Mitutoyo 129-130 Depth Micrometer, Interchangeable Rods 0-3", 4" Base

Part No. 129-130 | Mitutoyo Series 129

Product Description

The Mitutoyo 129-130 depth micrometer provides accurate depth measurement from 0 to 3" using three interchangeable measuring rods. Its 4" × .63" hardened, ground and micro-lapped base provides a stable reference surface across larger openings, housings, castings and flanges.

The three interchangeable ø4 mm rods extend the measuring range in 1" steps, allowing one instrument to cover depths throughout the 0–3" 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 129-130 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" base is particularly useful when a broader reference surface is needed across larger openings.

For measurements up to 4", see the Mitutoyo 129-131. For the same 0–3" range with a more compact 2.5" × .63" base, see the Mitutoyo 129-126.

Key Benefits

Full 0–3" range: three interchangeable rods cover the measuring range in 1" increments.

Precise readings: .001" graduation with ±.00012" micrometer head accuracy.

Stable reference base: the 4" × .63" base provides broad contact across larger openings.

Repeatable measuring force: the ratchet stop helps maintain consistent contact pressure.

Secure rod positioning: the measuring-rod clamp holds the selected rod firmly during measurement.

Flexible depth measurement: interchangeable rods allow multiple depths to be measured with one instrument.

Need a price or delivery time for the 129-130? Call +965 9807 4888 for a fast quote.

Who This Product Is Best For

The Mitutoyo 129-130 is suited to machine shops, mould and die makers, quality inspectors and maintenance teams that require reliable depth measurement up to 3" and benefit from a wide reference base.

It is useful for inspecting machined parts, checking counterbores and recessed features, verifying slot and keyway depths, and measuring step heights and shoulder distances across larger reference surfaces.

How to Use

1. Select the interchangeable rod appropriate for the required depth and secure it using the measuring-rod clamp.

2. Place the 4" base flat and square across the opening or reference surface.

3. Turn the micrometer thimble until the measuring rod contacts the bottom of the feature.

4. Finish the measurement using the ratchet stop to help apply consistent measuring force.

5. Read the sleeve and thimble and account for the selected rod length to determine the total depth.

6. For critical inspection work, verify the instrument against a suitable reference standard before measurement.

Frequently Asked Questions

What is the Mitutoyo 129-130 used for?

The 129-130 measures the depth of holes, slots, steps, recesses, counterbores and similar features from 0 to 3" using three interchangeable rods and a 4" × .63" base.

How accurate is the Mitutoyo 129-130?

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 129-130 uses three 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 129-130 and 129-131?

The 129-130 covers 0–3", while the 129-131 extends the measuring range to 0–4". Both are Series 129 depth micrometers with interchangeable rods and a wide reference-base design.

What is the difference between the 129-130 and 129-126?

Both models cover 0–3". The 129-130 has a 4" × .63" base, while the 129-126 has a more compact 2.5" × .63" base. The wider base provides a broader reference surface, while the compact base is suited to tighter access areas.

How do I buy the Mitutoyo 129-130 in Kuwait?

Call Al Belad General Tech Services on +965 9807 4888 or email mathews@generaltechkuwait.com for pricing and delivery information.