I remember your excellent post and photos about reducing vibration sans noise reduction. Weighted the pulley to reduce up/down vibration.
Would you share some more about balancing the crank?
Thanks. Maybe a bit extreme, but I like the compressor, works great, and fits my application. Because it’s mounted on my lift, vibration noise was really loud.
Took apart the compressor and brought the rotating assembly to a local machine shop that specializes in balancing. They will balance anything that spins.
The crank counter-weight was so out of whack that it would have cost a fortune to drill it out and insert Mallory metal. So they added a a chunk of metal to the pulley. Not ideal since the crank is on the opposite side of the pump from the pulley. It fixed the up/down vibration, and the side to side oscillation is minimal. It made a huge difference.
Here’s a vid of the before and after.
You can really see the vibration reduction in the power cord.
LOL, it reduced so much noise that now you can hear the noise from the motor (hum in the ‘after’ part of the vid)