TOOLS 1 Flashcards
In aircraft work, the unit of measure most commonly used is the
inch
is a tool that has several uses
combination set
used to scribe circles and arcs and for transferring measurements from the rule to the work
Dividers and pencil compasses
used for measuring diameters and distances or for comparing distances and sizes
Calipers
The three common types of calipers are
inside, outside, and hermaphrodite calipers
The smallest measurement which can be made with the use of the steel rule is
- one sixty-fourth of an inch in common fractions
- one one-hundredth of an inch in decimal fractions
a micrometer is used
in thousandths and ten-thousandths of an inch
The fixed parts of a micrometer are
the frame, barrel, and anvil
The movable parts of a micrometer are
thimble and spindle
Reading A Micrometer
The lines on the barrel marked 1, 2, 3, 4, and so forth
- indicate measurements of tenths
- or 0.100 inch, 0.200 inch, 0.300 inch, 0.400 inch
Reading A Micrometer
Each of the sections between the tenths divisions (between 1, 2, 3, 4, and so forth)
- divided into four parts of 0.025 inch each.
- One complete revolution of the thimble (from zero on the thimble around to the same zero) moves it one of these divisions (0.025 inch) along the barrel
The bevel edge of the thimble is divided into 25 equal parts. Each of these parts represents
one twenty-fifth of the distance the thimble travels along the barrel in moving from one of the 0.025 inch divisions to another.
Some micrometers are equipped with a _______ that makes it possible to directly read the
fraction of a division that is indicated on the thimble scale.
vernier scale
A variation of the micrometer is the ______ , which measures variations in a surface by
using an accurately machined probe mechanically linked to a circular hand whose movement
indicates thousandths of an inch, or is displayed on a liquid crystal display (LCD) screen
dial indicator
DIAL INDICATOR
The total amount of the fluctuation is
the runout
DIAL INDICATOR
A typical example would be using a dial indicator to measure the amount of ________ in a shaft
runout, or bend,
Dial Indicator
The outer portion of the dial is then rotated until the needle is pointed at
zero
Often used to measure the length of an object, the _______ provides greater accuracy than the ruler.
slide caliper
When using the common screwdriver, select the _________ whose blade will make a good fit in the screw that is to be turned.
largest screwdriver
A common screwdriver must fill at least ________ of the screw slot. If the screwdriver is the wrong size, it cuts and burrs the screw slot, making it worthless
75 percent
The two types of recessed head screws in common use are
the Phillips and the Reed & Prince
Replaceable tip screwdrivers, sometimes referred to as _________ , allow for the quick changing of a screwdriver tip, and economical replacement of the tip when it becomes worn
“10 in 1” screwdrivers
They are used to hold objects and make adjustments in tight places.
Needlenose pliers
They are used exclusively for twisting safety wire
Duckbill pliers
The C-clamp is shaped like a large C and has three main parts:
threaded screw, jaw, and swivel head
has flat jaws and usually a swivel base
machinist’s vise
has scored, removable jaws and an anvil-faced back jaw
utility bench vise
_________ are used to place reference marks on metal. This punch is often used to transfer dimensions from a paper pattern directly on the metal
Prick punches
The ________, which is often called a tapered punch, is used for driving out damaged rivets, pins, and bolts that sometimes bind in holes. The _____ is therefore made with a flat face instead of a point
drive punch
________, oftencalled drift punches, are similar to drive punches and are used for the same purposes.
The difference between the two is that the sides of a drive punch taper all the way to the face while the ______ has a straight shank
pin punch
The ________ is usually about 4 inches long. It has a point that tapers, and then turns straight for a short distance in order to fit a drill locating hole in a template
transfer punch
The _________ setting torque wrench is preset to the desired value. When this torque is reached, the operator notices a sharp impulse or breakaway “click
micrometer
should never be used to cut heavy sheet metal
Snips
yellow aviation snips
cut straight
green aviation snips
curve right
red aviation snips
curve left
When installing a blade in a hacksaw frame, mount the blade
with the teeth pointing forward, away from the handle
A blade with _________ is preferred when cutting machine steel, cold rolled steel, or structural steel.
14 teeth per inch
A blade with _________ is preferred for solid stock aluminum, bearing metal, tool steel, and cast iron.
18 teeth per inch
Use a blade with _________ when cutting thick-walled tubing, pipe, brass, copper, channel, and angle iron.
24 teeth per inch
Use the ____________ blade for cutting thin-walled tubing and sheet metal
32 teeth per inch
chisels are seldom _________ long
under 5 inches or over 8 inches
When cutting square corners or slots, a special cold chisel called a ______ should be used.
cape chisel
Rounded or semicircular grooves and corners that have fillets should be cut with a ________. This chisel is also used to re-center a drill that has moved away from its intended center
round nose chisel
The portion of the file on which the teeth are cut is called the ______.
face
The tapered end that fits into the handle is called the ____________.
tang
The part of the file where the tang begins is the _______
heel
The length of a file is the distance from
the point or tip to the heel and does not include the tang.
Files that have one row of teeth crossing another row in a crisscross pattern are called
double-cut files
Measuring from the tip to the heel of the file. The tang is never included in the length.
Length
Refers to the physical configuration of the file (circular, rectangular, or triangular or a variation thereof)
Shape
Refers to both the character of the teeth or the coarseness — rough, coarse, and bastard for use on heavier classes of work and second cut, smooth and dead smooth for finishing work
Cut
These are parallel in width and tapered in thickness. They have one safe edge (smooth edge) which permits filing in corners, and on other work where a safe edge is required. _____ are double cut and used principally for finishing flat surfaces and similar work.
Hand files
These files are slightly tapered toward the point in both width and thickness. They cut on both edges as well as on the sides. They are the most common files in use. _____ are double cut on both sides and single cut on both edges.
Flat files
These are usually tapered slightly in thickness and in width for about one-third of their length. The teeth are ordinarily single cut. These files are used for draw filing and to some extent for filing soft metals.
Mill files
These files may be tapered or blunt and are double cut. They are used principally for filing slots and key seats, and for surface filing.
Square files
These are circular in cross section and may be either tapered or blunt and single or double cut. They are used principally for filing circular openings or concave surfaces.
Round or rattail files
_____ are single cut and are used for filing the gullet between saw teeth.
Triangular
_______ , which are double cut, may be used for filing internal angles, clearing out corners, and filing taps and cutters.
three square files
These files cut on both the flat and round sides. They may be single or double cut. Their shape permits them to be used where other files would be unsatisfactory.
Half-round files
These are especially designed for use on soft metals. They are single cut and are made in various lengths.
Lead float files
Rectangular in section and tapers to narrow point in width. This file is used for narrow space filing where other files cannot be used.
Warding file
This file is used by tool and die makers on work having acute angles.
Knife file
Same section as flat and half-round files. This file has coarser teeth and is especially adaptable for use on wood.
Wood file
The _______ cuts with a toothed, steel disk that rotates at high speed. Handheld or table mounted and powered by compressed air, this power saw cuts metal or wood. To prevent the saw from grabbing the metal, keep a firm grip on the saw handle at all times
CIRCULAR-CUTTING SAWS
The _____ is an electrically operated, portable circular cutting saw that uses blades of various diameters.
Since the head of this saw can be turned to any desired angle, it is useful for removing damaged sections on a stringer
KETT SAW
The _________ , useful for cutting out damage, is similar to the Kett saw
pneumatic circular cutting saw
