- The bearing will sit **loose in the housing** — even 0.1m…

- The bearing will sit **loose in the housing** — even 0.1mm of play is catastrophic
- Under load, the outer race will **spin in the housing** (called "race spinning" or "bearing creep")
- This causes **rapid wear on the housing itself** — and aluminium housings are expensive/impossible to replace
- Heat builds up → bearing fails → potentially **destroys the drum shaft** too