Disturbing new surveillance video shows the moment a 51-year-old man was brutally attacked by a hatchet-wielding maniac while at a Lower Manhattan ATM.

Disturbing new surveillance video shows the moment a 51-year-old man was brutally attacked by a hatchet-wielding maniac while at a Lower Manhattan ATM.

The footage, obtained by The Post on Tuesday, shows the victim at one of the ATMs inside a Chase Bank vestibule on Broadway near Beaver Street in the Financial District shortly before 5:30 p.m. Sunday when his attacker walks in, removes a hatchet from a dark bag, sneaks up behind him and begins slashing him.