New Large, Hollow-Shaft Gear Unit from Harmonic Drive LLC

Harmonic FSB 2UH

October 9, 2020

The new FBS-2UH gear unit series from Harmonic Drive® features a large, hollow shaft with a compact outer diameter.  The extra large hollow shaft is ideal for robots and machines requiring complex cabling to pass through the axis of rotation.  

The new gear unit design features Harmonic Drive’s “S” tooth profile for optimal tooth engagement resulting in high torque, high-torsional stiffness, long life and smooth rotation.

The FBS-2UH Series is available in two sizes (25, 32) and three ratios (30:1, 50:1, and 100:1).

Key features include:

  • Extra large hollow-shaft diameter is our largest yet for a standard product
  • Compact dimensions for use in robotics
  • Outer diameter and hollow bore optimized for design flexibility and performance
  • Zero Backlash
  • Accuracy <1 arc-min
  • High torsional stiffness
  • High efficiency
  • Smooth operation
  • Robust cross roller output bearing

Information on the FBS-2UH hollow-shaft gear unit can be viewed here. 

Related Articles

Editor’s Pick: Featured Article

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s scalable engineering software, u-control 2000, adapts individually to your requirements. And, the u-control is powerful, compact and fully compatible with Weidmüller’s I/O system u-remote. This article looks at what makes u-control the heart of your automation.

Programmable logic controllers (PLCs) are one of the main components of any automated system. A typical control system has inputs, outputs, controllers (i.e., PLCs), and some type of human interaction with the system, a human machine interface (HMI), for example.

Read More

Latest Articles

  • The Power of OMRON’s Sysmac Studio: Unify Automation and Integrate Safety

    November 7, 2025 By Omron Automation Industry moves fast. Outpace obsolescence with OMRON’s Sysmac Studio. Designed to empower operations from the edge to the cloud, it unifies automation by prioritizing safety and security. Built for today, ready for the future. Today, the factory floor faces pressure from suppliers, consumers, competition, and emerging technologies. Operation teams… Read More…

  • NVIDIA 800 VDC Architecture Will Power the Next Generation of AI Factories

    November 4, 2025 By Mathias Blake, Martin Hsu, Ivan Goldwasser, Harry Petty and Jared Huntington The exponential growth of AI workloads is increasing data centre power demands. Traditional 54 V in-rack power distribution, designed for kilowatt (KW)-scale racks, isn’t designed to support the megawatt (MW)-scale racks coming soon to modern AI factories.  NVIDIA is leading the transition to 800 VDC data… Read More…