On 2009-03-31 Pileated Contractor, Portland, OR wrote: I´m a remodeling contractor. This is the best bit I´ve found for boring through studs or joists when doing plumbing rough-in work. The bit basically pulls itself through the wood and chews up everything on the way through.
I use my DeWalt DW120K right angle drill but you could use a hole hawg etc. Use a heavy duty 1/2´ drill, preferably one that you can hold with 2 hands because if this gets stuck on a nail etc. while drilling the torque of the drill can really painfully wrench your arm.
One great thing is that can send the bits out for resharpening although will they last a long time before you have to. Get a 2 9/16ths bit for running your 2´ pipe and a 12´ hex bit extender because the shank is only about 3´ long.. And summed up by saying Great bit for running 1 1/2 ABS drains and vents. Currently Milwaukee 48-25-2121 2-1/8-Inch Bit with 7/16-Inch Shank Selfeed Bit has an overall rating of 10 over 10.
Milwaukee 48-25-2121 2-1/8-Inch Bit with 7/16-Inch Shank Selfeed Bit can also be found in the following searches:
Milwaukee claimed Many Electricians and Plumbers rely on Milwaukee´s Selfeed Bits for large hole drilling in wood. The inside cutting plane shaves the hole radius for clean smooth holes without pressure. A removable, replaceable feed screw draws the bit into the gummiest of woods effortlessly. A hex shank provides a secure gripping surface for the drill chuck. The bit is coated with a rust inhibitor. Available in 1 inch, 1-1/8 inch, 1-1/4 inch, 1-3/8 inch, 1-1/2 inch, 1-3/4 inch, 2 inch, 2-1/8 inch, 2-1/4 inch, 2-9/16 inch, 3 inch, 3-5/8 inch and 4-5/8 inch diameters. Use Feed Screw 48-28-6870, Socket Wrench 49-96-0060 and Set Screw 06-83-2625 on diameters less than 3inches. One per package.FEATURES: 2-1/8 in. bit diameter. 7/16 in. hex shank. Removable and replaceable feed screw. Cutting edges can be resharpened
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