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Boring machine - from a milling machine. home workshop

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The functions of a boring machine can also be successfully performed by a milling machine. Of course, according to a lower accuracy class, but for many works this is not so significant. For such a transformation, we recommend that you use the universal boring head developed at the Valuyskaya station by young technicians: it impresses with its manufacturability and simplicity.

The device consists of the following elements: a conical shank, a hub and a quill. The hub is mounted on the shank with four screws, two of which clamp the quill in parallel. The cutter is fixed in a slider moving along two cylindrical guides located inside the quill. Moving the slider - with the help of a lead screw.

Boring machine - from milling
Boring head for a milling machine (click to enlarge): 1-shank with Morse taper (steel 45), 2 - M6 screw, 3 - hub (steel 45), 4 - lead screw (steel 45), 5 - bushing (BrOTsS- 4-4-17), 6 - lock nut (steel 20), 7 - slider (steel 45), 8 - M6 screw, 9 - guide (steel 45), 10 - plug (BrOTsS-4-4-17), 11 - pin (steel 45), 12 - washer, 13 - screw M6, 14 - boss (steel 45), 15 - handle (steel 20)

Works boring head as follows. The tail part is inserted into the spindle of the milling machine and fixed with a regular tightening screw. The workpiece is fixed in a vice or on the machine table. When boring holes with a diameter of up to 40 mm, the position of the cutter relative to the center of the hole is only adjusted. due to the extension of the slider. Boring of holes with a diameter of up to 85 mm is carried out in two stages. First - as described above, then the slider should be moved to its original position, loosen the clamping screws and move the quill until it stops in the hub.

Hole diameter control - according to the scale printed on the end surface of the sleeve (pos. 5). The fixture kit also includes a handle for the lead screw and clamping screws.

Author: Yu.Kutepov

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