Countersink bits

When repairing a car, it is often necessary to remove defects, that appear during drilling. Countersinks are used to perform this task. These are multi-blade tools, which are placed in the groove or hole, and then, rotating, make it smoother, or expand it if necessary.

Types

By shape and application range:

• Cylinder. They allow to increase the diameter and treat the elements of the corresponding shape.
• Conical. They are used for preparation of tapered holes for certain screws, edge beveling, treating of valve seats.
• Counterbore cutters. One part is inserted into the component, the other – remains outside. They give the needed shape to the perpendicular side of the drilled element.

According to a construction, the tools can be solid or dismountable. The first are usually cheaper, the second are easier to sharpen. There are the following tools according to an application method:

• Manual. They are driven due to force of a user. They can be sold in a kit with a tap wrench.
• Heads. They are components of metalworking and drilling lathes, boring and milling machines. They can be also used in combination with mechanical or electric drills.

The units differ from one another by sizes. Diameter usually varies in 2–80 mm range. Length of the most demanded parts is 30–90 mm. Moreover, you can order a kit of tools of various characteristics online.

Tips on countersinks use

1. Use the tool only according to its designation and in correspondence with dimensions of the treated holes.
2. During operation, cool down the steel parts using a special lubricant.
3. Take into account, that high accuracy of treating can be achieved only with the help of a machine.

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