Mitutoyo 511-724-20 Metric Dial Bore Gauge

Technical Overview

Metric dial bore gage set with 100-160mm range, 0.001mm resolution, ±2µm accuracy, 150mm depth, hollow thermal grip, and carbide-tipped contacts.

Key Features

Wide measuring range of 100 mm to 160 mm for versatile internal diameter inspections.
Outstanding metrology with 0.001 mm resolution, ±2 µm accuracy, and 0.5 µm repeatability.
Hollow-structured, enlarged thermal grip reduces hand-to-gage heat transfer by 50% to maintain measurement stability.
Highly durable carbide-tipped contact points and anvils ensure superior wear resistance over steel components.
Integrated centring bridge allows for automatic, precise self-centring during entry.
Comes as a comprehensive kit with a high-precision Mitutoyo 2109AB-10 dial indicator, 13 anvils, and 4 spacers.

Technical Specification Matrix

Parameter	Value
Measuring Range	100 - 160 mm
Graduation	0.001 mm
Accuracy	±2 µm
Repeatability	0.5 µm
Adjacent Error	1 µm
Measuring Depth	150 mm
Plunger Stroke	1.6 mm
Measuring Force	5 N or less
Guide Force	10 N or less
Dial Indicator Model	2109AB-10
Number of Anvils	13
Number of Spacers	4
Anvil/Contact Material	Carbide
Physical Weight (kg)	0.48
Dimensions L x W x H (cm)	35 x 10 x 5

Industrial Applications

1. Automotive Engine Block Cylinder Boring & Honing Inspection

Used in automotive machine shops to measure engine cylinder liners and block bores within the 100-160 mm diameter range. Operators use the tool to check for cylinder taper and out-of-roundness across the full 150 mm depth.

Problem Solved

Ensures boring and honing processes meet strict OEM specifications. The self-centring bridge eliminates alignment errors, while the 0.5 µm repeatability detects micro-ovality that could cause piston ring failure.

Cylinder HoningTaperOvalityOut-of-RoundnessEngine Rebuilding

2. Hydraulic Cylinder Barrel Manufacturing Quality Control

Applied in the production of medium-duty hydraulic cylinders to verify that the internal diameter of the cylinder tube conforms to exact clearance tolerances before piston seal installation.

Problem Solved

Prevents high-pressure fluid bypass and premature seal wear. The gage's carbide-tipped contacts resist abrasion from honed steel tubes, maintaining a stable ±2 µm accuracy throughout high-volume batch inspection.

Hydraulic CylinderInternal Diameter ToleranceSeal ClearanceSurface Honing

3. Heavy Duty Bearing Housing Seat Precision Alignment

Deployed in heavy machinery manufacturing to inspect large roller or ball bearing housing bore seats (100-160 mm ID) for size and roundness variations.

Problem Solved

Avoids bearing housing misalignment and uneven loading, which leads to catastrophic rotating equipment failure. The hollow-grip thermal insulation keeps the measurement accurate at 0.001 mm resolution, even when handled constantly by operators.

Bearing SeatHousing AlignmentThermal InsulationInterchangeable Anvils