A tonearm to die for

March 22, 2007
The recently updated ET 2.5 tonearm from Eminent Technology Inc., Tallahassee, Fla. (eminent-tech.com), uses high-tech carbon fiber, aluminum, and Teflon in its constrained-layer, highly stiff construction.

Counterweights, on the other hand, are lead.

The entire tonearm rides on a low-friction air bearing. A high-pressure (20-psi), low-flow pump sends air to a cylindrical manifold in the arm's bearing tube. Air, escaping through holes in the manifold, creates a cushion that totally supports the bearing tube. With air constantly escaping, pressure in the bearing is only about 7.5 psi. But bearing rigidity increases with the square of the air pressure, so the bearing is said to be quite rigid. The tonearm tracks linearly cross the record, keeping the cartridge or needle tangent to the record groove.

Sponsored Recommendations

Diaphragm Pump Technology Drives Industrial Washers

Jan. 23, 2025
Discover high-performance pumps and systems built to handle various gases, liquids, and chemicals with precision.

Harmonic Drive Actuators with Integrated Drive Technology

Jan. 17, 2025
Discover the future of motion control.In this video, we explore how integrated drive technology (IDT) from Harmonic Drive is revolutionizing the precision mo...

7 factors to Consider When Choosing the Right Gear Technology

Jan. 17, 2025
Choosing a drive involves several design factors that depend greatly on the task at hand. This top 7 list will guide you, whether your task requires precise and exact movements...

What are the Benefits of Actuators with Integrated Servo Drives?

Jan. 17, 2025
Actuators with Integrated Servo Drive Technology (IDT) simplify cable management, control hardware, and commissioning while achieving outstanding performance in a compact size...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!