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How to Read the Scale Measuring Force Limiting Device
Micrometer with standard scale (graduation: 0.01 mm) Audible in One-
operation handed Remarks
(1) 45 (1) Sleeve scale reading 7. mm operation
(2) Thimble scale reading + 0.37 mm
05 40 Ratchet stop
35 Micrometer reading 7.37 mm
(2) Note) 0.37 mm (2) is read at the position where the sleeve Yes Unsuitable Audible clicking operation causes
micro-shocks
index line is aligned to the thimble graduations.
30
The thimble scale can be read directly to 0.01 mm, as shown above, but may Friction thimble No Suitable Smooth operation without shock or B
also be estimated to 0.001 mm when the lines are nearly coincident because (F type) sound
the line thickness is 1/5 of the spacing between them.
Ratchet thimble
Approx. +1 µm Approx. +2 µm (T type) Yes Audible operation provides
Suitable confirmation of constant measuring
(1) 30Index line
25 force
Index line Thimble scale 0 20 (2) Thimble scale Audible operation provides
8 Suitable confirmation of constant measuring
force
6
4
2 Ratchet thimble
Micrometer with vernier0 sc5ale (g1r5aduation: 0.001 mm) Yes
The vernier scale provided above the sleev1e0index line enables direct readings
to be made to within 0.001 mm.
0 30 (1) Sleeve scale reading 6. mm Measuring Face Detail
8 25
6 (2) Thimble scale reading .21 mm 30’
(3) 4 20 (2)
2 (3) Reading from the vernier scale marking
15
05 and thimble graduation line + .003 mm spindle
10 6.35
Micrometer reading 6.213 mm 7.95 6.3
(1)
Note) 0.21 mm (2) is read at the position where the index line is between two Carbide tip
graduations (21 and 22 i0n this case). 03.0003 mm (3) is read at the position 30’
where one of the(v3e) rnier8642 graduations 2a5ligns with one of the thimble
graduations. 20 (2)
Micrometer with mechanica0l-di5git dis1p5lay (digital step: 0.001 mm) spindle
Third d(e1c)imal p1la0ce on vernier scale ( 0.001 mm units) 8
5 Carbide tip
These drawings above are for illustration only and are not to scale
6
4
20
(1) 0 45
0 29 9
mm Vernier reading 0.004 mm (2)
Index line .004 mm (2)
Third decimal place .09 mm
Second decimal place .9 mm (1)
First decimal place 2. mm *Indicates four digits.
Millimetres 00. mm
+ Tens of mm 2.994 mm
Counter reading
Note) 0.004 mm (2) is read at the position where a vernier graduation aligns with
one of the thimble graduation lines.
B-76
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