Description of πͺ CMT 537 508 31 Forstner 2 Inch Diameter - Precision Drilling Tool for Woodworking Projects
3-35/64-Inch Overall Length, Right-Hand Rotation. 2 spurs, 2 precision ground cutting edges, long-lasting cutting performance. Drill precise flat bottom holes with no chipping in any thickness of soft wood. For drilling holes in any direction and making arched openings. For drilling partially overlapped flat bottom holes or niches used to fix supports.
Still holding after drilling 35 2" deep holes in treated wood. I use a 1/2" Milwaukee Magnum hole punch at 850 RPM. A slight wiggling motion helps a lot.
Exceeded my expectations! I wanted to poke a center hole in a rotted fence post and then poke the rest out with a long pry bar. But things didn't go as planned. I used two 12" extensions and modified the Forstner shaft to accommodate the set screws. I took my time and regularly switched the drill on and off, which was self-cleaning. I drilled about 18 inches with no problems. To my surprise, the 4x4 post was solid and the only rotten part was at ground level. Great drill bit, although the edges
Decent piece for the price. My problem is with a smooth round bar. Your working with the 2" drill causes a lot of friction/resistance and I could not tighten the chuck enough to keep the drill's shank from slipping (key type chuck). I have drilled a deep well. to 6x6, so I had to add an extension. The slippage was worse, the two set screws just didn't hold the round shank of the bit. Dremel tool and diamond cutting disc. Now the set screws are tight and the slip problem is solved. My adviceβ¦