Harmonic gear reducer FHD-17

coaxialhollow-shaft50 - 100 Nm

Introduction
The FHD series harmonic reducer uses an ultra-short top-hat flexspline design for applications requiring extreme compactness and low weight. The FHD combined type achieves an ultra-flat profile with axial length approximately 50% shorter than the FHG series. Output side employs high-rigidity cross roller bearings, making the unit suitable for space-constrained installations.

Features

• Ultra-thin profile with hollow structure
• Compact, streamlined housing
• High torque capacity with zero backlash
• High rigidity via cross roller output bearings
• Coaxial input and output

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

Mechanical limits by 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 overview (selected values)
Model 14 (reduction ratios 50/80/100): Rated torque 3.7 / 5.1 / 5.4 Nm; Peak torque 12 / 15 / 19 Nm; Permissible average load 4.8 / 6.2 / 7.7 Nm; Momentary torque 23 / 29 / 35 Nm; Max input speed 8500 r/min (model dependent); Average input speed 3500 r/min; Backlash ≤20 arc sec; Weights FHD-I:0.34 kg, FHD-II:0.64 kg; Design life 9000–10000 h
Model 17 (50/80/100): Rated torque 11 / 14 / 16 Nm; Peak torque 23 / 29 / 37 Nm; Permissible average load 18 / 21 / 27 Nm; Momentary torque 48 / 54 / 71 Nm; Max input speed 7300 r/min; Average input 3500 r/min; Backlash ≤20 arc sec; Weights FHD-I:0.42 kg, FHD-II:0.87 kg; Design life 9000–10000 h
Model 20 (50/80/100): Rated torque 17 / 23 / 28 Nm; Peak torque 39 / 49 / 57 Nm; Permissible average load 24 / 28 / 34 Nm; Momentary torque 69 / 78 / 95 Nm; Max input speed 6500 r/min; Average input 3500 r/min; Backlash ≤20 arc sec; Weights FHD-I:0.54 kg, FHD-II:1.14 kg; Design life 9000–10000 h
Model 25 (50/80/100): Rated torque 27 / 42 / 47 Nm; Peak torque 69 / 91 / 110 Nm; Permissible average load 38 / 62 / 75 Nm; Momentary torque 127 / 157 / 184 Nm; Max input speed 5600 r/min; Average input 3500 r/min; Backlash ≤20 arc sec; Weights FHD-I:0.95 kg, FHD-II:1.75 kg; Design life 9000–10000 h
Model 32 (50/80/100): Rated torque 53 / 79 / 96 Nm; Peak torque 151 / 202 / 233 Nm; Permissible average load 75 / 126 / 151 Nm; Momentary torque 268 / 350 / 420 Nm; Max input speed 4800 r/min; Average input 3500 r/min; Backlash ≤20 arc sec; Weights FHD-I:1.90 kg, FHD-II:3.56 kg; Design life 9000–10000 h

Technical specifications

• Series: FHD
• Design: Ultra-short top-hat flexspline, ultra-thin hollow structure
• Axial length approx. 50% shorter than FHG series
• Output: high-rigidity cross roller bearings
• Key properties: compact footprint, lightweight construction, high torque, high rigidity, zero backlash, coaxial input/output
• Available sizes: FHD-14, FHD-17, FHD-20, FHD-25, FHD-32
• Typical max input speeds (grease): up to 8500 r/min depending on model
• Design life: typically 9000–10000 hours depending on model and reduction ratio