Description
Product Overview
When you cross into the microscopic realm of sub-3mm machining, standard inspection tools completely fall away. The Mitutoyo 368-001 Holtest is an ultra-specialized 2-Point Internal Micrometer, engineered specifically to measure the true internal diameter of microscopic bores with absolute certainty.
- Extreme Micro Range (2-2.5mm): Covering a painstakingly tight 2.0mm to 2.5mm measuring range, this instrument is the lifeblood of Swiss-turn machinists, watchmakers, medical device manufacturers, and aerospace fluidics engineers.
- 2-Point Contact Design: Like all Mitutoyo internal micrometers under 6mm, this Holtest utilizes a highly specialized 2-point contact system. This unique geometry allows the delicate anvils to physically fit inside tiny bores while ensuring true diametrical alignment.
- 1-Micron Resolution: At this scale, every micron counts. This tool delivers a laboratory-grade 0.001mm resolution, allowing you to hit bearing fits and tight tolerances on microscopic components with zero guesswork.
- Constant Force Ratchet: Inserting measuring anvils into a 2mm hole requires extreme delicacy. The built-in ratchet stop mechanism ensures a uniform, repeatable measuring force is applied to the bore walls, completely removing operator “feel” from the equation and preventing catastrophic damage to the tool or your workpiece.
Condition
Used (Like-New Condition / Complete Full Set).
Finding a micro-Holtest in this condition on the used market is exceptionally rare. It is in phenomenal, like-new condition, showing practically zero signs of use, and has clearly been carefully stored in a clean-room or quality control environment.
- Mechanical Integrity: The thimble rotates with legendary Mitutoyo smoothness, and the micro-anvils extend and retract flawlessly.
- The Complete Setup: It comes safely housed in its original Mitutoyo fitted case, complete with all factory paperwork and the adjustment spanner. Crucially, it includes the matching factory setting ring, allowing you to precisely master the tool to absolute zero before sweeping your parts.
Brand Information
Mitutoyo Corporation (Japan) is the undisputed global benchmark for dimensional metrology. Their “Holtest” internal micrometers are considered the gold standard in the precision machining industry, trusted for their unwavering accuracy and robust mechanical longevity—even when working at microscopic scales.
Specifications
| Feature | Specification |
| Brand | Mitutoyo (Japan) |
| Model | 368-001 |
| Type | 2-Point Internal Micrometer (Holtest) |
| Measuring Range | 2.0mm – 2.5mm |
| Graduation | 0.001mm |
| Measuring Contacts | 2-Point Micro Anvils |
| Included Accessories | Setting Ring, Spanner, Papers, Case |
Keywords
Mitutoyo 368-001, 2-2.5mm Holtest, 2-point internal micrometer, micro bore micrometer, Mitutoyo bore mic, Swiss turn metrology, internal micrometer, machinist measuring tools, Japanese metrology.
