The main difference between the 1.5kW and 2.2kW spindles is simply how much power they put out and how big a cutter they can comfortably handle. The 1.5kW version comes with an ER11 collet that holds tools up to 1/4″ (about 7mm). It’s perfect for most hobby work, woodworking, plastics, engraving, and anything that doesn’t need heavy cuts. The 2.2kW spindle steps up to an ER20 collet that accepts tools all the way to 1/2″ (13mm). It has bigger bearings and a thicker shaft, so it stays rigid, runs smoother on big cuts, and lasts longer when you’re pushing it hard, especially on aluminum or thick material.

Pick the 2.2kW if you want to run larger cutters for faster material removal or you regularly machine metals and thicker stock without the spindle slowing down or struggling. Choose the 1.5kW if most of your work uses 1/4″ tools or smaller and you mainly cut wood, plastics, or do lighter jobs; it gives you all the power you need at a lower price and still gets the job done with ease.