Strain wave servo-gearbox FSG-II-17

coaxialkeyed bore10 - 20 Nm

Introduction
The FSG-II series strain wave gear utilizes a cross slider coupling mechanism for its wave generator. The cam shaft bore dimensions can be customized to accommodate specific motor models. The input shaft directly engages with the wave generator’s inner bore through a keyed connection. This configuration is typically implemented with the circular spline fixed at the base and the flexspline serving as the output end.

Features

• The wave generator adopts an integrated cam structure, providing greater tolerance to machining precision, enabling self-aligning capability, and maintaining coaxial alignment within required specifications.
• Higher torque capacity with optimized compact design.
• Excellent rotational and positioning accuracy.
• Coaxial input and output.
• Commonly used in robotic arm end-effectors or sealed rotary tables.

Specification - Sheet 1 (Starting torque of FSG series; unit: cNm)
Reduction ratio header: 11, 14, 17, 20, 25, 32, 40
Size 50: 11: — ; 14: 4.5 ; 17: 6.7 ; 20: 8.6 ; 25: 17 ; 32: 34 ; 40: 61
Size 80: 11: — ; 14: 3.1 ; 17: 4.4 ; 20: 5.4 ; 25: 10 ; 32: 21 ; 40: 39
Size 100: 11: — ; 14: 2.8 ; 17: 3.7 ; 20: 4.7 ; 25: 8.8 ; 32: 20 ; 40: 34
Size 120: 11: — ; 14: — ; 17: 3.4 ; 20: 4.2 ; 25: 8.0 ; 32: 17 ; 40: 31
Size 160: 11: — ; 14: — ; 17: — ; 20: 3.6 ; 25: 6.9 ; 32: 15 ; 40: 26

Specification - Sheet 2 (Instant/permissible values by model)
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 / rated & permissible torques, speeds, backlash, weight, design life)
Notes: columns shown per model: Reduction ratio / Rated torque @2000 r/min (Nm / kgfm) / Permissible peak torque at start & stop (Nm / kgfm) / Permissible max average load torque (Nm / kgfm) / Permissible maximum momentary torque (Nm / kgfm) / Perm. max input speed (Grease) r/min / Perm. average input speed (Grease) r/min / Backlash (Arc Sec) / Weight (kg) / Design life (Hour).

FSG-14:
- Reduction 50: Rated torque 7 Nm (0.7 kgfm); Peak 23 Nm (2.3 kgfm); Avg permissible 9 Nm (0.9 kgfm); Momentary 46 Nm (4.7 kgfm).
- Reduction 80: Rated torque 10 Nm (1.0 kgfm); Peak 30 Nm (3.1 kgfm); Avg permissible 14 Nm (1.4 kgfm); Momentary 58 Nm (5.9 kgfm).
- Reduction 100: Rated torque 10 Nm (1.0 kgfm); Peak 36 Nm (3.6 kgfm); Avg permissible 14 Nm (1.4 kgfm); Momentary 58 Nm (5.9 kgfm).
- Reduction 120: Rated torque 10 Nm (1.0 kgfm); Peak 36 Nm (3.6 kgfm); Avg permissible 14 Nm (1.4 kgfm); Momentary 58 Nm (5.9 kgfm).
General (FSG-14): Perm. max input speed (Grease) 8500 r/min; Perm. average input speed 3500 r/min; Backlash ≤20 arc sec; Weight (FSG-I/II) 0.51 kg; Design life 10000 h.

FSG-17:
- Reduction 50: Rated torque 21 Nm (2.1 kgfm); Peak 44 Nm (4.5 kgfm); Avg permissible 34 Nm (3.4 kgfm); Momentary 91 Nm (9.0 kgfm).
- Reduction 80: Rated torque 29 Nm (2.9 kgfm); Peak 56 Nm (5.7 kgfm); Avg permissible 35 Nm (3.6 kgfm); Momentary 109 Nm (11 kgfm).
- Reduction 100: Rated torque 31 Nm (3.2 kgfm); Peak 70 Nm (7.2 kgfm); Avg permissible 51 Nm (5.2 kgfm); Momentary 109 Nm (11 kgfm).
- Reduction 120: Rated torque 31 Nm (3.2 kgfm); Peak 70 Nm (7.2 kgfm); Avg permissible 51 Nm (5.2 kgfm); Momentary 109 Nm (11 kgfm).
General (FSG-17): Perm. max input speed (Grease) 7300 r/min; Perm. average input speed 3500 r/min; Backlash ≤20 arc sec; Weight (FSG-I/II) 0.67 kg; Design life 10000 h.

FSG-20:
- Reduction 50: Rated torque 33 Nm (3.3 kgfm); Peak 73 Nm (7.4 kgfm); Avg permissible 44 Nm (4.5 kgfm); Momentary 127 Nm (13 kgfm).
- Reduction 80: Rated torque 44 Nm (4.5 kgfm); Peak 96 Nm (9.8 kgfm); Avg permissible 61 Nm (6.2 kgfm); Momentary 165 Nm (17 kgfm).
- Reduction 100: Rated torque 52 Nm (5.3 kgfm); Peak 107 Nm (10.9 kgfm); Avg permissible 64 Nm (6.5 kgfm); Momentary 191 Nm (20 kgfm).
- Reduction 120: Rated torque 52 Nm (5.3 kgfm); Peak 113 Nm (11.5 kgfm); Avg permissible 64 Nm (6.5 kgfm); Momentary 191 Nm (20 kgfm).
General (FSG-20): Perm. max input speed (Grease) 6500 r/min; Perm. average input speed 3500 r/min; Backlash ≤20 arc sec; Weight (FSG-I/II) 0.96 kg; Design life 10000 h.

FSG-25:
- Reduction 50: Rated torque 51 Nm (5.2 kgfm); Peak 127 Nm (13 kgfm); Avg permissible 72 Nm (7.3 kgfm); Momentary 242 Nm (25 kgfm).
- Reduction 80: Rated torque 82 Nm (8.4 kgfm); Peak 178 Nm (18 kgfm); Avg permissible 113 Nm (12 kgfm); Momentary 332 Nm (34 kgfm).
- Reduction 100: Rated torque 87 Nm (8.9 kgfm); Peak 204 Nm (21 kgfm); Avg permissible 140 Nm (14 kgfm); Momentary 369 Nm (38 kgfm).
- Reduction 120: Rated torque 87 Nm (8.9 kgfm); Peak 217 Nm (22 kgfm); Avg permissible 140 Nm (14 kgfm); Momentary 395 Nm (40 kgfm).
General (FSG-25): Perm. max input speed (Grease) 5600 r/min; Perm. average input speed 3500 r/min; Backlash ≤20 arc sec; Weight (FSG-I/II) 1.46 kg; Design life 10000 h.

FSG-32:
- Reduction 50: Rated torque 99 Nm (10.0 kgfm); Peak 281 Nm (29 kgfm); Avg permissible 140 Nm (14 kgfm); Momentary 497 Nm (51 kgfm).
- Reduction 80: Rated torque 153 Nm (16 kgfm); Peak 395 Nm (40 kgfm); Avg permissible 217 Nm (22 kgfm); Momentary 738 Nm (75 kgfm).
- Reduction 100: Rated torque 178 Nm (18 kgfm); Peak 433 Nm (44 kgfm); Avg permissible 281 Nm (29 kgfm); Momentary 841 Nm (86 kgfm).
- Reduction 120: Rated torque 178 Nm (18 kgfm); Peak 459 Nm (47 kgfm); Avg permissible 281 Nm (29 kgfm); Momentary 892 Nm (91 kgfm).
General (FSG-32): Perm. max input speed (Grease) 4800 r/min; Perm. average input speed 3500 r/min; Backlash ≤20 arc sec; Weight (FSG-I/II) 3.11 kg; Design life 15000 h.

FSG-40:
- Reduction 50: Rated torque 178 Nm (18 kgfm); Peak 523 Nm (53 kgfm); Avg permissible 255 Nm (26 kgfm); Momentary 892 Nm (91 kgfm).
- Reduction 80: Rated torque 268 Nm (27 kgfm); Peak 675 Nm (69 kgfm); Avg permissible 369 Nm (38 kgfm); Momentary 1270 Nm (130 kgfm).
- Reduction 100: Rated torque 345 Nm (35 kgfm); Peak 738 Nm (75 kgfm); Avg permissible 484 Nm (49 kgfm); Momentary 1400 Nm (143 kgfm).
- Reduction 120: Rated torque 382 Nm (39 kgfm); Peak 802 Nm (82 kgfm); Avg permissible 586 Nm (60 kgfm); Momentary 1510 Nm (154 kgfm).
General (FSG-40): Perm. max input speed (Grease) 4000 r/min; Perm. average input speed 3000 r/min; Backlash ≤20 arc sec; Weight (FSG-I) 4.60 kg (noted FSG-I weight variant); Design life 15000 h.

Caractéristiques / spécifications techniques

• Series / Model: FSG-II series strain wave gear (denomination: FSG-II).
• Wave generator: cross slider coupling mechanism; integrated cam structure; customizable cam shaft bore for motor matching.
• Input: keyed connection directly into wave generator inner bore.
• Configuration: circular spline usually fixed at base; flexspline as output.
• Applications: robotic arm end-effectors, sealed rotary tables, precision rotary actuation.
• Available sizes / model families: FSG-14, FSG-17, FSG-20, FSG-25, FSG-32, FSG-40.
• Starting torque (cNm) matrix by size and reduction ratio: see Specification - Sheet 1 above.
• Instant / permissible static loads (Mb, Ft, Fa) for each model: see Specification - Sheet 2 above.
• Performance matrix (rated torque, permissible peak, permissible average, permissible momentary, speeds, backlash, weight, design life) by model and reduction ratio: see Specification - Sheet 3 above.
• Backlash: ≤20 arc sec (typical across models as indicated).
• Typical maximum input speeds (Grease) vary by model (examples: FSG-14: 8500 r/min; FSG-17: 7300 r/min; FSG-20: 6500 r/min; FSG-25: 5600 r/min; FSG-32: 4800 r/min; FSG-40: 4000 r/min).