Description
Condition
Used (Tool Only / Working).
This digital 3-point bore micrometer is in used, working condition. Important: This listing is for the bare tool only; it does not include the plastic storage case, adjustment spanner, or the 25mm setting ring required for calibration. The electronics are functional with a clear LCD display, and the ratchet mechanism operates smoothly. The contact points show signs of normal workshop use but are free of significant damage. Because the setting ring is missing, the buyer will need access to a 25mm master ring gauge to set the zero point before use.
Product Overview
The Mitutoyo Digimatic Holtest (Series 468) is the industry-standard tool for measuring internal diameters with speed and precision. This specific model covers the 20mm to 25mm range. Unlike 2-point calipers, the 3-point design is self-centring—the three anvils expand radially to automatically align the tool with the axis of the bore, ensuring a true diameter measurement every time.
The instrument features Titanium-coated contact points, which provide exceptional durability and impact resistance compared to standard carbide, ensuring the tool maintains its accuracy even after measuring abrasive materials. It utilises a constant-force Ratchet Stop in the thimble, which eliminates operator error by applying the exact same pressure for every measurement. The large LCD readout offers 0.001mm resolution, making it easy to detect ovality or taper in machined bores.+1
Brand Information
Mitutoyo Corporation (est. 1934) is the global leader in precision measurement. The Series 468 Holtest is widely regarded as the ultimate internal micrometer, combining the robust mechanical design of the classic Holtest with absolute encoder technology. It is a staple in automotive engine building and aerospace manufacturing.
Specifications
| Feature | Specification |
| Likely Model | 468-166 (HTD-25R) |
| Measuring Range | 20mm – 25mm |
| Resolution | 0.001mm (1µm) |
| Accuracy | ±3µm |
| Contact Points | Titanium Coated (3-Point) |
| Display | LCD Digimatic |
| Protection | IP65 (Coolant Proof) |
| Included | Holtest Only (No Ring/Case) |
Keywords
Mitutoyo, 468-166, HTD-25R, digital holtest, 20-25mm bore mic, 3-point micrometer, internal micrometer, titanium anvils, blind hole micrometer, precision measurement.
