When we spec linear stages for custom automation, the first question from the customer is almost always: “How heavy can it carry?”
But anyone who’s been in this trade for a few years knows that weight is only the beginning. The real killers are acceleration, overhung moments, mounting orientation, and duty cycle.

Last year, we retrofitted a CNC loader with a PSG stage. The customer insisted on a static payload of 80 kg. On paper it looked fine. But during acceleration the guide vibration shot up, and repeatability drifted from ±0.02 mm to ±0.08 mm. We had to swap to a larger screw diameter and re‑calculate the dynamic thrust before the machine would behave.

This article is my practical field guide to understanding what the PSG high‑torque linear stage can actually handle—and how to avoid the common traps.

If you've spent any time on the factory floor, you know this: a high-torque linear stage leaves the factory with a spec sheet full of promises, but how long it holds that accuracy depends entirely on how you treat it. In 2026, cycle times are faster, loads are heavier, and 24/7 operation is the norm. When a stage starts acting up, the root cause is rarely the design — it’s usually maintenance falling through the cracks. This guide skips the glossy brochure talk and gets straight to what you actually need to check, listen for, and do in the real world.