Mitutoyo 122-142 Blade Micrometer, Carbide-Tipped Blade 25-50mm, 0.4mm Blade
Part No. 122-142 | Range 25–50 mm | Graduation 0.01 mm | Accuracy ±3 µm
General Tech Services · Dammam, Saudi Arabia · +966 53 132 1586 · mathews@generaltechsaudi.com
Product Overview
The Mitutoyo 122-142 Series 122 blade micrometer is designed for measuring narrow grooves, keyways, snap-ring grooves, spline roots and O-ring grooves that are difficult to access with a conventional micrometer. Its Type D carbide-tipped blade provides a 25–50 mm measuring range with 0.01 mm graduation and ±3 µm accuracy.
The 0.4 mm carbide-tipped blade is designed to enter narrow measurement features while providing improved wear resistance for demanding inspection work. The non-rotating spindle keeps the blade aligned with the groove as it closes, helping reduce twisting between the measuring faces and the workpiece.
A ratchet stop provides a controlled 3–8 N measuring force, supporting consistent readings between operators and repeated inspections. The satin chrome thimble and sleeve provide a clear mechanical metric scale, while the supplied standard bar allows convenient zero-setting before measurement.
The 122-142 is particularly useful for CNC machining, component inspection, maintenance and repair applications where groove dimensions need to be checked accurately. It is supplied in a fitted protective case for storage and transport.
For larger components requiring a 50–75 mm range, consider the Mitutoyo 122-103 blade micrometer.
Key Benefits
-
Narrow-feature measurement: The Type D blade design provides access to grooves, keyways and other restricted features within the 25–50 mm range.
-
Precise inspection: ±3 µm accuracy and 0.01 mm graduation support detailed dimensional measurement.
-
Carbide-tipped blade: The 0.4 mm carbide-tipped blade provides enhanced resistance to wear in demanding applications.
-
Non-rotating spindle: Keeps the blade aligned with the groove and reduces twisting during measurement.
-
Consistent measuring force: The ratchet stop provides a controlled 3–8 N measuring force.
-
Clear mechanical scale: Satin chrome thimble and sleeve provide a readable metric measurement scale.
-
Convenient zero-setting: A standard bar is supplied for checking and setting the micrometer before use.
-
Protective storage: The instrument is supplied in a fitted case.
For pricing and delivery information for the Mitutoyo 122-142 in Saudi Arabia, call +966 53 132 1586.
Who This Product Is Best For
The Mitutoyo 122-142 is suitable for CNC turning and machining shops, automotive component manufacturers, pump and valve repair workshops, maintenance teams and quality-control departments working with components containing narrow grooves or keyways.
It can be used by quality inspectors checking first-off components, machinists verifying dimensions during production and maintenance engineers measuring shafts and other components before repair or replacement.
The 25–50 mm range makes it suitable for metric drawings and components where the measuring feature is located inside a narrow slot or groove. The carbide-tipped blade is particularly useful when repeated inspection or harder workpiece materials increase blade wear.
How to Use
-
Clean the blade faces and the measurement feature before taking a reading.
-
Check the micrometer against the supplied standard bar and confirm the zero setting.
-
Open the micrometer slightly wider than the feature being measured.
-
Position the blade-shaped measuring faces squarely inside the groove or keyway.
-
Turn the ratchet stop until it clicks two or three times to apply the controlled measuring force.
-
Read the sleeve and thimble scale at the 0.01 mm graduation.
-
Record the measurement while the micrometer remains correctly positioned on the feature.
-
Clean the measuring faces after use and store the instrument in its fitted case.
Frequently Asked Questions
What is the Mitutoyo 122-142 blade micrometer used for?
The 122-142 is designed for measuring groove diameters, keyways, snap-ring grooves, spline roots, O-ring grooves and other narrow features within its 25–50 mm measuring range.
How accurate is the Mitutoyo 122-142?
The 122-142 has ±3 µm accuracy and a 0.01 mm graduation. The specified parallelism of the measuring faces is 3 µm.
Why does the Mitutoyo 122-142 use a non-rotating spindle?
The non-rotating spindle keeps the blade aligned with the groove as the spindle closes. This helps reduce twisting between the blade and workpiece and supports consistent measurements.
What type of blade does the Mitutoyo 122-142 have?
The 122-142 uses a Type D carbide-tipped blade with a 0.4 mm blade thickness. The carbide construction is intended to provide increased wear resistance compared with conventional hardened-steel blades.
Which 25–50 mm Series 122 blade micrometer should I choose?
The choice depends on the groove geometry, blade thickness required and application. The 122-142 uses a 0.4 mm carbide-tipped blade. Other 25–50 mm Series 122 options include the 122-162 with a 0.75 mm carbide-tipped blade, the 122-112 with a 0.4 mm hardened-steel blade and the 122-102 with a 0.75 mm hardened-steel blade.
Is a setting standard included with the Mitutoyo 122-142?
Yes. A standard bar is supplied for zero-setting because the measuring range begins at 25 mm rather than zero. The micrometer is also supplied in a fitted protective case.
How do I buy the Mitutoyo 122-142 in Saudi Arabia?
Contact General Tech Services on +966 53 132 1586 or email mathews@generaltechsaudi.com for pricing and delivery information. General Tech Services also provides dimensional calibration services for measuring instruments.
