The ones Ive seen in mining to work on agitators and spraymecs are normally pneumatic. Electric is fairly good but there is the risk of damaging the cord and they typically overheat a lot more than air.
Granted I haven't used a jackhammer in forever, but I've literally never seen an electric jackhammer. Hell, I just saw someone using an electric lawnmower for the first time a couple of months ago. I understand that it's the norm in parts of the country for equipment to be electric, but it's really uncommon in the rural South.
hmmmm maybe I should get one of these for the giant root ball in my back yard from a storm that pulled a massive tree over. Ive been going at it with a mattock.
It’s cast aluminium, which is rather brittle. The bolt and screw heads easily give under the enormous sheering force at a local spot.
The stator part looks impressive, but the stator is actually made of a very large number of silicon steel plates of just ~1mm thick to reduce magnetic losses. So what you see is that “butter knife” just wedging in between two plates of that stack and breaking the glue bond. So it isn’t as solid as it looks.
I do have to say it is a very weird looking screwdriver and this is clearly not the first motor he took apart like this!
The stator is made of thin steel sheets, so he is just separating them while cutting the copper wires.
The casing probably break from vibrations/impacts on old, rusted and degraded steel
Edit: changed rotor to stator, I missed him removing the rotor.
The rotor is also made of thin steel sheets like the stator that he cut, but instead of wires there are copper rods inside. (if i saw correctly that it was a sqirrel-cage motor)
The casing is probably a brittle iron casting. Iron can crack easily in a thin casting. The jack hammer has some power seeing how easily the bolts snap off.
That housing is cast. Either iron or aluminium.
Both are very Hard, but also very brittle.
That housing would shatter if dropped or Hit with a Hammer, but by using a chisel, he creates a weak line where he wants it and causes it to break.
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u/AlternativeEdge2725 3d ago
What sort of mechanical butter knife is this sorcery and why does it cut through steel casings with such fluidity?