Harmonic servo-gearbox FHG-III-32

coaxialhollow-shaftflange-mounted

Introduction
The FHG-III series harmonic drive features a large hollow shaft structure with an integrated sealed flange pre-filled with specialized lubricating grease to simplify equipment assembly. An internal high‑rigidity cross roller bearing is incorporated as the main bearing. Typical output configurations include fixed circular spline with flexspline output or fixed flexspline with circular spline output.

Features

• Large hollow shaft enabling cable and optical line routing
• Fully sealed, integrated flange design pre-filled with specialized grease
• Input via timing pulley or gear shaft; coaxial input/output
• Excellent rotational and positioning accuracy
• High torque capacity and high rigidity
• Low backlash (≤20 Arc Sec in many sizes)

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

Performance / Rated torque and limits (selected table rows)
Model 14, Reduction 50: Rated torque 7 Nm; Peak start/stop 23 Nm; Max average 9 Nm; Max input speed (grease) up to 8500–15000 r/min depending on ratio; Backlash ≤20 Arc Sec; Weight ~4.7 kg; Design life example FHG-III: 0.7 (10000 h in some configs)
Model 17, Reduction 50: Rated torque 21 Nm; Peak 44 Nm; Max average 34 Nm; Max input speed example 7300–15000 r/min; Design life FHG-III: 0.99
Model 20, Reduction 50: Rated torque 33 Nm; Peak 73 Nm; Max average 44 Nm; Max input speed example 6500–15000 r/min; Design life FHG-III: 1.32
Model 25, Reduction 50: Rated torque 51 Nm; Peak 127 Nm; Max average 72 Nm; Max input speed example 5600–15000 r/min; Design life FHG-III: 2.02
Model 32, Reduction 50: Rated torque 99 Nm; Peak 281 Nm; Max average 140 Nm; Max input speed example 4800–15000 r/min; Design life FHG-III: 2.54
Model 40, Reduction 50: Rated torque 178 Nm; Peak 523 Nm; Max average 255 Nm; Max input speed example 4000–15000 r/min; Design life FHG-III: 7.20

Technical specifications

• Series: FHG-III (large hollow shaft variant)
• Structure: large hollow shaft for cable/optical routing; integrated sealed flange
• Lubrication: pre-filled with specialized grease
• Main bearing: integrated high‑rigidity cross roller bearing
• Output configurations: fixed circular spline + flexspline or fixed flexspline + circular spline
• Input options: timing pulley or gear shaft; coaxial input/output
• Key data: starting torque, moment/load limits, rated/peak torques, permissible input speeds, backlash, weight and design life vary by model and ratio (see tables above)

General remarks
The series is supplied pre-filled with special grease and includes a high‑rigidity cross roller main bearing. Select model and reduction ratio according to the provided torque, moment and speed tables for precise application sizing.