Hi folks,
Any one with electric extractors,what is the highest speed you have,or can get on the extractor.Turns per minute??
Thanks.
You need to match both rpm and radius for this. (And torque while starting up).
I have an 8 frame radial extractor that spins at about 255rpm.
The outer edge of the basket is at 34cm radius so I think that generates about 25g of centrifugal force at full speed.
I'd like to get it a bit closer to 30g (eg 285rpm given I can't practically change the radius) to reduce the time required for extraction.
Anything over 30g I think is likely to result in destroyed frames and comb. foundationless would require lower speeds.
Sent from my SM-N910G using Tapatalk
I have a Mann Lake 18/9 frame extractor. I believe it tops out at 100 rpm. The key to getting it up to 100 rpm is to start off slow and slowly increase the rotations as the honey is extracted.
I was looking at the "Grit" magazine from 2013 which had instructions on how to build an electric motored powered extractor. They recommended a top speed of 200 rpm with a 20 gallon tub.
My home made extractor is made from a 55 gallon plastic barrel and a ceiling fan motor. I estimate the motor will turn the four frames around 400 RPM when dry. When I first built this extractor I used the three speeds that is typical with ceiling fan motors. But after using it for three seasons I found that the weight of the honey naturally starts the spinning slowly and increases as the honey is spun out of the frames so I just run the top speed of the motor from the start.
Along the lines of what chorrylan said here is a chart for ceiling fan motors allowable max speed:
http://www.hansenwholesale.com/ceilingfans/reviews/ceiling-fan-rpms.asp
The largest radius that the frames make in my extractor is 8 3/8 for medium frames. I do not wire my frames. Early on in the development stages it threw a frame and instantly stalled the motor but did not break the frame.