Jointer

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jointer

[′jȯint·ər]
(engineering)
Any tool used to prepare, make, or simulate joints, such as a plane for smoothing wood surfaces prior to joining them, or a hand tool for inscribing grooves in fresh cement.
A file for making sawteeth the same height.
An attachment to a plow that covers discarded material.
A worker who makes joints, particularly a construction worker who cuts stone to proper fit.
A pipe of random length made from two joined, relatively short lengths.

Jointer

 

(also, jointer planer), a woodworking machine for straight planing (milling and jointing) of workpieces along faces or edges. Jointers have a frame on which are mounted a circular knife shaft (usually with from two to four blades), a table, a vertical cutterhead, a guide (fence), and a removable or fixed feed mechanism; the last component is absent when manual feed is used. Usually, one large face and one edge are worked simultaneously. The workpiece is oriented along the fence when the vertical cutter head is removed. When a large face and an edge are worked simultaneously, the knife shaft and the vertical milling head are both used, with the latter set at an angle of 90° to the table’s surface. The table consists of a long front section, set at a height corresponding to the thickness of the layer being planed off, and a fixed rear section, whose surface is level with the height of the periphery of the cutting edges of the blades.

Jointers may be combined with thickness planers in a single machine designed for the two-sided planing of beam-shaped parts and sheets. Such combination machines have a box-shaped frame with a feeding device, four base tables, two jointing heads, and two planing heads mounted on the upper part; a blower and a drive for the feed mechanism are located inside the frame. Work-pieces are held in a magazine having transverse supports situated between two feed chains. The machines can process up to 30 workpieces simultaneously.

REFERENCE

Derevoobrabatyvaiushchee oborudovanie: Katalog-spravochnik. Moscow, 1972.

N. K. IAKUNIN

jointer

1. A metal tool used to cut a joint partly through fresh concrete.
2. In masonry, a tool for filling the cracks between courses of bricks or stones.
3. In masonry, a bent strip of iron inserted into a wall to strengthen a joint.
4. In carpentry, a long plane, esp. used to square the edges of boards or veneer so that they will make a close joint with other pieces.