INA 81240M Cylindrical Roller Thrust Bearings 200x280x62mm

Key Specifications

Design Features & Benefits

1. Premium Brass Cage Construction: The "M" suffix designates a precision-machined brass cage that offers superior thermal conductivity, wear resistance, and dimensional stability compared to polyamide alternatives. This makes the bearing particularly suitable for high-temperature, high-speed, or heavy-shock-load applications where maintaining structural integrity is critical.
2. Fully Separable Components: The three-part design allows independent installation and removal of each component, enabling flexible inventory management and convenient on-site maintenance. Component interchangeability within the same series further reduces operational costs and downtime.
3. Exceptional Axial Load Capacity: Optimized logarithmic roller profile and raceway geometry ensure even load distribution across all rolling elements, allowing the bearing to withstand extreme single-direction axial loads and occasional impact loads without deformation or premature failure.
4. Space-Optimized Design: With a compact axial dimension of 62mm, this bearing maximizes load performance in limited installation spaces, supporting equipment downsizing initiatives without compromising operational efficiency.
5. Precision Engineering: INA's advanced manufacturing processes, including state-of-the-art grinding and heat treatment technologies, ensure tight dimensional tolerances and uniform hardness of all bearing components, extending service life and minimizing maintenance requirements.
6. High Rigidity: The cylindrical roller design provides excellent rigidity under heavy loads, maintaining precise positioning and reducing deflection in critical applications.

Suffix Explanation

• 812: Series code for INA medium-sized single-row cylindrical roller thrust bearings, specifically designed for heavy axial load scenarios requiring moderate axial space.
• 40: Size code corresponding to an inner diameter of 200 mm, complying with international dimensional standards for this bearing series.
• M: Designates a machined brass cage, preferred for applications demanding high mechanical strength, temperature resistance, and durability.

Typical Applications

• Heavy-duty gearboxes, reducers, and power transmission systems in mining and construction equipment
• Large-scale industrial presses, stamping machines, and forging equipment
• Hydraulic and mechanical presses in metalworking industries
• Turbines, generators, and other power generation equipment
• Marine propulsion systems and offshore drilling equipment
• Heavy machinery used in steel production and processing
• Paper and pulp processing equipment under high load conditions
• Cranes, hoists, and lifting equipment requiring heavy axial load support

Installation Notes

1. Ensure precise alignment of the shaft washer, housing washer, and roller-cage assembly during installation to prevent misalignment-induced stress concentrations and premature wear.
2. Select lubricants specifically formulated for the operating temperature, speed, and load conditions; regular lubrication intervals are essential for continuous high-speed operation.
3. Utilize INA-specified mounting tools to avoid surface damage to the bearing's precision raceways and rollers, which could compromise performance.
4. Maintain the designed axial clearance or preload as specified by the equipment manufacturer to ensure proper load distribution and operational stability.
5. Never apply radial loads—this bearing is exclusively engineered for axial load support; radial loads will cause severe damage to the rollers and raceways.
6. Follow INA's official mounting and dismounting procedures for separable cylindrical roller thrust bearings to prevent component damage and ensure correct assembly.