Mitutoyo 511-702 35-60mm Standard Bore Gauge

Technical Overview

High-precision 35-60mm standard bore gauge with 2µm accuracy, carbide contact points, and a thermal-insulated grip to reduce operator heat transfer by 50%.

Key Features

Wide-range measuring capacity of 35mm to 60mm using interchangeable anvils
Exceptional wide-range accuracy of 2 µm and repeatability of 0.5 µm
Thermally-insulated grip reduces hand heat transfer by 50% for high stability
Extremely durable carbide-tipped contact points and anvils resist wear
Includes 6 interchangeable anvils and 4 adjustment spacers (0.5mm thick)
Equipped with a self-centering pendulum guide system for rapid, accurate alignment

Technical Specification Matrix

Parameter	Value
Measuring Range	35 - 60 mm
Accuracy	±2 µm
Repeatability	0.5 µm
Adjacent Error	1 µm
Effective Stroke of Plunger	1.2 mm
Measuring Force	4 N or less
Guide Force	6 N or less
Number of Anvils	6
Number of Spacers	4
Probing Depth	150 mm
Grip Stem Diameter	8 mm
Contact Point Material	Carbide Tipped
Display Type	Requires Dial/Digital Indicator (Not Included)
Physical Weight (kg)	0.23
Dimensions L x W x H (cm)	33.4 x 3.2 x 2

Industrial Applications

1. Automotive Cylinder Bore Metrology

Accurately measuring the internal diameter, taper, and roundness of engine cylinder bores during the honing process. The 35-60mm range perfectly fits small-to-medium light vehicle cylinders, motorcycle cylinders, and industrial pump sleeves.

Problem Solved

Ensures precise clearance between the piston rings and the cylinder wall, preventing compression loss and premature wear. The thermal-insulated grip eliminates measurement drift caused by hand heat transfer during serial inspection.

Cylinder HoningTaper MeasurementOvality DetectionThermal StabilityEngine Block Inspection

2. Precision Hydraulics and Pneumatics Manufacturing

Checking the inner diameter of hydraulic valve sleeves and pneumatic cylinder tubes. These parts require strict tolerances for sealing rings and plunger fits, typically in the 35mm to 60mm range.

Problem Solved

Prevents fluid bypass and system failures by detecting subtle geometric irregularities like hour-glassing or barrel-shaping using the 2-point self-centering guide system.

Valve Sleeve TolerancesHydraulic Cylinder ID2-Point Self-CenteringMicro-Geometric Deviations

3. Heavy Machinery Gearbox and Bearing Seat Inspection

Inspecting high-tolerance bearing housing seats and gearbox shafts before press-fitting bearings. Correct bearing preloads require precise seat bore measurements within a fraction of a millimeter.

Problem Solved

The high repeatability (0.5 µm) and carbide-tipped durability ensure reliable QA checks on cast-iron and hardened steel housings, avoiding bearing spin or overload due to improper fits.

Bearing Housing FitGearbox Assembly QACarbide DurabilityTolerance Verification