简介
选择错误的螺丝刀刀头，有时意味着维修成功和维修困难之间的区别。遵循本指南中的提示，正确识别你的螺丝刀刀头，防止那些可悲的滑丝。
如果在查看此处的信息后仍然遇到麻烦，请查看这个超棒的指南，了解一些螺丝刀的使用技巧。
你所需要的
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具有前缀“J”和“PH”的位通常被认为是相同的。 不要被他们相似的外表所愚弄 - 他们是完全不同的。
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十字（PH）螺丝设计成使十字螺丝刀凸出，如果施加过大的扭矩。 这样可以防止损坏螺钉和螺丝刀或钻头。
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日本工业标准（J）螺丝不凸出，并有90度角。
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146等其他人完成本指南。
18条评论
Excellent guide. could not figure out the difference by looking.
It would be clearer if the displayed drawing of each bit actually said J-bit or PH-bit, and because both have 90 degree corners, maybe change the J-bit description to “have 90 degree square inside corners“ and include in the PH description “have 90 degree rounded inside corners.
Otherwise, with interpretation, your article helped me.
what size hex shaft do these smaller bits have?. i have an electric precision screw driver, for electronics. i go through the PH1 bits very quickly. i can NOT find them for sale anywhere on earth. does anybody know where to purchase these things?? and/or tell me how i should word the query. all im getting is 1/4 hex shaft results. very frustrating
In the picture on the top of the page the bits with a 90° corner are marked as Phillips heads, the ones with the rounded corners are markes as JIS heads. But it seems to be the other way, as mentioned in Step 3 of this instruction, and also according to other pages like Phillips #000 Screwdriver
Sharp eye, Andreas! Thanks for catching that. We’ve updated the image at the top of the guide with the correct labels.
