Measurement Tools Flashcards
What are 4 steel rules and there uses?
Spring tempered-1/64 thick. Not to be bend. For accurate straight edge
Flexible- made of thin stock for curves
Narrow rule- for tight spaces
Hook rule- measuring from an edge
One complete revolution on a thimble is
What in inch ?
What in metric?
.025 inch per revolution
.5mm
What is an intrimik?
Measurement tool with 3 points of contact, self cantering with limited range .400 inch
6 inch steel rules can only measure up to?
For fraction, decimal, and metric
Fraction 1/64
Decimal 1/100 or .010
Metric .5mm
A vernier micrometer can measure up to?
.0001 inch or .002mm
Calipers are only dependable for measurements up to?
.001 inch
.02 mm
What are the 7 parts to a micrometer?
Anvil Spindle Sleeve Thimble Ratchet Locknut Frame
What is a basic measurement?
Basic measurement measures to within 1/64 or .5mm
Universal bevel protractors can discriminate to?
Plate and bevel protractors can discriminate to?
5 minutes of a degree
1 degree
What are the 3 precision calipers?
Vernier
Dial
Electronic digital
4R on a steel rules allows measurement in?
8th 16th 32nd and 64th
Transfer measuring instrument include (3)
calipers
telescoping gauges
small hole gauges
What are the types of calipers?
spring calipers
firm joint calipers
lock joint transfer calipers
What tools are used to measure a precise outside caliper diameter?an inside caliper diameter?
inside micrometer
outside micrometer
What are telescoping gauges used for?
Measuring bores, slot and recesses.
Name the 3 types of small hole gauges
twin ball
hardened ball
half ball
Angle of drill point gauges are
59 and 118
What are the 2 dial reading styles
balanced and continuous
What are 3 types of dial indicators
Bottom plunger- have plunger located at the bottom of the dial
Test indicators-can be used in awkard and inaccessible situations. Can be swiveled or dovetailed
Back Plunger- plungermounted 90 degree dial face. Common for shaft alignment
What are 5 comparison measurement tools?
squares drill size gauges drill point gauges radius gauges surface finish indicators
What is a dial bore gauge used for?
Used to measure various poisitions in the bore without making any adjustments.
What is a crankshaft deflection gauge used for?
Used for checking bearing alignment or shaft deflection without dismantling the engine or compressor.
The two (2) types of squares are?
solid square
combination square
What are the type of errors that you might encounter when using dial indicators?
spindle travelcosine error
What is spindle travel?
is when the spindle travels, the greater the distance there is to travel, the more errors can creep into an indicator reading
What is cosine error?
Cosine error is when the axis of the linear measurement is not in line with the axis of measurementdeveloping an exaggerated measurement
A vernier micrometer uses a scale of?
.0001 inch or .002mm
Each vernier scale graduation on a 50 division metric vernier height gauge is equal to what part in mm?
.02mm
What are the marking on a ruler called?
Graduations
What are the two(2) types of tapes?
short line(under 30 feet) Long line (up to 50 feet)
The most common unit used for angler measurements is?
degree
Universal bevel protractors can discriminate to what degree?
5 minutes of a degree
What are the two (2) ways to apply proper force to a micrometer?
ratchet stopthe feel method
Thickness gauges are also called?
Feeler gauges
The Distance of one revolution of a micrometer is?
.025 inch
.5mm
On the micrometer spindle there are, how many threads per inch?
40 threads per inch
Trammels are used when?
when you want to make a larger hole than the capacity of a scriber
Imperial inch decimal graduations rules are in graduations of?
Tenth .1
Twentieth .05
Fiftieth .02
Hundredth .01
Metric rules are graduated in?
Millimeters 1 mm
Half millimeter .5
The accuracy of a caliper is
.001 or .02mm
Standard micrometers can read to
.001 inch or .01mm
Adjustable parallels are used to measure
Keyway, keyseats, slots
Coupling gap
What are 2 materials for surface plates/layout tables?
Cast iron
Granite
What are the 3 accuracies of surface plates?
Grade AA .0001 Laboratory
Grade A .0002 Inspection
Grade B .0004 Toolroom
What is used to sharped a scriber, divider, caliper or trammel?
Oilstone
What are 3 accessories for a combination square?
Center Head
Bevel Protractor
Square Head
Surface Gauge vs Height gauge?
Surface gauge is for basic layout
Height gauge is used for precision layout up to .001 inch or .02 mm
Angle of a center punch and prick punch?
Prick punch 30-60
Center punch 90
What are the types of layout coatings?
Layout die (bluing) Copper suphate Vermillion Powder and Shellac Chalk Lime and Alcohol
A Datum edge is also a
Reference Point when laying out.
Absolute dimension vs incremental
Absolute measuring gives measurements from Datum Edge
Incremental uses measurement from point to point
How many graduations are in a vernier degree angle?
12 graduations adding to 60