[经验]

桶连接器测量技巧

2018-10-30 14:39:30

1391 连接器

在Digi-Key，我们收到许多需要帮助寻找桶形连接器的人的询问，但当被问及内径时，他们不确定并且无法测量它。
这里有一些技巧可以解释普通家居用品的测量结果。
最常见的外径为5.5 mm，两个非常常见的内径（ID）测量值为2.1 mm和2.5 mm。
这些非常接近，几乎不可能用尺子进行精确测量。
因此，如果看不到卡尺，可以使用牙签，笔或测试导线。
牙签通常以2.1mm至2.2mm的直径制造。
如果它插入连接器时贴合，那么ID可能是2.1毫米，而如果它掉出来，那么它是2.5毫米。
圆珠笔的最宽点应在2.25 mm和2.35 mm之间。
如果笔一直适合最宽点，则ID为2.5 mm。
如果它只适合部分方式，那么它可能是2.1毫米。
测试引线探针尖端使用起来有点棘手，因为它们的直径通常为2 mm。
由于它们适合两者，因此您需要确定是否存在明显的间隙使其成为2.5毫米，或几乎没有任何间隙使其成为2.1毫米。
如果所有这些技巧都已用尽且你仍然不确定，建议等到可以使用卡尺。
它们是精确测量的最佳工具，可确保购买正确的零件。
请观看我们的视频进行演示。

以上来自于谷歌翻译

以下为原文

At Digi-Key, we receive many inquiries from people that need help finding barrel connectors, but when asked the inner diameter, they aren’t sure and have no way to measure it. Well here are a couple of tricks to decipher the measurement with common household items.
The most common outer diameter is 5.5 mm with two very common inner diameter (ID) measurements of 2.1 mm and 2.5 mm. These are very close and near impossible to take an accurate measurement with a ruler. So, if there’s not a caliper in sight, a toothpick, pen, or test lead can be used.
Toothpicks are commonly manufactured at a diameter of 2.1 mm to 2.2 mm. If it fits snug when inserted into the connector, then the ID is probably 2.1 mm, whereas if it falls out, then it’s 2.5 mm.
The widest point of a ballpoint pen should be between 2.25 mm and 2.35 mm. If the pen fits all the way to the widest point, the ID is 2.5 mm. If it only fits part way, then it is likely 2.1 mm.
Test lead probe tips are a little tricky to use, because they typically have a diameter of 2 mm. Since they will fit in both, you’ll need to identify if there is a noticeable gap making it 2.5 mm, or hardly any gap at all making it 2.1 mm.
If all of these tricks have been exhausted and you are still unsure, it is recommended to wait until a caliper can be used. They are the best tool for an exact measurement to ensure the proper part is purchased. Please watch our video for a demonstration.