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What component replaces this one in thumbturn locks?

Information about locks themselves. Questions, tips and lock diagram information should be posted here.

What component replaces this one in thumbturn locks?

Postby Senses » 1 Sep 2015 6:58

So I took apart a cylinder with a keyway on both sides to look at how it works. If I understand correctly, when I insert the key, the component below is pushed into the cam so that the key engages the cam. How does this work when using a knob cylinder? I believe that when rotating the knob, the keyway doesn't rotate but when rotating the key, the knob does rotate. So how does this work? One thing I thought of is that the half on the keyside of the component below is slightly longer, so that when the key is inserted, both the cam and knob are engaged, but when the knob is engaged, the keyside isn't. Not sure if this is clear, but could make drawing if necessary. Anyway, this is just how I would expect it to work, but I don't really know so I'm curious how this works with a knob cylinder. Thanks!

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Re: What component replaces this one in thumbturn locks?

Postby femurat » 1 Sep 2015 11:11

It's an euro profile cylinder. The thumb turn has almost the same thing but with a spring that pushes it away from the thumb turn, making it always engaged, unless a key pushes it from the other side.
There are models where turning the key make everything turn, key included.
Cheers :)
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