GSW 55 A ∅ 55 mm, strain wave gearhead Zero backlash
M 5:2
Stock program Standard program Special program (on request)
Part numbers
863427 863428 863429 50:1 80:1 100:1 4.8 7.7 7.7 12.0 16.0 19.0 24.0 35.0 35.0 3500 3500 3500 8500 8500 8500 72 72 75 300 300 300 43.0 42.0 42.0 30.3 30.3 30.3 1.5 1.5 1.5 0.10 0.10 0.10 1.0 1.0 1.0 0.29 0.40 0.40 0.37 0.44 0.44 0.47 0.61 0.61 1.6 1.6 1.6 3.2 3.2 3.2 33.0 28.5 21.0 2.0 2.0 2.3 60 75 55 190 190 190
Gearhead data 1 Reduction 2 Max. continuous torque 3 Max. intermittent torque 4 Max. overload torque 5 Max. continuous input speed Max. intermittent input speed 6 Max. efficiency 7 Weight 8 Mass moment of inertia 9 Gearhead length L11 10 Mech. positioning accuracy 11 Mech. repeatability 12 Hysteresis loss 13 Torsional rigidity C1
Nm Nm Nm rpm rpm
% g
gcm2 mm
arcmin arcmin arcmin
104 Nm/rad 104 Nm/rad 104 Nm/rad
Torsional rigidity C2 Torsional rigidity C3
14 Torque M1 Torque M2
Nm Nm Nm mNm
15 Starting torque, no load 16 Backdriving torque, no load 17 Ratcheting torque 18 Buckling torque
Nm Nm
Technical data 19 Bearing at output 20 Tilting rigidity 21 Max. tilting torque
Modular system
cross roller bearings BLDC Motors
9.0 Nm/arcmin 137–138_ECX FLAT 42 28.0 Nm 190_ECX PRIME 30 L 1650 N 201–206_EC-i 40 3300 N 207–208_EC-i 52 1890 N 226–227_ECX FLAT 42 M
2140 N 10 mm 34.7 mm -40…+100 °C 22 Max. radial load 23 Max. axial load 24 Dynamic load rating 25 Static load rating 26 Distance rolling bearing center to output 27 Pitch diameter 28 Ambient temperature Additional information Explanation of the line numbers and additional information on page 358.
¹This length may vary depending on the configuration and choice of motor. The effective length is calculated at the end of the configuration process.
maxon 393
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