Description
Product Overview
The Mitutoyo 368-901 is a premium 3-Point Internal Micrometer Set (Holtest), engineered to deliver absolute precision when measuring the true internal diameter of small machined bores and cylinders.
- The 3-Point Advantage: This set covers the critical size range where Mitutoyo’s legendary 3-point self-centering design begins. Unlike 2-point gauges that require delicate sweeping, these Holtests feature three contact points that extend simultaneously. This instantly and automatically aligns the tool dead-center within the bore for a flawless, highly repeatable measurement.
- Comprehensive 6-12mm Coverage: This complete kit covers the essential 6mm to 12mm size bracket, utilizing three separate micrometer heads: 6-8mm, 8-10mm, and 10-12mm. It is the perfect arsenal for high-precision automotive, aerospace, and general CNC job shops.
- Deep Bore Capable: Need to measure deep inside a sleeve or past a counterbore? This set includes the factory extension rod, allowing you to seamlessly reach deep internal features while keeping the thimble easily accessible.
- Titanium-Coated Pins: The measuring anvils feature Mitutoyo’s signature titanium coating, providing incredible durability and wear resistance against abrasive materials.
- Constant Force Ratchet: The built-in ratchet stop ensures a uniform measuring force is applied to the bore walls every single time, completely removing operator “feel” from the equation for strict 0.001mm accuracy.
Condition
Used (Great Condition / Complete Set in Case).
These high-precision internal micrometers are in great, ready-to-use condition. They have been well cared for in a professional environment and remain perfectly accurate.
- Mechanical Integrity: The thimbles rotate with legendary Mitutoyo smoothness, and the delicate 3-point anvils extend and retract flawlessly without sticking.
- Complete Setup: This is a fully comprehensive kit. It comes safely housed in its original Mitutoyo fitted case, complete with all factory paperwork. It includes all three micrometer heads, the deep-bore extension rod, the adjustment spanner, the Allen key, and the two factory setting rings required to master all three tools to absolute zero before inspecting your parts.
Brand Information
3Mitutoyo Corporation (Japan) is the undisputed global benchmark for dimensional metrology. Their “Holtest” 3-point internal micrometers are considered the absolute gold standard in the machining industry, trusted for their unwavering accuracy, self-centering speed, and robust mechanical longevity.
Specifications
| Feature | Specification |
| Brand | Mitutoyo (Japan) |
| Model | 368-901 |
| Type | 3-Point Internal Micrometer (Holtest) Set |
| Total Measuring Range | 6mm – 12mm |
| Included Micrometers | 6-8mm, 8-10mm, & 10-12mm |
| Graduation | 0.001mm |
| Measuring Contacts | Titanium Coated (3-Point) |
| Included Accessories | 2x Setting Rings, Extension Rod, Spanner, Allen Key, Papers, Case |
Keywords
Mitutoyo 368-901, 6-12mm Holtest, 3-point internal micrometer, bore micrometer, Mitutoyo bore mic, 6-8mm micrometer, 8-10mm micrometer, 10-12mm micrometer, machinist measuring tools, Japanese metrology.
