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High Speed Steel Countersinks are excellent for cutting wood, plastics and metal. They are available with included angle of 60, 82, 90, 100 or 120 degrees. 82 degrees is the Standard size unless otherwise requested.
The four-blade construction have shorter, more rugged blades to reduce breakage and are designed to Countersink in metals and hardwoods. They are adjustable up and down on twist drills and are held in place by two hex-socket set screws which tighten into the flute of the drill.
|Part Number||Cutting Diameter||Drill Hole Size||Overall Length|
September 25, 2020
I needed to predrill 100 holes for installing #6×¾" silicon bronze wood screws. The design required a flush mount, not too deep or too shallow. This super sharp countersink, along with the matching depth stop collar, provided the required predrill. It was a bit tricky to lock the stop collar as it kept shifting when tightening the set screws. The flutes in the countersink are at an angle to the cutting edge. I finally removed the set screw and looked through the machined hole to align it to the countersink. That worked a treat! I am very happy with the bit. W.L.Fuller makes a quality product!
October 3, 2008
Clogs like crazy with the stop ring in Ipe. Had to remove stop to use. Size is for free part of screw not beyond...for that you'll need a smaller bit.