Mitutoyo 129-129 Depth Micrometer, Interchangeable Rods 0-2", 4" Base
Part No. 129-129 | Mitutoyo Series 129
Product Description
The Mitutoyo 129-129 depth micrometer provides accurate inch-based depth measurement from 0 to 2" using two interchangeable measuring rods. Its 4" × .63" hardened, ground and micro-lapped base provides a broad, stable reference surface across openings, shoulders and recessed features.
The two interchangeable ø4 mm rods extend the measuring range in 1" increments, allowing one instrument to cover depths throughout the 0–2" range. Each rod has a lapped measuring face, while the measuring-rod clamp secures the selected rod during use.
A ratchet stop helps maintain consistent measuring force for repeatable readings. With .001" graduation and ±.00012" micrometer head accuracy, the 129-129 is suited to dimensional inspection of machined components.
Typical applications include counterbore depths, slot and keyway depths, step heights, shoulder distances, holes and recessed features. The wide 4" × .63" base provides a broad reference surface for larger openings, housings, castings and flanges.
For a larger 0–3" measuring range with the same 4" × .63" base, see the Mitutoyo 129-130.
Key Benefits
Full 0–2" measuring range: two interchangeable rods cover the range in 1" increments.
Precise inch readings: .001" graduation with ±.00012" micrometer head accuracy.
Stable reference base: the 4" × .63" hardened, ground and micro-lapped base provides broad contact across the opening.
Repeatable measuring force: the ratchet stop helps maintain consistent contact pressure.
Secure rod positioning: the measuring-rod clamp holds the selected measuring rod firmly.
Flexible depth measurement: interchangeable rods allow multiple depth ranges to be measured with one instrument.
Need a price or delivery time for the 129-129? Call +965 9807 4888 for a fast quote.
Who This Product Is Best For
The Mitutoyo 129-129 is suited to machine shops, mould and die makers, quality inspectors and maintenance teams that require reliable inch-based depth measurement up to 2".
It is useful for checking first-off parts, verifying machined features between operations, measuring counterbores and recessed areas, and inspecting slot, keyway, step and shoulder dimensions.
The broad 4" × .63" base makes the 129-129 particularly suitable when a stable reference surface is useful across larger openings and component surfaces.
How to Use
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Select the interchangeable rod appropriate for the required depth and secure it using the measuring-rod clamp.
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Check the instrument against a suitable reference surface or standard before critical measurements.
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Place the base flat and square across the opening or reference surface.
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Turn the micrometer thimble until the measuring rod contacts the bottom of the feature.
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Finish the measurement using the ratchet stop to help apply consistent measuring force.
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Read the sleeve and thimble and account for the selected rod length to determine the total depth.
Frequently Asked Questions
What is the Mitutoyo 129-129 used for?
The 129-129 measures the depth of holes, slots, steps, recesses, counterbores and similar features from 0 to 2" using two interchangeable rods and a 4" × .63" base.
How accurate is the Mitutoyo 129-129?
The micrometer head has an accuracy of ±.00012". The interchangeable rod accuracy is specified as ±(2 + L/75) µm, where L is the maximum measuring length in millimetres.
How do the interchangeable rods work?
The 129-129 uses two ø4 mm interchangeable rods in 1" increments. Select the rod appropriate for the required depth, secure it with the clamp, and use the micrometer head for the final measurement.
What is the difference between the 129-129 and 129-130?
The 129-129 covers 0–2" using two interchangeable rods, while the 129-130 extends the range to 0–3" using three interchangeable rods. Both models use a 4" × .63" base.
What type of base does the 129-129 have?
The 129-129 has a 4" × .63" hardened, ground and micro-lapped base designed to provide a broad reference surface during depth measurement.
How do I buy the Mitutoyo 129-129 in Kuwait?
Call Al Belad General Tech Services on +965 9807 4888 or email mathews@generaltechkuwait.com for pricing and delivery information.
