Fits front caster replacement for 1S, T7, S50, S51, 1C, 2C, 1T and D9/F9 sweeping robots — restores mobility and reliable navigation. Key benefits Restores smooth movement: the universal 360° caster wheel lets your robot turn around furniture, corners, and obstacles so cleaning cycles complete without getting stuck. Broad compatibility: specifically designed to fit the front caster slot of the listed models, making it a direct replacement without modification. Durable construction: made from wearresistant materials to withstand contact with hardwood, tile, and carpet, preserving consistent performance over time. Fast, tool installation: remove the worn caster and snap this unit into place to quickly your robot to full function. What customers need to know Function: front caster wheel enabling omnidirectional rotation for stable, responsive navigation. Compatibility: fits models 1S, T7, S50, S51, 1C, 2C, 1T and D9/F9 sweeping robots. Materials & performance: built to resist abrasion from floors and maintain smooth rolling and alignment for longterm use. Installation: designed to match the original caster form factor for the listed models; no complex tools required. Practical use scenarios a cracked or seized caster after your robot repeatedly stalls at thresholds or under furniture, restoring normal operation in minutes. Preventive maintenance before a heavyuse season (pets or guests) to ensure reliable navigation across hardwood, tile, and carpet. Swap a worn caster to reduce uneven movement or excessive vibration that can affect cleaning efficiency and sensors. Why this part matters A single worn or damaged front caster can cause your sweeping robot to veer, stop, or miss areas. This replacement part brings back stable, 360° rotation and dependable floor contact so your device cleans as intended without expensive service visits.