Look through posts here on motor conversion, there is a lot of useful information.
If this is 2 pole and the magnets are at 180 deg they will actually attract rather than repel, but if you need to make each pole from multiple magnets then you will have strong repulsion to deal with and it needs some ingenuity to hold things in place while the glue sets. Some use magnetic shunts to direct the flux elsewhere to reduce the repulsion while others use brute force and clamps.
You also need to consider holding the magnets on long term with the centrifugal force trying to throw them off. Various schemes such as aluminium sleeves with holes in them have been used to hold individual magnets. Commercially a stainless steel foil band is a common method but is better suited to poles made from one magnet not built up from several smaller ones.
If you can get them positioned then casting the whole magnet block with epoxy resin and filler is usually sufficient to hold them.
Flux