Mitutoyo 511-725-20 Metric Dial Bore Gauge Set

USD 480.60

Metric dial bore gage with a 160–250mm range, 0.001mm graduation, 250mm probing depth, and carbide-tipped contact points for high-precision ID measurements.

SKU Mitutoyo-511-725-20 Category
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Mitutoyo 511-725-20 Metric Dial Bore Gauge Set

Model Identifier 511-725-20
Official Part Number 511-725-20
GTIN Standard 4946368854984

Technical Overview

Metric dial bore gage with a 160–250mm range, 0.001mm graduation, 250mm probing depth, and carbide-tipped contact points for high-precision ID measurements.

Key Features

  • Broad measuring range from 160mm to 250mm using 6 interchangeable anvils
  • High precision resolution of 0.001mm with an accuracy of ±2 µm
  • Advanced hollow grip design reduces thermal transfer from operator by 50%
  • Pendulum guide structure enables automatic self-centering in the bore
  • Carbide-tipped contact points ensure high durability and long-term wear resistance
  • Includes dial indicator model 2109AB-10 and protective dial cover (21DZA000)
  • Supports optional extension rods for measuring deep bores without loss of accuracy

Mechanical (No power source required)

Technical Specification Matrix

ParameterValue
Measuring Range160 - 250 mm
Graduation0.001 mm
Accuracy± 2 µm
Repeatability0.5 µm
Probing Depth250 mm
Stroke of Contact Point1.6 mm
Measuring Force6 N or less
Guide Force15 N or less
Stem Diameter8 mm
Number of Anvils6
Number of Spacers/Washers7
Contact Point MaterialCarbide Tipped
Dial Indicator Model2109AB-10
Physical Weight (kg)0.85
Dimensions L x W x H (cm)45.4 x 16 x 5.7

Industrial Applications

1. Industrial Cylinder Liner Boring & Rebuilding

Used in automotive, marine, and heavy-machinery engine rebuilding shops to verify inside diameters of engine cylinder liners and blocks. Ensures machined cylinders are within precise engineering tolerances.

Problem Solved

Accurately detects structural geometry deviations such as taper, out-of-roundness, and ovality down to 0.5 µm repeatability, preventing piston seal failures.

Cylinder BoringTaper DetectionOut-of-RoundnessEngine Block Machining

2. Hydraulic Cylinder Seal Wear & Bore Inspection

Allows maintenance engineers to measure the internal diameter consistency of mid-sized hydraulic cylinder tubes during routine inspection or rebuilding cycles.

Problem Solved

Provides a 250mm standard probing depth to inspect deeper internal bore walls where linear seal wear is most aggressive, identifying localized barrel deformation.

Hydraulic CylinderSeal Wear AnalysisInternal Diameter ToleranceProbing Depth

3. Heavy-Duty Rotary Pump & Compressor Housing Inspection

Measures rotor housing internal cavities (160-250mm) in high-stress pumping and compression systems to maintain optimal clearances between rotors and casing.

Problem Solved

The hollow-structured thermal-insulating grip mitigates operator hand heat transfer by 50%, eliminating measurement drift caused by thermal expansion during prolonged metrology tasks.

Pump Housing MetrologyRotor ClearanceThermal Transfer MitigationPrecision Casing Alignments
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