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
FR 20 128 2-GR

• Maximum reduction ratio in minimum space
• Low backlash
• Simple installation and maintenance

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 40 Nm
Limit for Average Torque 49 Nm
Limit for Repeated Peak Torque 67 Nm
Limit for Momentary Peak Torque 102 Nm
Backdriving Torque Nm
Ave. Input Speed 2,500 rpm
Gear Backlash < 1.5 arc min
Mass 0.5 kg
Torsional Stiffness
T1 2 Nm
K1 0.81 10^4 Nm / rad
T2 23 Nm
K2 2.8 10^4 Nm / rad
K3 3 10^4 Nm / rad

Contact

Contact Us

Submit a Question

info@harmonicdrive.net

or
Call: 978-532-1800

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