What is the difference between the shape and use of the construction drill, woodworking drill, high-speed steel drill

Published:

2019-11-27

Construction workers' drill is a general name for electric hammer drill and cement drill. Used for the opening of concrete, wall and other workpieces. The outer shape is a straight shank, and the head is welded with an alloy blade. No opening in the blade. Only slots.

There are two types of woodworking drills. One is a woodwork twist drill. The other is a woodworking flat drill. Woodworking twist drills are generally called woodworking drills. The head has three spikes and the middle is long and needle-shaped. Slightly shorter on both sides with cutouts. The blade has an opening. The carpentry flat drill head is flat. With a small hole in the middle. The top is needle-shaped. There is no blade, (in fact, the blade is at the ends of the flat head, and the opening is in a contrast shape.) There are two types of handles, ordinary and hexagonal.

High-speed steel drills are divided into straight shank twist drills and cone shank drills. Waiting for shank drill. There is not much difference between books. Is that the handle is different