Mitutoyo 129-112 Depth Micrometer, Interchangeable Rods 0-150mm, 63mm Base

Part No. 129-112 | Mitutoyo Series 129

Product Description

The Mitutoyo 129-112 depth micrometer provides accurate metric depth measurement from 0 to 150 mm using six interchangeable measuring rods. Its 63.5 × 16 mm hardened, ground and micro-lapped base provides a compact reference surface for measuring features where a wider base may overhang the available area.

The six interchangeable ø4 mm rods extend the measuring range in 25 mm increments, allowing one instrument to cover depths throughout the 0–150 mm 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 0.01 mm graduation and ±3 µm micrometer head accuracy, the 129-112 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 compact base is particularly useful for narrower shoulders, smaller openings and recessed areas where a wider depth-micrometer base could interfere with the surrounding surface.

For the same 0–150 mm range with a wider 101.6 × 16 mm base, see the Mitutoyo 129-116. For measurements up to 100 mm, see the Mitutoyo 129-111.

Key Benefits

Full 0–150 mm measuring range: six interchangeable rods cover the range in 25 mm increments.

Precise metric readings: 0.01 mm graduation with ±3 µm micrometer head accuracy.

Compact reference base: the 63.5 × 16 mm hardened, ground and micro-lapped base suits 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 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 129-112? Call +965 9807 4888 for a fast quote.

Who This Product Is Best For

The Mitutoyo 129-112 is suited to machine shops, mould and die makers, quality inspectors and maintenance teams that require reliable metric depth measurement up to 150 mm.

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 compact 63.5 × 16 mm base makes the 129-112 particularly useful where measurement access is restricted or a larger reference base could overhang the component.

How to Use

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

2. Check the instrument against a suitable reference surface or standard before critical measurements.

3. Place the base flat and square across the opening or reference surface.

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

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

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

Frequently Asked Questions

What is the Mitutoyo 129-112 used for?

The 129-112 measures the depth of holes, slots, steps, recesses, counterbores and similar features from 0 to 150 mm using six interchangeable rods and a 63.5 × 16 mm base.

How accurate is the Mitutoyo 129-112?

The micrometer head has an accuracy of ±3 µm. 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 129-112 uses six ø4 mm interchangeable rods in 25 mm 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 129-112 and 129-116?

Both models cover 0–150 mm and use six interchangeable rods. The 129-112 has a compact 63.5 × 16 mm base, while the 129-116 has a wider 101.6 × 16 mm base. The 129-112 is useful where a narrower reference base is preferred, while the 129-116 provides a broader reference surface.

What is the difference between the 129-112 and 129-111?

The 129-112 covers 0–150 mm using six interchangeable rods. The 129-111 covers 0–100 mm, making it suitable when the required measuring depth does not exceed 100 mm.

How do I buy the Mitutoyo 129-112 in Kuwait?

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