Mitutoyo 129-149 Depth Micrometer, Interchangeable Rods 0-12", 2.5" Base
Part No. 129-149 | Mitutoyo Series 129
Product Description
The Mitutoyo 129-149 depth micrometer provides accurate depth measurement from 0 to 12" using 12 interchangeable measuring rods. Its compact 2.5" × .63" hardened, ground and micro-lapped base provides a stable reference surface while fitting into narrower shoulders, smaller openings and recessed features where a wider base may be less convenient.
The 12 interchangeable ø4 mm rods extend the measuring range in 1" steps, allowing one instrument to cover depths throughout the 0–12" range. Each rod has a lapped measuring face, while the measuring-rod clamp secures the selected rod during measurement.
A ratchet stop helps maintain consistent measuring force for repeatable readings. The .001" graduation and ±.00012" micrometer head accuracy make the 129-149 suitable for dimensional inspection of machined components.
Typical applications include counterbore depths, slot and keyway depths, step heights, shoulder distances, holes and recessed features.
For a wider base across larger openings, see the Mitutoyo 129-150, which has the same 0–12" range with a 4" × .63" base. For measurements up to 6", see the Mitutoyo 129-128.
Key Benefits
Broad measuring range: 12 interchangeable rods cover 0–12" in 1" increments.
Precise readings: .001" graduation with ±.00012" micrometer head accuracy.
Compact reference base: the 2.5" × .63" base is suited to narrower shoulders and smaller openings.
Repeatable measuring force: the ratchet stop helps maintain consistent contact pressure.
Secure rod positioning: the measuring-rod clamp holds the selected rod firmly.
Interchangeable measurement system: one depth micrometer covers multiple measuring depths without requiring a separate instrument for each range.
Need a price or delivery time for the 129-149? Call +965 9807 4888 for a fast quote.
Who This Product Is Best For
The Mitutoyo 129-149 is suited to machine shops, mould and die makers, quality inspectors and maintenance teams that require depth measurements up to 12" but benefit from a compact reference base.
It is useful for inspecting machined parts, checking counterbores and recessed features, verifying step heights and shoulder distances, and measuring dimensions between machining operations.
How to Use
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Select the interchangeable rod that covers the required measuring depth and secure it using the measuring-rod clamp.
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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.
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For critical inspection applications, verify the instrument against a suitable reference standard before measurement.
Frequently Asked Questions
What is the Mitutoyo 129-149 used for?
The 129-149 measures the depth of holes, slots, steps, recesses, counterbores and similar features from 0 to 12" using 12 interchangeable rods and a compact 2.5" × .63" base.
How accurate is the Mitutoyo 129-149?
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 129-149 uses 12 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 129-149 and 129-150?
Both models cover 0–12". The 129-149 has a compact 2.5" × .63" base, while the 129-150 has a wider 4" × .63" base. The 129-149 is useful where a narrower base is preferred, while the wider 129-150 provides a broader reference surface across larger openings.
What is the difference between the 129-149 and 129-128?
The 129-149 covers 0–12" with 12 interchangeable rods. The 129-128 covers 0–6", making it suitable when the required measuring depth does not exceed 6".
How do I buy the Mitutoyo 129-149 in Kuwait?
Call Al Belad General Tech Services on +965 9807 4888 or email mathews@generaltechkuwait.com for pricing and delivery information.
