My velcro backed diamond disks keep flying off my mandrel...

We've seen this happen occasionally with these diamond disks. Over the years, we've continued to refine the attachment structure of the velcro-backed diamond disk. The mandrels now have a much better hook system than in previous generations, so you should see less and less detachment occurring.

One main reason the disk comes off the mandrel is fatigue and hook damage. The hook part of the velcro is the most important part of the equation. They hold onto the loops from the disk and prevent any disk movement. Eventually, hooks do wear down and lose their "gripping" power. This occurs mainly from normal usage of removing and applying disks over and over.

It's entropy, and there's not much to be done about it.

Some things also speed up this fatigue on the hook system, including heat. It's crucial to use the disks with adequate water so you don't weaken the hook system by building up too much heat and stunting the tips of the hooks on the mandrel. This will seriously weaken the attachment of the loops to the mandrel.

Some usage environments are tough on these systems, too, such as edge work or areas that constantly use only the edge of the disk, not the full surface. This puts undue stress on the attachment and can cause premature failure of the system. Once again, not much can be done in these situations. If that's how you need to utilize the disks, you'll have to get comfortable with more disk attachment failures or look into using our Dual Loc attachment systems.