Allstar Magnetic - anyone else getting bad batches?

[WolfeMacleod]

Just as the title said. Anyone else getting bad batches of magnets from Allstar lately?
This makes two orders in a row with very large percentage of bar magnets who's poles are not 90 degrees. We're talking pretty wonky. Out of 1000 magnets, almost half have been bad.

[David King]

What has Rob had to say about it? I have a few I got through them about 8 years ago that I still have in the drawer. I wouldn't even know how to test for mis-alligned poles.
Have you ever tried Antaida? I'm about to order from them. They certainly keep after me on a regular basis so I'm assuming they want pickup maker business..

[WolfeMacleod]

I've been speaking with Mike Blow about it, and he says they're within a +/- 5 thou tolerance. Problem is, how do you measure a thousands tolerances on an angle? They don't want to RMA these for me, and they wouldn't let us RMA the bad ones from the last batch when we discovered them, stating we only had 14 days from when we got the order... would have been nice to know that beforehand. So we're stuck with a buttload of bad magnets from the previous batch.
He asked what I though was "fair" and I told him I was sending them back, period. He didn't like that.

[John_H]

Are you talking about how the edges of the bar's are machined? Five thou. is a bunch across an eighth of an inch.

[WolfeMacleod]

Are you talking about how the edges of the bar's are machined? Five thou. is a bunch across an eighth of an inch.

Yes, they're not machined at a 90 degree angle. More like 85 degrees or some crap.

[David King]

A-hah, I totally misunderstood, I thought you were saying that the magnetic alignment was off axis from casting. They probably grind them on a big blanchard surface grinder which pushed them over slightly. Someone could grind them straight on one edge to make them useable but you'd lose .005" of width. Not the end of the world.

[John_H]

I was confused also. I thought he was talking about orientation of the magnetic flux at first. The .005 tolerance that they listed probably only meant for the L, W, and H. The edges that aren't square have to be a big flaw in the machining process.

[WolfeMacleod]

Just an update on this...

Allstar wants to charge me $139 fir a restocking fee on the bad parts I received.

Allstar has been sent a link to this thread.

Anyone have anything to say to them?

Now that I have Photoshop reinstalled, I can post re-sized pictures...

[the great waldo]

Thats pretty sloppy grinding. If they cost 50 cents a piece that would be ok otherwise ? After all these are supposed to be ground and not just rough cast. Somethings not right with their grinding set up. 90 degrees is is a fairly basic rule in engineering.

Cheers

Andrew

[Jazz P Bass]

Those edges appear to be sheared, not ground.

The tops look ground.

[jack briggs]

Those edges appear to be sheared, not ground.

The tops look ground.

I don't think you can shear alnico - to brittle

[Jazz P Bass]

Hmmm. I did not consider that.

In any event, they certainly do not look 'machined'.

[David King]

It's up to them to regrind. They aren't quite as bad as I had imagined from your description.
Small claims court? BBB?

Silly question: Is there an audible difference?

[jonson]

I may be wrong but looks like they were cast as one long block and then sliced off with a wet grinder setup and the block was tilted.. So top face and bottom faces ground which become the pole faces then just sliced off like bread, Badly..

[big_teee]

It's up to them to regrind. They aren't quite as bad as I had imagined from your description.
Small claims court? BBB?

Silly question: Is there an audible difference?

I too was wondering if this is cosmetic only, or do they sound Like Sh!@ ???
If they sound OK, throw a big sale with slanted magnets!
T