Description
Condition
Used (Tool Only / Tested & Accurate).
This digital blade micrometer is in good used condition and perfect working order. It has been tested and found to be both accurate and repeatable. Please Note: This listing is for the micrometer only; it does not include a storage case or adjustment spanner. The non-rotating spindle moves smoothly, and the blade tips are free from major damage, making it ready for immediate service measuring narrow grooves or keyways.
Product Overview
The Mitutoyo 422-230-30 (Series 422) is a specialized “Blade Type” micrometer designed for measuring features that standard round anvils cannot reach. The measuring faces are hardened steel blades, ground to a thickness of 0.75mm, allowing them to slip into narrow grooves, keyways, and other recessed features to measure groove diameters or widths.
This Digimatic model features a measuring range of 0-25mm with a high resolution of 0.001mm (1 micron). A critical feature is the Non-Rotating Spindle—the blade anvils advance linearly without turning. This is essential because a rotating blade would slip out of the groove or scratch the workpiece. It is rated IP65 Coolant Proof, meaning the electronics are sealed against oil, water, and dust, making it suitable for use right on the machining center. It also features SPC data output for process control applications.+2
Brand Information
Mitutoyo Corporation (est. 1934) is the global leader in dimensional metrology. The Series 422 Blade Micrometers are indispensable for turning and milling operations where O-ring grooves or retaining ring slots need to be verified. The “Quick Drive” thimble on this model allows for rapid adjustment, and the carbide-tipped blades (on some variations, though often hardened steel on standard ones) ensure long life even when measuring abrasive cast iron or steel.
Specifications
| Feature | Specification |
| Model | 422-230-30 (BLM-25MX) |
| Measuring Range | 0 – 25mm |
| Resolution | 0.001mm |
| Accuracy | ±3µm |
| Anvil Type | Blade (0.75mm thick) |
| Spindle | Non-Rotating |
| Protection | IP65 (Coolant Proof) |
| Data Output | Yes (SPC) |
| Included | Micrometer Only (No Case) |
Keywords
Mitutoyo, 422-230-30, blade micrometer, groove micrometer, keyway micrometer, non-rotating spindle, 0-25mm mic, IP65 micrometer, BLM-25MX, machinist tools.
