# Huademan Gear Reducers & Ratio Finder | Dingfeng

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# Gear reducers

      HUADEMAN
      R / S / K / F series
      38 models
      Ratios 3.37–290
      Brand & budget options · Ask about stock

The catalog describes modular hardened-tooth gear reducers with efficiency up to 96% depending on configuration: R inline helical, S helical-worm, K helical-bevel and F parallel-shaft units. Other ranges include T gearboxes, screw jacks, RV worm units and cycloidal reducers. Browse actual ratios below.

38Models across four series

1116Catalog ratios

9Product series

2025Catalog year

## Four main reducer series

Modular designs with shared components; confirm spares and lead time for your configuration

### R series hardened helical gear reducers

Inline hardened helical reducers with input and output on the same axis. The R range offers a broad selection of two- and three-stage configurations, closely spaced ratios and compact housings for efficient load transmission.

R17 / R27 / R37 / R47 / R57 / R67 / R77 / R87 / R97 / R107 / R137 / R147

### S series helical-worm gear reducers

A helical stage combined with worm gearing provides right-angle output. The design combines compact right-angle installation and high ratios with improved efficiency compared with an equivalent worm-only arrangement.

S37 / S47 / S57 / S67 / S77 / S87 / S97

### K series helical-bevel gear reducers

Helical and spiral-bevel stages provide right-angle output for heavy-duty transmission. Confirm load capacity and duty requirements for the selected size. For one-directional loads, specify rotation direction when ordering.

K37 / K47 / K57 / K67 / K77 / K87 / K97 / K107 / K127 / K157

### F series parallel-shaft helical gear reducers

Parallel-shaft helical reducers have parallel input and output shafts in a low-profile housing. They suit restricted installation heights and close mounting, often using a hollow shaft fitted directly over the driven shaft.

F37 / F47 / F57 / F67 / F77 / F87 / F97 / F107 / F127

## Find actual gear ratios

Click a ratio to copy an inquiry · Data transcribed from the manufacturer catalog

### R series actual ratios

R series hardened helical gear reducers

R · 2025 Huademan reducer catalog
 | Model size | Actual ratio i | Source flags
 | R17 | 81.45 |
 | R17 | 70.23 |
 | R17 | 65.46 |
 | R17 | 57.22 |
 | R17 | 53.64 |
 | R17 | 47.33 |
 | R17 | 44.34 |
 | R17 | 38.76 |
 | R17 | 36.33 |
 | R17 | 32.06 |
 | R17 | 28.42 |
 | R17 | 23.88 |
 | R17 | 25.23 |
 | R17 | 23.15 |
 | R17 | 19.71 |
 | R17 | 16.99 |
 | R17 | 15.84 |
 | R17 | 13.84 |
 | R17 | 12.98 |
 | R17 | 11.45 |
 | R17 | 10.15 |
 | R17 | 8.53 |
 | R17 | 7.38 |
 | R17 | 6.88 |
 | R17 | 6.02 |
 | R17 | 5.64 |
 | R17 | 4.98 |
 | R17 | 4.41 |
 | R17 | 3.71 |
 | R27 | 132.89 |
 | R27 | 121.9 |
 | R27 | 103.78 |
 | R27 | 89.48 |
 | R27 | 83.4 |
 | R27 | 72.9 |
 | R27 | 65.84 |
 | R27 | 60.95 |
 | R27 | 52.49 |
 | R27 | 45.44 |
 | R27 | 39.54 |
 | R27 | 35.71 |
 | R27 | 33.06 |
 | R27 | 28.47 |
 | R27 | 24.65 |
 | R27 | 22.37 |
 | R27 | 19.28 |
 | R27 | 18.02 |
 | R27 | 15.85 |
 | R27 | 13.3 |
 | R27 | 11.55 |
 | R27 | 10.09 |
 | R27 | 9.29 |
 | R27 | 7.96 |
 | R27 | 6.7 |
 | R27 | 5.63 |
 | R27 | 4.89 |
 | R27 | 4.27 |
 | R27 | 3.93 |
 | R27 | 3.37 |
 | R37 | 134.82 |
 | R37 | 123.66 |
 | R37 | 105.28 |
 | R37 | 90.77 |
 | R37 | 84.61 |
 | R37 | 73.96 |
 | R37 | 66.8 |
 | R37 | 61.83 |
 | R37 | 53.25 |
 | R37 | 46.1 |
 | R37 | 44.81 |
 | R37 | 39.17 |
 | R37 | 35.38 |
 | R37 | 32.75 |
 | R37 | 28.2 |
 | R37 | 24.42 |
 | R37 | 22.16 |
 | R37 | 19.31 |
 | R37 | 18.05 |
 | R37 | 15.87 |
 | R37 | 13.31 |
 | R37 | 11.56 |
 | R37 | 10.11 |
 | R37 | 9.3 |
 | R37 | 7.97 |
 | R37 | 6.78 |
 | R37 | 5.69 |
 | R37 | 4.94 |
 | R37 | 4.32 |
 | R37 | 3.97 |
 | R37 | 3.41 |
 | R47 | 165.03 |
 | R47 | 152.03 |
 | R47 | 132.38 |
 | R47 | 115.29 |
 | R47 | 108.02 |
 | R47 | 95.47 |
 | R47 | 86.86 |
 | R47 | 81.02 |
 | R47 | 70.92 |
 | R47 | 65.15 |
 | R47 | 57.58 |
 | R47 | 52.39 |
 | R47 | 48.86 |
 | R47 | 42.78 |
 | R47 | 36.95 |
 | R47 | 34.47 |
 | R47 | 29.9 |
 | R47 | 26.72 |
 | R47 | 22.82 |
 | R47 | 21.3 |
 | R47 | 18.83 |
 | R47 | 17.13 |
 | R47 | 15.98 |
 | R47 | 13.98 |
 | R47 | 12.08 |
 | R47 | 11.27 |
 | R47 | 9.78 |
 | R47 | 8.73 |
 | R47 | 7.46 |
 | R47 | 6.25 |
 | R47 | 5.83 |
 | R47 | 5.05 |
 | R47 | 4.52 |
 | R47 | 3.86 |
 | R57 | 187.98 |
 | R57 | 173.17 |
 | R57 | 150.78 |
 | R57 | 131.31 |
 | R57 | 123.04 |
 | R57 | 108.75 |
 | R57 | 98.93 |
 | R57 | 92.28 |
 | R57 | 80.78 |
 | R57 | 69.88 |
 | R57 | 65.48 |
 | R57 | 57.87 |
 | R57 | 52.65 |
 | R57 | 49.11 |
 | R57 | 42.99 |
 | R57 | 37.13 |
 | R57 | 34.64 |
 | R57 | 30.05 |
 | R57 | 26.85 |
 | R57 | 25.14 |
 | R57 | 22.32 |
 | R57 | 19 |
 | R57 | 16.74 |
 | R57 | 14.86 |
 | R57 | 13.92 |
 | R57 | 11.95 |
 | R57 | 10.86 |
 | R57 | 9.4 |
 | R57 | 7.94 |
 | R57 | 7.44 |
 | R57 | 6.39 |
 | R57 | 5.8 |
 | R57 | 5.03 |
 | R57 | 4.38 |
 | R67 | 200.96 |
 | R67 | 185.13 |
 | R67 | 161.2 |
 | R67 | 140.38 |
 | R67 | 131.54 |
 | R67 | 116.26 |
 | R67 | 105.77 |
 | R67 | 98.65 |
 | R67 | 86.36 |
 | R67 | 74.6 |
 | R67 | 69.6 |
 | R67 | 61.87 |
 | R67 | 56.29 |
 | R67 | 52.5 |
 | R67 | 45.96 |
 | R67 | 39.7 |
 | R67 | 37.04 |
 | R67 | 32.13 |
 | R67 | 28.7 |
 | R67 | 26.88 |
 | R67 | 23.86 |
 | R67 | 20.31 |
 | R67 | 17.9 |
 | R67 | 15.89 |
 | R67 | 14.88 |
 | R67 | 12.77 |
 | R67 | 11.61 |
 | R67 | 10.05 |
 | R67 | 8.75 |
 | R67 | 7.79 |
 | R67 | 7.3 |
 | R67 | 6.27 |
 | R67 | 5.7 |
 | R67 | 4.93 |
 | R67 | 4.29 |
 | R77 | 196 | △ 速比过高，厂家建议尽量不订货
 | R77 | 169.14 |
 | R77 | 147.94 |
 | R77 | 138.92 |
 | R77 | 123.36 |
 | R77 | 105 |
 | R77 | 92.52 |
 | R77 | 82.12 |
 | R77 | 76.92 |
 | R77 | 66.02 |
 | R77 | 58.98 |
 | R77 | 51.97 |
 | R77 | 46.13 |
 | R77 | 43.21 |
 | R77 | 37.09 |
 | R77 | 33.7 |
 | R77 | 29.19 |
 | R77 | 25.41 |
 | R77 | 23.92 |
 | R77 | 21.21 |
 | R77 | 18.96 |
 | R77 | 17.78 |
 | R77 | 15.72 |
 | R77 | 14.17 |
 | R77 | 12.43 |
 | R77 | 10.97 |
 | R77 | 9.48 |
 | R77 | 8.81 |
 | R77 | 7.93 |
 | R77 | 6.96 |
 | R77 | 6.14 |
 | R77 | 5.31 |
 | R87 | 248.57 | △ 速比过高，厂家建议尽量不订货
 | R87 | 218.36 |
 | R87 | 205.52 |
 | R87 | 183.35 |
 | R87 | 157.5 |
 | R87 | 139.69 |
 | R87 | 124.85 |
 | R87 | 117.08 |
 | R87 | 103.56 |
 | R87 | 93.29 |
 | R87 | 81.84 |
 | R87 | 71.9 |
 | R87 | 67.43 |
 | R87 | 59.64 |
 | R87 | 53.73 |
 | R87 | 47.13 |
 | R87 | 41.59 |
 | R87 | 35.95 |
 | R87 | 31.48 |
 | R87 | 28.08 |
 | R87 | 23.38 |
 | R87 | 21.49 |
 | R87 | 19.08 |
 | R87 | 17.06 |
 | R87 | 14.94 |
 | R87 | 13.31 |
 | R87 | 12.08 |
 | R87 | 9.89 |
 | R87 | 9.09 |
 | R87 | 7.96 |
 | R87 | 7.1 |
 | R87 | 6.44 |
 | R87 | 5.27 |
 | R97 | 287.91 | △ 速比过高，厂家建议尽量不订货
 | R97 | 254.12 | △ 速比过高，厂家建议尽量不订货
 | R97 | 239.76 | △ 速比过高，厂家建议尽量不订货
 | R97 | 214.96 | △ 速比过高，厂家建议尽量不订货
 | R97 | 186.85 |
 | R97 | 166.86 |
 | R97 | 150.2 |
 | R97 | 125.09 |
 | R97 | 114.96 |
 | R97 | 102.09 |
 | R97 | 91.27 |
 | R97 | 79.92 |
 | R97 | 71.23 |
 | R97 | 66.69 |
 | R97 | 61.29 |
 | R97 | 54.43 |
 | R97 | 48.66 |
 | R97 | 42.61 |
 | R97 | 37.98 |
 | R97 | 34.46 |
 | R97 | 28.21 |
 | R97 | 25.52 |
 | R97 | 22.82 |
 | R97 | 20.55 |
 | R97 | 18.15 |
 | R97 | 16.32 |
 | R97 | 14.97 |
 | R97 | 12.51 |
 | R97 | 10.92 |
 | R97 | 9.32 |
 | R97 | 8.55 |
 | R97 | 7.14 |
 | R97 | 6.24 |
 | R97 | 5.22 |
 | R97 | 4.52 |
 | R107 | 250.23 | △ 速比过高，厂家建议尽量不订货
 | R107 | 224.34 | △ 速比过高，厂家建议尽量不订货
 | R107 | 202.77 |
 | R107 | 171.07 |
 | R107 | 157.78 |
 | R107 | 141.06 |
 | R107 | 127.01 |
 | R107 | 112.17 |
 | R107 | 100.89 |
 | R107 | 92.56 |
 | R107 | 77.31 |
 | R107 | 72.71 |
 | R107 | 65.47 |
 | R107 | 57.82 |
 | R107 | 52.01 |
 | R107 | 47.71 |
 | R107 | 39.85 |
 | R107 | 34.81 |
 | R107 | 29.11 |
 | R107 | 27.39 |
 | R107 | 24.73 |
 | R107 | 22.12 |
 | R107 | 19.97 |
 | R107 | 18.3 |
 | R107 | 15.4 |
 | R107 | 13.44 |
 | R107 | 11.4 |
 | R107 | 9.97 |
 | R107 | 8.21 |
 | R107 | 7.94 |
 | R107 | 6.73 |
 | R107 | 5.88 |
 | R107 | 4.85 |
 | R137 | 224.05 | △ 速比过高，厂家建议尽量不订货
 | R137 | 193.36 |
 | R137 | 176.48 |
 | R137 | 158.21 |
 | R137 | 142.86 |
 | R137 | 127.75 |
 | R137 | 115.33 |
 | R137 | 105.67 |
 | R137 | 88.95 |
 | R137 | 82.01 |
 | R137 | 73.34 |
 | R137 | 66.21 |
 | R137 | 60.66 |
 | R137 | 51.06 |
 | R137 | 44.57 |
 | R137 | 37.8 |
 | R137 | 33.04 |
 | R137 | 27.22 |
 | R137 | 24.07 |
 | R137 | 22.72 |
 | R137 | 19.09 |
 | R137 | 16.85 |
 | R137 | 14.55 |
 | R137 | 12.87 |
 | R137 | 10.81 |
 | R137 | 8.74 |
 | R137 | 7.64 |
 | R137 | 6.42 |
 | R137 | 5.19 |
 | R147 | 162.56 |
 | R147 | 143.98 |
 | R147 | 119.43 |
 | R147 | 112.73 |
 | R147 | 94.75 |
 | R147 | 83.6 |
 | R147 | 72.2 |
 | R147 | 67.31 |
 | R147 | 63.86 |
 | R147 | 53.67 |
 | R147 | 47.12 |
 | R147 | 40.69 |
 | R147 | 35.99 |
 | R147 | 30.25 |
 | R147 | 24.43 |
 | R147 | 20.67 |
 | R147 | 18.28 |
 | R147 | 15.89 |
 | R147 | 14.14 |
 | R147 | 12.01 |
 | R147 | 9.76 |
 | R147 | 8.28 |
 | R147 | 7.23 |
 | R147 | 5.87 |
 | R147 | 4.98 |

S series helical-worm gear reducers

S · 2025 Huademan reducer catalog
 | Model size | Actual ratio i | Source flags
 | S37 | 157.43 |
 | S37 | 144.4 |
 | S37 | 122.94 |
 | S37 | 106 |
 | S37 | 98.8 |
 | S37 | 86.36 |
 | S37 | 78 |
 | S37 | 72.2 |
 | S37 | 62.18 |
 | S37 | 53.83 |
 | S37 | 51.3 |
 | S37 | 43.68 |
 | S37 | 37.66 |
 | S37 | 35.1 |
 | S37 | 30.68 |
 | S37 | 27.71 |
 | S37 | 25.65 |
 | S37 | 22.09 |
 | S37 | 19.13 |
 | S37 | 18.2 |
 | S37 | 15.91 |
 | S37 | 14.37 |
 | S37 | 13.3 |
 | S37 | 11.45 |
 | S37 | 9.92 |
 | S37 | 9.24 | ● 非标订做
 | S37 | 8.04 | ● 非标订做
 | S47 | 201 |
 | S47 | 184.8 |
 | S47 | 158.12 |
 | S47 | 137.05 |
 | S47 | 128.1 |
 | S47 | 112.64 |
 | S47 | 94.5 |
 | S47 | 82.09 |
 | S47 | 71.75 |
 | S47 | 66 |
 | S47 | 56.61 |
 | S47 | 54.59 |
 | S47 | 47.32 |
 | S47 | 44.23 |
 | S47 | 38.89 |
 | S47 | 32.63 |
 | S47 | 28.34 |
 | S47 | 24.77 |
 | S47 | 22.79 |
 | S47 | 19.54 |
 | S47 | 18.1 |
 | S47 | 15.19 |
 | S47 | 13.19 |
 | S47 | 11.53 |
 | S47 | 10.61 |
 | S47 | 9.1 |
 | S47 | 7.83 | ● 非标订做
 | S57 | 201 |
 | S57 | 184.8 |
 | S57 | 158.12 |
 | S57 | 137.05 |
 | S57 | 128.1 |
 | S57 | 112.64 |
 | S57 | 94.5 |
 | S57 | 82.09 |
 | S57 | 71.75 |
 | S57 | 66 |
 | S57 | 56.61 |
 | S57 | 54.59 |
 | S57 | 47.32 |
 | S57 | 44.23 |
 | S57 | 38.89 |
 | S57 | 32.63 |
 | S57 | 28.34 |
 | S57 | 24.77 |
 | S57 | 22.79 |
 | S57 | 19.54 |
 | S57 | 17.54 |
 | S57 | 15.42 |
 | S57 | 12.94 |
 | S57 | 11.24 |
 | S57 | 9.82 |
 | S57 | 9.04 |
 | S57 | 7.75 |
 | S57 | 6.67 | ● 非标订做
 | S67 | 219.88 |
 | S67 | 192.32 |
 | S67 | 180.6 |
 | S67 | 160.36 |
 | S67 | 136.5 |
 | S67 | 120.27 |
 | S67 | 106.75 |
 | S67 | 100 |
 | S67 | 85.83 |
 | S67 | 78 |
 | S67 | 67.57 |
 | S67 | 58.8 |
 | S67 | 55.36 |
 | S67 | 47.13 |
 | S67 | 41.52 |
 | S67 | 36.85 |
 | S67 | 34.52 |
 | S67 | 29.63 |
 | S67 | 26.93 |
 | S67 | 23.33 |
 | S67 | 20.3 |
 | S67 | 18.43 |
 | S67 | 17.26 |
 | S67 | 14.82 |
 | S67 | 13.46 |
 | S67 | 11.66 |
 | S67 | 10.15 |
 | S67 | 8.86 | ● 非标订做
 | S77 | 258.82 | △ 速比过高，厂家建议尽量不订货
 | S77 | 227.37 |
 | S77 | 214 |
 | S77 | 190.91 |
 | S77 | 164 |
 | S77 | 145.45 |
 | S77 | 130 |
 | S77 | 121.9 |
 | S77 | 107.83 |
 | S77 | 97.14 |
 | S77 | 85.22 |
 | S77 | 75.2 |
 | S77 | 65 |
 | S77 | 56.92 |
 | S77 | 54.67 |
 | S77 | 48.48 |
 | S77 | 43.33 |
 | S77 | 40.63 |
 | S77 | 35.94 |
 | S77 | 32.38 |
 | S77 | 28.41 |
 | S77 | 25.07 |
 | S77 | 21.67 |
 | S77 | 18.97 |
 | S77 | 18.21 |
 | S77 | 15.98 |
 | S77 | 14.1 |
 | S77 | 12.19 |
 | S77 | 10.67 |
 | S77 | 9.38 | ● 非标订做
 | S77 | 8.25 | ● 非标订做
 | S87 | 290 | △ 速比过高，厂家建议尽量不订货
 | S87 | 260 | △ 速比过高，厂家建议尽量不订货
 | S87 | 226 |
 | S87 | 201.82 |
 | S87 | 181.67 |
 | S87 | 151.3 |
 | S87 | 139.05 |
 | S87 | 123.48 |
 | S87 | 110.4 |
 | S87 | 96.67 |
 | S87 | 86.15 |
 | S87 | 78.18 |
 | S87 | 64 |
 | S87 | 57.53 |
 | S87 | 47.91 |
 | S87 | 44.03 |
 | S87 | 39.1 |
 | S87 | 34.96 |
 | S87 | 30.61 |
 | S87 | 27.28 |
 | S87 | 24.76 |
 | S87 | 20.27 |
 | S87 | 17.62 |
 | S87 | 16.13 |
 | S87 | 13.2 |
 | S87 | 11.48 |
 | S87 | 9.9 | ● 非标订做
 | S87 | 9.2 | ● 非标订做
 | S97 | 290 | △ 速比过高，厂家建议尽量不订货
 | S97 | 260 | △ 速比过高，厂家建议尽量不订货
 | S97 | 235 |
 | S97 | 198.26 |
 | S97 | 182.86 |
 | S97 | 163.48 |
 | S97 | 147.2 |
 | S97 | 130 |
 | S97 | 116.92 |
 | S97 | 107.27 |
 | S97 | 89.6 |
 | S97 | 78.26 |
 | S97 | 65.45 |
 | S97 | 61.13 |
 | S97 | 56.38 |
 | S97 | 50.41 |
 | S97 | 45.39 |
 | S97 | 40.08 |
 | S97 | 36.05 |
 | S97 | 33.08 |
 | S97 | 27.63 |
 | S97 | 24.13 |
 | S97 | 20.18 |
 | S97 | 17.47 |
 | S97 | 16.14 |
 | S97 | 13.5 |
 | S97 | 11.69 |

K series helical-bevel gear reducers

K · 2025 Huademan reducer catalog
 | Model size | Actual ratio i | Source flags
 | K37 | 107.9 |
 | K37 | 99.21 |
 | K37 | 84.89 |
 | K37 | 73.58 |
 | K37 | 68.77 |
 | K37 | 60.47 |
 | K37 | 50.73 |
 | K37 | 44.07 |
 | K37 | 38.52 |
 | K37 | 35.43 |
 | K37 | 30.39 |
 | K37 | 27.25 |
 | K37 | 23.96 |
 | K37 | 20.1 |
 | K37 | 17.46 |
 | K37 | 15.26 |
 | K37 | 14.04 |
 | K37 | 12.23 |
 | K37 | 10.26 |
 | K37 | 8.92 |
 | K37 | 7.79 |
 | K37 | 7.17 |
 | K37 | 6.15 |
 | K37 | 5.29 |
 | K47 | 132.6 |
 | K47 | 122.2 |
 | K47 | 106.4 |
 | K47 | 92.65 |
 | K47 | 86.82 |
 | K47 | 76.73 |
 | K47 | 69.81 |
 | K47 | 65.11 |
 | K47 | 57 |
 | K47 | 49.24 |
 | K47 | 45.93 |
 | K47 | 39.84 |
 | K47 | 35.6 |
 | K47 | 33.1 |
 | K47 | 31.02 |
 | K47 | 27.41 |
 | K47 | 24.94 |
 | K47 | 23.26 |
 | K47 | 20.36 |
 | K47 | 17.59 |
 | K47 | 16.41 |
 | K47 | 14.23 |
 | K47 | 12.72 |
 | K47 | 12.43 |
 | K47 | 10.89 |
 | K47 | 9.4 |
 | K47 | 8.77 |
 | K47 | 7.61 |
 | K47 | 6.8 |
 | K47 | 5.81 |
 | K57 | 144.8 | △ 速比过高，厂家建议尽量不订货
 | K57 | 124.9 |
 | K57 | 109.3 |
 | K57 | 102.6 |
 | K57 | 91.12 |
 | K57 | 77.56 |
 | K57 | 68.34 |
 | K57 | 60.66 |
 | K57 | 56.82 |
 | K57 | 48.77 |
 | K57 | 44.32 |
 | K57 | 38.39 |
 | K57 | 36.93 |
 | K57 | 31.43 |
 | K57 | 27.69 |
 | K57 | 24.58 |
 | K57 | 23.03 |
 | K57 | 19.76 |
 | K57 | 17.96 |
 | K57 | 15.56 |
 | K57 | 13.54 |
 | K57 | 12.62 |
 | K57 | 11.82 |
 | K57 | 10.14 |
 | K57 | 9.22 |
 | K57 | 7.99 |
 | K57 | 6.95 |
 | K67 | 145.98 | △ 速比过高，厂家建议尽量不订货
 | K67 | 125.97 |
 | K67 | 110.18 |
 | K67 | 103.47 |
 | K67 | 91.88 |
 | K67 | 78.2 |
 | K67 | 68.91 |
 | K67 | 61.16 |
 | K67 | 57.29 |
 | K67 | 49.17 |
 | K67 | 44.69 |
 | K67 | 38.71 |
 | K67 | 36.34 |
 | K67 | 30.93 |
 | K67 | 27.25 |
 | K67 | 24.19 |
 | K67 | 22.66 |
 | K67 | 19.45 |
 | K67 | 17.68 |
 | K67 | 15.31 |
 | K67 | 13.32 |
 | K67 | 12.57 |
 | K67 | 10.79 |
 | K67 | 9.8 |
 | K67 | 8.49 |
 | K67 | 7.39 |
 | K77 | 192.08 | △ 速比过高，厂家建议尽量不订货
 | K77 | 177.69 | △ 速比过高，厂家建议尽量不订货
 | K77 | 153.99 | △ 速比过高，厂家建议尽量不订货
 | K77 | 135.27 |
 | K77 | 127.32 |
 | K77 | 113.58 |
 | K77 | 97.57 |
 | K77 | 86.54 |
 | K77 | 77.34 |
 | K77 | 72.53 |
 | K77 | 64.15 |
 | K77 | 57.8 |
 | K77 | 50.7 |
 | K77 | 44.74 |
 | K77 | 38.67 |
 | K77 | 34.23 |
 | K77 | 30.59 |
 | K77 | 28.69 |
 | K77 | 25.37 |
 | K77 | 22.86 |
 | K77 | 20.05 |
 | K77 | 17.7 |
 | K77 | 15.3 |
 | K77 | 13.4 |
 | K77 | 12.33 |
 | K77 | 10.81 |
 | K77 | 9.54 |
 | K77 | 8.25 |
 | K77 | 7.22 |
 | K87 | 197.51 | △ 速比过高，厂家建议尽量不订货
 | K87 | 174.34 | △ 速比过高，厂家建议尽量不订货
 | K87 | 164.48 | △ 速比过高，厂家建议尽量不订货
 | K87 | 147.47 | △ 速比过高，厂家建议尽量不订货
 | K87 | 128.18 |
 | K87 | 114.47 |
 | K87 | 103.04 |
 | K87 | 85.82 |
 | K87 | 78.87 |
 | K87 | 70.04 |
 | K87 | 62.62 |
 | K87 | 54.83 |
 | K87 | 48.87 |
 | K87 | 44.34 |
 | K87 | 36.3 |
 | K87 | 31.19 |
 | K87 | 27.7 |
 | K87 | 24.77 |
 | K87 | 21.69 |
 | K87 | 19.33 |
 | K87 | 17.54 |
 | K87 | 14.36 |
 | K87 | 12.57 |
 | K87 | 11.2 |
 | K87 | 10.16 |
 | K87 | 8.32 |
 | K87 | 7.24 |
 | K97 | 171.24 | △ 速比过高，厂家建议尽量不订货
 | K97 | 152.02 | △ 速比过高，厂家建议尽量不订货
 | K97 | 136.3 | △ 速比过高，厂家建议尽量不订货
 | K97 | 123.19 |
 | K97 | 103.93 |
 | K97 | 95.86 |
 | K97 | 85.7 |
 | K97 | 77.17 |
 | K97 | 68.15 |
 | K97 | 61.29 |
 | K97 | 56.23 |
 | K97 | 46.97 |
 | K97 | 41.03 |
 | K97 | 33.9 |
 | K97 | 30.52 |
 | K97 | 26.96 |
 | K97 | 24.24 |
 | K97 | 22.24 |
 | K97 | 18.58 |
 | K97 | 16.23 |
 | K97 | 13.57 |
 | K97 | 11.75 |
 | K97 | 10.33 |
 | K97 | 8.64 |
 | K97 | 7.48 |
 | K107 | 144.99 | △ 速比过高，厂家建议尽量不订货
 | K107 | 125.13 |
 | K107 | 114.21 |
 | K107 | 102.38 |
 | K107 | 92.45 |
 | K107 | 82.67 |
 | K107 | 74.64 |
 | K107 | 68.38 |
 | K107 | 57.56 |
 | K107 | 50.24 |
 | K107 | 42.62 |
 | K107 | 37.25 |
 | K107 | 30.69 |
 | K107 | 29.52 |
 | K107 | 27.05 |
 | K107 | 22.77 |
 | K107 | 19.87 |
 | K107 | 16.86 |
 | K107 | 14.73 |
 | K107 | 13.43 |
 | K107 | 11.72 |
 | K107 | 9.94 |
 | K107 | 8.69 |
 | K107 | 7.16 |
 | K127 | 144.5 | △ 速比过高，厂家建议尽量不订货
 | K127 | 133.37 | △ 速比过高，厂家建议尽量不订货
 | K127 | 122.16 |
 | K127 | 108.2 |
 | K127 | 89.75 |
 | K127 | 84.72 |
 | K127 | 71.2 |
 | K127 | 62.83 |
 | K127 | 54.26 |
 | K127 | 47.99 |
 | K127 | 40.33 |
 | K127 | 38.66 |
 | K127 | 32.49 |
 | K127 | 28.67 |
 | K127 | 24.76 |
 | K127 | 21.9 |
 | K127 | 19.63 |
 | K127 | 17.32 |
 | K127 | 14.96 |
 | K127 | 13.23 |
 | K127 | 11.12 |
 | K127 | 8.98 |
 | K157 | 146.5 | △ 速比过高，厂家建议尽量不订货
 | K157 | 119.54 | △ 速比过高，厂家建议尽量不订货
 | K157 | 99.65 |
 | K157 | 94.22 |
 | K157 | 80.54 |
 | K157 | 71.24 |
 | K157 | 61.92 |
 | K157 | 55.11 |
 | K157 | 46.79 |
 | K157 | 38.02 |
 | K157 | 32.24 |
 | K157 | 28.18 |
 | K157 | 24.49 |
 | K157 | 21.8 |
 | K157 | 18.51 |
 | K157 | 15.04 |
 | K157 | 12.75 |

F series parallel-shaft helical gear reducers

F · 2025 Huademan reducer catalog
 | Model size | Actual ratio i | Source flags
 | F37 | 128.23 |
 | F37 | 117.62 |
 | F37 | 100.14 |
 | F37 | 86.34 |
 | F37 | 80.48 |
 | F37 | 70.35 |
 | F37 | 63.53 |
 | F37 | 58.81 |
 | F37 | 50.65 |
 | F37 | 47.01 |
 | F37 | 43.81 |
 | F37 | 38.3 |
 | F37 | 34.59 |
 | F37 | 32.02 |
 | F37 | 27.58 |
 | F37 | 23.87 |
 | F37 | 21.67 |
 | F37 | 19.5 |
 | F37 | 17.23 |
 | F37 | 15.68 |
 | F37 | 14.63 |
 | F37 | 12.8 |
 | F37 | 11.06 |
 | F37 | 10.32 |
 | F37 | 8.95 |
 | F37 | 7.72 |
 | F37 | 7.2 |
 | F37 | 6.3 |
 | F37 | 5.44 |
 | F37 | 5.08 |
 | F37 | 4.41 |
 | F37 | 3.94 | ☆ 特殊速比
 | F47 | 189.39 |
 | F47 | 174.13 |
 | F47 | 148.98 |
 | F47 | 129.14 |
 | F47 | 120.7 |
 | F47 | 106.13 |
 | F47 | 89.04 |
 | F47 | 77.35 |
 | F47 | 67.61 |
 | F47 | 64.23 |
 | F47 | 56.48 |
 | F47 | 47.38 |
 | F47 | 41.16 |
 | F47 | 35.98 |
 | F47 | 33.09 |
 | F47 | 28.38 |
 | F47 | 25.85 |
 | F47 | 22 |
 | F47 | 19.38 |
 | F47 | 17.21 |
 | F47 | 16.12 |
 | F47 | 13.83 |
 | F47 | 12.57 |
 | F47 | 10.89 |
 | F47 | 9.07 |
 | F47 | 8.05 |
 | F47 | 7.54 |
 | F47 | 6.47 |
 | F47 | 5.88 |
 | F47 | 5.09 | ☆ 特殊速比
 | F57 | 199.7 |
 | F57 | 183.6 |
 | F57 | 157.09 |
 | F57 | 136.16 |
 | F57 | 127.27 |
 | F57 | 111.91 |
 | F57 | 93.89 |
 | F57 | 81.56 |
 | F57 | 71.29 |
 | F57 | 68.38 |
 | F57 | 60.12 |
 | F57 | 50.44 |
 | F57 | 43.82 |
 | F57 | 38.3 |
 | F57 | 35.23 |
 | F57 | 30.22 |
 | F57 | 26.01 | ☆ 特殊速比
 | F57 | 21.5 |
 | F57 | 18.94 |
 | F57 | 16.81 |
 | F57 | 15.75 |
 | F57 | 13.52 |
 | F57 | 12.29 |
 | F57 | 10.64 |
 | F57 | 9.26 |
 | F57 | 8.13 |
 | F57 | 7.62 |
 | F57 | 6.54 |
 | F57 | 5.94 |
 | F57 | 5.15 | ☆ 特殊速比
 | F67 | 229.6 | △ 速比过高，厂家建议尽量不订货
 | F67 | 198.14 |
 | F67 | 173.3 |
 | F67 | 162.74 |
 | F67 | 144.5 |
 | F67 | 123 |
 | F67 | 108.38 |
 | F67 | 96.19 |
 | F67 | 90.11 |
 | F67 | 81.17 |
 | F67 | 69.09 |
 | F67 | 60.88 |
 | F67 | 54.03 |
 | F67 | 50.62 |
 | F67 | 43.44 |
 | F67 | 39.48 |
 | F67 | 34.2 |
 | F67 | 32.61 |
 | F67 | 28.02 |
 | F67 | 24.85 |
 | F67 | 22.21 |
 | F67 | 20.83 |
 | F67 | 18.42 |
 | F67 | 16.6 |
 | F67 | 14.56 |
 | F67 | 12.85 |
 | F67 | 11.1 |
 | F67 | 9.72 |
 | F67 | 9.1 |
 | F67 | 8.53 |
 | F67 | 7.55 |
 | F67 | 6.8 |
 | F67 | 5.97 |
 | F67 | 5.26 |
 | F67 | 4.55 | ☆ 特殊速比
 | F67 | 3.98 | ☆ 特殊速比
 | F77 | 281.66 | △ 速比过高，厂家建议尽量不订货
 | F77 | 260.55 | △ 速比过高，厂家建议尽量不订货
 | F77 | 225.8 | △ 速比过高，厂家建议尽量不订货
 | F77 | 198.35 |
 | F77 | 186.69 |
 | F77 | 166.55 |
 | F77 | 143.07 |
 | F77 | 126.89 |
 | F77 | 113.41 |
 | F77 | 106.35 |
 | F77 | 94.07 |
 | F77 | 84.75 |
 | F77 | 74.34 |
 | F77 | 73.08 |
 | F77 | 65.32 |
 | F77 | 61.25 |
 | F77 | 54.17 |
 | F77 | 48.81 |
 | F77 | 42.82 |
 | F77 | 37.78 |
 | F77 | 32.66 |
 | F77 | 28.6 |
 | F77 | 25.5 |
 | F77 | 21.24 |
 | F77 | 19.52 |
 | F77 | 17.33 |
 | F77 | 15.5 |
 | F77 | 13.57 |
 | F77 | 12.09 |
 | F77 | 10.98 |
 | F77 | 8.98 |
 | F77 | 8.38 |
 | F77 | 7.49 |
 | F77 | 6.56 |
 | F77 | 5.85 |
 | F77 | 5.31 |
 | F77 | 4.34 |
 | F87 | 266.58 | △ 速比过高，厂家建议尽量不订货
 | F87 | 251.52 | △ 速比过高，厂家建议尽量不订货
 | F87 | 225.5 | △ 速比过高，厂家建议尽量不订货
 | F87 | 196.01 |
 | F87 | 175.04 |
 | F87 | 157.56 |
 | F87 | 131.23 |
 | F87 | 120.6 |
 | F87 | 107.09 |
 | F87 | 95.75 |
 | F87 | 83.84 |
 | F87 | 74.72 |
 | F87 | 67.81 |
 | F87 | 55.51 |
 | F87 | 51.05 |
 | F87 | 44.7 |
 | F87 | 39.84 |
 | F87 | 36.15 |
 | F87 | 29.59 |
 | F87 | 25.73 |
 | F87 | 23.94 |
 | F87 | 21.55 |
 | F87 | 19.04 |
 | F87 | 17.12 |
 | F87 | 15.71 |
 | F87 | 13.12 |
 | F87 | 11.46 |
 | F87 | 9.58 |
 | F87 | 8.3 |
 | F87 | 7.9 |
 | F87 | 6.6 |
 | F87 | 5.76 |
 | F87 | 4.82 |
 | F87 | 4.17 |
 | F97 | 280.47 | △ 速比过高，厂家建议尽量不订货
 | F97 | 251.46 | △ 速比过高，厂家建议尽量不订货
 | F97 | 227.28 |
 | F97 | 191.75 |
 | F97 | 176.85 |
 | F97 | 158.11 |
 | F97 | 142.36 |
 | F97 | 125.73 |
 | F97 | 113.08 |
 | F97 | 103.75 |
 | F97 | 86.66 |
 | F97 | 75.69 |
 | F97 | 73.39 |
 | F97 | 64.81 |
 | F97 | 58.29 |
 | F97 | 53.48 |
 | F97 | 44.67 |
 | F97 | 39.02 |
 | F97 | 32.63 |
 | F97 | 28.25 |
 | F97 | 24.79 |
 | F97 | 22.38 |
 | F97 | 20.51 |
 | F97 | 17.26 |
 | F97 | 15.07 |
 | F97 | 12.78 |
 | F97 | 11.17 |
 | F97 | 9.41 |
 | F97 | 7.92 |
 | F97 | 6.91 |
 | F97 | 5.86 |
 | F97 | 5.13 |
 | F97 | 4.22 |
 | F107 | 254.75 | △ 速比过高，厂家建议尽量不订货
 | F107 | 219.85 |
 | F107 | 200.66 |
 | F107 | 179.88 |
 | F107 | 162.42 |
 | F107 | 145.25 |
 | F107 | 131.13 |
 | F107 | 120.15 |
 | F107 | 101.13 |
 | F107 | 88.27 |
 | F107 | 83.38 |
 | F107 | 75.28 |
 | F107 | 68.97 |
 | F107 | 58.06 |
 | F107 | 50.68 |
 | F107 | 42.98 |
 | F107 | 37.57 |
 | F107 | 30.95 |
 | F107 | 27.36 |
 | F107 | 25.83 |
 | F107 | 21.71 |
 | F107 | 19.15 |
 | F107 | 16.54 |
 | F107 | 14.63 |
 | F107 | 12.3 |
 | F107 | 9.93 |
 | F107 | 8.35 |
 | F107 | 7.38 |
 | F107 | 6.21 |
 | F107 | 5.01 |
 | F127 | 171.88 |
 | F127 | 152.23 |
 | F127 | 126.28 |
 | F127 | 119.2 |
 | F127 | 100.18 |
 | F127 | 88.39 |
 | F127 | 76.34 |
 | F127 | 67.52 |
 | F127 | 67.18 |
 | F127 | 56.46 |
 | F127 | 49.82 |
 | F127 | 43.03 |
 | F127 | 38.06 |
 | F127 | 31.98 |
 | F127 | 25.83 |
 | F127 | 25.57 |
 | F127 | 21.86 |
 | F127 | 19.33 |
 | F127 | 16.8 |
 | F127 | 14.96 |
 | F127 | 12.7 |
 | F127 | 10.32 |
 | F127 | 8.75 |
 | F127 | 7.82 |
 | F127 | 6.64 |
 | F127 | 5.39 |
 | F127 | 4.57 |

        △ High single-stage ratio; manufacturer advises avoiding this option
        Dashed border Non-standard / special ratio

Ratios are the actual values listed in the manufacturer catalog. Provide your duty requirements to check motor power and output torque.

## Other series

Contact the store for model information and availability

### T series spiral-bevel gearboxes

Spiral-bevel gearboxes turn the drive through 90° or distribute power across multiple shafts. Typical catalog ratios include 1:1, 1.5:1, 2:1 and 3:1, with one-, two- or three-shaft output arrangements.

### SWL / JW worm screw jacks

Worm screw jacks convert rotation into linear force and can be arranged for synchronized lifting. Applications include platforms, mold ejection, gates and worktable adjustment. Confirm self-locking requirements for the specific configuration.

### CH series geared motors

Compact integrated geared motors are available with single- or three-phase motor arrangements for small, light-duty continuous-running equipment.

### RV series worm gear reducers

Compact, lightweight worm reducers with aluminum-alloy housings and flexible mounting for lower-power applications. Self-locking suitability depends on the specific ratio and operating conditions.

### Cycloidal gear reducers

Compact cycloidal reducers provide high single-stage ratios and are used where overload, shock loads or frequent starts and stops need to be considered.

## How to select

Selection formula and requirements

Selection formula: f₁ × f₂ × f₃ ≤ fB. The driven-machine factor f₁, reducer safety factor f₂ and starting factor f₃ must have a product no greater than the listed service factor fB. For K and T spiral-bevel units with one-directional loads, specify the rotation direction viewed from the output end.

1Motor power in kW

2Ratio i (or input / output speed)

3Required output torque in N·m

4Output shaft: solid / hollow / keyed

5Mounting: horizontal / vertical / flange / foot

6Model size (e.g. R87, K107, NMRV63)

7Whether an integrated geared motor is required

8Driven equipment, daily duty duration and shock loads

## Catalog brands

Ask the store about the available range

HUADEMANR / S / K / F / T hardened-tooth gear reducers

## Other types available for inquiry

NMRV worm reducersCompact aluminum housing; confirm self-locking requirements

R / S / F / K gear reducersHardened gearing and modular configurations

Cycloidal gear reducersCompact configurations for demanding loads

Planetary gear reducersPrecision, rigid configurations for servo drives

Hardened-tooth gearboxesHeavy-duty mining and building-material applications

Stepless variable-speed unitsAdjustable output speed

Integrated geared motorsIntegrated drive arrangement

Couplings / bases / lubricantsDiscuss the complete accessory package

### Check the reducer and motor together

Send the ratio, torque and output shaft arrangement so motor power and connections can be checked together.

      [13690528818](tel:13690528818)
      [View electric motors →](https://dingfeng.maisiie.cn/en/products/motors.html)

## Catalog sources and order confirmation

2025 Reducer Selection Manual. The catalog date does not indicate current stock or configuration. Original specifications and uncertainty notes are retained; verify the nameplate, certification requirements and latest manufacturer documents.

## Send your model and requirements

Overseas inquiries are welcome. Delivery is currently within China only; buyers arrange export.[Contact Dingfeng →](https://dingfeng.maisiie.cn/en/contact.html)