This 4piece set provides end stops for SBR16 linear rails. Each collar clamps around a 16 mm shaft to create a fixed stop position, using an integrated screw to secure the collar. The aluminum alloy construction offers a strong yet lightweight solution for precise, repeatable travel limits in CNC, automation, and motion systems. Benefits Precise end stops: helps prevent overtravel and protects downstream components by providing repeatable stop positions on 16 mm shafts. Easy installation: clampon design with a securing screw; no special mounting hardware required. Durable and lightweight: aluminum alloy construction provides good strength with reduced mass and corrosion resistance. Flexible configuration: four collars allow stops on multiple axes or redundant positioning in a single setup. Key attributes Model/type: SBR16 Linear Rail Stop Collars (shaft limit fixing rings) Material: Aluminum alloy Compatibility: Designed for SBR16 linear rail systems and 16 mm diameter shafts Quantity: 4 pieces Fastening: with screw (collars are secured around the shaft by the included fixing screw) What's included 4 x stop collars for 16 mm shafts 4 x fixing screws (one per collar) Applications CNC machines: set Xaxis end stops on SBR16 rails to ensure safe travel limits and protect machinery. 3D printers: establish Z or Yaxis end stops on 16 mm linear rails for consistent layer alignment. Automated assemblies: position and fix components along 16 mm shafts in production lines, reducing drift and improving repeatability. Notes Fits SBR16 rail systems and 16 mm diameter shafts; compatible with standard 16 mm hardware used in typical linear rail assemblies. Ideal for users needing a straightforward, reliable shaft limit solution without complex mounting.