Raw and Analyzed Data for: Research into Influence of Swirling Wood Grain on Wood Splintering at Milling Finger Joint Elements

The purpose of this research is to investigate the influence of wood fibre swirl on wood splintering during milling of finger joint elements.The research was carried out using examples of jointed cladding slats (BlockHouse about 25 mm thick) made of larch wood, used for the exterior finishing of the entrance group of a building in the city of Kharkiv (Ukraine), where they are protected from direct exposure to moisture and other atmospheric influences. The cladding slats have a protective lacquer coating. For joining the slats, finger joints with a length of 12,5 mm (taking into account their blunting) were used; the finger pitch was 4 mm.This spreadsheet shows the results of identifying the parameters of the dependence of the probability of wood splintering on the angle between the annual growth ring and the longitudinal axis of the slat.The initial photos were taken in the summer of 2019. In December 2025, additional photos were taken at the same location with a ruler added for easy scaling of the images.At this stage of the research, the following photos were used: photo_20190709_110809.jpg, photo_20190709_110820.jpg, photo_20190709_110856.jpg, photo_20190827_073514.jpg.