Harmonic gear reducer FHG-IV-20

coaxialsolid-shaft200 - 500 Nm

Introduction
The FHG‑IV series harmonic drive is supplied in an input‑shaft configuration with an integrated sealed flange. The unit is factory pre‑filled with specialised lubricating grease and incorporates a high‑rigidity cross‑roller main bearing for simplified equipment integration and improved structural support. Typical output arrangements are fixed circular spline + flexspline output or fixed flexspline + circular spline output.

Features

• Input‑shaft configuration with multiple connection options (timing pulley or gear shaft)
• Integrated sealed flange delivered pre‑filled with specialist grease
• High‑rigidity cross‑roller main bearing integrated in the assembly
• Low backlash and high‑precision rotation for accurate positioning (≤20 arc sec typical)
• High torque capacity across models FHG‑14, 17, 20, 25, 32, 40
• Enhanced structural rigidity and inline input/output alignment for easier integration

Specification - Starting torque of FHG series (unit: cNm)
Type / Reduction ratio | 11 | 14 | 17 | 20 | 25 | 32 | 40
50 | - | 8.8 | 27 | 36 | 56 | 85 | 136
80 | - | 7.5 | 25 | 33 | 50 | 74 | 117
100 | - | 6.9 | 24 | 32 | 49 | 72 | 112
120 | - | 6.9 | 24 | 31 | 48 | 68 | 110
160 | - | - | - | 31 | 47 | 67 | 105

Moment load table of FHT(FHG) series
Model | Design value | Instant permissible value
FHG‑14 | Mbdi 41 Nm | Mb max 80 Nm
| Ftdi 270 N | Ft max 490 N
| Fadi 270 N | Fa max 490 N
FHG‑17 | Mbdi 72 Nm | Mb max 140 Nm
| Ftdi 400 N | Ft max 700 N
| Fadi 400 N | Fa max 700 N
FHG‑20 | Mbdi 140 Nm | Mb max 280 Nm
| Ftdi 650 N | Ft max 1150 N
| Fadi 650 N | Fa max 1150 N
FHG‑25 | Mbdi 243 Nm | Mb max 480 Nm
| Ftdi 900 N | Ft max 1600 N
| Fadi 900 N | Fa max 1600 N
FHG‑32 | Mbdi 460 Nm | Mb max 900 Nm
| Ftdi 1350 N | Ft max 2300 N
| Fadi 1350 N | Fa max 2300 N
FHG‑40 | Mbdi 600 Nm | Mb max 1200 Nm
| Ftdi 2000 N | Ft max 3500 N
| Fadi 2000 N | Fa max 3500 N

Detailed performance table (selected rows / headings)
Note: columns shown correspond to the product datasheet; values are given per reduction ratio and model. Headings include Reduction ratio, Rated torque at 2000 r/min input (Nm / kgfm), Permissible peak torque at start/stop (Nm / kgfm), Permissible maximum average load torque (Nm / kgfm), Permissible maximum input rotational speed (Grease) (r/min), Backlash (Arc Sec), Weight (kg), Design life (Hour).
Model 14 (examples): 14 | 50 | 7 Nm / 0.7 kgfm | 23 Nm / 2.3 kgfm | 9 Nm / 0.9 kgfm | 46 r/min / 4.7 r/min | ≤20 Arc Sec | FHG‑I/II:0.40; FHG‑III:0.7; FHG‑IV:0.66; FHG‑V:0.40 | 10000 Hour
14 | 80 | 10 Nm / 1.0 kgfm | 30 Nm / 3.1 kgfm | 14 Nm / 1.4 kgfm | 61 r/min / 6.2 r/min | ≤20 Arc Sec | same design life columns | 15000 Hour
14 | 100 | 10 Nm / 1.0 kgfm | 36 Nm / 3.6 kgfm | 14 Nm / 1.4 kgfm | 70 r/min / 7.2 r/min | ≤20 Arc Sec | 15000 Hour

Model 17 (examples): 17 | 50 | 21 Nm / 2.1 kgfm | 44 Nm / 4.5 kgfm | 34 Nm / 3.4 kgfm | 91 r/min / 9 r/min | ≤20 Arc Sec | FHG‑I/II:0.54; FHG‑III:0.99; FHG‑IV:0.90; FHG‑V:0.62 | 10000 Hour
17 | 80 | 29 Nm / 2.9 kgfm | 56 Nm / 5.7 kgfm | 35 Nm / 3.6 kgfm | 113 r/min / 12 r/min | ≤20 Arc Sec | 15000 Hour
17 | 100 | 31 Nm / 3.2 kgfm | 70 Nm / 7.2 kgfm | 51 Nm / 5.2 kgfm | 143 r/min / 15 r/min | ≤20 Arc Sec | 15000 Hour

Model 20 (examples): 20 | 50 | 33 Nm / 3.3 kgfm | 73 Nm / 7.4 kgfm | 44 Nm / 4.5 kgfm | 127 r/min / 13 r/min | ≤20 Arc Sec | FHG‑I/II:0.72; FHG‑III:1.32; FHG‑IV:1.29; FHG‑V:0.82 | 10000 Hour
20 | 80 | 44 Nm / 4.5 kgfm | 96 Nm / 9.8 kgfm | 61 Nm / 6.2 kgfm | 165 r/min / 17 r/min | ≤20 Arc Sec | 15000 Hour
20 | 100 | 52 Nm / 5.3 kgfm | 107 Nm / 10.9 kgfm | 64 Nm / 6.5 kgfm | 191 r/min / 20 r/min | ≤20 Arc Sec | 15000 Hour

Model 25 / 32 / 40 (examples): see datasheet for full rows; values include rated torques, peak torques, permissible speeds and weights per model and reduction.

Technical specifications

• Series: FHG‑IV series harmonic drive (input shaft configuration)
• Integrated sealed flange structure; unit supplied pre‑filled with specialised lubricating grease
• Integrated high‑rigidity cross‑roller main bearing
• Typical output configurations: fixed circular spline + flexspline OR fixed flexspline + circular spline
• Input connection options: timing pulley or gear shaft; versatile input‑shaft design
• Low backlash (≤20 arc sec typical) and high‑precision rotation for accurate positioning
• Available reduction ratios: 11, 14, 17, 20, 25, 32, 40 (with common variants shown in tables)
• Rated and peak torque, permissible loads, speeds, weight and design life are model‑ and ratio‑dependent (refer to datasheet tables)