Harmonic Drive LLC | 42 Dunham Ridge, Beverly, MA 01915 | 800-921-3332
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Series Size Ratio Type Option
SHD 20 50 2UH LW
Gear Model Number
Gear Dimensions (see drawing)
Flange Dim A - Motor Adapter Flange Bore Dia. {{foundMotor.flangeDimA}} mm
Flange Dim B - Motor Adapter Flange Bore Depth {{foundMotor.flangeDimB}} mm
Motor Dim C - Motor Bolt Circle Dia. {{foundMotor.dimC}} mm
Flange Dim D - Bolt Size {{foundMotor.flangeDimD}}
Coupling Dim F - Motor Coupling Bore Dia. {{foundMotor.couplingDimF}} mm
Mass kg
Gear Performance Data
Rated Torque L10 17 Nm
Limit for Average Torque 24 Nm
Limit for Repeated Peak Torque 39 Nm
Limit for Momentary Peak Torque 69 Nm
Starting Torque 53 Ncm
Backdriving Torque 29 Nm
Ave. Input Speed 3,500 rpm
Standard Accuracy 1 arc min
Mass 0.84 kg
Torsional Stiffness
T1 7 Nm
K1 1.1 10^4 Nm / rad
T2 25 Nm
K2 1.3 10^4 Nm / rad
K3 2 10^4 Nm / rad
Output Bearing
Pitch Circle Diameter (dp) 0.07 m
Offset (R) 0.01 m
Basic Dynamic Rated Load (C) 73 10^2 N
Basic Static Rated Load (Co) 110 10^2 N
Allowable Moment Load (Mc) 93 Nm
Moment Stiffness (Km) 21 10^4 Nm / rad


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