Mitutoyo 129-111 Depth Micrometer, Interchangeable Rods 0-100mm, 63mm Base
Part No. 129-111 | Range 0–100 mm | Graduation 0.01 mm | Accuracy ±3 µm | 4 Interchangeable Rods
Product Overview
The Mitutoyo 129-111 depth micrometer is designed for accurate measurement of holes, slots, steps, recesses, counterbores and shoulder distances across a 0–100 mm range. Its hardened, ground and micro-lapped reference base provides a stable surface across the opening, while the micrometer head drives a Ø4 mm interchangeable measuring rod to the bottom of the feature.
Four interchangeable rods extend the measuring range in 25 mm steps, allowing one instrument to cover depths up to 100 mm. Each rod has a lapped measuring face, and the measuring rod clamp secures the selected rod during use. A ratchet stop helps maintain consistent measuring force for repeatable readings.
The 63.5 × 16 mm base is suited to applications where a compact reference surface is useful around narrow shoulders and smaller counterbores. The micrometer provides 0.01 mm graduation and ±3 µm accuracy for the micrometer head, while the interchangeable rods are specified at ±(2 + L/75) µm, where L is the maximum measuring length in millimetres.
For applications requiring a longer measuring range, the Mitutoyo 129-153 provides a 0–300 mm range with 12 interchangeable rods.
Key Benefits
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0–100 mm measuring range using 4 interchangeable rods.
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0.01 mm graduation for precise analog depth readings.
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±3 µm micrometer head accuracy.
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Hardened, ground and micro-lapped 63.5 × 16 mm reference base.
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Ø4 mm interchangeable rods with lapped measuring faces.
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25 mm rod increments for flexible depth measurement.
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Ratchet stop helps provide consistent measuring force.
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Measuring rod clamp secures the selected rod during measurement.
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Supplied in a fitted case for storage and protection.
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Suitable for counterbores, slots, keyways, steps, recesses and shoulder measurements.
Who This Product Is Best For
The Mitutoyo 129-111 is suitable for machine shops, mould and die makers, quality inspectors, maintenance teams and dimensional inspection applications requiring depth measurement up to 100 mm.
It can be used for first-off inspection, checking machined features between operations, verifying counterbore and slot depths, and measuring recesses or shoulder distances on manufactured components.
How to Use
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Select the interchangeable rod appropriate for the required measuring depth and secure it with the measuring rod clamp.
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Check the micrometer setting against a suitable reference such as a surface plate or gauge block.
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Position the 63.5 × 16 mm base flat and square across the feature opening.
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Turn the thimble to extend the rod toward the bottom of the feature.
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Finish the measurement using the ratchet stop to apply consistent measuring force.
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Read the sleeve and thimble, taking the selected rod's starting value into account when determining the total depth.
Frequently Asked Questions
What is the Mitutoyo 129-111 used for?
The 129-111 is used to measure the depth of holes, slots, steps, recesses, counterbores and similar internal features from 0 to 100 mm.
How accurate is the Mitutoyo 129-111?
The micrometer head accuracy is ±3 µm. The interchangeable rods have an accuracy specification of ±(2 + L/75) µm, where L is the maximum measuring length in millimetres.
How many interchangeable rods are supplied?
The 129-111 uses 4 interchangeable Ø4 mm rods with 25 mm increments to cover the 0–100 mm measuring range.
What is the base size?
The reference base measures 63.5 × 16 mm. Its specified flatness is 1.3 µm.
Does the Mitutoyo 129-111 use a battery?
No. The 129-111 is a mechanical analog depth micrometer and does not require a battery.
What is the difference between the 129-111 and 129-153?
The 129-111 covers 0–100 mm with 4 interchangeable rods and a 63.5 × 16 mm base. The 129-153 extends the range to 0–300 mm and uses 12 interchangeable rods.
How do I buy the Mitutoyo 129-111 in Saudi Arabia?
Contact General Tech Services in Dammam at +966 569 289 544 or email mathews@generaltechsaudi.com for pricing and availability.
