This is a pretty basic bore gauge with what I'd call an average import-quality build. It's the same bore gauge assembly with the same anvils and shim spacers that you'd find in most other import bore gauge sets, but XUNTOP includes their own XUNTOP-branded digital indicator instead of the more common dial indicator.
The bore gauge itself looks and feels good. The clamp grips the stem of the indicator well without needing extreme pressure. The anvils are all decently machined and feature what I assume is a pressed-in hardened ball bearing in the tip. I'll note that what is supposed to be the machined reference surface for the anvils to mate against in the bore gauge was rather rough, and had a fairly significant nick / raised burr along the edge. I've highlighted this defect in an attached photo. I was able to clean up the surface without much trouble, but it really shouldn't have been present in the first place.
The blow-molded case is totally acceptable and holds everything pretty well. I will complain that the case does not fit the bore gauge with the protective indicator cover attached - you must either remove it or disassemble the bore gauge before storing it. The digital indicator itself isn't anything to write home about. It works totally fine, the display is fairly easy to read, but I'm not a fan of the XUNTOP logo and text on the indicator face being annoyingly highly reflective. It's distracting when using the device.
In actual use, the range of the bore gauge is very narrow. The full sweep is only approximately 2mm, so you need to have the bore gauge set up and zeroed within 2mm of your target measurement diameter.
Overall I think it's a good bore gauge for the home shop. The price is fair for the quality you receive. I strongly recommend watching some videos on how to use these types of bore gauges before buying, just to be absolutely sure you know how this type of tool works.
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This item: XUNTOP Digital Bore Gauge Set 2-6inch（50-160mm）Diameters Range Dial Indicator 0.0005 Inch(0.01mm) Accuracy with LCD Display Deep Engine Cylinder Measurement Tool for Machining,CNC,Automotive
$71.24
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$36.00
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$105.00
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XUNTOP Indicator Series
Product Description
Precision 50-160mm Bore Gauge - Essential for Engine Builders & CNC Workshops
Designed for engine builders, automotive technicians and CNC machinists. Performs critical measurements in engine cylinders, turbines, pumps and gearboxes. Ideal for manufacturing plants and heavy equipment workshops handling high-vibration tasks.
0.5"/0.0005" Res Digital Indicator - Core Precision
High-contrast backlight LCD ensures clear visibility in low light. Instant mm/inch conversion eliminates unit errors across standards. Zero-setting function allows recalibration at any position in 1 second - no manual adjustments needed. Reduces operator fatigue during repetitive measurements.
Chrome Handle & All-Metal Lock - Wear-Resistant Grip with Instant Springback
Chrome-plated handle resists corrosion with HRC60+ hardened probe tip. All-metal lock provides instant springback for secure positioning during 150mm deep-bore tasks. Minimizes adjustment time and withstands vibration in automotive/CNC environments.
12 Quick-Change Probes (50-105mm) - Cover Pumps, Turbines & Engine Cylinders
12 hardened probes (50-105mm, 5mm steps): ・50-65mm: Small/mid bores (pumps/gearboxes) ・70-85mm: Heavy spindles ・90-105mm: Large components (turbines/cylinders) ±0.003mm repeatability.
Complete Kit: Digital Indicator + 12 Probes + ABS Case - Workshop Ready
Includes: ・0.5" digital dial indicator ・Measuring rod & accessories ・12 probes: 50/55/60/65/70/75/80/85/90/95/100/105mm ・ABS storage case For engine cylinders, CNC, and automotive manufacturing.
XUNTOP Dial Indicators for Automotive Repair and Mechanical Manufacturing
 2-6" Bore Gauge |  1" Digital Indicator |  1" Digital Indicator Set |  1" Dial Indicator Set |  1" Table Saw Gauge |  0.5" Thickness Gauge | |
|---|---|---|---|---|---|---|
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Customer Reviews
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4
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26
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14
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19
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Indicator Parameter
| 0-0.5 inch/0-12.7mm | 0 -1 inch/0-25.4mm | 0 -1 inch/0-25.4mm | 0 -1 inch | 0 -1 inch/0-25.4mm | 0-0.5inch/0 -12.7mm |
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Accuracy
| 0.0005"/0.01mm | 0.0005 inch/0.01mm | 0.0005 inch/0.01mm | 0.001 inch | 0.0005 inch/0.01mm | 0.0005 inch/0.01 mm |
|
Measuring Range
| 2-6 inch | 0 -1 inch/0-25.4mm | 0 -1 inch/0-25.4mm | 0 -1 inch | 0 -1 inch/0-25.4mm | 0-0.5inch/0 -12.7mm |
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Measuring Depth
| 6 inch | - | - | - | - | - |
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Max Pull
| - | - | 132lbs/60kg | 132lbs/60kg | - | - |
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Clamping Diameter
| - | - | 5/16 inch ( 8mm) | 3/8 inch ( 9.52mm) | - | - |
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Arm/Rod Dimension
| - | - | lower arm 4.74"upper arm 3.35" | lower arm 4.74"upper arm 3.35" | 6.1x0.75x0.37"/7x0.75x0.75" | - |
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Unit Conversion
| ✔ | ✔ | ✔ | ✘ | ✔ | ✔ |
