GEARBOXES
WORM GEAR
SPEED REDUCERS
HDR Series
Starts at
$
116
l 8 Ratios Available from
5:1 to 60:1
l 7 Gear Box Sizes from
1.33 to 3.25"
l Universally Interchangeable
Design for OEM Replacement
l Double Bearings Used on Both
Shaft Ends
l Anti-Rust Primer Applied Inside
and Outside Gearbox
l Shaft Sleeve Protects All Shafts
l S45C Carbon Steel Shafts
HDRF133-20/1-R-56C right hand flange mount gearbox
with box size 133, mounts directly to 56C-frame
motors, $135, shown smaller than actual size.
Applications
l Food Processing
l Warehouse Material Handling
l Conveyors (Belt, Direct-Drive,
Inclined, etc.)
l Packaging Machinery (Shrink
Wrappers, Stretch Wrappers,
Case Sealers, etc.)
l Special Machinery
The HDR Series worm gear reducers are
used in low to moderate horsepower
applications to reduce speeds and increase
torque. Worm gear reducers are available in
direct or indirect drive, direct drive models
are 56C flange mount with either right, left
or dual output shafts or a hollow bore
output. The indirect drive models are shaft
input-shaft output boxes for use with
sprocket or pulley drive systems. They
provide an effective low cost solution to
speed reduction and increased torque, with
higher tolerances for shock loading than
helical gear reducers.
Flange input, shaft
output, left hand output.
Flange input, shaft
output, double end output.
Shaft input, shaft
output, right hand output.
D-1
Flange input, shaft
output, right hand output.
Flange input, hollow bore output.
Shaft input, shaft
output, left hand output.
All units filled with
mobile # SHC634
synthetic oil.
Main gear is Albc3 which is
aluminum–bronze and much
harder than the normally
used phosphor–bronze.
Interior channel guides
oil to directly and
constantly lube bearings.
One piece # Fc20 all
cast iron housing.
Embedded oil seals
(double lip) prevent
leakage on both ends.
Two tapered
roller bearings
on both shaft ends.
Universally interchangeable
compact design assures you
better OEM replacement
(more compatibility).
In order to select a gearbox speed reducer,
you will need to determine the required
torque and service factor for the application.
The table to the right will assist in
determining the service factor. For service
factors above 1.0, multiply the required
torque by the service factor.
Example: Review the mechanical ratings
table (next page): A torque requirement of
675 in. lbs. and a ratio of 20:1 (88 RPM),
you would choose a box size 175 and it
would require a 1.26 input HP, or a 1.5 HP
Special black
paint (natural dry).
Shaft sleeves
protect all shafts.
RECOMMENDED SERVICE FACTOR (S.F.)
AVERAGE OPERATING
HOURS PER DAY
LOAD CHARACTERISTICS Up to 8 8 to 16 16 to 24
- Uniform load and continuous operation
- No reversal
- Light Inertia load
- Medium shock, intermittent operation
- Frequent start and frequent reversal
- Medium inertia load
- Heavy shock, intermittent operation
- Frequent start and frequent reversal
- Heavy inertia load
motor. However, if the service factor is
determined to be 1.4, then your required
torque would be 1.4 x 675, or 945 lbs in. In
D-2
this case you would select a box size
237 rated at 1195 in. lbs and require an
input HP of 2.06, or a 2 HP motor.
1.0 1.1 1.2
1.3 1.4 1.5
1.7 1.9 2.0
Input Speed 1750 RPM
Box
*
Size Ratio
1.0 Service Factor 1.2 Service Factor
(%)
Over
Hung
Load
(lbs.)
Output
Shaft
Thrust
Load
(lbs.)
Backlash
(Angular
Minutes)
(ft.)
Input
HP
Output
To
rque
(lbs. in.)
OutputHPInput
HP
Output
Torque
(lbs. in.)
Output
HP
133
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
1.15
0.77
0.63
0.5
0.47
0.38
0.29
0.23
209
247
283
276
336
356
312
219
1.05
0.66
0.5
0.39
0.31
0.25
0.17
0.12
1.21
0.75
0.53
0.48
0.31
0.30
0.26
0.22
221
240
238
266
221
282
282
213
1.11
0.64
0.42
0.38
0.20
0.19
0.16
0.12
91
86
80
78
66
65
59
53
300 300 27
154
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
2.04
1.03
0.78
0.65
0.48
0.4
0.34
0.29
341
327
363
384
388
397
407
373
1.88
0.9
0.67
0.53
0.36
0.27
0.22
0.17
2.06
1.29
1.11
0.86
0.62
0.51
0.47
0.39
345
411
518
509
504
503
565
502
1.90
1.13
0.95
0.70
0.46
0.35
0.31
0.23
92
88
86
81
74
68
66
59
450 400 23
175
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
2.83
1.57
1.24
1.26
0.89
0.79
0.5
0.38
499
515
554
737
666
714
538
433
2.62
1.38
1.06
1.04
0.61
0.49
0.3
0.2
2.28
1.36
1.13
0.98
0.54
0.45
0.41
0.35
402
445
506
572
405
404
446
404
2.11
1.19
0.96
0.81
0.37
0.28
0.25
0.19
93
88
85
83
69
62
59
52
650 550 20
206
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
3.62
2.77
2.09
1.57
1.65
1.09
0.74
0.6
925
935
1002
914
1310
112 0
830
750
3.33
2.5
1.78
1.29
1.21
0.77
0.46
0.35
2.57
2.10
1.40
1.17
0.76
0.71
0.54
0.48
657
708
673
681
606
726
606
606
2.36
1.89
1.20
0.96
0.56
0.50
0.33
0.28
92
90
85
82
73
71
62
58
700 750 17
237
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
4.32
3.47
2.64
2.06
1.82
1.45
1.32
0.86
766
115 8
1249
119 5
1507
1483
1527
114 9
4.02
3.09
2.22
1.69
1.39
1.02
0.84
0.53
3.56
2.24
1.55
1.36
1.02
0.83
0.67
0.63
630
746
732
791
847
845
779
844
3.31
1.99
1.30
1.12
0.78
0.58
0.43
0.39
93
89
84
82
76
71
64
61
900 900 17
262
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
5.24
4.17
3.22
2.67
2.22
1.85
1.37
1.16
924
1445
1577
1563
1827
1919
1658
1670
4.86
3.74
2.81
2.21
1.68
1.32
0.92
0.77
4.32
3.06
2.47
1.84
1.30
1.11
0.95
0.94
761
1061
1212
1078
1072
1153
1152
1346
4.00
2.75
2.16
1.53
0.99
0.80
0.64
0.62
93
90
87
83
76
72
67
66
1000 1000 17
325
5:1
10:1
15:1
20:1
30:1
40:1
50:1
60:1
9.72
7.19
5.45
4.74
3.66
3.35
2.49
2.03
1724
2419
2611
2875
3045
3692
3413
3127
9.06
6.46
4.65
4.07
2.8
2.55
1.88
1.44
6.93
4.63
3.19
3.31
2.00
1.96
1.92
1.61
1228
1558
1527
2011
1661
2156
2637
2476
6.46
4.16
2.72
2.85
1.53
1.49
1.46
1.14
93
90
85
86
77
76
76
71
1200 1200 15
Need assistance with your selection? Call 1-888-55-OMEGA.
MECHANICAL RATING AND SPECIFICATIONS
Note: Maximum input speed is 2000 RPM.
Box size is distance between center line of input and outputs shafts.
*
D-3
A
d (4)
t
BC E
d1 (4)
D
F
HDRBASE133, $20, shown
smaller than actual size.
Mounting Base
MOUNTING BASES
To Order (Specify Model Number)
MODEL NO. PRICE BOX SIZE
HDRBASE133 $20 133
HDRBASE154 23 154
HDRBASE175 27 175
HDRBASE206 30 206
HDRBASE237 37 237
HDRBASE262 45 262
HDRBASE325 50 325
Mounting base comes complete with bolts.
RATIO 5:1 10:1 15:1 20:1 30:1 40:1 50:1 60:1
RPM @ 1750
INPUT SPEED
RATIO CODE 5/1 10/1 15/1 20/1 30/1 40/1 50/1 60/1
350 175 120 88 58 44 35 29
Dimensions: mm (in)
BOX
SIZE ABCD E Ftdd1
133 82.5 (3.25) 51 (2) 84 (3.31) 111 (4.38) 106 (4.19) 137 (5.38) 0.53
154 106 (4.19) 70 (2.75) 109 (4.31) 133 (5.25) 138 (5.44) 164 (6.44) 0.59
175 106 (4.19) 70 (2.75) 114 (4.5) 146 (5.75) 145 (5.69) 178 (7) 0.69
206 127 (5) 73 (2.88) 119 (4.69) 162 (6.38) 151 (5.94) 192 (7.55) 0.72
237 127 (5) 73 (2.88) 124 (4.88) 179 (7.06) 158 (6.22) 216 (8.5) 0.75
262 162 (6.38) 86 (3.38) 133 (5.25) 203 (8) 169 (6.66) 245 (9.63) 0.75
325 190 (7.5) 102 (4) 156 (6.13) 241 (9.5) 195 (7.66) 284 (11.19) 0.88
D-4
11
11
13
15
15
17
17
3
⁄
32
⁄
32
⁄
32
⁄
32
⁄
32
⁄
32
⁄
32
⁄
8
3
⁄
8
3
⁄
8
7
⁄
16
7
⁄
16
7
⁄
16
1
⁄
2
Gearboxes come in fixed ratio units that provide the user with
speed reduction along with a mechanical advantage to increase
torque. A 1 HP motor at 1750 RPM provides 35 in. lbs. of torque.
Adding a 10:1 ratio gearbox will reduce the speed
to 175 RPM and increase the torque to 350 in. lbs. and the
resulting HP will remain close to 1 HP with little loss efficiency.
WORM GEAR REDUCERS FOR 56C FRAME MOTORS
OUTPUT RPM OUTPUT
INPUT ( RATIO) TORQUE
BOX
SIZE
at 1800 RPM (lbs. in.)
OUTPUT INPUT
HP HP
175 (10:1) 445 1.19 1.36 HDRF175-10/1-R-56C 1.5 OMT1.5-18-56C OMAT1.5-18-56C
120 (15:1) 506 0.96 1.13 HDRF175-15/1-R-56C 1.5 OMT1.5-18-56C OMAT1.5-18-56C
175
(1.75")
88 (20:1) 572 0.81 0.98 HDRF175-20/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
44 (40:1) 404 0.28 0.45 HDRF175-40/1-R-56C
35 (50:1) 446 0.25 0.41 HDRF175-50/1-R-56C
29 (60:1) 404 0.19 0.35 HDRF175-60/1-R-56C
206
(2.06")
44 (40:1) 726 0.5 0.71 HDRF206-40/1-R-56C
35 (50:1) 606 0.33 0.54 HDRF206-50/1-R-56C
29 (60:1) 606 0.28 0.48 HDRF206-60/1-R-56C
44 (40:1) 845 0.58 0.83 HDRF237-40/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
237
(2.37")
35 (50:1) 779 0.43 0.67 HDRF237-50/1-R-56C
29 (60:1) 844 0.39 0.63 HDRF237-60/1-R-56C
262
(2.62")
44 (40:1) 1153 0.8 1.11 HDRF262-40/1-R-56C 1.5 OMT1.5-18-56C OMAT1.5-18-56C
35 ( 50:1) 1152 0.64 0.95 HDRF262-50/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
29 (60:1) 1346 0.62 0.94 HDRF262-60/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
Note: Box size is distance between center line of input shaft and center line of output shaft.
MODEL NO.
GEAR REDUCER H.P. SINGLE PHASE 3-PHASE
AC MOTORS
1
OMT12-18-56C OMAT12-18-56C
⁄
2
1
OMT12-18-56C OMAT12-18-56C
⁄
2
1
OMT12-18-56C OMAT12-18-56C
⁄
2
3
OMT34-18-56C OMAT34-18-56C
⁄
4
3
OMT34-18-56C OMAT34-18-56C
⁄
4
1
OMT12-18-56C OMAT12-18-56C
⁄
2
3
OMT34-18-56C OMAT34-18-56C
⁄
4
3
OMT34-18-56C OMAT34-18-56C
⁄
4
To Order (Specify Model Number)
MOST POPULAR MODELS HIGHLIGHTED!
MODEL NO. PRICE DESCRIPTION
GEARBOX MODELS WITH FLANGE INPUT —SHAFT OUTPUT
HDRF133-*-**-56C $135 Gear speed reducer with box size 1.33" for 56C frame motor
HDRF154-*-**-56C 148 Gear speed reducer with box size 1.54" for 56C frame motor
HDRF175-*-**-56C 163 Gear speed reducer with box size 1.75" for 56C frame motor
HDRF206-*-**-56C 207 Gear speed reducer with box size 2.06" for 56C frame motor
HDRF237-*-**-56C 249 Gear speed reducer with box size 2.37" for 56C frame motor
HDRF262-*-**-56C 268 Gear speed reducer with box size 2.62" for 56C frame motor
HDRF325-*-**-56C 379 Gear speed reducer with box size 3.25" for 56C frame motor
GEARBOX MODELS WITH FLANGE INPUT—HOLLOW BORE OUTPUT
HDRF133-*-H-56C $182 Hollow bore gearbox with 1.33" box size
HDRF175-*-H-56C 215 Hollow bore gearbox with 1.75" box size
HDRF206-*-H-56C 258 Hollow bore gearbox with 2.06" box size
HDRF237-*-H-56C 295 Hollow bore gearbox with 2.37" box size
HDRF262-*-H-56C 363 Hollow bore gearbox with 2.62" box size
HDRF325-*-H-56C 504 Hollow bore gearbox with 3.25" box size
GEARBOX MODELS WITH SHAFT INPUT—SHAFT OUTPUT
HDRS133-*-** $116 Shaft-to-shaft indirect drive gearbox with 1.33" box size
HDRS175-*-** 140 Shaft-to-shaft indirect drive gearbox with 1.75" box size
HDRS206-*-** 168 Shaft-to-shaft indirect drive gearbox with 2.06" box size
HDRS237-*-** 193 Shaft-to-shaft indirect drive gearbox with 2.37" box size
HDRS262-*-** 237 Shaft-to-shaft indirect drive gearbox with 2.62" box size
HDRS325-*-** 333 Shaft-to-shaft indirect drive gearbox with 3.25" box size
Insert ratio code into model number, see chart on previous page for ratio codes; “5/1”, “10/1”, “15/1”, “20/1”, “30/1”, “40/1”, “50/1”, “60/1”.
*
For right hand shaft insert “R”, for left hand shaft “L”, or for double end shaft “DE” (dual shaft not available on shaft-to-shaft models).
**
Order Examples: HDRF154-15/1-R-56C, for 15:1 ratio right hand flange mount gearbox, with a 1.54" box size, $148.
HDRS133-5/1-R, 5:1 ratio, 350 RPM shaft input-shaft output gearbox with 1.33" box size, $116.
D-5
One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | info@omega.com
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