Used STUDER S21 #9289807 for sale

STUDER S21 is a wafer grinding, lapping & polishing equipment specially tailored for high-precision processing of substrates (chiefly used in optics and surface generation). The system features a surface grinder, lapper and polisher, all mounted on a single base plate for enhanced flexibility. The grinder comprises two spindles driven by an 8-pole synchronous motor. The first spindle houses a grinding wheel for fast and even grinding of the substrates, and the second one operates at a much lower speed to obtain fine surface finishes. Additionally, a patented wet grinding/drying unit generates even better results. An incremental distance control feature is also available to generate repeatable and accurate parts. The lapping unit in S21 uses multiple disks which can be set in different configurations for different process requirements. The disks cover the entire lapping surface and evenly spread the abrasive slurry over the working area, thereby ensuring uniform polishing. An adjustable feeding machine helps to keep the lapping disks in contact with the substrate surface, while a lift-off control keeps the lapping process under control. The polishing unit is designed to deliver clean and clear surfaces with excellent optical properties. A floating head assembly and a kinetic head motion tool ensure uniformity of results and constant contact with the surface. This greatly reduces the time required for polishing while ensuring consistent results. STUDER S21 is a powerful and reliable tool capable of delivering high accuracy results over long production cycles. The unit is user friendly with an intuitive graphical control interface for smooth programming and operation. Thanks to the flexibility and ease of the asset, users can conveniently set up and start processing of their substrates with minimal effort.