Strain wave servo-gearbox FHG-I-17

coaxialkeyed bore50 - 100 Nm

Introduction
The FHG-I series strain wave gearbox integrates a cam-type wave generator. The cam shaft bore can be customized to match the customer's motor model. The input shaft inserts into the wave generator inner bore and is secured by a flat key. A high-rigidity cross-roller main bearing is integrated. Typical connection methods are: rigid wheel fixed with flexspline output, or flexspline fixed with rigid wheel output.

Features

• Integrated cam wave generator for simplified installation and flexible mounting options.
• Excellent rotational and positioning accuracy (low backlash).
• High torque capacity and structural rigidity.
• Coaxial input and output for compact drive layouts.
• Customizable cam shaft bore to fit customer motor interfaces.

Starting torque (unit: cNm) — examples by size and reduction ratio
Size / 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 ratings (selected values)
FHG-14: design Mb = 41 Nm — instantaneous max Mb = 80 Nm; Ftd = 270 N — Ft max = 490 N; Fa = 270 N — Fa max = 490 N
FHG-17: design Mb = 72 Nm — instantaneous max Mb = 140 Nm; Ftd = 400 N — Ft max = 700 N; Fa = 400 N — Fa max = 700 N
FHG-20: design Mb = 140 Nm — instantaneous max Mb = 280 Nm; Ftd = 650 N — Ft max = 1150 N; Fa = 650 N — Fa max = 1150 N
FHG-25: design Mb = 243 Nm — instantaneous max Mb = 480 Nm; Ftd = 900 N — Ft max = 1600 N; Fa = 900 N — Fa max = 1600 N
FHG-32: design Mb = 460 Nm — instantaneous max Mb = 900 Nm; Ftd = 1350 N — Ft max = 2300 N; Fa = 1350 N — Fa max = 2300 N
FHG-40: design Mb = 600 Nm — instantaneous max Mb = 1200 Nm; Ftd = 2000 N — Ft max = 3500 N; Fa = 2000 N — Fa max = 3500 N

Performance — selected rated data (representative rows)
Model | Reduction ratio | Rated torque @2000 r/min (Nm / kgfm) | Peak torque start/stop (Nm / kgfm) | Max average load torque (Nm / kgfm) | Permissible input speed (Grease) r/min | Backlash (Arc Sec) | Weight (kg) | Design life (h)
14 | 50 | 7 Nm / 0.7 kgfm | 23 Nm / 2.3 kgfm | 9 Nm / 0.9 kgfm | 46 r/min | ≤20 ArcSec | 4.7 kg | 10000 h
14 | 80 | 10 Nm / 1.0 kgfm | 30 Nm / 3.1 kgfm | 14 Nm / 1.4 kgfm | 61 r/min | ≤20 ArcSec | 6.2 kg | 15000 h
17 | 50 | 21 Nm / 2.1 kgfm | 44 Nm / 4.5 kgfm | 34 Nm / 3.4 kgfm | 91 r/min | ≤20 ArcSec | 9 kg | 10000 h
20 | 50 | 33 Nm / 3.3 kgfm | 73 Nm / 7.4 kgfm | 44 Nm / 4.5 kgfm | 127 r/min | ≤20 ArcSec | 13 kg | 10000 h
25 | 50 | 51 Nm / 5.1 kgfm | 127 Nm / 13 kgfm | 72 Nm / 7.3 kgfm | 242 r/min | ≤20 ArcSec | 25 kg | 10000 h
32 | 50 | 99 Nm / 10 kgfm | 281 Nm / 29 kgfm | 140 Nm / 14 kgfm | 497 r/min | ≤20 ArcSec | 51 kg | 10000 h
40 | 50 | 178 Nm / 18 kgfm | 523 Nm / 53 kgfm | 255 Nm / 26 kgfm | 892 r/min | ≤20 ArcSec | 91 kg | 10000 h

Notes

• Integrated cam wave generator; cam shaft bore customizable to match customer motor models.
• Input shaft fits into the wave generator inner bore and connects via flat key.
• Built-in high-rigidity cross-roller main bearing.
• Connection options: rigid wheel fixed & flexspline output, or flexspline fixed & rigid wheel output.

Technical specifications

• Series: FHG (FHG-I to FHG-V variants included).
• Configuration: coaxial input and output.
• Wave generator: integrated cam structure, inner bore adaptable, flat-key connection to input shaft.
• Main bearing: integrated cross-roller bearing for increased rigidity.
• Key properties: high positioning accuracy, high torque capacity, high rigidity, compact coaxial layout.
• Available parameters by model: nominal torque, permissible peak torque, allowable radial/axial forces, multiple reduction ratios, maximum input speeds, backlash (Arc Sec), weight, design life (hours).