Harmonic gear reducer FHD series

coaxialhollow-shaft500 - 1000 Nm

Introduction
The FHD Series harmonic reducer employs an ultra-short top-hat flexspline design for applications requiring extreme compactness and light weight. The FHD combined type pursues a flat-profile layout with axial length reduced by approximately 50% compared to the FHG series. Output side high-rigidity cross roller bearings make the FHD well suited to space-constrained installations.

Features

• Ultra-thin hollow profile
• Compact, streamlined footprint
• High torque capacity with zero backlash (≤20 arc sec)
• High output rigidity via cross roller bearings
• Coaxial input/output

Starting torque (unit: cNm) — FHD series
Reduction ratio: 14 | 17 | 20 | 25 | 32
Type 50: 6.2 | 19 | 25 | 39 | 60
Type 80: 5 | 16 | 23 | 36 | 55
Type 100: 4.8 | 17 | 22 | 34 | 50

Mechanical limits / Instant permissible values (per model)
FHD-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
FHD-17: Mb di 59 Nm; Mb max 140 Nm; Ft di 330 N; Ft max 570 N; Fa di 330 N; Fa max 570 N
FHD-20: Mb di 117 Nm; Mb max 230 Nm; Ft di 550 N; Ft max 975 N; Fa di 550 N; Fa max 975 N
FHD-25: Mb di 213 Nm; Mb max 420 Nm; Ft di 790 N; Ft max 1400 N; Fa di 790 N; Fa max 1400 N
FHD-32: Mb di 400 Nm; Mb max 800 Nm; Ft di 1240 N; Ft max 2100 N; Fa di 1240 N; Fa max 2100 N

Performance table (selected rows)
Model | Reduction ratio | Rated torque at 2000 r/min (Nm) | Permissible peak torque at start/stop (Nm) | Permissible max average load torque (Nm) | Permissible max momentary torque (Nm) | Permissible max input speed (Grease) r/min | Permissible avg input speed (Grease) r/min | Backlash (Arc Sec) | Weight (Kg) | Design life (Hour)
14 | 50 | 3.7 | 12 | 4.8 | 23 | 8500 | 3500 | ≤20 | FHD-I:0.34; FHD-II:0.64 | 9000
14 | 80 | 5.1 | 15 | 6.2 | 29 | 10000 | 3500 | ≤20 | FHD-I:0.34; FHD-II:0.64 | 10000
14 | 100 | 5.4 | 19 | 7.7 | 35 | 10000 | 3500 | ≤20 | FHD-I:0.34; FHD-II:0.64 | 10000
17 | 50 | 11 | 23 | 18 | 48 | 7300 | 3500 | ≤20 | FHD-I:0.42; FHD-II:0.87 | 9000
17 | 80 | 14 | 29 | 21 | 54 | 10000 | 3500 | ≤20 | FHD-I:0.42; FHD-II:0.87 | 10000
17 | 100 | 16 | 37 | 27 | 71 | 10000 | 3500 | ≤20 | FHD-I:0.42; FHD-II:0.87 | 10000
20 | 50 | 17 | 39 | 24 | 69 | 6500 | 3500 | ≤20 | FHD-I:0.54; FHD-II:1.14 | 9000
20 | 80 | 23 | 49 | 28 | 78 | 10000 | 3500 | ≤20 | FHD-I:0.54; FHD-II:1.14 | 10000
20 | 100 | 28 | 57 | 34 | 95 | 10000 | 3500 | ≤20 | FHD-I:0.54; FHD-II:1.14 | 10000
25 | 50 | 27 | 69 | 38 | 127 | 5600 | 3500 | ≤20 | FHD-I:0.95; FHD-II:1.75 | 9000
25 | 80 | 42 | 91 | 62 | 157 | 10000 | 3500 | ≤20 | FHD-I:0.95; FHD-II:1.75 | 10000
25 | 100 | 47 | 110 | 75 | 184 | 10000 | 3500 | ≤20 | FHD-I:0.95; FHD-II:1.75 | 10000
32 | 50 | 53 | 151 | 75 | 268 | 4800 | 3500 | ≤20 | FHD-I:1.90; FHD-II:3.56 | 9000
32 | 80 | 79 | 202 | 126 | 350 | 10000 | 3500 | ≤20 | FHD-I:1.90; FHD-II:3.56 | 10000
32 | 100 | 96 | 233 | 151 | 420 | 10000 | 3500 | ≤20 | FHD-I:1.90; FHD-II:3.56 | 10000

Technical specifications

• Series: FHD
• Ultra-short top-hat flexspline design for compactness and lightweight
• Axial length approx. 50% shorter than FHG series
• High-rigidity cross roller bearings on output side
• Ultra-thin hollow structure
• Zero backlash (≤20 arc sec)
• Coaxial input/output
• Weight variants per model (FHD-I, FHD-II)
• Design life examples provided per model/ratio in table