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What is an edge finder?

Shop for Centre and Edge Finding Sets

Edge finders are steel tools used to locate the edges of a workpiece. They are held in a collet, end mill holder or chuck mounted in the spindle of a milling machine or drill press. Edge finders are steel tools used to locate the edges of a workpiece.

They are held in a collet, end mill holder or chuck mounted in the spindle of a milling machine or drill press.

Edge finders consist of two or three (if your tool is a combination edge and centre finder) precise cylindrical parts held together by a tensioned spring. Edge finders consist of two or three (if your tool is a combination edge and centre finder) precise cylindrical parts held together by a tensioned spring.
They can also be used to accurately indicate the location of a workpiece relative to the spindle of the machine they are used with. Features such as holes or grooves cannot be made on a part until the workpiece is positioned correctly underneath the spindle. They can also be used to accurately indicate the location of a workpiece relative to the spindle of the machine they are used with.

Features such as holes or grooves cannot be made on a part until the workpiece is positioned correctly underneath the spindle.

Edge finders are also effective at finding the centre of a hole. Edge finders are also effective at finding the centre of a hole.

Edge finder sizes

Edge finders come in a number of different sizes. They vary in terms of both the diameter of the shank and the diameter of the probe (contact diameter). The size of the edge finder required will depend upon the inside diameter of the collet used in the milling machine or drill press you are working with. Edge finders come in a number of different sizes.

They vary in terms of both the diameter of the shank and the diameter of the probe (contact diameter).

The size of the edge finder required will depend upon the inside diameter of the collet used in the milling machine or drill press you are working with.

Combination edge and centre finders

Some edge finders incorporate a centre finder that can be used to locate centre punch marks or holes in a part. Some edge finders incorporate a centre finder that can be used to locate centre punch marks or holes in a part.

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