Insize 3222-150, 3222-300 Tubular Inside Micrometer
The Insize Tubular Inside Micrometer is a precision measuring instrument used to measure the internal diameter of bores, cylinders and large holes beyond the range of a standard inside micrometer. It uses a micrometer head fitted with extension rods to cover a wide range of bore sizes, and is stocked and supplied by SAN Tools across our Dubai, Sharjah and Ajman branches in the UAE.
Key features
- 13mm micrometer head travel — the head itself covers a 13mm span, extended in stages by the supplied rods.
- Extension rod set — supplied with 13mm, 25mm and 50mm extension rods to build up to the required measuring range.
- 0.01mm graduation — fine graduation for precise bore diameter readings.
- Carbide measuring faces — hardened carbide contact points resist wear from repeated use on machined bores.
- Supplied with setting standards — reference setting rings/rods are included to calibrate the instrument before use.
Applications
- Measuring internal bore diameters on cylinders, housings and large machined holes
- Toolroom and QC inspection of bored or reamed components
- General machine shop measurement wherever a standard inside micrometer's range is too short
Specifications
| Brand | Insize |
|---|---|
| Type | Tubular inside micrometer |
| Micrometer head travel | 13mm |
| Extension rods | 13mm, 25mm, 50mm |
| Graduation | 0.01mm |
| Accuracy | (3+n+L/50) micrometer |
| Measuring faces | Carbide |
| Supplied with | Setting standards |
| Sizes / variants available | 3222-150, 3222-300 |
How to choose
- Select the 3222-150 or 3222-300 variant based on the maximum bore diameter you need to measure.
- Build up the extension rods (13mm, 25mm, 50mm) in combination to reach your target measuring length, and always calibrate with the supplied setting standards before use.
- Handle the carbide measuring faces carefully — they resist wear but can chip if dropped or forced into an undersized bore.
Frequently asked questions
How do the extension rods work?
The 13mm micrometer head is combined with the 13mm, 25mm and 50mm extension rods (used alone or stacked) to reach the bore diameter you need to measure, within the instrument's overall range.
Do I need to calibrate it before each use?
Yes — the instrument is supplied with setting standards specifically for this purpose, and checking calibration before a measuring session is standard practice with any inside micrometer.
Is this available from SAN Tools with delivery?
Available from our Dubai, Sharjah and Ajman branches with UAE-wide delivery; request a quote or WhatsApp +971 52 132 7742.
Browse all Insize measuring instruments, or request a quote for the Insize tubular inside micrometer.