---
publication_id: "OT-2026-000000710"
title: "Logarithmic hollow shaft speed reducer"
published_at: "2026-09-15T19:03:17.179137Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000000710"
categories:
  - "industrial-motion-power-transmission/rotary-motion"
keywords:
  - "f16h25/06"
  - "f01c1/084"
  - "f16h2025/063"
  - "f16h3/56"
---

# Logarithmic hollow shaft speed reducer

## Abstract

A logarithmic hollow shaft speed reducer comprising a compact, modular two-stage rotary system with independently selectable coupling paths. The first stage produces coaxial outputs directed to either the ring, sun, or carrier of a standalone second-stage differential planetary gear. This architecture enables multiple torque-speed modes—high-speed/low-torque, balanced, and high-torque/low-speed—without altering drive element configuration. The speed reducer's modularity and clarity support cost-effective manufacturing and flexible deployment.