- #1
wmingin
- 33
- 0
Hello All!
I read that placing a steel cup on one end of a permanent magnet will increase the "pull" at the opposite end. Having far too much time on my hands, I decided to perform my own test, to see how much the pull is increased. I found a neodymium cylinder magnet, 1 inch diameter and one inch long. I then machined a cup 2" diameter, 1-1/2" long, with a 7/8" deep x 1" diameter hole in one end. This gave me a steel cup with 1/2" wall and 1/2" floor. I attached a small steel rod to the strain gauge and measured the results with a 3/8" air gap steel to magnet. Here are the results...
Magent with no cup: 3lbs / 5oz.
Magnet with cup: 2lbs / 8oz.
The cup seems to have REDUCED the attraction!
What gives?
Cheers!
Bill
I read that placing a steel cup on one end of a permanent magnet will increase the "pull" at the opposite end. Having far too much time on my hands, I decided to perform my own test, to see how much the pull is increased. I found a neodymium cylinder magnet, 1 inch diameter and one inch long. I then machined a cup 2" diameter, 1-1/2" long, with a 7/8" deep x 1" diameter hole in one end. This gave me a steel cup with 1/2" wall and 1/2" floor. I attached a small steel rod to the strain gauge and measured the results with a 3/8" air gap steel to magnet. Here are the results...
Magent with no cup: 3lbs / 5oz.
Magnet with cup: 2lbs / 8oz.
The cup seems to have REDUCED the attraction!
What gives?
Cheers!
Bill