Mitutoyo 323-250-30 Digimatic Disc Micrometer

USD 485.07

Digital disk micrometer with 0-25mm range, ±4µm accuracy, and 0.001mm resolution. Features IP65 protection, ø20mm disc anvils, and SPC data output.

SKU Mitutoyo-323-250-30 Category
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Mitutoyo 323-250-30 Digimatic Disc Micrometer

Model Identifier 323-250-30
Official Part Number 323-250-30
GTIN Standard 4946368689531

Technical Overview

Digital disk micrometer with 0-25mm range, ±4µm accuracy, and 0.001mm resolution. Features IP65 protection, ø20mm disc anvils, and SPC data output.

Key Features

  • Measures root tangent length of spur and helical gears
  • Thin edge (0.7 mm thickness) fits easily into narrow recesses
  • Ratchet stop mechanism provides constant measuring force (3 to 8 N) for repeatable measurements
  • IP65 protection rating offers high resistance to dust, water, and cutting oil
  • Carbide measuring faces with micro-lap finish reduce wear over time
  • Digital functions include ABS/INC mode, data hold, origin-set, and low-voltage alarm
  • SPC data output interface for real-time measurements tracking and quality control

1x SR44 Battery

Technical Specification Matrix

ParameterValue
Measuring Range0 - 25 mm
Resolution0.001 mm
Accuracy±4 µm
Flatness1 µm
Parallelism4 µm
Anvil Diameter20 mm
Disc Edge Thickness0.7 mm
Measurable Module0.5 - 6
Measuring Force3 - 8 N
IP Protection RatingIP65
Spindle Pitch0.5 mm
Spindle Diameter6.35 mm
Battery Type1x SR44
Battery LifeApprox. 2.4 years
Display TypeLCD (7.5 mm character height)
Physical Weight (kg)0.29
Dimensions L x W x H (cm)19.8 x 10.5 x 3.7

Industrial Applications

1. Gear Root Tangent Length Measurement

In gear manufacturing, measuring the root tangent length of spur or helical gears is critical to verifying the teeth profile and pitch. The thin disc anvils (0.7 mm edge thickness) easily enter the narrow recesses between gear teeth (measurable module 0.5 - 6) to deliver precise contact measurements.

Problem Solved

Standard spherical or flat anvil micrometers cannot reach between gear teeth to measure the root tangent length. The thin disc design enables non-destructive, highly precise (±4 µm accuracy) direct measurements of the teeth profiles on the shop floor.

spur gearhelical gearroot tangent lengthmeasurable moduledisc anvils

2. Precision Machining Inspection under Coolant Exposure

During the machining of precision automotive shafts or slotted components, part inspection must occur immediately on the shop floor where the environment is heavily contaminated with metalworking fluids and cutting coolant.

Problem Solved

High-humidity and oil-heavy environments rapidly damage standard digital metrology tools. This micrometer's IP65 protection rating and robust seal construction prevent ingress of water, cutting oil, and dust, allowing engineers to carry out accurate 0-25mm measurements without risking electronic failure.

IP65 coolant-proofautomotive machiningshop floor inspectioncutting oil resistance

3. Narrow Groove and Rib Thickness Verification

In sheet metal stamping and high-precision electronic enclosure manufacturing, parts often feature narrow grooves, slots, or reinforcement ribs with widths less than 1 mm that must be verified for structural integrity.

Problem Solved

Traditional micrometers are too bulky to fit into narrow recesses. The 0.7 mm thin edge and ø20 mm flat disc anvils slip directly into narrow grooves to perform highly repeatable (3-8 N measuring force) thickness verification.

rib thicknessnarrow groovessheet metal stampingrepeatable forceflatness
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