Harmonic Drive LLC | 247 Lynnfield St. Peabody, MA 01960 | 800-921-3332
Harmonic Drive and Harmonic Planetary are registered trademarks of Harmonic Drive LLC.


Series Size Version Ratio Type
HPG 65 A 40 U1
  • High Efficiency
  • Low Backlash
  • High load capacity output bearing
**Drawing does not include modified features for mounting the selected motor.

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 640 Nm
Rated Torque L50 1,320 Nm
Limit for Average Torque 1,300 Nm
Limit for Repeated Peak Torque 1,900 Nm
Limit for Momentary Peak Torque 4,500 Nm
Starting Torque 193 Ncm
Backdriving Torque 77 Nm
Max. Input Speed 3,000 rpm
Ave. Input Speed 2,000 rpm
Standard Accuracy 3 arc min
Gear Backlash < 3 arc min
Input Inertia 16 kg-cm^2
Mass 48 kg
Torsional Stiffness
K1 125 10^4 Nm / rad
Output Bearing
Pitch Circle Diameter (dp) 0.17 m
Basic Dynamic Rated Load (C) 906 10^2 N
Basic Static Rated Load (Co) 1,480 10^2 N
Allowable Moment Load (Mc) 3,900 Nm
Moment Stiffness (Km) 364 10^4 Nm / rad
Permissible Radial Load 17,600 N
Permissible Axial Load 26,300 N

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