1PCS OneWay Clutch Bearing with Double Keyway (Csk30pp) — available sizes: 8, 10, 12, 15, 17, 20, 25, 30, 35, 40 and PP variant Key benefits Reliable antireverse action: Designed to allow smooth rotation in one direction while positively preventing backward rotation, solving common problems of sprocket, roller or shaft backdriving. Secure torque transmission: Double keyway design provides firm axial and torsional engagement for reliability in repeated start/stop and reversal situations. Simple replacement and installation: Compact form factor and keyed bore make mounting straightforward and reduce downtime during service or upgrades. What makes this product unique Double keyway clutch design for improved fit and torque transfer compared with singlekey alternatives. Backcheck (oneway) function integrated into a single compact bearing unit (model Csk30pp). Offered in a wide range of shaft sizes to match common mechanical and automation shafts. Key attributes Model: Csk30pp Quantity: 1PCS Functionality: Oneway (antireverse) clutch bearing / back check bearing Feature: Double keyway for enhanced mounting stability and torque transmission Available sizes: 8, 10, 12, 15, 17, 20, 25, 30, 35, 40 and PP variant Typical performance characteristics: positive onedirection engagement, repeatable operation, compact mounting envelope Applications / use cases Conveyor and material handling: Prevents rollers or driven shafts from backdriving under load or during stop/start cycles, improving safety and line stability. Motor and starter systems: Acts as a backstop in small motors or gear trains to prevent reverse rotation during shutdown or torque reversals. Indexing and automation: Provides precise, dependable antireverse control for indexing shafts, cams, or feed mechanisms where accurate oneway engagement is required. Compatibility and installation notes Choose the size that matches your shaft diameter (available sizes listed above). The double keyway requires matching key(s) for correct installation; verify key dimensions and orientation against your shaft and hub design. Sold as a single piece (1PCS) — quantity according to the number of shafts to be protected. Why choose this clutch bearing Combines simple installation with a robust doublekey mounting solution and dependable oneway engagement. Provides a direct, compact solution when antireverse protection and secure torque transfer are required. Model Csk30pp is offered in multiple shaft sizes to fit common industrial and mechanical applications. If you require a specific size, confirm the exact shaft diameter and key dimensions before ordering to ensure correct fit and performance.