This study investigates the surface finishing process using lapping films with electrocorundum grains of nominal sizes 30, 12, and 9 μm on RG7 tin bronze alloy. The research focuses on the impact of random grain distribution on film performance and the influence of grain sizes on surface finish. Scanning electron microscopy (SEM) was used to analyze the surface structure of the abrasive films, revealing distinctive structures formed by the specific aggregation of abrasive grains. The study also examines microchips generated during the lapping film finishing process, observing their morphology and distribution. The chip segmentation frequency was determined to be approximately 0.8 to 3 MHz, which are very high frequencies unique to known chip-forming processes. The absence of spherical chips in the RG7 bronze alloy surface finishing process was noted. Additionally, the study analyzes machined surface roughness parameters, chip segmentation frequency, and machining trace width, highlighting variations in surface characteristics based on lapping film grade. The findings emphasize the importance of optimal film selection for achieving desired finishes in diverse applications.This study investigates the surface finishing process using lapping films with electrocorundum grains of nominal sizes 30, 12, and 9 μm on RG7 tin bronze alloy. The research focuses on the impact of random grain distribution on film performance and the influence of grain sizes on surface finish. Scanning electron microscopy (SEM) was used to analyze the surface structure of the abrasive films, revealing distinctive structures formed by the specific aggregation of abrasive grains. The study also examines microchips generated during the lapping film finishing process, observing their morphology and distribution. The chip segmentation frequency was determined to be approximately 0.8 to 3 MHz, which are very high frequencies unique to known chip-forming processes. The absence of spherical chips in the RG7 bronze alloy surface finishing process was noted. Additionally, the study analyzes machined surface roughness parameters, chip segmentation frequency, and machining trace width, highlighting variations in surface characteristics based on lapping film grade. The findings emphasize the importance of optimal film selection for achieving desired finishes in diverse applications.