Description
Condition
Used (Good).
This mechanical blade micrometer is a used example that has been a reliable workshop tool. While it shows cosmetic signs of previous use and handling, it remains mechanically sound and accurate. The spindle movement is smooth, and the measuring faces meet correctly. It is supplied in its original fitted plastic case, complete with the adjustment spanner.
Product Overview
The Mitutoyo 122-101 is a specialised “Blade” micrometer designed to measure features that are inaccessible to standard flat-anvil instruments. The anvil and spindle are shaped into thin, non-rotating blades (0.75mm thickness), allowing them to slip into narrow grooves, keyways, and O-ring slots to measure the inside diameter or width of the feature. Because the blade does not rotate as the thimble is turned, there is no torque applied to the workpiece surface, which prevents slipping or marring of delicate parts. This model features a measuring range of 0 to 25mm and includes a ratchet stop mechanism for consistent measuring force.
Brand Information
Mitutoyo Corporation is the world’s leading manufacturer of precision measuring instruments, established in Japan in 1934. The 122 Series blade micrometers are widely regarded as the industry standard for groove measurement. Mitutoyo is renowned for the hardness of its measuring faces and the precision of its thread grinding, ensuring that specialised tools like this retain their accuracy even after years of service in demanding machining environments.
Specifications
| Feature | Specification |
| Model | 122-101 |
| Measuring Range | 0 – 25mm |
| Graduation | 0.01mm |
| Accuracy | ±3µm |
| Blade Thickness | 0.75mm |
| Spindle Type | Non-rotating |
| Mechanism | Ratchet Stop |
| Included | Plastic Case, Spanner |
Keywords
Mitutoyo, 122-101, blade micrometer, groove micrometer, non-rotating spindle, keyway measurement, 0-25mm micrometer, mechanical micrometer, Japanese metrology, machinist tools.
