Gearboxes

Worm Gear
Speed Reducers

HDR Series

Drives and Motors

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 HDRF133-20/1-R-56C right hand flange mount gearbox
with box size 133, mounts directly to 56C-frame
Shaft Ends motors shown smaller than actual size.
l Anti-Rust Primer Applied Inside
and Outside Gearbox
l Shaft Sleeve Protects All Shafts
l S45C Carbon Steel Shafts

Applications
l Food Processing
l Warehouse Material Handling
l Conveyors (Belt, Direct-Drive, Flange input, shaft Flange input, shaft
Inclined, etc.) output, left hand output. output, right hand output.

l Packaging Machinery (Shrink

Wrappers, Stretch Wrappers,
Case Sealers, etc.)
l Special Machinery

The HDR Series worm gear reducers are Flange input, shaft
output, double end output. Flange input, hollow bore output.
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 Shaft input, shaft Shaft input, shaft
output, right hand output. output, left hand output.
gear reducers.

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 All units filled with
mobile # SHC634
synthetic oil.

Main gear is Albc3 which is Embedded oil seals

aluminum–bronze and much One piece # Fc20 all (double lip) prevent
harder than the normally cast iron housing. leakage on both ends.
used phosphor–bronze.

Two tapered
roller bearings
on both shaft ends.
Interior channel guides
oil to directly and
constantly lube bearings.

Universally interchangeable
compact design assures Special black
you better OEM replacement paint (natural dry).
(more compatibility).

Shaft sleeves
protect all shafts.

RECOMMENDED SERVICE FACTOR (S.F.)

Average operating
hours per day
In order to select a gearbox speed Load characteristics up to 8 8 to 16 16 to 24
reducer, you will need to determine the - Uniform load and continuous operation
- No reversal 1.0 1.1 1.2
required torque and service factor for the
- Light Inertia load
application. The table to the right will assist
- Medium shock, intermittent operation
in determining the service factor. For service - Frequent start and frequent reversal 1.3 1.4 1.5
factors above 1.0, multiply the required - Medium inertia load
torque by the service factor. - Heavy shock, intermittent operation
- Frequent start and frequent reversal 1.7 1.9 2.0
Example: Review the mechanical ratings
- Heavy inertia load
table (next page): A torque requirement of
675 in. lbs. and a ratio of 20:1 (88 RPM), 1.5 HP motor. However, if the service factor this case you would select a box size
you would choose a box size 175 and it is determined to be 1.4, then your required 237 rated at 1195 in. lbs and require an
would require a 1.26 input HP, or a torque would be 1.4 x 675, or 945 lbs in. In input HP of 2.06, or a 2 HP motor.

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Mechanical Rating and Specifications
Input Speed 1750 RPM
1.0 Service Factor 1.2 Service Factor Output
Over
Shaft Backlash
Output Output Hung
Thrust (Angular

Drives and Motors

Box* Input Torque Output Input Torque Output Load
Load Minutes)
Size Ratio HP (lbs. in.) HP HP (lbs. in.) HP (%) (lbs.)
(lbs.) (ft.)
5:1 1.15 209 1.05 1.21 221 1.11 91
10:1 0.77 247 0.66 0.75 240 0.64 86
15:1 0.63 283 0.5 0.53 238 0.42 80
20:1 0.5 276 0.39 0.48 266 0.38 78
133 300 300 27
30:1 0.47 336 0.31 0.31 221 0.20 66
40:1 0.38 356 0.25 0.30 282 0.19 65
50:1 0.29 312 0.17 0.26 282 0.16 59
60:1 0.23 219 0.12 0.22 213 0.12 53

5:1 2.04 341 1.88 2.06 345 1.90 92

10:1 1.03 327 0.9 1.29 411 1.13 88
15:1 0.78 363 0.67 1.11 518 0.95 86
20:1 0.65 384 0.53 0.86 509 0.70 81
154 450 400 23
30:1 0.48 388 0.36 0.62 504 0.46 74
40:1 0.4 397 0.27 0.51 503 0.35 68
50:1 0.34 407 0.22 0.47 565 0.31 66
60:1 0.29 373 0.17 0.39 502 0.23 59

5:1 2.83 499 2.62 2.28 402 2.11 93

10:1 1.57 515 1.38 1.36 445 1.19 88
15:1 1.24 554 1.06 1.13 506 0.96 85
20:1 1.26 737 1.04 0.98 572 0.81 83
175 650 550 20
30:1 0.89 666 0.61 0.54 405 0.37 69
40:1 0.79 714 0.49 0.45 404 0.28 62
50:1 0.5 538 0.3 0.41 446 0.25 59
60:1 0.38 433 0.2 0.35 404 0.19 52

5:1 3.62 925 3.33 2.57 657 2.36 92

10:1 2.77 935 2.5 2.10 708 1.89 90
15:1 2.09 1002 1.78 1.40 673 1.20 85
20:1 1.57 914 1.29 1.17 681 0.96 82
206 700 750 17
30:1 1.65 1310 1.21 0.76 606 0.56 73
40:1 1.09 1120 0.77 0.71 726 0.50 71
50:1 0.74 830 0.46 0.54 606 0.33 62
60:1 0.6 750 0.35 0.48 606 0.28 58

5:1 4.32 766 4.02 3.56 630 3.31 93

10:1 3.47 1158 3.09 2.24 746 1.99 89
15:1 2.64 1249 2.22 1.55 732 1.30 84
20:1 2.06 1195 1.69 1.36 791 1.12 82
237 900 900 17
30:1 1.82 1507 1.39 1.02 847 0.78 76
40:1 1.45 1483 1.02 0.83 845 0.58 71
50:1 1.32 1527 0.84 0.67 779 0.43 64
60:1 0.86 1149 0.53 0.63 844 0.39 61

5:1 5.24 924 4.86 4.32 761 4.00 93

10:1 4.17 1445 3.74 3.06 1061 2.75 90
15:1 3.22 1577 2.81 2.47 1212 2.16 87
20:1 2.67 1563 2.21 1.84 1078 1.53 83
262 1000 1000 17
30:1 2.22 1827 1.68 1.30 1072 0.99 76
40:1 1.85 1919 1.32 1.11 1153 0.80 72
50:1 1.37 1658 0.92 0.95 1152 0.64 67
60:1 1.16 1670 0.77 0.94 1346 0.62 66

5:1 9.72 1724 9.06 6.93 1228 6.46 93

10:1 7.19 2419 6.46 4.63 1558 4.16 90
15:1 5.45 2611 4.65 3.19 1527 2.72 85
20:1 4.74 2875 4.07 3.31 2011 2.85 86
325 1200 1200 15
30:1 3.66 3045 2.8 2.00 1661 1.53 77
40:1 3.35 3692 2.55 1.96 2156 1.49 76
50:1 2.49 3413 1.88 1.92 2637 1.46 76
60:1 2.03 3127 1.44 1.61 2476 1.14 71

Note: Maximum input speed is 2000 RPM.

*Box size is distance between center line of input and outputs shafts.

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 mounting bases
To Order
Model No. Box size
HDRBASE133 133
HDRBASE154 154
HDRBASE175 175
HDRBASE206 206
HDRBASE237 237
HDRBASE262 262
HDRBASE325 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 350 175 120 88 58 44 35 29
HDRBASE133 shown Input Speed
smaller than actual size.
Ratio code 5/1 10/1 15/1 20/1 30/1 40/1 50/1 60/1

Mounting Base A t
d (4)

B C E

D
d1 (4)
F Dimensions: mm (in)

BOX
SIZE A B C D E F t d d1
133 82.5 (3.25) 51 (2) 84 (3.31) 111 (4.38) 106 (4.19) 137 (5.38) 0.53 11⁄ 3⁄
32 8
154 106 (4.19) 70 (2.75) 109 (4.31) 133 (5.25) 138 (5.44) 164 (6.44) 0.59 11 ⁄32 3⁄
8
175 106 (4.19) 70 (2.75) 114 (4.5) 146 (5.75) 145 (5.69) 178 (7) 0.69 13⁄ 3⁄
32 8
206 127 (5) 73 (2.88) 119 (4.69) 162 (6.38) 151 (5.94) 192 (7.55) 0.72 15⁄ 7⁄
32 16
237 127 (5) 73 (2.88) 124 (4.88) 179 (7.06) 158 (6.22) 216 (8.5) 0.75 15⁄ 7⁄
32 16
262 162 (6.38) 86 (3.38) 133 (5.25) 203 (8) 169 (6.66) 245 (9.63) 0.75 17 ⁄32 7⁄16
325 190 (7.5) 102 (4) 156 (6.13) 241 (9.5) 195 (7.66) 284 (11.19) 0.88 17⁄ 1⁄
32 2

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Gearboxes come in fixed ratio units that provide the user with Adding a 10:1 ratio gearbox will reduce the speed
speed reduction along with a mechanical advantage to increase to 175 RPM and increase the torque to 350 in. lbs. and the
torque. A 1 HP motor at 1750 RPM provides 35 in. lbs. of torque. resulting HP will remain close to 1 HP with little loss efficiency.

Worm Gear Reducers for 56C Frame Motors

Output RPM Output
Box Input ( Ratio) Torque Output Input Model No. AC Motors
Size at 1800 RPM (lbs. in.) HP HP Gear Reducer H.P. Single Phase 3-Phase
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 88 (20:1) 572 0.81 0.98 HDRF175-20/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
(1.75") 1⁄ OMT12-18-56C OMAT12-18-56C

Drives and Motors

44 (40:1) 404 0.28 0.45 HDRF175-40/1-R-56C 2
35 (50:1) 446 0.25 0.41 HDRF175-50/1-R-56C 1⁄ OMT12-18-56C OMAT12-18-56C
2
29 (60:1) 404 0.19 0.35 HDRF175-60/1-R-56C 1⁄ OMT12-18-56C OMAT12-18-56C
2
44 (40:1) 726 0.5 0.71 HDRF206-40/1-R-56C 3⁄ OMT34-18-56C OMAT34-18-56C
4
206 3⁄ OMT34-18-56C OMAT34-18-56C
(2.06") 35 (50:1) 606 0.33 0.54 HDRF206-50/1-R-56C 4
29 (60:1) 606 0.28 0.48 HDRF206-60/1-R-56C 1⁄ OMT12-18-56C OMAT12-18-56C
2
44 (40:1) 845 0.58 0.83 HDRF237-40/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
237 3⁄ OMT34-18-56C OMAT34-18-56C
35 (50:1) 779 0.43 0.67 HDRF237-50/1-R-56C 4
(2.37")
29 (60:1) 844 0.39 0.63 HDRF237-60/1-R-56C 3⁄ OMT34-18-56C OMAT34-18-56C
4
44 (40:1) 1153 0.8 1.11 HDRF262-40/1-R-56C 1.5 OMT1.5-18-56C OMAT1.5-18-56C
262
35 ( 50:1) 1152 0.64 0.95 HDRF262-50/1-R-56C 1 OMT1-18-56C OMAT1-18-56C
(2.62")
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.

To Order
Model No. Description
GEARBOX MODELS WITH FLANGE INPUT­—SHAFT OUTPUT
HDRF133-*-**-56C Gear speed reducer with box size 1.33" for 56C frame motor
HDRF154-*-**-56C Gear speed reducer with box size 1.54" for 56C frame motor
HDRF175-*-**-56C Gear speed reducer with box size 1.75" for 56C frame motor
HDRF206-*-**-56C Gear speed reducer with box size 2.06" for 56C frame motor
HDRF237-*-**-56C Gear speed reducer with box size 2.37" for 56C frame motor
HDRF262-*-**-56C Gear speed reducer with box size 2.62" for 56C frame motor
HDRF325-*-**-56C Gear speed reducer with box size 3.25" for 56C frame motor
Gearbox Models with Flange Input—Hollow Bore Output
HDRF133-*-H-56C Hollow bore gearbox with 1.33" box size
HDRF175-*-H-56C Hollow bore gearbox with 1.75" box size
HDRF206-*-H-56C Hollow bore gearbox with 2.06" box size
HDRF237-*-H-56C Hollow bore gearbox with 2.37" box size
HDRF262-*-H-56C Hollow bore gearbox with 2.62" box size
HDRF325-*-H-56C Hollow bore gearbox with 3.25" box size
Gearbox Models with Shaft Input—Shaft Output
HDRS133-*-** Shaft-to-shaft indirect drive gearbox with 1.33" box size
HDRS175-*-** Shaft-to-shaft indirect drive gearbox with 1.75" box size
HDRS206-*-** Shaft-to-shaft indirect drive gearbox with 2.06" box size
HDRS237-*-** Shaft-to-shaft indirect drive gearbox with 2.37" box size
HDRS262-*-** Shaft-to-shaft indirect drive gearbox with 2.62" box size
HDRS325-*-** 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.
HDRS133-5/1-R, 5:1 ratio, 350 RPM shaft input-shaft output gearbox with 1.33" box size.