Data Sheet
Mechanical Micrometers Sets
Date: 18-11-2010
Page: 1 of 4
Each set contains 6 micrometers and 5 setting rods
Sets supplied in deluxe fitted cases
Accuracy conforms to DIN 863
Resolution: Metric 0.01mm, Inch 0.0001”
Models above 25mm / 1” supplied with setting rod
Micro fine graduations for accurate reading
Tungsten carbide measuring faces
Spindle locking lever
Ratchet stop
Non-glare satin chrome barrel and sleeve
Blue baked enamel hammer tone finish
Supplied in fitted case with adjustment tools
Code
50-200-150
50-200-006
Metric Range
mm
0-150
Graduation
mm
0-01
Inch Range
inch
0-6
Graduation
inch
0-0001
Micrometers
In set
6
6
Setting Rods
In Set
5
5
Specifications
Style A
Style A
Range
Metric
mm
0-25
25-50
50-75
75-100
100-125
125-150
Range
Inch
inch
0-1
1-2
2-3
3-4
4-5
5-6
A
mm
6.0
8.0
8.0
8.0
8.0
8.0
B
mm
24
32
45
57
70
82
C
mm
3.0
3.0
3.0
3.0
3.0
3.0
L
mm
32
57
82
107
133
158
Accuracy
mm
0.004
0.004
0.005
0.005
0.006
0.006
Data Sheet
Mechanical Micrometers Sets
Instructions and Care
Date: 18-11-2010
Page: 2 of 4
Check all new and in use micrometers for correct zero setting prior to use
Clean micrometer spindle and measuring anvils with soft cloth or paper to remove any oil or particles which may
affect the measurements
Ensure that the micrometer is thermally stabilised with the temperature where it is to be used
Larger micrometers should be clamped in a suitable stand to make setting easier
Ensure that the spindle lock is off
For 0-25mm and 0-1” micrometers: Advance the spindle towards the fixed anvil. Use the ratchet stop to finally
close the 2 anvils together. Rotate the ratchet stop 1 ½ to 2 revolutions to exert a constant measuring force
For larger micrometers a setting standard should be placed between the anvils and the ratchet stop should be used
as above to obtain the zero position
In the closed position the zero position on the thimble should coincide with the horizontal line on the sleeve
If the two lines do not coincide, small adjustments can be made by using the “C” spanner provided
Insert the “C” spanner into the hole at the back of the sleeve and gently turn the sleeve in the direction required to
achieve line up
The micrometer is now set and ready for use
Clean micrometers and check zero position regularly during use to ensure their continued accuracy
After use always clean and replace the micrometer in its box
1
2
3
4
5
6
7
8
9
10
11
12
13
Heat Resistant Plate
Frame
Anvil
Spindle
Spindle Lock
Sleeve
Thimble
Barrel
Taper
End Cap
Ratchet Stop
Spanner
Setting Standard
Copyright: Linear Tools 2010
Data Sheet
Mechanical Micrometers
Reading the Micrometer
Date: 18-11-2010
Page: 3 of 4
When reading the micrometer ensure that your line of sight is directly above the graduated scale on the sleeve and
the thimble scale to avoid parallax reading errors
Ensure that the micrometer and the work piece are at the same temperature
Handle the instrument with care, if it is dropped or knocked in any way it must be rechecked for correct working
and accuracy as above
Reading Examples: Metric
Reading Examples: Inch
Copyright: Linear Tools 2010
Data Sheet
Mechanical Micrometers
Cleaning and Basic Checking Procedure
Date: 18-11-2010
Page: 4 of 4
Remove any oil, grease, dust or small particles which may cause damage to the micrometer or affect its accuracy
when taking measurements. Use a soft lint free cloth or paper together with a proprietary instrument cleaning
agent. Do not use acetone as this can damage parts of the micrometer
Before use check that the ratchet mechanism functions correctly
Check the spindle movement by using the ratchet stop to traverse the spindle though it’s complete travel
Check that the measuring faces are in good condition
Check the locking mechanism works correctly
Zero Point Checking and Adjustment
Use the ratchet stop to move the spindle until it touches the fixed anvil. Allow the ratchet to turn 1 ½ to 2
revolutions for the final positioning
The zero point on the thimble should now coincide with the reference graduated base line on the sleeve
For micrometers above 25mm / 1” use the supplied setting standard or a gauge block to check the zero position
If the zero point does not line up as required, it can be corrected by using the following procedure
When the zero point deviation on the thimble is under 2 divisions from the graduated base line
Turn the sleeve using the “C” spanner provided until correct alignment is achieved
When the zero point deviation on the thimble is over 2 divisions from the graduated base line
Hold the frame and the thimble and loosen the ratchet stop using the spanner provided
Disconnect the coupling of the thimble to the spindle by giving a light shock to the side of the thimble
Turn the thimble until the zero point is in alignment with the base line on the sleeve
Press the thimble against the spindle and re tighten with the spanner to achieve a positive coupling
Re check the zero position, any final small adjustment can now be made using the “C” spanner to re position the
sleeve to the thimble zero
Copyright: Linear Tools 2010
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