6-8 mm (0.23" - 0.31") 3 Point Inside Micrometer

4.6 out of 5 based on 3 reviews | Write a review

$317.06

Inside micrometer for sale online. It is a 3 point internal micrometer, suitable for the precision measurement of blind holes and through holes. 6~8 mm (0.23"~0.31") internal micrometers with a 150 mm extension rod, highly durable carbide-tipped measuring surface, clear scale, and accurate reading.

SKU: ATO-IM-68

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Delivery date: 6-12 days

Overview

Buy a 3 point inside micrometer online. The provided internal micrometer with equipped with a 150 mm extension rod, 6~8 mm (0.23 to 0.31 inch) measuring range and 0.005 mm resolution, ideal for the precision measurement of blind holes and through holes.

Features

Inside micrometer is suitable for the precision measurement of blind holes and through holes.
3 point inside micrometer is equipped with a 150 mm extension rod, which can measure the size of deep holes easily and conveniently.
Clear graduations laser-etched on a satin chrome finish for easy reading. Highly durable because of carbide-tipped measuring surfaces. Spindle hardened ground and lapped for ultimate accuracy.
6~8 mm internal micrometer built-in force limiter ensures accurate and repeatable readings.

Specifications

Model: ATO-SHAN-68
Range: 6~8 mm
Types: 3 Point Inside Micrometer
Material: Bearing Steel
Measurement Type: Internal Diameter Measurement
Resolution: 0.005 mm
Extension Rod Length: 150 mm
Scale Process: Laser Scale
Accuracy: 0.004/0.005 mm
Package: Plastic Box

Details

Inside micrometer details

Applications

The inside micrometer is an instrument for the accurate linear measurement of the diameter, thickness, length and other dimensions of solids. 3 point internal micrometer is mainly used to measure internal dimensions such as the internal diameter of a hole or a tube and is widely used in mechanical engineering, machining and most mechanical industries.

Inside micrometer applications

Tips: Maintainance of the Inside Micrometer

Please check whether the zero line of the inside micrometer is accurate.
When measuring, the measured surface of the workpiece should be wiped clean.
When the workpiece is large, it should be measured on a V-shaped iron or a flat plate.
Before using an internal micrometer to measure, the measuring rod and anvil need to be wiped clean.
Do not loosen the back cover to avoid changing the zero line.
Do not add ordinary engine oil between the fixed sleeve and the movable sleeve.
After using the 3-point inside micrometer, wipe it clean and oil it, put it in a special box and put it in a dry place.

Existing reviews of 6-8 mm (0.23" - 0.31") 3 Point Inside Micrometer

Very accurate and durable Micrometer

Absolutely impressed with this three-point inside micrometer. It delivers incredibly precise 0.005mm resolution readings for bore and hole measurements. The laser markings are crystal clear, and the carbide-tipped ends feel extremely robust. The included extension rod makes deep hole measuring effortless.

From: Smith | Date: 30/04/2026

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A great tool

This inside micrometer has been really helpful for my hole measuring work. The 6–8 mm range is practical, the laser-etched scale is clear and easy to read. It feels solid, gives stable and accurate readings.

From: Kyle | Date: 23/02/2026

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Outstanding performance

This 6-8mm (0.23" - 0.31") 3 point inside micrometer is excellent! It measures with impressive accuracy and is easy to use for both small and large diameters. This micrometer is durable and reliable and is definitely my first choice for measuring tools.

From: william Taylor | Date: 10/09/2023

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