What is the measuring range of this inside micrometer?

With the included extension rods, you can measure internal dimensions from 50 to 300 mm.

What is the graduation of the Mitutoyo 137-202?

The vernier scale features a graduation of 0.01 mm for precise readings.

Which extension rods are included in this set?

The set includes solid extension rods of 13 mm, 25 mm, 50 mm (two pieces), and 100 mm.

What is the travel range of the micrometer head?

The micrometer head itself has an adjustment travel of 13 mm.

What are the main applications for this tubular inside micrometer?

It is designed for measuring inside diameters of cylinders, bores, rings, and parallel surfaces.

MITUTOYO 137-202 spear caliper with extensions 50-300mm

Name: MITUTOYO 137-202 spear caliper with extensions 50-300mm
Brand: MITUTOYO
SKU: 41012375
Price: 374.2 EUR
Availability: PreOrder

Supplier number: MITUTOYO 137-202 | EAN 4946368438337

374.20 tax incl.

€309.26 excl. VAT (incl. all environmental contributions)

On order: delivered from 16/10/2026

set

Ordered before 20:00 - delivered as of 16/10/2026
Free shipping
Delivery by DHL

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Accurate internal measurements with the Mitutoyo micrometer

Practical benefits

Adaptable wide measuring range: You easily combine the extension rods to measure internal dimensions from 50 to 300 mm with dependable accuracy.
Exact fine reading scale: The precise 0.01 mm graduation allows you to capture exact dimensional data across diverse cylindrical workpieces.
Rigid and stable construction: Solid extension rods ensure superior dimensional rigidity and repeatable results during demanding measurement tasks in the workshop.

In a nutshell

The right choise for

With the Mitutoyo 137-202 inside micrometer, you take high-precision internal measurements across your workshop tasks with ease. Thanks to the interchangeable solid extension rods of 13 mm, 25 mm, two 50 mm rods, and 100 mm, you adapt the tool to cover a wide measuring range from 50 to 300 mm. This allows you to inspect cylinders, deep bores, rings, and parallel surfaces accurately without switching between multiple fixed micrometers. The micrometer head provides an adjustment travel of 13 mm, while the 0.01 mm graduation ensures exact and dependable readings every time. Its rigid construction delivers consistent repeatability for precision mechanical work.

Product information FAQ

€374.20

tax incl.

Key features according to our expert

Micrometer type: Inside micrometer
Min. measuring value: 50 mm
Max. measuring value: 300 mm
Scale division: 0,01 mm mm

Product description:

This is an extension rod type inside micrometer that offers you the following benefits:
- Interchangeable extensions with cylindrical gage rods are spring-mounted in protective sleeves so you can extend the measuring range.
- Carbide measuring faces are available.

All Features

Micrometer type: Inside micrometer
Min. measuring value: 50 mm
Max. measuring value: 300 mm
Scale division: 0,01 mm mm

Brand MITUTOYO
41012375
EAN 4946368438337
Supplier number MITUTOYO 137-202

Frequently asked questions about this product

Answered by specialists

What is the measuring range of this inside micrometer?: With the included extension rods, you can measure internal dimensions from 50 to 300 mm.
What is the graduation of the Mitutoyo 137-202?: The vernier scale features a graduation of 0.01 mm for precise readings.
Which extension rods are included in this set?: The set includes solid extension rods of 13 mm, 25 mm, 50 mm (two pieces), and 100 mm.
What is the travel range of the micrometer head?: The micrometer head itself has an adjustment travel of 13 mm.
What are the main applications for this tubular inside micrometer?: It is designed for measuring inside diameters of cylinders, bores, rings, and parallel surfaces.