What is the purpose of the ball? Why would you use it or not?

I use the ball on surfaces that are not flat like gauging tubing wall thickness a task that can be tricky otherwise.

What is the diameter of the shaft? I want to use this for measuring valve shims, they' sit on top of the valve stim

The diameter of the shaft on this tool is 0.255 inch , or 6.5 mm.

Would tool be suitable to measure the thickness of plastic film? The plastic is approximately5.5 millimeters thick?

The thickness of 5.5 mm is a little less than 1/4" so this tool should be perfectly fine for measuring the plastic.

Is this tool good for engine rebuilding? Such as checking crankshaft journals etc? Would you use the ball for measuring rounded parts like the crank?

This tool is 0 - 1 inch capacity. Crankshaft journals are much larger unless you are referring to lawnmower or similar small engines. I have seen good accuracy and repeatability with the one I bought. The ball is used to measure surfaces with a concave curve such as the inside wall of a piece of tubing or cylindrical shape.

Digital Micrometer w Data Output 0-1"/0.00005"/0.001mm Double Ball

产品编号: 28904045

细节

Brand
iGaging
Material
Stainless
Measurement Accuracy
‎+/-0.001
Number of Batteries
1 CR2032
UPC
743167983136

📏0-1" / 0-25mm range

🔌USB SPC data output

⚙️±0.00016" accuracy

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NT$4267

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描述

📐 Measure like a pro, data-driven and flawless every time!

DUAL MODE MASTERY - Seamlessly switch between Metric and Standard modes to suit any project or preference.
PRECISION AT ITS PEAK - Achieve ultra-fine measurements with ±0.00016" accuracy—because details matter.
DATA DRIVEN EFFICIENCY - Direct USB SPC output lets you integrate measurements effortlessly into your workflow.
BUILT TO LAST PERFORM - Hardened carbide spindle and anvil deliver durability and consistent accuracy, backed by a protective case and accessories.
INNOVATIVE DOUBLE BALL DESIGN - Spherical anvils ensure flawless contact for precise wall thickness readings inside curves.

The iGaging Digital Micrometer offers professional-grade precision with a 0-1" (0-25mm) range and ±0.00016" accuracy. Featuring dual metric/standard modes, a unique double ball anvil design for accurate wall thickness measurement, and USB SPC data output, it’s engineered for durability and seamless data integration—perfect for meticulous professionals who demand flawless results.

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