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(mechanical engineering)
A machine for the shaping of long, flat, or flat contoured surfaces by reciprocating the workpiece under a stationary single-point tool or tools.
(mining engineering)
A fixed-blade device for continuous longwall mining of narrow seams of friable coal; the machine is operated along the coal face, planing a narrow cut from the solid coal as it travels.



a metalcutting machine tool whose cutting tool is used to plane flat horizontal, vertical, and inclined surfaces of rectilinear generatrices. There are two basic types of planers: standard planers and shapers.

The principal motion of planers is reciprocal in a straight line. In shapers, the cutter is attached to a head and is reciprocated; in standard planers, the workpiece is mounted on the table, and the table reciprocates. Cutting is effected during the planing stroke, which is followed by a faster, return stroke, during which the cutter or workpiece returns to its original position. The stroke speeds remain constant in all standard planers and in shapers with hydraulic drive; they vary from zero to maximum speed and back to zero in shapers with mechanical drive. The feed motion is in a direction transverse to the direction of the strokes and is accomplished at the end of each return stroke. In shapers, the feed motion is imparted to the table with the attached workpiece; in standard planers, it is imparted to the cutter attached to the head.

Small and medium-size workpieces are worked on shapers. Standard planers are used to plane relatively large workpieces, several medium-size workpieces simultaneously, and workpieces with long, narrow surfaces, primarily in single-item and small-lot production. The use of planers in large-lot and mass production is not feasible because of the nature of the return stroke. In such manufacturing, planers are replaced with milling, broaching, and grinding machines.




References in periodicals archive ?
Northtech offers double surface planers for finish surfacing or roughing operations.
We ran flatlines behind the boat with one Off Shore planer on each side, and the boards produced 70 percent of the fish.
The vertical boring mills, planers and horizontal mills were joined by an 18-ft-diameter vertical boring mill, a 6 x 6 x 22-ft CNC planer, a 20 x 30 x 9-ft 50-ton heat treatment furnace, and fabrication and welding facilities.
Planer Size: The size of planers is often referred to as a 30" planer or a 60" planer.
Powermatic started in 1921 in Tennessee with a design for an improved wood planer.
If I had to use one word to describe a surface planer, I would say it is a "destroyer," since it destroys surfaces.
If realized, investments in new production facilities and competence center for planers will be made in Karlskrona, Sweden.
The best bet for king mackerel will be pulling planer boards with duster rigs and dead cigar minnows between snapper spots.
Lot 2 planers rental and / or sweepers with drivers 60 000 EUR minimum annual tax Annual Maximum 300 000 EUR incl.
The Worksite Pro line for skid steers and compact track loaders include two "dozer" blades, five vibratory rollers, four cold planers, two tillers, and two hydraulic breakers (also works with compact excavators).
Planers used to be found only at cabinet and millwork shops.