Modern Machine-Shop Practice Part 279

=Face-cam.= A cam in which the actuating surface is on its side or sides.

=Face-cutter.= A milling cutter having its teeth upon its circ.u.mferential surface.

=Face-plate.= A plate or table having a plain or flat surface for holding work.

=Facing-cutter.= A cutter for levelling a face or surface.

=Farrar planer.= A wood-planing machine in which a travelling bed is used to feed the work to the cutter head.

=Feather.= A key that is fast in one piece of the work, and an easy fit to the other, so that the latter may be moved along the feather.

=Feed-motor.= That part of a machine that feeds either the work or the tool, so as to put on the cut.

=Feed-rolls.= Rolls that move the work to machines or to cutting tools.

=Feed-screw.= A screw that is used to feed the cutting tool in a machine.

=Fence.= A plate in a wood-working machine, against which the work is set or moved to hold it in proper position for the cutting operations.

=Fiddle-drill.= A drill that is revolved back and forth by a device similar to a fiddle-bow.

=Fifth wheel.= The circular slideway that enables the front axle of a vehicle to turn horizontally.

=File.= A hand tool for cutting metal, wood, ivory, bone and all other hard substances except stone.

=File-card.= A wire-brush for cleaning files.

=Fillet.= A curved piece for filling in a corner.

=Fillister-head.= A screw-head that is cylindrical and contains a screw slot.

=Firmer-chisel.= A stout carpenter's chisel that is used for cutting out mortises and similar heavy work.

=Fit-strip.= A projection usually about an inch wide that is intended to be fitted to bed the piece properly and save bedding the whole surface of the piece.

=Fixture.= A device for holding work in an exact position, true with some one face, hole, or pin, as the case may be.

=Flat-chisel.= A wedge-shaped machinist's chisel.

=Flat-drill.= A drill whose body is rectangular in cross-section.

=Flatter.= A swage for flat surfaces.

=Fleam.= Acuteness given to saw teeth by filing their front faces at an acute angle to the plane of the saw blade.

=Flexible shaft.= A shaft composed of wire, similar to a wire rope, for transmitting rotary motion, notwithstanding that the shaft may be an arc of a circle.

=Flooring-machine.= A machine for planing and matching at the same time, and generally used for floor boards.

=Flute.= A groove.

=Fly-cutter.= A cutting tool fastened in an arbor or spindle, and used for producing irregular shapes.

=Follower.= A gear wheel that receives motion from another gear wheel.

=Follower-rest.= A rest that steadies work on the lathe and travels with the slide rest.

=Foot-block.= A work-holding device containing a dead centre, used upon a milling machine.

=Foot-lathe.= A lathe operated by foot-power.

=Fore-plane= _or_ =jack-plane.= A roughing out plane.

=Forging.= A piece or part that has been forged into shape.

=Fork-centre.= A centre used to drive woodwork in the lathe.

=Fork-scriber.= A double pointed tool used by boiler-makers to mark small circles.

=Former.= 1. A piece that acts as a guide to control the movement of a cutting tool. 2. A template or block on which a piece is bent or shaped.

=Fox-lathe.= A bra.s.s finisher's lathe, having a turret head and spiral thread-cutting devices that obviate the use of a lead screw or change gears.

=Friction-clutch.= A clutch that operates by frictional contact.

=Friction-gearing.= Wheels that transmit motion by the frictional contact of their circ.u.mferences.

=Friction-rollers.= Rollers employed to reduce the friction of the parts.

=Friction-wheel.= A wheel that drives by the frictional contact of its surface.

=Friezing-machine= _or_ =edge-moulding-machine.= A machine for cutting mouldings on the edge of wood work.

=Front-tool.= A tool having its cutting edge in front, and used for plain surfacing work.

=Fuller.= A blacksmith's tool for spreading the metal in any particular direction.

G

=Gang-drill.= A drilling machine on which a number of drills may be used simultaneously.

=Gang-edger= _or_ =gang-edging machine.= A machine in which a gang of saws are employed to trim the edges of boards or cut them to width.

=Gang-mills.= Milling machine cutters that are placed in gangs and side by side on the same arbor.

=Gap-lathe= _or_ =break-lathe.= A lathe having a gap in its bed to enable the chucking of work that would not otherwise pa.s.s over the bed.

=Gauge.= 1. A standard of measurement. 2. A standard of shape.