It happened on January 26, a Sunday morning, inside a store on Beach Avenue.
The video shows the suspect pushing the 34-year-old victim away from the machine while trying to snatch cash out of her hand.
The woman tried to get away, but the man grabbed $30 before taking off.
The victim was not seriously hurt.
Anyone with information about the suspect or the crime is urged to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
You can also submit tips by visiting the CrimeStoppers website at crimestoppers.nypdonline.org or by messaging on Twitter @NYPDTips.
----------
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube