Delta DJ-30 - Definitions O F Jointing a N D Planing O P E R Ations

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DEFINITIONS O F JOINTING A N D PLANING OPERATIONS
Fig. 2
Fig. 3
JOINTING OPERATIONS Jointing cut s or edge jointing is the simplest and most common operation which can be
done on the jointer and these cut s are made to square an edge of a workpiece. The fence is square with the t able and
the depth of cut is approximately 1/8 inch. The workpiece is positioned on the jointer with the narrow edge of the work -
piece on the infeed t able and the major flat surface of the workpiece against the fence, as shown in Fig. 2. The work-
piece is moved from the infeed t able, across the cutterhead to the out feed t able. CAUTION: Never pass your hands
directly over the cutterhead and use push blocks to feed the workpiece whenever possible . The hand over the
out feed t able presses the work down so that the newly-formed surface will make perfect cont act with the t able. The hand
over the infeed t able (usually the right hand) exert s no downward pressure, but simply advances the work to the
cutterhead. Both hands exert pressure to keep the work in cont act with the fence.
PLANING OPERATIONS Planing or surfacing is identical to the jointing operation except for the position of the work -
piece. For planing, the major flat surface of the workpiece is placed on the infeed t able of the jointer with the narrow
edge of the workpiece against the fence, as shown in Fig. 3. The workpiece is moved from the infeed t able, across the
cutterhead to the out feed t able est ablishing a flat surface on the workpiece. Always use push blocks when performing
planing operations and NEVER pass your hands directly over the cutterhead.