482
362
7192
120
210
cw
*Direction of rotation with view on output shaft. To convert lbf to Newtons (N), multiply by 4.448
Bold - standard shaft
cw - clockwise
ccw - counter clockwise
Type Stages
y
z
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
n2 ≤ 25
n2 ≤ 40
n2 ≤ 63
n2 ≤ 100
n2 ≤ 160
n2 ≤ 250
n2 ≤ 263
2203
1414
2008
1306
3123
2033
2925
1905
7158
5546
6767
5237
11792
9522
10762
8679
14953
11179
13771
10321
24731
18726
23211
17590
25250
17937
24560
17462
37507
28157
36633
27522
1922
1137
1757
1055
2726
1643
2554
1541
6303
4676
5959
4417
10348
8088
9443
7372
13128
9404
12140
8679
21737
15758
20436
14810
22233
14950
21676
14556
32961
23685
32239
23154
1690
906
1543
845
2359
1393
2210
1306
5571
3951
5264
3733
9143
6867
8331
6258
11640
7907
10734
7289
19230
13273
18063
12480
19713
12456
19195
12125
29178
19910
28540
19453
1486
706
1359
661
2058
1135
1931
1063
4923
3310
4649
3127
7992
5923
7280
5396
10295
6570
9502
6064
16717
11640
15695
10935
16803
11519
16369
11209
25137
17897
24536
17499
1219
704
1111
653
1676
1098
1573
1030
4157
3083
3926
2913
6751
5465
6161
4979
8637
6263
7981
5779
14092
10886
13214
10227
14154
10832
13799
10533
21159
16653
20722
16281
1011
678
923
626
1395
1025
1309
961
3551
2859
3349
2701
5797
4966
5283
4527
7362
5826
6795
5385
12044
10005
11321
9398
12113
9964
11799
9699
18171
15239
17728
14896
990
673
904
622
1368
1015
1284
952
3484
2831
3297
2674
5698
4911
5201
4474
7220
5774
6665
5328
11826
9897
11113
9297
11905
9860
11574
9600
17833
15070
17433
14732
SELECTION
PAGE 14
8
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
HOLLOW OUTPUT SHAFT WITH STANDARD BEARING - MSM GEARMOTORS AND REDUCERS
Permissible Overhung Loads at Service Factor SF = 1.0
(Drawing shows customer
supplied plug-in output shaft)
1. Calculation based on bearing life
y
Fx perm. 1 = F R perm ---------- [lbf]
z+x
2. Calculation based on mechanical strength
F x perm. 2 = a-- [lbf]
x
The lower value Fx perm. of the two calculation results is the permissible overhung load. If values on tables are not sufficient for requirement, pleaseconsult
Application Engineering, stating load direction.
NOTE: The allowable overhung loads in the table above were calculated for the maximum output torque condition. Higher allowable overhung loads are
often possible for many applications. Please contact Application Engineering for application specific overhund load calculations.
FR perm. in (lbf) for x=u for output speeds n2 in RPM
a
u
v
n2 ≤ 16
n2 ≤ 25
n2 ≤ 40
n2 ≤ 63
n2 ≤ 100
*
Lb-in /
in/mm
in/mm
in/mm
in/mm
kNmm
MW38
2380
2091
1823
1605
1412
5.07
3.82
**
1.250
2.36
ccw
1633
1340
1078
860
670
(2/3)
128.75
97
**
30
60
cw
MW48
3439
3021
2640
2285
1990
6.14
4.76
**
1.375
2.76
ccw
2390
1968
1593
1348
1099
2/3)
156
121
**
35
70
cw
4079
3586
3075
2764
2436
7.41
5.91
**
1.5
3.15
ccw
MW68
2448
1961
1522
1157
841
188
150
**
40
80
cw
4125
3622
3171
2789
2453
(2/3)
7.34
5.91
**
1.4375
3.54
ccw
2467
1978
1535
1167
848
187
150
**
45
90
cw
6268
5504
4813
4246
3673
8.89
6.89
**
ccw
2.000
3.94
MW88
3820
3072
2393
1833
1485
226
175
**
cw
50
100
6203
5543
4854
4276
3696
(2/3)
8.83
6.89
**
1.9375
4.72
ccw
3844
3093
2409
1846
1496
224
175
**
60
120
cw
8249
7271
6375
5626
4943
10.33
7.95
**
2.375
4.72
ccw
MW108
4293
3337
2469
1750
1122
262
202
**
60
120
cw
8200
7222
6329
5581
4914
(2/3)
10.39
7.95
**
2.4375
5.51
ccw
4267
3311
2455
1739
1116
264
202
**
70
140
cw
11771
10369
9115
8054
6883
12.99
10.24
**
2.750
5.51
ccw
MW128
5703
4363
3154
2150
1873
330
260
**
70
140
cw
(2/3)
11573
10242
8991
7931
6784
13.17
10.24
**
2.9375
6.69
ccw
5622
4302
3110
2119
1846
335
260
**
80
170
cw
12387
10934
9608
8455
7051
15.75
12.13
**
ccw
3.625
6.69
MW148
4934
3559
2309
1277
1743
400
308
**
cw
80
170
12537
11080
9720
8553
7152
(2/3)
15.56
12.13
**
3.4375
6.69
ccw
4993
3602
2341
1293
1764
395
308
**
90
170
cw
18281
16147
14164
12516
10525
18.23
14.23
**
4.000
8.27
ccw
MW168
8654
6580
4700
3143
3213
463
362
**
100
210
cw
18343
16204
14210
12557
10560
(2/3)
18.17
14.23
**
3.9375
8.27
ccw
8682
6601
4715
3154
3223
462
362
**
110
210
cw
*Direction of rotation with view on output shaft. To convert lbf to Newtons (N), multiply by 4.448
** Customer to provide plug in shaft design
Bold - standard shaft
cw - clockwise
ccw - counter clockwise
Type
Stages
y
z
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
SELECTION
PAGE 14
9
n2 ≤ 160
n2 ≤ 250
n2 ≤ 263
1156
666
1623
1063
1996
923
2013
931
2991
1604
3011
1616
4025
1538
4003
1529
5574
2379
5498
2345
5733
2336
5796
2364
8550
3889
8576
3902
957
643
1352
992
1645
954
1662
962
2481
1583
2498
1594
3311
1699
3293
1689
4596
2520
4525
2484
4727
2519
4778
2550
7059
4032
7081
4046
938
639
1323
983
1611
952
1623
960
2425
1576
2441
1587
3240
1705
3222
1695
4489
2521
4428
2486
4629
2524
4681
2555
6902
4029
6935
4042
DIMENSIONS/WEIGHTS
PAGE 106
SPECIFICATION
HOW TO ORDER
HOLLOW OUTPUT SHAFT WITH HEAVY DUTY BEARINGS - MSM GEARMOTORS AND REDUCERS
Permissible Overhung Loads at Service Factor SF = 1.0
(Drawing shows customer
supplied plug-in output shaft)
1. Calculation based on bearing life
y
Fx perm. 1 = F R perm ---------z + x [lbf]
2. Calculation based on mechanical strength
F x perm. 2 = a-- [lbf]
x
The lower value Fx perm. of the two calculation results is the permissible overhung load. If values on tables are not sufficient for requirement, pleaseconsult
Application Engineering, stating load direction.
NOTE: The allowable overhung loads in the table above were calculated for the maximum output torque condition. Higher allowable overhung loads are
often possible for many applications. Please contact Application Engineering for application specific overhund load calculations.
FR perm. in (lbf) for x=u for output speeds n2 in RPM
Type Stages
y
in/mm
z
in/mm
a
Lb-in /
kNmm
u
v
in/mm
in/mm
*
n2 ≤ 16
n2 ≤ 25
n2 ≤ 40
n2 ≤ 63
n2 ≤ 100
n2 ≤ 160
n2 ≤ 250
n2 ≤ 263
4208
3117
4241
3146
6735
5445
6783
5484
8630
6252
8582
6211
14096
10891
13858
10727
14071
10757
14265
10909
21601
16984
21688
17047
3585
2891
3624
2918
5773
4946
5814
4985
7352
5821
7302
5783
12048
10009
11865
9860
12042
9908
12208
10035
18524
15540
18592
15600
3518
2862
3558
2889
5684
4893
5726
4927
7210
5766
7161
5727
11829
9901
11662
9752
11834
9805
11998
9931
18216
15369
18285
15428
MW38
NO HEAVY DUTY OPTION
(2/3)
MW48
NO HEAVY DUTY OPTION
(2/3)
8206
7.41
5.91
**
1.5
3.15
ccw
6554
188
150
**
40
80
cw
(2/3)
8281
7.34
5.91
**
1.4375
3.54
ccw
6613
187
150
**
45
90
cw
13312
8.89
6.89
**
ccw
2.000
3.94
MW88
11041
226
175
**
cw
50
100
13429
(2/3)
8.83
6.89
**
1.9375
4.72
ccw
11126
224
175
**
60
120
cw
16839
10.33
7.95
**
2.375
4.72
ccw
MW108
13116
262
202
**
60
120
cw
16733
(2/3)
10.39
7.95
**
2.4375
5.51
ccw
13034
264
202
**
70
140
cw
27987
12.99
10.24
**
2.750
5.51
ccw
MW128
21968
330
260
**
70
140
cw
(2/3)
27552
13.17
10.24
**
2.9375
6.69
ccw
21633
335
260
**
80
170
cw
28310
15.75
12.13
**
ccw
3.625
6.69
MW148
21043
400
308
**
cw
80
170
28691
(2/3)
15.56
12.13
**
3.4375
6.69
ccw
21320
395
308
**
90
170
cw
43258
18.23
14.23
**
4.000
8.27
ccw
MW168
33732
463
362
**
100
210
cw
43368
(2/3)
18.17
14.23
**
3.9375
8.27
ccw
33855
462
362
**
110
210
cw
*Direction of rotation with view on output shaft. To convert lbf to Newtons (N), multiply by 4.448
Bold - standard shaft
cw - clockwise
ccw - counter clockwise
MW68
FEATURES/BENEFITS
PAGE 2
NOMENCLATURE
PAGE 11
7241
6370
5630
4972
5607
4735
3995
3347
7317
6436
5690
5017
5656
4778
4032
3377
11752
10312
9099
7951
9484
8058
6841
5902
11838
10381
9179
8030
9555
8117
6905
5946
14908
13115
11603
10291
11167
9391
7898
6562
14794
13034
11532
10215
11097
9330
7846
6520
24739
21743
19240
16722
18739
15768
13280
11643
24328
21414
18936
16476
18469
15532
13084
11469
25104
22099
19628
16740
17835
14869
12385
11444
25444
22401
19867
16934
18069
15061
12549
11604
38235
33618
29781
25603
28711
24153
20322
18248
38330
33796
29888
25704
28821
24244
20370
18319
** Customer to provide plug in shaft design
SELECTION
PAGE 14
10
DIMENSIONS/WEIGHTS
PAGE 106