Mitutoyo 511-715-20 Dial Bore Gauge

USD 421.64

High-precision 160-250mm metric dial bore gauge. Features ±2 µm accuracy, 0.01mm resolution, 250mm depth, hollow grip for thermal stability, and carbide tips.

SKU Mitutoyo-511-715-20 Category
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Mitutoyo 511-715-20 Dial Bore Gauge

Model Identifier 511-715-20
Official Part Number 511-715-20
GTIN Standard 603908525844

Technical Overview

High-precision 160-250mm metric dial bore gauge. Features ±2 µm accuracy, 0.01mm resolution, 250mm depth, hollow grip for thermal stability, and carbide tips.

Key Features

  • Measures internal diameters from 160 mm to 250 mm with high accuracy
  • Includes an analog dial indicator (Model 2046AB) with 0.01 mm graduations
  • Hollow-structured thermal insulation grip reduces operator heat transfer by 50%
  • Carbide-tipped contact points and anvils ensure exceptional wear resistance
  • Equipped with a centring bridge for reliable self-centring during measurement
  • Supplied with 6 interchangeable anvils and 7 washers (0.5 mm thick) for precise step adjustment
  • Includes a durable protective cover for the dial indicator and a fitted storage case

Manual mechanical measuring instrument with analog dial indicator, requiring no external power source.

Technical Specification Matrix

ParameterValue
Measuring Range160 - 250 mm
Graduation0.01 mm
Accuracy±2 µm
Repeatability0.5 µm
Indication Stability1 µm
Adjacent Error1 µm
Probing Depth250 mm
Stroke of Contact Point1.6 mm
Number of Anvils6
Number of Washers7
Dial Indicator Model2046AB
Stem Diameter8 mm
Measuring Force6 N or less
Guide Force15 N or less
Physical Weight (kg)0.85
Dimensions L x W x H (cm)42 x 25 x 4

Industrial Applications

1. Heavy Engine Cylinder Block Reboring Quality Control

Used in diesel engine manufacturing or remanufacturing to verify the final bore diameter of cylinder liners (typically ranging from 160 mm to 250 mm) [1.1.3]. The 250 mm probing depth allows full travel down the bore to check for dimensional consistency.

Problem Solved

Detects cylinder taper and out-of-roundness (ovalness) with 2 µm accuracy, preventing piston slap or premature seal failure due to micro-deviations.

Cylinder BoreTaper MeasurementOut-of-RoundnessEngine Remanufacturing

2. Industrial Hydraulic Cylinder ID Verification

Perfect for inspecting the internal diameter of high-pressure hydraulic cylinders. In systems where piston diameters are between 160 mm and 250 mm, the bore gauge measures the tube's ID at various depths up to 250 mm.

Problem Solved

Ensures the internal bore conforms to precise clearance tolerances (within 2 µm limit), preventing hydraulic fluid bypass under extreme pressures and maintaining seal integrity.

Hydraulic CylinderInside Diameter InspectionTolerancingFluid Power Components

3. Large Heavy-Duty Bearing Housing Inspection

Utilized in rotating machinery maintenance (such as turbines or large pumps) to measure the inside diameter of bearing housings and gearbox bores of 160 mm to 250 mm.

Problem Solved

Identifies deformation, wear, or misalignment in the bearing seats. The thermal insulation grip reduces operator heat-transfer errors by 50% during long inspections, ensuring the housing remains within specification.

Bearing HousingID MeasurementThermal Isolation GripRotating Machinery Repair
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