RTS Prestige 25400403 Endmill Arbor Shell No. 40 S1 is a shell endmill arbor that accepts No. 40 shell cutters and mounts to a milling machine spindle. This RTS Prestige part provides the proper interface and alignment for shell milling work, helping ensure stable rotation and accurate cuts when using shell end mills. Identified by the model 25400403 with the S1 configuration, it is designed for compatible shell end mill tooling and arbors in precision milling applications.
