Provide various stop collars used for Motion Shaft Guide CNC Parts, used for 8mm/10mm/12mm/16mm/20mm linear shaft etc. Product description. Product The linear rail fixing ring is made of Aluminum alloy, and has been treated with natural anodizing on the surface, which is corrosion-resistant. Shaft Collar Inner diameter 12mm, outer diameter 30mm, thickness 10mm, suitable for SBR12 Linear Rail Easy to install and convenient. 3d Printer Shaft Stop Collar Set CNCMANS SBR20 Linear Rail Stop Collars Anti-Collision Block Stopper 4PCS Limit Fixing Rings For Linear Motion Rail Shaft Guide 20mm CNC Parts Tool Linear Rail Shaft Stop Collars 12mm Shaft Fixing Ring 𝗪𝗜𝗗𝗘 𝗔𝗣𝗣𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 - Our shaft collar set mainly used for shaft fixing and positioning, SBR linear guide stop for DIY CNC machine tools. Widely used in medical equipment, food processing, mechanical equipment, textile equipment, it is a high quality choice for all kinds of machinery and industry The stopper can be strongly fixed on the linear rail, shock resistant. 12mm SBR12 Linear Rail Shaft Stop Collar Shaft Limit Fixing Ring CNC Parts Packing list : 8PCS Shaft Stop Collar for SBR12 Linear Rail Size : Inner diameter 12mm, outer diameter 30mm, thickness 10mm. uxcell SBR12 Linear Rail Shaft Stop Collar Aluminum Alloy Clamp-on Widely used in transmission products, linear modules, engraving machines and various precision instruments.