Hand reamers

Hand reamer is a cutting tool designed for finish correction of holes after drilling, boring, countersinking. These devices allow to achieve maximum smoothness of the surface due to large number of cutting edges. All these tools consist of body and shank. The body includes the cutting and flute parts, and the shank is a gripping area for attaching the tool to the reamer holder.

Types of hand reamers

The products differ by the following criteria:

• Production material. Basically these are different types of tool and high-speed steels.
• Size. Most devices have a fixed diameter, but there are models in cataloguesdiameter ofwhich can be changed. Their adjustment range is rather small, in most cases it is percents of millimeter.
• Quantity of teeth. Often there are from 6 to 14 of them. The more blades are, the smoother surface they ensure.
• Shape of the worked hole. Tools are divided into cylindrical and conical ones. Some of them can be stepped: such a tool can be used for levelling holes of different diameters in a thin material.
• Teeth form. They can be straight or spiral with the appropriate channels for chip removal.
• Working stage. Manufacturers offer rough, medium-stage and finishing tools. The first ones are used for removing main mass of extra material, the second remove sharp edges, and the third provide maximum smoothness of the surface.

Tips on hand reamers use

1. Use tools strictly according to their purpose. Take into account that their teeth wear out during exploitation, in consequence of which the diameter gets smaller. In case if you need to make a hole of the precise size, you should use a new tool.
2. If you need to remove a metal layer of significant thickness, it is better to use several tools one by one, gradually increasing the diameter. It will protect the teeth of hand reamers from fast wear-out.
3. The tool should be cleaned from greasing material and used material after every using. It will prevent corrosion appearance and extend products service life.
4. It is desirable to store the accessories separately from other tools, better – in a closed box. It will protect them from moisture and dust.

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