13pcs 3/4 Inch Weldon Shank 1" Cutting Depth and Cutting Diameter for Magnetic Drill Press HSS Standard Kit Two Flat with 2 Pilot Pins

Description

High-speed steel (HSS) HSS core drills are made from high-speed steel material. These are most popular core drills or annular cutters in market. HSS core drills have longer service life, high heat resistance: the characteristics of HSS core drills is that drilling with these core drills can be done without the use of excessive force. Time saving As an annular cutter cuts only on the periphery of the hole to be made, it has to remove much less material as compared to conventional drill bits which cut and remove the complete material of the hole. Annular cutters are considered to be 3 to 4 times faster than conventional drill bits. Also while using a twist drill bit or metal hole saw one has to do pre-drilling and step-drilling operations for bigger diameter holes, whereas an annular cutter requires no pre-drilling and step-drilling. It is a one-shot drilling operation. Energy savings Because annular cutters do not have to drill/cut through the complete work piece, they require less thrust and thus less energy to drill through material More finishing The hole made using an annular cutter is more finished, precise and accurate. Easy Due to the unique geometry of the annular cutters, making holes at awkward angles is also very easy. Efficient cooling The cooling of annular cutters is internal. The internal lubrication is provided through a hole with the help of a pilot pin. Internal lubrication makes the annular cutter faster and more efficient for deep hole drilling. Annular cutter sizes Shank dimameter:3/4" 6 annular cutters: 7/16"x 1'', 1/2"x1'' 9/16" x 1'', 11/16" x 1'' 5/8" x 1'', 3/4"x 1'' 13/16" x 1'', 7/8"x1' 15/16"x 1'', 1" x 1'' 1-1/16" x 1'' 2 center pins: 4.74x77mm 6.34x77mm