Description
Condition
Used (Tool Only / Working).
This digital 3-point bore micrometer is in used, working condition. Important: This unit is sold as the “tool only” and does not include the plastic storage case or a 8-10mm setting ring. The electronics function correctly, the ratchet stop provides consistent pressure, and the three anvils expand and retract smoothly. The measuring faces show signs of normal use but are free from chips or major damage. Because the setting ring is missing, the buyer will need to access a master ring gauge (or a calibrated standard) to set the “Origin” point before measuring critical tolerances.
Product Overview
The Mitutoyo Digimatic Holtest (Series 468) is a high-precision, three-point internal micrometer designed to measure the 8mm to 10mm range with a resolution of 0.001mm. Unlike 2-point callipers which can rock inside a bore, the 3-point design is self-centring, meaning it automatically aligns itself with the true axis of the hole for a stable and repeatable reading.
This digital model features a large LCD that eliminates reading errors common with vernier scales. It utilises Mitutoyo’s Ratchet Stop mechanism in the thimble, which ensures a constant measuring force regardless of the operator, preventing the anvils from being over-tightened against the bore wall. The contact points are hardened (often Titanium Nitride coated on these models) to resist wear.+2
Brand Information
Mitutoyo Corporation (est. 1934) is the global leader in dimensional metrology. The Holtest is their flagship internal measuring tool, trusted in aerospace and automotive industries for its reliability. The Digimatic series combines the mechanical robustness of the original Holtest with absolute encoder technology, ensuring that even if the spindle is moved quickly, the position is never lost.
Specifications
| Feature | Specification |
| Likely Model | 468-162 (HTD-10R) |
| Measuring Range | 8mm – 10mm |
| Resolution | 0.001mm (1µm) |
| Accuracy | ±2µm |
| Contact Points | 3-Point (Self-Centring) |
| Display | LCD Digimatic |
| Battery | SR44 |
| Included | Holtest Only (No Ring/Case) |
Keywords
Mitutoyo, 468-162, Digital Holtest, 8-10mm bore mic, 3-point micrometer, internal micrometer, blind hole micrometer, HTD-10R, Digimatic, precision measurement.
