Small Tool Instruments
and Data Management

High-Accuracy Digimatic Micrometer
MDH-25MB

Catalog No. E12004(4)HIGH ACCURACYWorld's First

0.1 μm*Resolution
Digital Micrometer*0.1 µm=0.0001 mm"d2" is a generic name for Mitutoyo Digimatic output
compatible with up to 8 digits of I/O data.

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Easy, Rapid and High-accuracy
Measurement of Workpieces That
Require an Accuracy of 1 μm or Less
Delivering a Maximum Permissible Error JMPE of ±0.5 μm accuracy at 0.1μm resolution means Mitutoyo's MDH-25MB is the most accurate digital
micrometer available*, and this instrument will enable you to easily andrapidly measure workpieces that require very-high-accuracy measurement.
This remarkable performance has been attained thanks to Mitutoyo's
proprietary ABS (absolute) rotary encoder and high-accuracy thread
cutting technology.
*Mitutoyo's research as of July, 2018

Position and Merits of MDH-25MB
High accuracyStandard priceHigh priceStandard accuracy• Measuring accuracy equivalent to a laser
micrometer• No jig, etc. needed to be fabricated• Simple measurement enabled even forvery small parts• Portable and compatible with standard
workpiece measurement techniques,similar to conventional micrometers• Economical - low investment in equipment compared with other choices

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APPLICATION
Beyond the Usual Micrometer!
Many More Kinds of High-accuracy Parts Now Measurable.
This micrometer allows easy, rapid and high-accuracy measurement of workpieces that require ameasuring accuracy of 1 μm or less, such as medical parts, precision instruments and auto-parts
regarded as difficult to be accurately measured with conventional micrometers.

Manufacturing

4

Medical care

Pin gage measurement

Hypodermic needle measurement

Pin gages are widely used for measurement of
the diameter or center-to-center distance ofholes. The periodic calibration of a high-precision pin gage requires high-accuracy measurement.

To reduce injection pain as much as possible,
the outside diameter of hypodermic needle
tips has become much thinner. Some needles
have a tip diameter of just 0.2 mm, thus
requiring high-accuracy measurement.

Manufacturing

Electric/electronic devices

Fiber optics measurement

Gap gage calibration

The optical-transmission cylindrical "core" made of quartz glass is 0.01 to0.05 mm in diameter. Since its thickness is similar to a strand of hair, highaccuracy is required for its measurement.

Gap gages are widely used for easy measurement of small gaps in assemblies.
Periodic gage calibration is indispensable for accuracy control to detect
undue wear.

Medical care

Medical care

Gear tooth measurement

Implant measurement

Catheter measurement

As gears decrease in size and weight, the MDH
allows for convenient high accuracy evaluation.
MDH simply enables accuracy evaluation withit on hand for the customer demand of highaccuracy.

An abutment is used for dental implants.
Abutments have various lengths, angles, andmaterials. Each abutment needs to be madeand measured very accurately.

High-accuracy measurement is needed whenmanufacturing the fine tubing widely used in
the medical field, such as a catheter that plays
a crucial part in dilating a blood vessel.

Automobile and machine tools

Electric/electronic devices

Machine tools

Automobile/office equipment

Optical film measurement

Cutting tool measurement

Bearing measurement

Optical films are widely used to display still
images or moving images on a car navigationdevice or LCD TV. The micrometer accuracy is amust for measuring film thickness.

The diameter of extremely small drills used for
manufacturing precision tools and instruments
requires high accuracy measurement.

High-accuracy measurement is required for thecomponent parts of anti-friction ball and roller
bearings that are required to support vibration-free rotation in high-quality products.

5TECHNOLOGY
Ratchet thimble with an anti-friction bearing
Measurement repeatability has been improved by changing from sliding to rolling friction todramatically reduce the torque needed to operate the constant-force device. This makes
measurement even more consistent, even for operators new to this micrometer.

Heat transfer reduction with a heat shield
The influence of heat transferred to the micrometer
frame through hands has been reduced during
measurement with this micrometer by fitting thesupplied heat shield. The graph below shows that theheat shield almost eliminates thermally induced error
by minimizing thermal expansion of the frame.
Measurement error due to heat transferred from hands (measured at the anvil position)

ABS (absolute) rotary encoder with a resolution of 0.1 μm andhigh-accuracy thread cutting technology

Expansion (µm)
0.8
0.6
0.4
0.20-0.205The development of a 5000-division rotary encoder has achieved the unprecedented
resolution of 0.1 μm in a hand-held micrometer.
The commercialization of this ABS (absolute) encoder has also improved its reliability.
Additionally, since the spindle-thread pitch accuracy directly affects measuring accuracy,
Mitutoyo has developed a series of technologies from thread cutting technology to thread
evaluation technology, thereby guaranteeing the achievement of high accuracy.

With heat shield

101520Holding time (minutes)

Measurement environment: Room temperature 2030/humidity 50 %Metric293-100-100 – 25 mm

Zero-setting(INC measurementsystem):

The display can be zeroed at any position of the spindle, making comparison
measurement easier.
Returning to the absolute-measurement mode is easily accomplished.

Hold:

The displayed value is held while the spindle is withdrawn and the micrometer
moved so that the display can be read at the operator's convenience.

Resolution
switching:

The resolution of the display can be switched. If 0.1 μm measurement is not
required, the resolution can be switched to 0.5 μm.

Function lock:

Functions such as preset or zero-set can be locked to avoid inadvertently
changing the origin position.

On/off:

The power can be turned off after measurement is complete.
Even after the power is turned off, the origin or last zero-set position remains
in the memory.

Auto power off:

Even if the power is left on, the power turns off automatically if themicrometer is not used within a 20-minute period.

Dimensions

Measurement data
output:Measurement data can be output, allowing easy incorporation of this
instrument into a statistical process control or measurement system.

13.5

Error alarm:

In the unlikely event of a display overflow or calculation error, an error message
is displayed and measurement stops.
Measurement cannot continue until the error is corrected.
Also, if the battery voltage drops below a certain point, the battery indicator
will turn on before measurement becomes impossible, warning the user thatthe battery needs to be replaced.

Order No.
Measuring range
Resolution
Maximum permissible error JMPEJ MPE
Measuring surface
Measuring force
Measuring system
Mass
Power supply
Battery life

Inch/Metric293-130-10
0 – 1 in
0.000005 in/0.00002 in
0.0001 mm/0.0005 mm
0.0001 mm/0.0005 mm(switchable)(switchable)±0.5 μm±0.00002 in
0.3 μm/0.6 μm
0.000012 in/0.000024 inø3.2 mm
7 to 9 N
Electromagnetic induction type ABS rotary sensor
400 g (440 g with heat shield attached)
Lithium battery (CR2032) x 1
Approx. two years when used under normal conditions
Unit (mm)

450.4

72.7
15.8

2.5

ø25ø3.2ø6.35

25

58.9

The measurement origin can be preset to any value within the display range forconvenience in measuring.

178

625Specifications

Preset(ABS measurementsystem):24

FunctionsWithout heat shield

USABILITY

Reliable operation

Wear-resistant carbide tip

Versatile functionality enhances productivity
and ease of use

The sound of the ratchet provides a reliable
operation and repeatable measurements.

The ø3.2 mm carbide tip on the measuring
face is highly resistant to wear, allowing
accurate measurement for an extended periodof time.

This micrometer is equipped with many usefuland time-saving functions such as resolution
switching (0.0001 mm/0.0005 mm), function
lock, and presetting.

Absolute encoder

Zero-setting function

Built-in "Hold" function

The ABS (absolute) rotary encoder eliminates
the need for origin point setting at every
power-on, allowing immediate starting ofmeasurement.
This encoder achieves high reliability withoutcausing an overspeed error.

This function allows the displayed to be zeroset at any position, thus facilitating comparative measurement. Also the absolute value
from the origin can be restored.

This function can hold (freeze) the displayedvalue. Enables the micrometer to be removed
from a workpiece when the readout is noteasily viewable so that the measurement value
can be read at your convenience.

Measurement Data Recording Tools (Optional)

Standard accessories

Mini-printer equipped with data logger function
Digimatic mini processor DP-1VA LOGGER No. 264-505(See Catalog No. E12041)

The data logger function allows data output to a PC
and automatic logging of measurement data in an
Excel-format inspection certificate using Mitutoyo
USB-ITPAK. It provides significant potential forefficiency improvement in the QC function.

•H eat shield (04AAB969A: 293-100-10
04AAB969B: 293-130-10) x 1• L ithium battery (CR2032: Battery
supplied is for testing purpose only) x 1• S panner (200877) x 1• S crewdriver (04AAB985) x 1• L ens paper• Inspection certificate

Optional accessories

DP-1VA LOGGER• L ens paper x 1,000 (04AZB581)• Wired Connection to PC via USB Input Tool Series (Refer to Catalog E12007)

USB-ITN-B

USB

IT-016UUSBPC

USB-ITN-B (2 m):06AFM380B

Connecting cables specific to outputfunction equipped models
1 m: 05CZA662
2 m: 05CZA663

IT-016U:264-016-10• Wireless Connection to PC via U-WAVE (Refer to Catalog E12000)
U-WAVE-T (IP67):02AZD730G
U-WAVE-T (with buzzer):02AZD880G

For standard use (160 mm): 02AZD790B
For foot switch use: 02AZE140B

U-WAVE-TPC

USB
U-WAVE-R
U-WAVE-R: 02AZD810D

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130 2012(4)e(PA)HS-(JP10), Printed in Japan

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used in modern measuring technology. We can also
design, build, test and deliver bespoke measuringsolutions and even, if deemed cost-effective, takeyour critical measurement challenges in-house on a
sub-contract basis.

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