CuNiFe Magnets

[cermag]

We make loads of Alnico / Ceramic magnets for guys making pickups.

Starting to get asked about threaded magnets (you cant do this with Alnico or Ceramic) but the old stuff was CuNiFe material that you cant get anymore but closest being FeCrCo.

Anybody had experience, is it worth looking into.

Mike

[big_teee]

Magnetic Hold sells threaded Alnico Magnets, but they are pricey.
Mike if you have a price list of your magnets, I can list it like I have the others.
http://music-electronics-forum.com/a...price-2014.pdf
http://music-electronics-forum.com/a...price-list.pdf
T

[Bradley Perry]

I have actually heard that threaded FeCrCo rods have been advertised and sold as AlNiCo 5 in the past. I'm curious if the ones SensMag sells are. They sound good for what I've been doing with them, but they sure are expensive.

[EtLa]

If I remember correctly the reading I've got from a WideRange, in gauss pov, CuNife was close to the AlNiCo III. If that's the case I would go with treaded AlNiCo III.

[big_teee]

If I remember correctly the reading I've got from a WideRange, in gauss pov, CuNife was close to the AlNiCo III. If that's the case I would go with treaded AlNiCo III.

I don't think anyone makes a threaded Alnico 3.
I've only seen the threaded A5s available.
You could probably have them made, but they will be costly.
T

[mr fab]

apparently the reason Leo chose CuNiFe is because alnico magnets could not be machined with a thread, it was too brittle/hard or something like that.

sensmag's threaded magnets are equivalentto alnico 5, but obviously must have some additive, or specific formula so that it could be threaded on a machine

[Lollar Jason]

They are all made of this- if they say its a particular alnico they probably mean its sort of equivalent to that type of alnico
FeCrCo - FeCrCo is one machinable magnets -Sens Magnet Manufacturer

old discussion about it on this forum around 2009

[Bradley Perry]

They are all made of this- if they say its a particular alnico they probably mean its sort of equivalent to that type of alnico
FeCrCo - FeCrCo is one machinable magnets -Sens Magnet Manufacturer

old discussion about it on this forum around 2009

I actually am recording a bunch of clips of different pickup/magnet combos right now, and one of them is going to be a comparison of the threaded rods next to the same size non-threaded A5 rods. So far both the pickups with the same winds are only .01H different in inductance on two pickups I hand-wound to the same specs, and they are showing gauss readings that I typically get from A5 of the same size. I'm very curious if I'll be able to hear a difference beyond the standard deviation of hand winding two pickups to the same specs.

[Tony Bones]

Can you grind alnico? I know you can grind neo magnets; I do it to make tiny magnets for position sensors even tinier. As it happens, I also have a modelmakers lathe set up with what is essentially a Dremel mounted on the tool holder. Maybe for kicks I'll try grinding threads in alnico. It will almost certainly be necessary to remagnetize them afterwords.

[Joe Gwinn]

Can you grind alnico? I know you can grind neo magnets; I do it to make tiny magnets for position sensors even tinier. As it happens, I also have a modelmakers lathe set up with what is essentially a Dremel mounted on the tool holder. Maybe for kicks I'll try grinding threads in alnico. It will almost certainly be necessary to remagnetize them afterwords.

Yes, you can grind alnico, which is a kind of steel. Use aluminum oxide and/or zirconium oxide abrasives. But it will be slow.

Be aware that diamond abrasives will be ruined if used at high speed on any iron-bearing metal.

[Peter Naglitsch]

Sensmag suplies bot "alnico5" and "alnico2" threaded magnets. Så probably a weaker version of FeCrCo labeled as A2. The WRHBs I have made with their "A2" magnets have all sounded great.

[EtLa]

Or just put a spring as a thread over any kind of rod magnet.