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Micrometer screw gauge: a comprehensive guided
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Jan 28, 2025
Micrometer screw gauge
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0:00
all you need to know about micrometer
0:02
screw gauge micrometer screw gauge
0:04
comprehensive guide a micrometer screw
0:07
gauge is a Precision instrument used to
0:10
measure small dimensions for example
0:12
thickness of wires sheets with an
0:14
accuracy of 0.01 mm it operates on the
0:19
principle of a screw mechanism to
0:21
amplify small distances key components
0:24
of micrometer screw gauge frame you
0:27
shaped structure for stability Anvil and
0:30
spindle surfaces between which the
0:32
object is placed sleeve contains the
0:35
main scale millimeter and 0.5 mm marks
0:39
thimble rotating part with 50 divisions
0:42
for fine measurements ratchet ensures
0:45
consistent pressure to avoid
0:47
overtightening lock knot secures the
0:50
measurement the working principle of
0:52
micrometer screw gauge the spindle
0:54
advances when the thimble is rotated
0:57
pitch distance moved per full r ation
1:00
typically 0.5 mm least count smallest
1:05
measurable value equals pitch thimble
1:07
divisions equal 0.5 mm 50 = 0.01 mm
1:14
reading the micrometer step one read the
1:17
main scale on the sleeve visible mm
1:20
marks step two at 0.5 mm if the half mm
1:25
line on the sleeve is visible step three
1:28
read the thimble scale where it aligns
1:30
with the reference line multiply by 0.01
1:34
mm total reading equals main scale plus
1:37
half mm if applicable plus thimble
1:40
reading example main scale 5 mm half mm
1:45
line visible gives 5.5 mm thimble 25th
1:50
division gives 25 *
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0.01 =
1:55
0.5 mm total 5.5 + 0 0. to 5 =
2:02
5.75 mm zero error calibration close the
2:06
micrometer With No Object positive Z
2:09
error symol Z above the reference line
2:12
subtract from Readings negative 0 error
2:16
thimble zero below add to readings usage
2:19
steps one clean the Anvil and spindle
2:23
two place the object and rotate the
2:25
ratchet until it clicks three lock the
2:28
spindle with the lock nut four read the
2:31
measurement as outlined above
2:34
precautions avoid Parallax by viewing
2:36
scales directly use the ratchet to
2:39
prevent excess Force store in a dry
2:42
temperature stable environment regularly
2:45
check for zero errors applications
2:48
Precision Machining mechanical
2:50
engineering and Laboratories measuring
2:52
wired diameters sheet thickness and
2:55
small components types of micrometers
2:58
outside measures external Dimensions
3:01
most common inside measures internal
3:04
diameters depth measures Groove depths
3:07
key formulas least count equals pitch
3:11
number of thimble divisions total
3:13
reading equals main scale plus thimble
3:16
division times least count
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