# Cycloidal Gearbox Replacement Engineering Brief

Revision: Public family brief rev 2026-07-26
Family code: RGB-CY
Product page: /products/cycloidal-gearbox-replacement
Owner: Robotized Gearbox engineering resource desk
Source register: Product-family profile register
Last reviewed: 2026-07-26

## Public File Status

Replacement review checklist is 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

Drop-in replacement, retrofit sourcing, and obsolete reducer review.

## Subseries and Public Specification Matrix

### Inline cycloidal replacement

Scope: Solid-shaft cycloidal reducer replacement where bolt circle, shaft height, and torque class drive selection.

Public specs to check:
- shaft diameter and keyway
- mounting bolt circle
- shock-load capacity

Buyer use: Use this path when replacing an existing cycloidal reducer without changing the machine frame.

### Hollow-shaft cycloidal replacement

Scope: Hollow-output cycloidal replacements for rotary tables, robot cells, and packaging machinery.

Public specs to check:
- hollow bore diameter
- output bearing format
- backlash and rigidity target

Buyer use: Use this path when cable-through or shaft-through packaging is the binding retrofit constraint.

### Compact servo cycloidal replacement

Scope: Servo-mounted cycloidal packages for high-torque automation where impact loads exceed standard planetary limits.

Public specs to check:
- servo adapter dimensions
- rated and peak torque
- thermal duty-cycle review

Buyer use: Use this path when a planetary reducer replacement needs better shock tolerance and stiffness.

## Minimum Inputs Before Matched Files

- Incumbent model and nameplate
- Bolt circle and pilot dimensions
- Shaft or hollow bore dimensions
- Rotation and lubrication requirement

## CAD and Datasheet Release Gate

Released after incumbent model cross-check.

Engineering compares the incumbent reducer, interface photos, and nameplate data before proposing a replacement file set.

## Matched Package After Review

- Interchange risk notes
- Replacement envelope
- Interface comparison list
- Incoming QC checklist

## Public Downloads to Pair With This Brief

- public family brief
- replacement review checklist
- 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.