![]() Since 2009, Underwriter’s Laboratory (UL) has mandated that all table saw designs, whether cabinet or portable, include a riving knife.įor non-through cuts, those that simply make a slot in the wood, such as with the use of dado blades, a riving knife is not necessarily needed. ![]() It is an anti-kickback device, if you will, that keeps the kerf open, so it is not grabbed by those rear teeth and sent back at your face.įor this safety reason, of course, your table saw should have a riving knife. ![]() It keeps the kerf on the wood piece open and prevents the cut from closing around the rear teeth of the blade. ![]() This is what a riving knife does on your table saw. If we return to the image of that branch that closes on your tree saw as you cut through it, we know if we pull the branch on the outer side of the cut downward, it widens the kerf – the width of the cut – and makes cutting easier. It’s a safety device that is attached to the table saw’s arbor – the shaft that holds the blade – in a fixed position relative to the blade so that as the blade is raised and lowered, the riving knife moves in unison with it. Before answering, let’s make clear what a riving knife is.
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