|  |  | Worm Gear Speed Reducers below 1/2 horsepower  
    
        | HP | RATIO | DESCRIPTION | QTY | Input
        shaft | Output |  
        | 0 | 0 | FOOTE-BROTHERS:
        6T | 2 | 1-1/2" | 2-3/4" |  
        | 0 | 0 | D.O.
        JAMES: 120H | 1 | " | " |  
        | 0 | 116.7 | JERVIS-WEBB:
        B/300/62 | 1 | " | " |  
        | 0 | 0 | CONE-DRIVE:
        SO-51815C-AJC | 1 | 1-3/16" | 1-7/8" |  
        | 0.02 | 3600 | ABART:
        300-DW | 2 | 3/4" | 1-1/2" |  
        | 0.04 | 200 | OHIO:
        VOT-A | 3 | 1/2" | 1/2" |  
        | 0.06 | 456 | ABART:
        225-DW | 1 | 5/8" | 1" |  
        | 0.07 | 672 | WINSMITH:
        3DBI | 1 | 5/8" | 1" |  
        | 0.07 | 2000 | OHIO:
        DHS1-E | 1 | 5/8" | 1" |  
        | 0.08 | 4 | OHIO: DOX | 1 | 1/2" | 1/2" |  
        | 0.08 | 600 | BOSTON:
        TW113A | 1 | 1/2" | 5/8" |  
        | 0.09 | 600 | WINSMITH:
        4DBI | 3 | 3/4" | 1" |  
        | 0.1 | 740 | ABART:
        300-DW | 3 | 3/4" | 1-1/2" |  
        | 0.1 | 2000 | WINSMITH:
        4DB | 1 | 1/2" | 1" |  
        | 0.12 | 50 | OHIO:
        DOT/DOX | 7 | 1/2" | 1/2" |  
        | 0.12 | 80 | BOSTON:
        BA | 1 | 1/2" | 3/4" |  
        | 0.12 | 80 | BOSTON:
        TA80 | 1 | 1/2" | 3/4" |  
        | 0.13 | 58 | BOSTON:
        AD  | 4 | 1/2" | 5/8" |  
        | 0.14 | 2000 | PHILADELPHIA:
        250/325 DAT | 1 | 3/4" | 1-7/16" |  
        | 0.15 | 30 | OHIO: DOX | 1 | 1/2" | 1/2" |  
        | 0.15 | 300 | GROVE:
        DU-175 | 1 | 1/2" | 7/8" |  
        | 0.16 | 10 | OHIO:
        VOT-10A | 1 | 1/2" | 1/2" |  
        | 0.16 | 36 | OHIO: DOX | 1 | 1/2" | 1/2" |  
        | 0.16 | 43 | PERFECTION:
        1/6hp CO-RPM: 43.75 | 1 | " | " |  
        | 0.16 | 60 | OHIO:
        B133 | 7 | 1/2" | 5/8" |  
        | 0.16 | 75 | BOSTON:
        LD 300 | 1 | 1/2" | 7/8" |  
        | 0.16 | 600 | MORSE:
        25W-DB | 1 | 5/8" | 1-1/4" |  
        | 0.17 | 50 | OHIO:
        B133 | 9 | 1/2" | 5/8" |  
        | 0.17 | 99 | D.O.
        JAMES: 27H | 1 | 5/8" | 3/4" |  
        | 0.18 | 40 | BOSTON:
        U113 | 1 | 1/2" | 5/8" |  
        | 0.18 | 48 | BOSTON:
        U48 | 1 | 5/8" | 7/8" |  
        | 0.18 | 50 | BOSTON:
        T115 | 1 | 5/8" | 3/4" |  
        | 0.2 | 1 | BOSTON:
        WC321-300 | 1 | 1/2" | 1" |  
        | 0.21 | 2000 | LINK-BELT:
        DWB50 | 1 | 3/4" | 1-7/8" |  
        | 0.22 | 200 | MORSE:
        20W-DB | 1 | 1/2" | 1" |  
        | 0.23 | 40 | OHIO:
        B133 | 7 | 1/2" | 5/8" |  
        | 0.23 | 50 | BOSTON:
        UNKNOWN | 4 | 1/2" | 1/2" |  
        | 0.23 | 50 | BOSTON:
        LB (LW13) | 6 | 1/2" | 1/2" |  
        | 0.23 | 58 | BOSTON:
        T20 | 1 | 5/8" | 3/4" |  
        | 0.24 | 1200 | GROVE:
        DU-325 | 2 | 5/8" | 1-1/2" |  
        | 0.25 | 16 | EBERHARDT-DENVER:
        13L-DB | 1 | 1/2" | 5/8" |  
        | 0.25 | 19 | BOSTON:
        TA2G | 2 | 1/2" | 3/4" |  
        | 0.25 | 30 | OHIO:
        BHU-A | 1 | 1/2" | 1/2" |  
        | 0.25 | 30 | OHIO:
        BHU-A | 1 | 1/2" | 1/2" |  
        | 0.25 | 40 | PERFECTION:
        ST1840-B | 1 | 1/2" | 3/4" |  
        | 0.25 | 40 | AMERICAN:
        206 (PERFECTION?) | 1 | 5/8" | 7/8" |  
        | 0.25 | 48 | EBERHARDT-DENVER:
        2L1SPT | 1 | 5/8" | 7/8" |  
        | 0.25 | 50 | BOSTON:
        715-50-J | 1 | 5/8" | 3/4" |  
        | 0.25 | 50 | BOSTON:
        TA50 | 2 | 1/2" | 3/4" |  
        | 0.25 | 50 | BOSTON:
        TA50 | 1 | 1/2" | 3/4" |  
        | 0.25 | 63 | D.O.
        JAMES: 22S | 1 | 5/8" | 7/8" |  
        | 0.25 | 80 | BOSTON:
        UE80 | 1 | 3/4" | 1" |  
        | 0.25 | 81 | D.O.
        JAMES: 31 | 1 | 5/8" | 1-3/16" |  
        | 0.25 | 145 | EBERHARDT-DENVER:
        21L-DV | 1 | 1/2" | 5/8" |  
        | 0.25 | 800 | GRANT:
        DWV-258 | 1 | 1/2" | 1" |  
        | 0.25 | 2500 | CLEVELAND:
        025-D | 1 | 7/8" | 1-5/8" |  
        | 0.26 | 40 | BOSTON:
        U118 | 2 | 5/8" | 7/8" |  
        | 0.27 | 25 | BOSTON:
        LB (LW13) | 3 | 1/2" | 1/2" |  
        | 0.27 | 60 | PERFECTION:
        SB2160-B | 1 | 5/8" | 7/8" |  
        | 0.28 | 40 | OHIO:
        U-18-MC | 1 | 56C | 3/4" |  
        | 0.28 | 60 | OHIO:
        B175 | 4 | 5/8" | 7/8" |  
        | 0.28 | 60 | HUB CITY:
        181 | 41 | 1/2" | 3/4" |  
        | 0.28 | 60 | OHIO:
        B175 | 1 | 5/8" | 7/8" |  
        | 0.28 | 60 | OHIO:
        B175 | 4 | 5/8" | 7/8" |  
        | 0.29 | 54 | D.O.
        JAMES: 27HT | 1 | 1/2" | 7/8" |  
        | 0.29 | 54 | D.O.
        JAMES: 27HT | 1 | 1/2" | 3/4" |  
        | 0.3 | 50 | BOSTON:
        U118 | 1 | 5/8" | 3/4" |  
        | 0.3 | 50 | BOSTON:
        U118 | 1 | " | " |  
        | 0.3 | 900 | GROVE:
        DU-325 | 1 | 5/8" | 1-1/2" |  
        | 0.32 | 50 | OHIO:
        B175 | 1 | 5/8" | 7/8" |  
        | 0.32 | 50 | BOSTON:
        718-50-G | 2 | 5/8" | 7/8" |  
        | 0.32 | 60 | FOOTE-BROTHERS:
        2T200B | 1 | 5/8" | 7/8" |  
        | 0.32 | 300 | BROWNING:
        237DR-20-L | 1 | 1/2" | 1-1/8" |  
        | 0.33 | 30 | PERFECTION:
        ST1830-B | 1 | 1/2" | 3/4" |  
        | 0.33 | 30 | GROVE:
        B1133-2 | 1 | 1/2" | 5/8" |  
        | 0.33 | 30 | PERFECTION:
        ST1830-A | 18 | 1/2" | 3/4" |  
        | 0.33 | 40 | RELIANCE:
        B-40 | 1 | 5/8" | 3/4" |  
        | 0.33 | 40 | BOSTON:
        TA40 | 1 | 1/2" | 3/4" |  
        | 0.33 | 40 | BOSTON:
        TA40 | 1 | 1/2" | 3/4" |  
        | 0.33 | 50 | WINSMITH:
        4B | 6 | 5/8" | 3/4" |  
        | 0.33 | 50 | WINSMITH:
        4B | 1 | 5/8" | 3/4" |  
        | 0.33 | 50 | WINSMITH:
        4B | 1 | 5/8" | 3/4" |  
        | 0.33 | 60 | WINSMITH:
        4-1/2BT | 1 | 3/4" | 1-1/4" |  
        | 0.33 | 60 | BOSTON:
        T8A | 1 | 3/4" | 1" |  
        | 0.33 | 60 | BOSTON:
        TAA-60 | 1 | 3/4" | 1" |  
        | 0.33 | 60 | BOSTON:
        TAA-60 | 1 | 3/4" | 1" |  
        | 0.33 | 225 | WINSMITH:
        4DB | 1 | 3/4" | 1" |  
        | 0.34 | 30 | OHIO:
        U-18-MC | 1 | 56C | 3/4" |  
        | 0.34 | 49 | WINSMITH:
        3CB | 1 | 5/8" | 7/8" |  
        | 0.34 | 50 | OHIO:
        B175 | 3 | 5/8" | 7/8" |  
        | 0.34 | 60 | EBERHARDT-DENVER:
        18SF-60 | 3 | 5/8" | 1" |  
        | 0.35 | 15 | RADICON:
        112-2A | 6 | 7/16" | 5/8" |  
        | 0.35 | 15 | RADICON:
        112-1A | 1 | 7/16" | 5/8" |  
        | 0.36 | 250 | OHIO: D3 | 1 | 5/8" | 1" |  
        | 0.37 | 44 | FOOTE-BROTHERS:
        3W | 2 | 13/16 | 1-1/16" |  
        | 0.37 | 48 | MORSE:
        21LT | 1 | 5/8" | 3/4" |  
        | 0.37 | 66 | BOSTON:
        UF66 (now U-38) | 1 | 1" | 1-3/8" |  
        | 0.37 | 100 | OHIO:
        HS-1 | 1 | 5/8" | 1" |  
        | 0.38 | 20 | OHIO:
        U-13-MC | 1 | 56C | 5/8" |  
        | 0.38 | 66 | EBERHARDT-DENVER:
        26W | 2 | 3/4" | 1-1/8" |  
        | 0.38 | 66 | EBERHARDT-DENVER:
        26LV | 1 | 3/4" | 1" |  
        | 0.38 | 66 | EBERHARDT-DENVER:
        26W | 5 | 3/4" | 1-1/8" |  
        | 0.38 | 2080 | CLEVELAND:
        73D | 1 | 1-1/4" | 2-7/8" |  
        | 0.39 | 40 | PERFECTION:
        ST2140-B | 3 | 5/8" | 7/8" |  
        | 0.39 | 40 | PERFECTION:
        ST2140-UB | 2 | 5/8" | 7/8" |  
        | 0.39 | 40 | PERFECTION:
        TC2140-UB | 1 | 5/8" | 7/8" |  
        | 0.39 | 48 | BOSTON:
        U21SP | 4 | 5/87/8" | " |  
        | 0.42 | 40 | BOSTON:
        S718-40-G | 4 | 5/8" | 1" |  
        | 0.42 | 50 | PERFECTION:
        ST2450-B | 1 | 3/4" | 1" |  
        | 0.42 | 58 | WINSMITH:
        3CB | 1 | 5/8" | 3/4" |  
        | 0.43 | 20 | OHIO:
        U-18-MC | 1 | 56C | 3/4" |  
        | 0.43 | 50 | OHIO:
        HS-0 | 1 | 1/2" | 3/4" |  
        | 0.43 | 50 | OHIO:
        HS-0 | 6 | 1/2" | 3/4" |  
        | 0.43 | 68 | D.O.
        JAMES: 26ST | 1 | 3/4" | 1-1/8" |  
        | 0.43 | 68 | D.O.
        JAMES: 26ST | 1 | 3/4" | 1-1/8" |  
        | 0.44 | 50 | BROWNING:
        175U1-LR-50E | 1 | 5/8" | 3/4" |  
        | 0.46 | 60 | EBERHARDT-DENVER:
        20V | 1 | 3/4" | 1" |  
        | 0.47 | 15 | HUB CITY:
        131 | 1 | 1/2" | 5/8" |  
        | 0.47 | 15 | BOSTON:
        U124 | 1 | 3/4" | 1" |  
        | 0.47 | 20 | PERFECTION:
        ST1820-B | 1 | 1/2" | 3/4" |  
        | 0.47 | 20 | PERFECTION:
        ST1820-A | 1 | 1/2" | 3/4" |  
        | 0.47 | 50 | RADICON:
        WA-200 | 1 | 5/8" | 1" |  
        | 0.47 | 50 | RADICON:
        AA200 | 1 | 5/8" | 1" |  
        | 0.48 | 15 | OHIO:
        B133 | 2 | 1/2" | 5/8" |  
        | 0.48 | 30 | BOSTON:
        U118 | 2 | 5/8" | 3/4" |  
        | 0.48 | 315 | D.O.
        JAMES: 35DW | 1 | 3/4" | 1-3/8" |  
        | 0.49 | 25 | PERFECTION:
        ST1325-B | 1 | 1/2" | 5/8" |  
 |