How much does the spindle on the Z axis raise?

The machine is advertised to be able to cut through 44mm of material.

I wanted to get an idea of how high the spindle travelled the z axis from the spoil board when it is raised.

I presume its meant that about 44mm +1/2mm of exposed end mill would be the limit of exposed end mill and material thickness combo?

With different length end mills, it would be good to know what kind of clearance you would get from using an end mill exposed at 20/30/40/50mm.

If I use a longer endmill, can I cut thicker material.all the way through, will the spindle raise high enough to clear the work?

If the Z axis were taller, I could get a cutting depth of the longest 1/4" end mills I can find, but raising the spindle high enough to clear the work is a bit unclear.

Hope I'm not being obtuse.

Thankyou :)