Mitutoyo 122-128-10 | Blade Micrometer | Series 122 | Graduation: 0.0001 inch | Accuracy +/- 0.00015 inch | Range 3 to 4 inch
Mitutoyo 122-128-10 Blade Micrometer, 3–4" – Type A, .0001" Graduation
Mitutoyo 122-128-10 Blade Micrometer 3-4" | KSA
PRODUCT SUMMARY
The Mitutoyo 122-128-10 Series 122 blade micrometer measures narrow grooves, keyways and recessed features from 3–4". It provides .0001" graduation, ±.0002" accuracy and a non-rotating spindle with a 0.75 mm Type A hardened steel blade for controlled inch measurement.
PRODUCT DESCRIPTION
The Mitutoyo 122-128-10 is a Series 122 mechanical blade micrometer designed for measuring groove diameters, keyways and recessed features that are difficult to access with conventional micrometers. Its 3–4" measuring range makes it suitable for larger shafts, bearing journals, gearbox components, compressor shafts and other precision-machined parts.
The Type A measuring design uses a 0.030" (0.75 mm) thick hardened steel blade to reach into narrow grooves and slots. The blade-shaped measuring surfaces are suited to applications such as keyways, snap-ring grooves, spline roots and O-ring grooves where conventional measuring faces may not provide adequate access.
The micrometer features a non-rotating spindle, allowing the blade to remain aligned with the feature as the spindle advances. This helps maintain controlled contact when measuring narrow grooves and recessed surfaces, particularly during repeated dimensional inspection.
A ratchet stop provides a controlled measuring force of 3–8 N, helping maintain consistent contact pressure between measurements. The micrometer provides .0001" graduation and ±.0002" accuracy, with .00016" parallelism of the measuring faces.
The satin chrome thimble and sleeve provide an analog mechanical reading surface designed for clear use in workshop and inspection environments. Since the measuring range starts at 3", a setting standard is supplied for zero-setting and measurement reference. The main unit weighs approximately 525 g and is supplied in a fitted protective case.
For a smaller measurement range, the Mitutoyo 122-127-10 covers 2–3" and uses the same Series 122 blade-micrometer concept.
KEY BENEFITS
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3–4" measuring range: Suitable for groove and keyway measurement on larger shafts and components.
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Type A blade design: Uses a 0.030" (0.75 mm) hardened steel blade for narrow-feature access.
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±.0002" accuracy: Supports precision dimensional inspection within the specified range.
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.0001" graduation: Provides direct inch measurement for inch-dimensioned drawings.
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Non-rotating spindle: Keeps the blade aligned with the measured feature during operation.
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Controlled measuring force: Ratchet stop provides a 3–8 N measuring force for repeatable measurements.
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.00016" parallelism: Supports consistent contact between the measuring faces.
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Satin chrome finish: Provides a readable mechanical scale under typical workshop lighting.
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Setting standard included: Allows zero-setting for the 3–4" measuring range.
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Fitted protective case: Provides dedicated storage and protection for the micrometer.
For pricing and delivery information in Saudi Arabia, contact General Tech Services on +966 53 132 1586 or mathews@generaltechsaudi.com.
WHO THIS PRODUCT IS BEST FOR
The Mitutoyo 122-128-10 is suitable for rotating-equipment workshops, gearbox rebuilding facilities, heavy machining operations, industrial maintenance departments and dimensional inspection teams.
It can be used by machinists checking component dimensions during production, quality inspectors verifying first-off parts and maintenance engineers inspecting shafts and bearing-related features before repair or rebuilding.
Typical applications include measuring shaft grooves, keyways, snap-ring grooves, spline roots and O-ring grooves on gearbox shafts, compressor shafts, motor shafts and other components within the 3–4" range.
It is particularly suited to workshops where engineering drawings and component dimensions are specified in inches, allowing measurements to be read directly without unit conversion.
HOW TO USE / HOW IT WORKS
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Clean the measuring faces and workpiece to remove dirt, chips or other particles.
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Check the micrometer against the supplied setting standard and verify the zero/reference condition.
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Open the micrometer enough to position the blade around the groove, keyway or recessed feature.
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Position the blade squarely against the feature being measured.
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Operate the ratchet stop until the measuring faces make controlled contact with the part.
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Read the sleeve and thimble scale using the .0001" graduation.
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Record the measurement while maintaining the correct measuring position.
For precision inspection, keep the measuring surfaces and component clean and follow the applicable inspection procedure for the part.
FREQUENTLY ASKED QUESTIONS
What is the Mitutoyo 122-128-10 used for?
The Mitutoyo 122-128-10 is a Series 122 blade micrometer designed for measuring narrow grooves, keyways, snap-ring grooves, spline roots and similar recessed features within the 3–4" range.
What is the measuring range?
The measuring range is 3–4" (76.2–101.6 mm).
How accurate is the Mitutoyo 122-128-10?
The specified accuracy is ±.0002", with .0001" graduation and .00016" parallelism.
What type of blade does the 122-128-10 use?
It uses a Type A hardened steel blade with a thickness of .030" (0.75 mm).
Why does this micrometer use a non-rotating spindle?
The non-rotating spindle keeps the blade aligned with the measured feature as it moves. This is useful for narrow grooves and keyways where controlled blade positioning is important.
What measuring force does the ratchet stop provide?
The specified measuring force is 3–8 N through the ratchet stop.
Is a setting standard included?
Yes. A setting standard is supplied because the 122-128-10 has a 3–4" range rather than starting at zero. It can be used to establish the appropriate reference before measurement.
Is the 122-128-10 an inch micrometer?
Yes. The 122-128-10 is an inch mechanical micrometer with .0001" graduation.
What is the difference between the 122-127-10 and 122-128-10?
The 122-127-10 covers 2–3", while the 122-128-10 covers 3–4". Both are Series 122 blade micrometers intended for groove and recessed-feature measurement.
What is the difference between Mitutoyo 122-128 and 122-128-10?
Both part numbers are associated with the Series 122 3–4" blade micrometer. The 122-128-10 is the order number supplied for this product listing. If both numbers appear in your catalogue or store, confirm the applicable current order number before creating duplicate product pages.
How can I buy the Mitutoyo 122-128-10 in Saudi Arabia?
Contact General Tech Services at +966 53 132 1586 or mathews@generaltechsaudi.com for pricing and delivery information.
