Component Sets

SHG-2A High Torque Silk Hat Component Set

High torque zero backlash silk hat component gear set with large through hole and brim mounting surface for heavy duty direct machine integration

ModelSHG-2A
SeriesSHG Series
Global Stock Network Custom Gear Ratios Application Engineering STO Safety Compliant
SHG-2A product image 1
SHG-2A
Model

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Product Overview

The SHG-2A is the high torque version of the SHF-2A silk hat component gear set. Available in 10 sizes from 14 to 65mm with reduction ratios 50:1 to 160:1, the SHG offers peak torques from 23 to 6,175 Nm. Made up of just 3 simple parts for direct machine integration.

The SHG-2A is a precision component set intended for OEM integration where the surrounding housing, motor, and support structure are designed directly into the host machine.

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Outer Diameter
⚖️
Weight
🔩
Hollow Shaft
💪
Max Torque
🔄
Max Speed
⚙️
Gear Ratios
See product specs
🎯
Output Type
Component set

OEM Component Integration

Harmonic Drive component sets provide the core strain wave gear elements for direct integration into OEM machine designs. The components integrate directly into the host structure, eliminating a separate gearbox housing and reducing system mass and axial length.

🌀

Wave Generator

Elliptical cam assembly — the input element that creates the strain wave motion.

🔧

Flexspline

Thin-walled flexible steel cup or hat — the output element with slightly fewer teeth.

Circular Spline

Rigid ring gear — the fixed element that establishes the gear ratio through tooth count difference.

🎯

Zero Backlash

Tooth engagement across the full mesh arc eliminates backlash inherently.

📐

Direct Integration

Components integrate into the host structure without a separate gearbox housing.

⚖️

Minimum Mass

No housing reduces system weight and shortens axial length compared to housed units.

Typical Applications

The SHG-2A suits OEM robot joint designs, custom machine tool rotary axes, semiconductor equipment, and precision positioning stages where the surrounding housing, motor support, and output structure are designed directly into the host machine.

Key Specifications

Critical performance parameters at a glance

📊
14, 17, 20, 25, 32, 40, 45, 50, 58, 65 mm
Available Frame Sizes
📊
50:1 to 160:1
Gear Ratio Range
📊
23 Nm to 6,175 Nm
Peak Torque Range
📊
3 parts: flexspline, wave generator, circular spline
Number of Components
📊
High torque version - same form factor but higher torque capacity
vs SHF-2A
📊
46Nm
Size 14 Ratio 50 Peak Torque
📊
70Nm
Size 14 Ratio 100 Peak Torque
📊
127Nm
Size 20 Ratio 50 Peak Torque

Technical Specifications

Overview

Available Frame Sizes
14, 17, 20, 25, 32, 40, 45, 50, 58, 65 mm
Gear Ratio Range
50:1 to 160:1
Peak Torque Range
23 Nm to 6,175 Nm
Number of Components
3 parts: flexspline, wave generator, circular spline
vs SHF-2A
High torque version - same form factor but higher torque capacity

Torque - Size 14

Size 14 Ratio 50 Peak Torque
46 Nm
Size 14 Ratio 100 Peak Torque
70 Nm

Torque - Size 20

Size 20 Ratio 50 Peak Torque
127 Nm
Size 20 Ratio 160 Peak Torque
191 Nm

Torque - Size 25

Size 25 Ratio 50 Peak Torque
242 Nm
Size 25 Ratio 160 Peak Torque
408 Nm

Torque - Size 32

Size 32 Ratio 50 Peak Torque
497 Nm
Size 32 Ratio 160 Peak Torque
892 Nm

Torque - Size 40

Size 40 Ratio 50 Peak Torque
892 Nm
Size 40 Ratio 160 Peak Torque
1530 Nm

Torque - Size 45

Size 45 Ratio 50 Peak Torque
1235 Nm
Size 45 Ratio 160 Peak Torque
2483 Nm

Torque - Size 50

Size 50 Ratio 80 Peak Torque
2418 Nm
Size 50 Ratio 160 Peak Torque
3185 Nm

Torque - Size 58

Size 58 Ratio 80 Peak Torque
3185 Nm
Size 58 Ratio 160 Peak Torque
4459 Nm

Torque - Size 65

Size 65 Ratio 80 Peak Torque
4836 Nm
Size 65 Ratio 160 Peak Torque
6175 Nm

Accuracy

Standard Accuracy
1 to 1.5 arc-min depending on size arc-min
Standard Accuracy Size 14 and 17
1.5 arc-min arc-min
Standard Accuracy Size 20 and above
1 arc-min arc-min

Product Attributes

Product Type
High Torque Silk Hat Component Gear Set
Series
SHG Series
Frame Sizes
14, 17, 20, 25, 32, 40, 45, 50, 58, 65 mm
Gear Ratios
50:1 to 160:1
Peak Torque Range
23 Nm to 6,175 Nm
vs SHF-2A
Higher torque version of SHF-2A
Component Count
3 parts coaxial
Through Hole
Yes, large central bore
Manufacturer
Harmonic Drive LLC

Industrial Applications

These component sets are suited for OEM designs where engineers want to integrate strain-wave gearing directly into their own housings and mechanical assemblies.

🧩

Embedded OEM Designs

Used when the reducer elements are integrated directly into custom mechanical structures rather than installed as a complete housed gearbox.

OEMEmbeddedCustom housing
🤖

Robot Joint Development

Supports custom robotic joints where engineers want direct control over packaging, bearing layout, and motor coupling strategy.

Robot jointsCustom designIntegration
📐

Space-Constrained Assemblies

Helps reduce mass and envelope size in systems where every millimetre matters and a full housed unit would be too large.

CompactLightweightSpace saving
🏗️

Machine Builder Platforms

Useful in proprietary automation modules where the gearbox architecture is part of the machine structure itself.

Machine buildersPlatform designOEM
🔧

Custom Servo Modules

Allows integration with selected motors, bearings, and feedback devices for application-specific performance targets.

Servo moduleCustom motor matchDesign freedom
🛠️

Prototype to Production

Supports development teams moving from proof-of-concept designs into repeatable production assemblies with a known reducer platform.

PrototypeProductionEngineering
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 SHG-2A delivers 30 percent higher torque than the SHF-2A using the S tooth profile while maintaining the same silk hat mounting geometry.

Have a technical question not answered above?

Our application engineers review every RFQ and respond with specification-matched recommendations.

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