Servo Mount Gearheads

HPN-L Face-Mount Harmonic Planetary Gearbox Value Series

Face-mount value series helical planetary gearbox in 5 frame sizes with ratios 3:1 to 50:1 peak torque 9 to 752 Nm backlash less than 5 arc-min with fast delivery and competitive pricing

ModelHPN-L
SeriesHPN-L Series
Global Stock Network Custom Gear Ratios Application Engineering STO Safety Compliant
HPN-L product image 1
HPN-L
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Product Overview

The HPN-L face-mount Harmonic Planetary value series gearbox provides low cost without compromising quality or performance. Features helical gears for high torque quiet operation and long life. Available in 5 frame sizes ratios 3:1 to 50:1 peak torque 9 to 752 Nm backlash less than 5 arc-min single stage less than 7 arc-min two stage. Quick Connect motor mounting fast delivery.

The HPN-L is a fully integrated rotary actuator combining servo motor, harmonic gear reducer, encoders, servo electronics, and compact mechanical packaging in a single assembly.

📐
Outer Diameter
⚖️
Weight
🔩
Hollow Shaft
18 mm
💪
Max Torque
🔄
Max Speed
⚙️
Gear Ratios
🎯
Output Type
Integrated robot joint module

Servo Mount Gearhead Architecture

Harmonic Planetary and Harmonic Drive gearheads mount directly to standard servo motors using a flange or shaft input interface. The Quick Connect coupling system allows motor exchange without realignment. The cross roller output bearing provides direct load support.

Quick Connect Motor Mount

Rapid motor exchange without realignment tools, compatible with most servo motor flange standards.

🎯

Low Backlash

Less than 3 arc-min standard. Less than 1 arc-min available as an option on most series.

🔩

Cross Roller Output

Integrated cross roller bearing supports radial, axial, and moment loads without additional bearings.

📡

Continuous Compensation

Continuous backlash compensation maintains low backlash throughout the gear life.

🔄

High Torsional Stiffness

High stiffness minimises compliance in the drive train for precise dynamic positioning.

🔧

Grease Lubricated for Life

No maintenance lubrication required over the operating life of the gearhead.

Typical Applications

The HPN-L suits servo motor driven robot joints, precision index tables, semiconductor wafer stages, laser beam steering, AGV and AMR propulsion drives, and any precision motion application requiring a servo mount gearhead with low backlash and high moment stiffness.

Key Specifications

Critical performance parameters at a glance

📊
Face-mount inline L configuration
Mounting Type
📊
5 sizes: 11 14 20 32 40 (42-142mm)
Available Frame Sizes
📊
3:1 to 50:1
Gear Ratio Range
📊
9 Nm to 752 NmNm
Peak Torque Range
📊
Less than 5 arc-minarc-min
Backlash Single Stage
📊
Less than 7 arc-minarc-min
Backlash Two Stage
📊
Helical gears for high torque quiet performance long life
Gear Type
📊
HPN-L is inline face-mount HPN-RA is right angle 90 degree
vs HPN-RA

Technical Specifications

Overview

Mounting Type
Face-mount inline L configuration
Available Frame Sizes
5 sizes: 11 14 20 32 40 (42-142mm)
Gear Ratio Range
3:1 to 50:1
Peak Torque Range
9 Nm to 752 Nm Nm
Backlash Single Stage
Less than 5 arc-min arc-min
Backlash Two Stage
Less than 7 arc-min arc-min
Gear Type
Helical gears for high torque quiet performance long life
vs HPN-RA
HPN-L is inline face-mount HPN-RA is right angle 90 degree

Size 11 Performance

Size 11 Min Peak Torque
9 Nm
Size 11 Max Input Speed
10000 rpm

Size 40 Performance

Size 40 Peak Torque
752 Nm
Size 40 Max Rated Torque L50
700 Nm
Size 40 Max Input Speed
6000 rpm

Product Attributes

Product Type
Face-Mount Harmonic Planetary Gearbox Value Series
Mount Type
Face-mount inline L configuration
Backlash
Less than 5 arc-min single stage less than 7 arc-min two stage
Peak Torque Range
9 to 752 Nm
vs HPN-RA
Inline vs right angle configuration
Manufacturer
Harmonic Drive LLC

Industrial Applications

These servo-mount gearheads are used where motor compatibility, compact packaging, and precision motion transmission are needed in a complete gearbox format.

⚙️

Servo Axis Reduction

Pairs with servo motors in factory automation, robotics, and machinery where reduced speed and increased output torque are required.

Servo motorTorque multiplicationAutomation
🏭

Packaging & Converting

Supports motion axes in packaging, labelling, and converting systems where compact drivetrains and stable positioning are essential.

PackagingConvertingPrecision
🤖

Robot Peripheral Axes

Used on auxiliary axes, end-of-arm devices, and support mechanisms that need precise servo-driven output motion.

RoboticsPeripheral motionCompact
📍

Index Tables & Feed Systems

Works well in indexing mechanisms, feeders, and transfer systems where repeatable angular motion is important.

IndexingFeed systemsRepeatability
🧰

OEM Motion Modules

Simplifies motion subsystem design for OEMs needing a packaged reducer with predictable motor-mount integration.

OEMPackaged reducerMotor mount
🔬

Precision Equipment

Supports analytical, optical, and specialty machinery requiring compact servo-ready reduction stages.

PrecisionOpticsCompact
Customization Available

Factory Modification & Custom Sourcing

This product supports custom configurations and equivalent sourcing

Available Modifications

  • Torque and speed ratio customization
  • Mounting interface modifications
  • Connector and wiring specifications
  • Housing and enclosure options

Sourcing Options

  • Standard product sourcing
  • Equivalent product identification
  • Replacement part sourcing
  • Volume pricing (MOQ may apply)

Request Pricing & Availability

Submit an RFQ for standard products, custom configurations, or equivalent alternatives

Expert Answers

Frequently Asked Questions

Technical answers sourced from engineering specifications and integration guides.

The HPN-L is the face-mount value series Harmonic Planetary gearbox with helical gears for high torque, quiet operation, and long life.

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