Mitutoyo 293-234-30 Digital Micrometer

Technical Overview

Digital 0-25mm micrometer with IP65 rating, SPC output, ±1µm accuracy, carbide faces, and constant-force ratchet thimble for precision industrial metrology.

Key Features

IP65-rated protection against dust, water, and cutting oil splashes [1.1.5].
Ratchet thimble constant-force device ensuring reliable, uniform measurements with 7-12 N of force.
Integrated SPC data output function for streamlined statistical process control.
Carbide-tipped, micro-lap finished measuring faces for extreme wear resistance.
Extraordinary battery life of approximately 2.4 years with standard SR44 battery.
Ergonomic anti-slip frame cover and front panel design for stable hand-held measurements.
Zero/ABS absolute measurement sensor system.

Technical Specification Matrix

Parameter	Value
Measuring Range	0 - 25 mm
Accuracy	±1 µm
Resolution	0.001 mm
IP Protection Class	IP65
Measuring Force	7 to 12 N
Constant Force Device	Ratchet Thimble
Flatness	0.3 µm
Parallelism	1 µm
Data Output	Yes (SPC)
Spindle Diameter	6.35 mm
Spindle Pitch	0.5 mm
Battery Type	SR44 (1 pc)
Battery Life	Approx. 2.4 years
Display Type	LCD (7.5 mm character height)
Measuring Face	Carbide-tipped, micro-lap finish
Physical Weight (kg)	0.28
Dimensions L x W x H (cm)	14 x 6.5 x 2.5

Industrial Applications

1. In-Process CNC Machining Quality Control

Used on the machining shop floor to quickly check dimensions of metal components immediately after milling or turning, without having to wipe off all coolant.

Problem Solved

Saves cycle time by enabling measurements directly inside or next to the machine. The IP65 design prevents ingress of cutting oils or metal filings that would destroy standard electronic tools.

IP65 Coolant-ProofSPC Data OutputCNC MachiningMetrology±1µm Accuracy

2. Piston and Valve Stem Tolerance Inspection

Inspecting piston diameters, valve stem thicknesses, or bearing clearances in automotive manufacturing where strict ±1 µm accuracy is demanded.

Problem Solved

Ensures engine components meet precise tolerances for combustion efficiency and lifespan. The ratchet thimble guarantees consistent user force, eliminating operator error during high-throughput manual inspection.

Ratchet ThimbleMicro-Lap FinishTolerance VerificationAutomotive Manufacturing0.001mm Resolution

3. Statistical Process Control Assembly Line Audits

Utilizing the SPC data output port to transmit measurement data instantly to statistical process control software (like MeasurLink) via an interface cable.

Problem Solved

Eliminates manual entry errors and dramatically speeds up quality auditing processes, creating a digital trace of production accuracy.

SPC Data OutputMeasurLinkStatistical Process ControlData LoggingDigital Metrology