# Precision Harmonic Drive Reducers Engineering Brief

Revision: Public family brief rev 2026-07-26
Family code: RGB-HMR
Product page: /products/harmonic-drive-reducers
Owner: Robotized Gearbox engineering resource desk
Source register: Product-family profile register
Last reviewed: 2026-07-26

## Public File Status

Product-family brief and RFQ worksheet are public.

This public brief supports early RFQ screening and buyer-side engineering review. It is not a final model-specific datasheet, certified 2D drawing, STEP, IGES, or SolidWorks release.

## Best-Fit Use

Compact robot joints, collaborative robot axes, and precision rotary motion.

## Subseries and Public Specification Matrix

### Ultra-flat strain-wave reducer

Scope: Short axial-length harmonic-style reducers for compact robot joints, medical automation, and slim rotary axes.

Public specs to check:
- ratio 30:1-160:1
- zero-backlash target
- thin axial envelope

Buyer use: Use this family when the mechanical package is extremely shallow and output precision still matters.

### High torque density strain-wave reducer

Scope: High-ratio strain-wave reducers with alloy flexspline options and high repeated torque density.

Public specs to check:
- ratio 50:1-320:1
- compact torque density
- alloy flexspline review

Buyer use: Use this family when payload and ratio requirements exceed a standard compact harmonic reducer.

### Standard cup or hat reducer

Scope: General robot joint harmonic-style reducers with cup or hat configuration and motor-side wave generator options.

Public specs to check:
- ratio 30:1-160:1
- input wave generator match
- output support options

Buyer use: Use this family for robot arms, collaborative automation, and compact rotary stages with known interface drawings.

## Minimum Inputs Before Matched Files

- Joint torque and ratio
- Backlash or lost-motion target
- Wave generator or motor interface
- Output bearing arrangement

## CAD and Datasheet Release Gate

Released after joint stiffness and interface review.

Engineering verifies compact joint envelope, stiffness target, motor interface, and output support before CAD release.

## Matched Package After Review

- Reducer envelope
- Motor-side interface drawing
- Output-side interface drawing
- Validation notes

## Public Downloads to Pair With This Brief

- public family brief
- RFQ template
- asset index
- inspection request

## Recommended Worksheet Links

- Gearbox RFQ Template: /resources/gearbox-rfq-template.csv
- Engineering Asset Index: /resources/gearbox-engineering-asset-index.csv
- CAD Package Manifest: /resources/gearbox-cad-package-manifest.csv
- Replacement Review Checklist: /resources/replacement-review-checklist.csv
- Inspection Document Request: /resources/inspection-document-request.csv

## Buyer Review Notes

- Use this brief to decide whether the product family is plausible before sending confidential drawings.
- Attach torque, ratio, backlash, duty cycle, mounting, quantity, destination, and incumbent evidence when available.
- Ask engineering to confirm the configured model, interface, revision, and inspection-document scope before using any matched CAD file in a machine layout.