Magnet Size for swapping in humbuckers

jaymenon

Can some one tell me please what would be the magnet sizes for swapping purposes?

I would imagine that Gibson, SD, DiMarzio, BK etc would carry imperial size magnets
Would 2.5" x 1/8" x 1/2" be right?

Tonerider, Irongear etc  would be metric?
62mm x 3.2mm x 12.5mm...?
(or)
58mm x 3.2mm x 12.5mm...?

And would they rough cast or polished please?

Funkfingers

jaymenon said:

Gibson, SD, DiMarzio … 2.5" x 1/8" x 1/2"

Affirmative. 

NOTE: When people like Doug & Pat review retro-replica humbuckers, they sometimes talk about long and short bar magnets. This is a whole hair-splitting sub-topic in its own right. My Les Paul forumites start fights over it.

jaymenon said:

would they rough cast or polished please?

Looking at my stash of Alnico bar magnets, all of the examples removed from Gibson or Duncan humbuckers are polished.

Any sand or rough cast I have, I acquired from other sources. Some of these are very rough indeed!

DiMarzio often fastens the magnet to the baseplate with a strong adhesive. 

I have never had the opportunity to dismantle a UK-made humbucker. Hence, I cannot comment on the dimensions of the magnets used in them.