Can I Perform Descaling with an 8mm Flex Shaft?

Descaling a pipe usually means grabbing the sturdiest shaft in your toolbox. But what do you do when tight bends prevent a 10mm or 12mm shaft from fitting? In this article, we’ll explore how to tackle the job with a thinner shaft, why it takes more time, and how to choose chains that make the work smoother.

Why Thicker Shafts Are Ideal

A larger diameter shaft—like a 10mm or 12mm—delivers greater torque to the cutting chains, so it blasts through scale and buildup faster and with less strain on your tools.

When Should You Choose a Thinner Shaft

If your drain is full of sharp turns, forcing a larger shaft through might be impossible. That’s when an 8mm shaft becomes your only option.

The downside? Lower torque means the descaling process runs slower. To make up for the reduced power, you’ll need chains with more aggressive cutters to slice through the scale effectively.

Summary

An 8mm shaft can handle descaling in pipes with lots of bends—just expect a slower pace and be sure to fit your shaft with more aggressive chains to get the job done.

We’ve also created a video on this topic, which you can find here.