Harmonic gear reducer FHG-III-40

coaxialhollow-shaft100 - 200 Nm

Introduction
The FHG-III series harmonic drive features a large hollow shaft structure and an integrated sealed flange design. Components are combined into a single unit pre-filled with specialized lubricating grease to simplify equipment assembly. An internal high-rigidity cross roller bearing is integrated as the main bearing. Typical configurations use either a fixed circular spline with flexspline output or a fixed flexspline with circular spline output.

Features

• Large hollow shaft structure for cable and optical line routing
• Fully sealed integrated flange design, pre-filled with specialized lubricating grease
• Input connection via timing pulleys or gear shafts
• High rotational and positioning accuracy
• High torque capacity
• High rigidity (integrated cross roller main bearing)
• Coaxial input and output

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
FHG-14: Mbdi 41 Nm, Mb max 80 Nm; Ft di 270 N, Ft max 490 N; Fa di 270 N, Fa max 490 N
FHG-17: Mbdi 72 Nm, Mb max 140 Nm; Ft di 400 N, Ft max 700 N; Fa di 400 N, Fa max 700 N
FHG-20: Mbdi 140 Nm, Mb max 280 Nm; Ft di 650 N, Ft max 1150 N; Fa di 650 N, Fa max 1150 N
FHG-25: Mbdi 243 Nm, Mb max 480 Nm; Ft di 900 N, Ft max 1600 N; Fa di 900 N, Fa max 1600 N
FHG-32: Mbdi 460 Nm, Mb max 900 Nm; Ft di 1350 N, Ft max 2300 N; Fa di 1350 N, Fa max 2300 N
FHG-40: Mbdi 600 Nm, Mb max 1200 Nm; Ft di 2000 N, Ft max 3500 N; Fa di 2000 N, Fa max 3500 N

Rated torque, permissible peak torque, permissible max average load torque and other parameters (excerpted table rows)
Table columns: Model | Reduction ratio | Rated torque at 2000 r/min input (Nm / kgfm) | Permissible peak torque at start/stop (Nm / kgfm) | Permissible maximum value for average load torque (Nm / kgfm) | Permissible maximum input speed (Grease) (r/min) | Backlash (Arc Sec) | Weight (kg) | Design life (Hour)

Model 14 (examples): 50 → Rated torque 7 Nm / 0.7 kgfm; Permissible peak 23 Nm / 2.3 kgfm; Permissible max average torque 9 Nm / 0.9 kgfm; Permissible max input speed 8500 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 0.7, service life 10000 h
80 → Rated torque 10 Nm / 1.0 kgfm; Permissible peak 30 Nm / 3.0 kgfm; Permissible max average torque 14 Nm / 1.4 kgfm; Permissible max input speed 15000 r/min

Model 17 (examples): 50 → Rated torque 21 Nm / 2.1 kgfm; Permissible peak 44 Nm / 4.5 kgfm; Permissible max average torque 34 Nm / 3.4 kgfm; Permissible max input speed 7300 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 0.99, service life 10000 h
80 → Rated torque 29 Nm / 2.9 kgfm; Permissible peak 56 Nm / 5.7 kgfm; Permissible max average torque 35 Nm / 3.6 kgfm; Permissible max input speed 15000 r/min

Model 20 (examples): 50 → Rated torque 33 Nm / 3.3 kgfm; Permissible peak 73 Nm / 7.4 kgfm; Permissible max average torque 44 Nm / 4.5 kgfm; Permissible max input speed 6500 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 1.32, service life 10000 h

Model 25 (examples): 50 → Rated torque 51 Nm / 5.2 kgfm; Permissible peak 127 Nm / 13.0 kgfm; Permissible max average torque 72 Nm / 7.3 kgfm; Permissible max input speed 5600 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 2.02, service life 10000 h

Model 32 (examples): 50 → Rated torque 99 Nm / 10.0 kgfm; Permissible peak 281 Nm / 29.0 kgfm; Permissible max average torque 140 Nm / 14.0 kgfm; Permissible max input speed 4800 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 4.20, service life 10000 h

Model 40 (examples): 50 → Rated torque 178 Nm / 18.0 kgfm; Permissible peak 523 Nm / 53.0 kgfm; Permissible max average torque 255 Nm / 26.0 kgfm; Permissible max input speed 4000 r/min; Backlash ≤20 Arc Sec; Design life example: FHG-III 7.20, service life 10000 h

Note
The tables above are transcribed from product specification sheets and present rated torques, permissible peak torques, permissible average load torques, permissible input speeds (grease), backlash, approximate weights and indicative design life figures for FHG series models and reduction ratios.

Technical characteristics / specifications

• Series: FHG (presented version: FHG-III)
• Structure: large hollow shaft (cable/optical routing)
• Design: sealed integrated flange, factory-filled with specialized grease
• Main bearing: integrated high-rigidity cross roller bearing
• Common output configurations: fixed circular spline + flexspline output or fixed flexspline + circular spline
• Input connection: timing pulleys or gear shafts
• Accuracy: high rotational and positioning accuracy
• Torque capacity: see model tables for rated, peak and permissible average values
• Backlash: typically ≤ 20 arc sec (varies by model/version)
• Permissible input speed (grease): typically 4000–15000 r/min depending on model and reduction
• Design life: typical range 4,000–15,000 hours depending on model/reduction
• Weight: varies by model and reduction (examples in tables)