Drill feature?

[mmggdd]

Interesting YouTube video about drill chucks

 

[The Cobbler]

I don't think its about locking the bit in place, more so it's to lock the chuck from loosening when reversing if you rub it against something

 

[Al Borland]

And if you do this, you have to tighten it to loosen it.

 

[mmggdd]

I went and tried it on all my drills

 

[dnschmidt]

This has been a well known fact for many years. I've always done it with my Milwaukee drills. Nothing new here.

 

[Willie Makeit]

This has been a well known fact for many years. I've always done it with my Milwaukee drills. Nothing new here.

because you knew about it doesn't make it "well known" ... pretty sure this "feature" is new to a lot of folks here, i know it was for me & i've been using keyless chucks for, well, ever

 

[GeoBruin]

This is like the sitting or standing while wiping thing. Half the people think it's obvious, the other half have never heard of it, and neither talk about it.

I for one didn't know about it.

 

[turner66]

Seems like a solution in search of a problem?
Not sure what I'm missing. Is it a use of the drill in reverse under heavy load situation?.
For several decades I've not known about this, but I also never wished for it or identified it as a problem for me.

 

[mmggdd]

My m12 drill always loosens up if I dont crank down hard on the chuck if I am drilling into masonry. I'll try this next time.

 

[dnschmidt]

Why this is the way it is can best be explained by a ratchet handle example. These chucks indeed do ratchet, that's the sound you hear when tightening down on them. Imagine the pawl of a ratchet being between the teeth inside of the ratchet. Until the pawl falls into a tooth it's not able to hold. The same is true with these chucks when you back them off one click you're in fact locking them into the ratcheting mechanism.