The L91 adjustable belt grinder in the three-phase configuration with base is a professional solution for deburring, satin finishing, blending and surface preparation on metal parts, welded assemblies, tools and components used in precision mechanical production. The self-supporting arrangement with dedicated base improves machine stability, supports the operating loads generated during continuous work and provides a reliable setup for processing medium and large workpieces. The adjustable grinding arm allows the abrasive belt to be positioned according to the geometry of the component, making the machine effective on flat faces, edges, profiles and areas that are less accessible with fixed belt systems. The 400 V three-phase motor, rated at 2/3 HP with two speeds of 1400 and 2800 rpm, allows the operator to select a belt speed of 15 or 30 m/s according to material hardness, stock removal requirement and target finish. The 50 mm belt with 2000/2500 mm development provides a generous working length and smooth running for both controlled grinding and finer finishing stages. The Ø200 x 50 mm contact wheel supports constant pressure and repeatable results, while the 72 dB noise level helps maintain a better working environment. With overall dimensions of 60x90x105 cm and a machine weight of 85 kg, the L91 is suitable for machine shops, maintenance departments, metal fabrication and automotive environments where reliability and process control are essential.