Mitutoyo 511-705 Bore Gauge

Technical Overview

Precision internal diameter measuring instrument featuring a 160-250mm range, 1.6mm stroke, 2 µm accuracy, and 0.5 µm repeatability with carbide tips.

Key Features

Wide measuring range of 160 to 250 mm using 6 interchangeable anvils and 7 spacers.
Carbide-tipped contact points and anvil tips for exceptional durability and wear resistance.
Hollow-structured, enlarged grip reduces hand heat transfer to the gauge by 50% for thermal stability.
Maintains high-accuracy inside diameter measurement with a wide-range accuracy of 2 µm.
Excellent repeatability of 0.5 µm for reliable, consistent measurements.
Extended plunger stroke of 1.6 mm provides a longer effective measuring range.
Includes a 250 mm probing depth for measuring deep bore profiles.
Compatible with various standard analog or digital dial indicators with an 8mm stem.

Technical Specification Matrix

Parameter	Value
Measuring Range	160 - 250 mm
Probing Depth	250 mm
Plunger Stroke	1.6 mm
Accuracy	2 µm
Repeatability	0.5 µm
Adjacent Error	1 µm
Measuring Force	6 N or less
Guide Force	15 N or less
Number of Anvils	6
Number of Spacers	7
Contact Point Material	Carbide
Grip Type	Hollow heat-shield structure
Stem Diameter	8 mm
Physical Weight (kg)	0.68
Dimensions L x W x H (cm)	37.4 x 0 x 0

Industrial Applications

1. Automotive Engine Cylinder Boring Inspection

Inspect cylinder bore inside diameters (160mm to 250mm) in heavy-duty engines to detect cylinder wear, ovality, and taper. The 2-point contact design precisely measures these geometrical deviations.

Problem Solved

Resolves the issue of engine compression loss caused by out-of-round cylinders by ensuring bore geometry meets strict micrometer-level manufacturing tolerances.

cylinder boringovality measurementbore taperengine manufacturinginside diameter

2. Hydraulic Cylinder Bore Calibration

Verify the internal diameter and finish of large hydraulic cylinder barrels up to 250mm before assembling pistons and seals. The 250mm probing depth allows inspection deep inside the tube.

Problem Solved

Prevents hydraulic fluid bypass and seal degradation by confirming a uniform bore diameter along the entire cylinder length with 0.5 µm repeatability.

hydraulic cylinderbarrel calibrationprobing depthseal clearanceinternal diameter

3. Industrial Bearing Housing Alignment

Measure the diameter and roundness of large bearing housings and press-fit bushing seats in heavy machinery gearboxes.

Problem Solved

Eliminates premature bearing failure due to improper interference fits by providing highly accurate, heat-insulated measurements unaffected by operator hand temperature.

bearing seathousing alignmentpress-fit bushingthermal insulationinterference fit