Harmonic Drive LLC | 42 Dunham Ridge, Beverly, MA 01915 | 800-921-3332
Harmonic Drive and Harmonic Planetary are registered trademarks of Harmonic Drive.

Series Size Ratio Type
CSF 8 50 2A-R

• Compact design
• High torque capacity
• High torsional stiffness
• Zero backlash
• High positioning accuracy
• Housed configuration is available

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 1.8 Nm
Limit for Average Torque 2.3 Nm
Limit for Repeated Peak Torque 3.3 Nm
Limit for Momentary Peak Torque 6.6 Nm
Starting Torque 0.8 Ncm
Backdriving Torque 0.5 Nm
Ave. Input Speed 3,500 rpm
Standard Accuracy 2 arc min
Mass 0.02 kg
Torsional Stiffness
T1 0.29 Nm
K1 0.04 10^4 Nm / rad
T2 0.75 Nm
K2 0.06 10^4 Nm / rad
K3 0.08 10^4 Nm / rad


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Call: 978-532-1800

Hours 8:00am - 5:00pm EST
Monday through Friday