Shank Hole And Pilot Hole. Porter cable 5507 9/64 pilot hole bit f/552 1/4 shank. Pilot hole and shank clearance hole boring recommendations for wood screws screwdiameter bit or drill sizes no of auger bit to counterbore for striking head for shank clearance holes for pilot holes hard woods soft woods twist bitnearest size in fractions of an inch drill gauge no or letter to. If you are creating a pilot hole for a nail, the right drill bit is slightly smaller than the nail's shank.
I have always drilled my pilot hole first and then drilled the shank hole in the top piece.
The top countries of suppliers are china, taiwan, china. Alternatively, you can begin by drilling the pilot hole through both pieces, then ream out just the clearance hole in the top piece only with the larger bit. Then, drill a pilot hole in the bottom piece to accept the screw's threads. The pilot hole is necessary when the threat of splitting the material is likely. Table of recommended pilot hole sizes for hardwood and softwood that will not split your work out like so many table floating around the internet. Quick change hole saw arbor, shank size 7/16 in., shank shape hex, fits hole saw dia. This helps to keep the wood from splitting, and makes it easier to insert the screw. Used for drilling pilot holes for hinges.
