Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
lawnmower motor magnet broken
After investigating a scraping noise, I found about 10% of one of the 2
halves of the magnet broken off. Removed and cleaned it up and it runs ok except there seems to be a little vibration. I assume the field is not balanced? What kind of glue/epoxy would work to reattach the magnet? |
#2
Posted to sci.electronics.repair
|
|||
|
|||
lawnmower motor magnet broken
On Fri, 6 Jul 2012 05:01:31 +0000 (UTC), mark
wrote: After investigating a scraping noise, I found about 10% of one of the 2 halves of the magnet broken off. Removed and cleaned it up and it runs ok except there seems to be a little vibration. I assume the field is not balanced? What kind of glue/epoxy would work to reattach the magnet? http://www.kjmagnetics.com/blog.asp?p=sticky-business-how-to-glue-neodymum-magnets I had a similar failure on a PM motor. The problem was that I could not tolerate much of a gap on the glue line. So, I cleaned both sides of the break with a brass wire brush and alcohol to be sure there was no loose debris. I used high strength epoxy and clamped both halves under as much pressure as possible using two pieces of wood and some glue clamps. Despite all this, I still had to sandpaper the PM motor ends to recover my clearances. 4 years later, it's still running. Good luck. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#3
Posted to sci.electronics.repair
|
|||
|
|||
lawnmower motor magnet broken
On Jul 5, 10:01*pm, mark wrote:
After investigating a scraping noise, I found about 10% of one of the 2 halves of the magnet broken off. Removed and cleaned it up and it runs ok except there seems to be a little vibration. I assume the field is not balanced? What kind of glue/epoxy would work to reattach the magnet? Maybe you are confusing cause and effect. Perhaps the vibration caused the magnet breakage. But to answer your question: Loctite 334 Structural Adhesive, High Performance, is designed as a magnet adhesive. But you probably will have gaps as you glue the broken pieces back in place, so use a good, non-instant epoxy. But recall that like poles repel each other, so the piece you replace will want to jump out. You will have to fixture it properly to keep it in place. |
#4
Posted to sci.electronics.repair
|
|||
|
|||
lawnmower motor magnet broken
Used Araldite and made a wooden dowel to clamp it - works great!
Thanks |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Lawnmower engine clutch broken | UK diy | |||
Broken motor bush. | UK diy | |||
Homemade motor from tin-can, nail, and magnet wire | Electronics Repair | |||
Replacing motor oil in your lawnmower? | Home Ownership |