_:n9b5f3589569b468d99bca1a329c35daexb33
<http://schema.org/description>
"For reference, I purchased the 45460-3US. This is a 3-flute flush trim bearing with an upper bearing and up-shear. If you&#x27;re not familiar with this terminology, it basically means the bearing is closer to the shank of the bit and the cutting edges of the tool cut at an angle towards the bearing/shank. I use this mostly for trimming plastic sheets but have also used to cut fixtures that have been cast from a 2-part aluminum infused resin. I&#x27;m sure it works awesome on wood as well. I&#x27;m doing this on a router table so the router is inverted and &quot;up&quot; is actually &quot;down&quot; in reference to the position of the bits and their bearing. The reason I wanted the up-shear angle was because some materials will tend to &quot;load&quot; up when cutting/trimming with a straight cut bit. The angled up-shear cuts across the thickness of the workpiece rather than the entire length of an edge. This reduces heat buildup and produces nice clean edges. This is extremely important when cutting plastics as some of them may tend to melt or become soft when. Also, plastics may tend to show tool chatter a bit more so this bit helps to mitigate that as well."
<https://www.toolstoday.com/v-7508-971.html>