Size Measuring

Size Measuring

Korea, Japan, and China all use both inches and centimeters, but mainly the metric system. For example, all 3 countries express the total length of scissors in inches. However, they use centimeters and millimeters for parts and precision manufacturing processes.

A digital caliper with both units is helpful because it measures more accurately and efficiently when you need to replace a bolt or purchase parts for repair.

Scissor factories usually use standard-sized bolts, but it is not unusual to design a customized-size bolt.

0.01mm is a minimal difference; slight errors might occur even when measuring the same part multiple times. The following pictures show you how to measure the length and diameter.

The following pictures show you how to measure the square hole circled by the red line. As you can see in this photo, the actual size is 4.08mm. The standard size is 4.0mm, but the factory made it 0.08mm bigger. The standard size for this square part of the bolt is 4.0mm, but its actual size is 3.95mm.

In general, square holes are made bigger, and bolts are made smaller than their standard size to fit together easily.

This time, let's check the size of the circular hole inside the blade. The standard size is 5.0mm, but the actual size is 5.01mm. The round part under the bolt head is 4.92mm, but it is for a 5.0mm hole.

Let's measure the circular hole outside of the blade. It is 7.09mm, and the bolt head is 6.99mm. The standard size for the hole and the bolt is 7.0mm.