Drilling a magnet.

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lilman

lilman

New Member
Posts
862
Hi all,
Not sure if this is in the right place? :confused: I found a very very strong magnet at work the other day. Bout the right size for extracting bits of broken half shaft. Now I want to attach it to a piece of dowel but not sure I would trust just gluing it. Can a magnet be drilled through? Would it affect the magnetism?
Yours
Thick twunt.:)
 
You can but they do shatter easily, why not just make a secure cage or enclosure for it eg stick it in a steel pipe.
 
should imagine it to be quite hard, so a top quality drill bit to be used, not your average joe bloggs drill bit.
I`d suggest doing it i a drill stand with magnet clamped or held secure in clamped vice, and using plenty of cutting fluid/oil to help cool the cutting tip of drill bit, not a fast speed and steady pressure on it.
even trying a smaller pilot hole first depending on your desired hole size.
over the years I have machined some very very hard materials used in just about every engineering principle, but never drilled a magnet.

Am I right in thinking magnet material is crushed together in huge forces to make the desired shapes ??
then normally ground to finish/required size ??
 
Jam1 said:
You can but they do shatter easily, why not just make a secure cage or enclosure for it eg stick it in a steel pipe.
Click to expand...
Would the steel pipe not "drain" the magnet? Aluminium would work in that case.
 
lilman said:
Hi all,
Not sure if this is in the right place? :confused: I found a very very strong magnet at work the other day. Bout the right size for extracting bits of broken half shaft. Now I want to attach it to a piece of dowel but not sure I would trust just gluing it. Can a magnet be drilled through? Would it affect the magnetism?
Yours
Thick twunt.:)
Click to expand...
The problem isn't with losing the magnetism, it is with the magnet itself. Almost all permanent magnets are made from Ferrometals, and Ferrometals are generally extremely hard, much harder than steel drill bits, so something like a Diamond or Cobalt bit is needed. The other problem is the swarf. This tends to stick to the magnet and the drill bit tip, preventing it from biting into the magnet efficiently.
 
easye1 said:
should imagine it to be quite hard, so a top quality drill bit to be used, not your average joe bloggs drill bit.
I`d suggest doing it i a drill stand with magnet clamped or held secure in clamped vice, and using plenty of cutting fluid/oil to help cool the cutting tip of drill bit, not a fast speed and steady pressure on it.
even trying a smaller pilot hole first depending on your desired hole size.
over the years I have machined some very very hard materials used in just about every engineering principle, but never drilled a magnet.

Am I right in thinking magnet material is crushed together in huge forces to make the desired shapes ??
then normally ground to finish/required size ??
Click to expand...
The idea of drilling it was just to get a screw through it and into a dowel so a 3mm hole would be plenty. Maybe ill have a practice on an old speaker magnet first to see how it goes.
 
problem is, with a magnet on a stick, as you put it into the axle it magnetises itself to the inner axle, making it nigh on impossible to get it onto the broken shaft
 
johnlad said:
problem is, with a magnet on a stick, as you put it into the axle it magnetises itself to the inner axle, making it nigh on impossible to get it onto the broken shaft
Click to expand...
This a pretty strong magnet so maybe glued into a piece of ally pipe will stop it sticking too much inside the axle.
 
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