Strain wave servo-gearbox FSG-II-20

coaxialhollow-shaftkeyed bore

Introduction
The FSG‑II series strain wave gearbox uses a cross‑slider coupling for the wave generator. Cam shaft bore dimensions are customizable to match specific motor models. The input shaft engages the wave generator inner bore via a keyed connection. Typical configuration: circular spline fixed at the base and flexspline as the output, providing coaxial input and output.

Features

• Wave generator with integrated cam structure for improved tolerance to machining variation and self‑alignment to maintain required coaxiality.
• High torque capacity in a compact mechanical envelope.
• Precise rotation and positioning with low backlash (≤ 20 arc sec typical by model).
• Coaxial input and output for straightforward integration into robotic wrists or rotary modules.
• Common applications: robot arm end‑effectors and sealed rotary tables.

Specification - Starting torque (unit: cNm)
Reduction ratio | 11 | 14 | 17 | 20 | 25 | 32 | 40
50 | — | 4.5 | 6.7 | 8.6 | 17 | 34 | 61
80 | — | 3.1 | 4.4 | 5.4 | 10 | 21 | 39
100 | — | 2.8 | 3.7 | 4.7 | 8.8 | 20 | 34
120 | — | — | 3.4 | 4.2 | 8 | 17 | 31
160 | — | — | — | — | 3.6 | 6.9 | 15 | 26

Specification - Sheet 2 (design values / instantaneous permissible values)
FSG-14 — Mb di 20 Nm ; Mb max 40 Nm; Ft di 180 N ; Ft max 320 N; Fa di 180 N ; Fa max 320 N
FSG-17 — Mb di 30 Nm ; Mb max 60 Nm; Ft di 230 N ; Ft max 400 N; Fa di 230 N ; Fa max 400 N
FSG-20 — Mb di 42 Nm ; Mb max 80 Nm; Ft di 270 N ; Ft max 480 N; Fa di 270 N ; Fa max 480 N
FSG-25 — Mb di 80 Nm ; Mb max 160 Nm; Ft di 440 N ; Ft max 770 N; Fa di 440 N ; Fa max 770 N
FSG-32 — Mb di 220 Nm ; Mb max 440 Nm; Ft di 900 N ; Ft max 1600 N; Fa di 900 N ; Fa max 1600 N
FSG-40 — Mb di 320 Nm ; Mb max 650 Nm; Ft di 1000 N ; Ft max 1750 N; Fa di 1000 N ; Fa max 1750 N

Specification - Sheet 3 (performance summary)
Columns: Model | Reduction ratio | Rated torque (@2000 r/min input) Nm | Rated torque kgfm | Peak torque at start/stop Nm | Peak torque kgfm | Permissible max average load torque Nm | Permissible max average load kgfm | Permissible max momentary torque Nm | Permissible max momentary kgfm | Permissible max input speed (Grease) r/min | Permissible average input speed (Grease) r/min | Backlash Arc Sec | Weight (kg) / note | Design life Hour
Examples (selected rows from original table): 14 | 50 | 7 Nm | 0.7 kgfm | 23 Nm | 2.3 kgfm | 9 Nm | 0.9 kgfm | 46 Nm | 4.7 kgfm | 8500 | 3500 | ≤20 | FSG-I/II:0.51 | 10000
25 | 80 | 82 Nm | 8.4 kgfm | 178 Nm | 18 kgfm | 113 Nm | 12 kgfm | 332 Nm | 34 kgfm | 15000 | — | ≤20 | FSG-I/II:1.46 | 10000
32 | 120 | 178 Nm | 18 kgfm | 459 Nm | 47 kgfm | 281 Nm | 29 kgfm | 892 Nm | 91 kgfm | 15000 | — | ≤20 | FSG-I/II:3.11 | 15000
40 | 100 | 345 Nm | 35 kgfm | 738 Nm | 75 kgfm | 484 Nm | 49 kgfm | 1400 Nm | 143 kgfm | 15000 | — | ≤20 | FSG-I:4.60 | 15000

Characteristics / technical specifications

• Series: FSG‑II strain wave gearbox.
• Wave generator: integrated cam structure, self‑aligning, tolerant to machining precision.
• Input coupling: cross‑slider coupling; input shaft to wave generator inner bore via keyed connection.
• Cam shaft bore: customizable to match specific motor models for direct integration.
• Typical configuration: circular spline fixed at base, flexspline as output (coaxial input and output).
• Available models: FSG‑14, FSG‑17, FSG‑20, FSG‑25, FSG‑32, FSG‑40; reduction ratios and variants up to 160 available per specification tables.
• Performance data: detailed torque ratings, permissible loads, speeds, backlash, weight and design life values provided in specification tables above.
• Typical applications: robot arm end‑effectors, sealed rotary tables and other installations requiring compact, high‑torque, precise gearing.