81208Cylindrical Roller Thrust Bearings

81208 Thrust Cylindrical Roller Bearing | 81208TN And 81208M Cage And Application

The 81208 is a high-performance single-direction thrust cylindrical roller bearing with standard dimensions of 40×68×19mm. Specially engineered to handle pure unidirectional axial loads, this bearing features high structural rigidity, low deformation rate and stable low-speed operation. It effectively restricts shaft axial displacement, absorbs continuous heavy thrust pressure and mechanical vibration, and maintains precise shaft positioning during long-cycle industrial operation. With densely arranged cylindrical rollers, the 81208 delivers excellent load-bearing capacity and structural stability, making it ideal for medium and heavy-duty thrust mechanical systems. The series includes two mainstream models: 81208TN with nylon cage and 81208M with solid brass cage to fit standard and harsh working environments.

81208TN Bearing (Nylon PA66 Cage)

81208TN adopts a high-strength injection-molded PA66 nylon cage, acting as the universal and cost-effective standard version. The lightweight and high-toughness nylon retainer ensures smooth and precise roller circulation, effectively reducing running friction and operating noise during continuous medium-load operation. Featuring a low friction coefficient, excellent lubricity and stable anti-fatigue performance, the nylon cage avoids rigid metal friction and internal abrasion. It provides reliable corrosion resistance and stable grease retention, extending the bearing’s overall service life. Suited for clean, normal-temperature and conventional industrial conditions, 81208TN offers consistent performance and outstanding cost efficiency for general thrust transmission machinery.

81208M Bearing (Solid Brass Cage)

81208M is equipped with a precision machined solid brass cage, built for heavy-duty, high-temperature and high-impact working scenarios. The high-rigidity integral brass cage delivers superior thermal stability, structural strength and shock resistance compared with standard nylon cages. It maintains accurate roller spacing and complete structural integrity under extreme temperatures, instantaneous heavy thrust loads and long-term nonstop operation. This design effectively prevents roller skew, structural deformation and premature wear, greatly improving operational stability and service durability. As a premium heavy-duty model, 81208M is ideal for critical core equipment requiring zero-failure continuous operation in harsh industrial environments.

Bearing Material And Structural Advantages

All 81208 series bearings are manufactured from high-purity chrome bearing steel. After integral quenching and ultra-precision surface grinding, raceways and cylindrical rollers achieve high surface hardness, excellent wear resistance and stable mechanical properties. The flat raceway structure ensures uniform force distribution, eliminates local stress concentration and minimizes elastic deformation under heavy loads. Its compact high-rigidity structure supports stable heavy axial thrust capacity, ensuring long-term precise positioning and reliable operation of mechanical shafts.

Industrial Applications

81208 thrust cylindrical roller bearings are widely used for heavy axial load support and shaft limit positioning. 81208TN applies to general heavy machinery, medium-sized gear reducers, automated production equipment and conventional transmission systems. 81208M suits rigorous working conditions including high-temperature processing machinery, hydraulic systems, mining auxiliary equipment and heavy industrial devices enduring continuous heavy-load and shock operation.

Product Summary: The 81208 thrust roller bearing provides high rigidity and superior heavy-thrust capacity for medium and heavy-duty mechanical systems. 81208TN delivers economical, low-noise stable performance for standard environments, while 81208M offers high-temperature and anti-shock durability for harsh scenarios, fully covering mainstream industrial heavy-thrust application demands.