Geothermal rock drill bit - GIF

Geothermal rock drill bit.

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<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/geothermal_rock_drill_bit.mp4" type="video/mp4">
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Previously:

https://www.homemadetools.net/forum/...060#post157235
https://www.homemadetools.net/forum/...794#post124360
https://www.homemadetools.net/forum/...1250#post74040
https://www.homemadetools.net/forum/...165#post161143
https://www.homemadetools.net/forum/...ound-gif-78165

Where's the bit

Fixed, you should be seeing it now.

Quote:

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Originally Posted by Altair

Geothermal rock drill bit.

<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/geothermal_rock_drill_bit.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>


Previously:

https://www.homemadetools.net/forum/...060#post157235
https://www.homemadetools.net/forum/...794#post124360
https://www.homemadetools.net/forum/...1250#post74040
https://www.homemadetools.net/forum/...165#post161143
https://www.homemadetools.net/forum/...ound-gif-78165

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Ok that is just a standard button bit possibly a Hughes. the guy is rotating the cones to check and see if there are any tight or rough spots, an indicator that the cone bearings are about to fail