Jobber drills are the most common drill type. The length of the flutes is between 9 and 14 times the diameter of the drill, depending on the drill size. Therefore a drill that is 12.7 mm (1/2 inch) in diameter would be able to create a hole that is 114.3 mm (4 1/2 inches) deep, because the hole is 9 times the diameter’s length. A 3.2 mm (or 1/8 inch) diameter drill can make a hole that is 41.3 mm (or 1 5/8 inches) deep, because the hole is 13 times the diameter’s length. It is a straight-shank drill which is somewhat shorter than the taper-shank drill of the same diameter.
High-quality Jobber Drills Supplies
NEIS stocks both the imperial and metric sized drills. These high quality jobber drills are suitable for a variety of materials. Suttons Jobber Drills are top of the line. Have a look at the collection we have, and contact us if you require more information or are unable to find what you need.