Short answer: `62` = deep-groove ball bearing, `0` = light dimension series, `5` = bore code → 25 mm bore.

Bore rule: 00 → 10 mm, 01 → 12 mm, 02 → 15 mm, 03 → 17 mm, 04 and above × 5 = bore in mm. Here 5 × 5 = 25 mm.