Yes, it's necessary. The strongest magnetic part of the magnetic disc coupler is primarily located in the red area shown in the figure below. Before implementing any shielding measures, it's crucial to test the surface magnetism to make an informed decision.
We typically provide customers with a Magnetic Field Viewing Film. This tool helps identify the location of the magnetic part. The stronger the surface magnetism, the clearer the magnetic poles will appear on the film.
Magnetic couplings
$39.95 – $399.95