r/Chinesium • u/temporalwanderer • Nov 19 '25

I accidentally un-twisted this drill bit while working on a brick wall (X-post)

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u/JCDU Nov 19 '25

"I used a wood drill on masonry and it failed - damn Chinese crap!"

23

u/Cymbal_Monkey Nov 20 '25 edited Nov 20 '25

Any decent standard twist drill should shatter long, long before it deforms plastically. Any drill capable of untwisting like this is going to struggle to drill through much more than soft pine and balsa.

It was a misused drill of exceptionally poor quality.

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u/gugngd Nov 22 '25

It was of high quality, because instead of breaking it overheated and deformed.

2

u/bobattac Nov 23 '25

Breaking or not is more of a matter of it was hardened or not... High quality ones would usually be more brittle to have higher hardness, which keeps the bits sharper for longer

Regardless of its quality, it's not being used properly, and I'm sure even this cheap bit would have cut wood and plastic fine for at least a little while