pilot hole drilling<\/a><\/strong>.<\/p>\n\n\n\nBut the spotting drill bit has a 120-degree angle, and the center drill bit has a tapered 60-degree angle with 120 tip conical angle. When a center drill is used to drill a pilot hole, there are two different sizes of holes in the material.<\/p>\n\n\n\n
The regular drill bit has a 118-degree angle. When it uses on the pilot hole, which was drilled using a center drill bit there is a chance to deflect or slipper the drill bit a little bit due to less contact with the surface. Hence the accuracy can be reduced in a certain extent.<\/p>\n\n\n\n
But the spot drill bit has a 120-degree cutting angle, and it can fit a 118-degree angle drill bit perfectly. So spot drill bit is very good for pilot hole drilling with high accuracy for secondary drilling.<\/p>\n","protected":false},"excerpt":{"rendered":"
A spotting hole drill bit can be named a hole starting drill bit. Both are similar tools. It has a tight tolerance point geometry with a very short flute length. Spotting … <\/p>\n
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