Mitutoyo 122-104 Blade Micrometer, Hardened Steel Blade 75-100mm, 0.75mm Blade
Part No. 122-104 | Range 75–100 mm | Graduation 0.01 mm
Product Overview
The Mitutoyo 122-104 Series 122 blade micrometer is designed for measuring groove diameters, keyways, snap-ring grooves, spline roots and other recessed features that can be difficult to access with a conventional micrometer. It provides a 75–100 mm measuring range, 0.01 mm graduation and ±4 µm accuracy for metric dimensional inspection.
Its Type A hardened steel blade is 0.75 mm thick, providing access to recessed features while supporting regular workshop measurement. The non-rotating spindle keeps the blade aligned with the groove as the micrometer closes, while the ratchet stop provides a specified 3–8 N measuring force.
The satin chrome thimble and sleeve provide a clear analog scale for measurement. A standard bar is included for zero-setting, and the micrometer is supplied in a fitted protective case.
For a larger measurement range, see the Mitutoyo 122-105 blade micrometer covering 100–125 mm.
Key Benefits
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Reach recessed features: The blade-shaped measuring surfaces provide access to grooves, keyways and other narrow features across the 75–100 mm range.
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±4 µm accuracy: Suitable for dimensional inspection and close-tolerance machining applications.
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0.01 mm graduation: The metric analog scale provides straightforward measurement readings.
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Non-rotating spindle: Keeps the blade aligned with the groove during measurement and reduces twisting against the workpiece.
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Consistent measuring force: The ratchet stop provides a specified 3–8 N measuring force.
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Type A hardened steel blade: The 0.75 mm blade provides access to recessed features for routine industrial measurement.
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Satin chrome finish: The thimble and sleeve provide a clear mechanical scale for reading measurements.
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Zero-setting support: A supplied standard bar allows the micrometer to be checked and set before use.
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Protective storage: The fitted case helps protect the instrument when it is not in use.
Need pricing or delivery information for the 122-104? Call +966 53 132 1586 for a quote.
Who This Product Is Best For
The Mitutoyo 122-104 is suitable for machining workshops, gearbox rebuilders, rotating-equipment maintenance teams, quality-control departments and plant maintenance operations requiring groove and keyway measurement in the 75–100 mm range.
It can be used by quality inspectors checking finished dimensions, machinists verifying features during production and maintenance engineers measuring shafts before repair or refurbishment. It is particularly suited to applications where recessed dimensions cannot be reached effectively with conventional micrometer measuring surfaces.
How to Use
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Clean the blade faces and the workpiece before measurement.
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Check the micrometer against the supplied standard bar and verify the zero setting.
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Open the micrometer slightly beyond the feature being measured.
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Position the blade-shaped measuring surfaces squarely inside the groove or keyway.
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Close the micrometer using the ratchet stop until the specified measuring force is applied.
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Read the sleeve and thimble scale while the micrometer remains correctly positioned on the workpiece.
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Record the measurement and clean the measuring surfaces after use.
Frequently Asked Questions
What is the Mitutoyo 122-104 blade micrometer used for?
The 122-104 is designed for measuring groove diameters, keyways, snap-ring grooves, spline roots and other recessed features within its 75–100 mm range. Its blade-shaped measuring surfaces provide access where conventional micrometer measuring surfaces may not fit.
How accurate is the Mitutoyo 122-104?
The 122-104 has a stated accuracy of ±4 µm and a graduation of 0.01 mm. Its specified parallelism is based on the Series 122 specification of (3 + R/100) µm for models over 75 mm, where R is the maximum measuring range.
Why does the 122-104 use a non-rotating spindle?
The non-rotating spindle helps keep the blade aligned with the groove as the micrometer closes. This reduces twisting between the measuring surfaces and the workpiece and supports consistent measurement positioning.
What blade does the Mitutoyo 122-104 use?
The 122-104 uses a Type A hardened steel blade with a thickness of 0.75 mm. This blade configuration is intended for general-purpose groove and keyway measurement.
What measuring force does the 122-104 provide?
The specified measuring force is 3–8 N, applied through the ratchet stop.
Which Series 122 micrometer covers the next range?
The Mitutoyo 122-105 covers the next metric range of 100–125 mm and uses the same Series 122 blade-micrometer design.
Is a setting standard included?
Yes. A standard bar is supplied for zero-setting because the 122-104 measuring range begins at 75 mm rather than zero. The instrument is also supplied in a fitted case.
How can I buy the Mitutoyo 122-104 in Saudi Arabia?
Call General Tech Services on +966 53 132 1586 or email mathews@generaltechsaudi.com to request pricing and delivery information for the Mitutoyo 122-104.
