Mechanical locking system for floorboards

Building panels， especially floor panels are shown， which are provided with a locking system that is configured to lock the adjacent edges by angling and that have a tongue and a strip on the same edge， and a method to divide a board and produce such building panels. A method for dividing a floor element， into a first floor panel and a second floor panel， said floor element including a core provided with a decorative surface layer and a balancing layer， wherein the method includes the step of forming， through the balancing layer or the decorative surface layer， a second groove by displacing the floor element past a fixed tool.