HM124649 OR-641152 Railway train bearings
HM124649 / HM124616XD Product Introduction
The HM124649 / HM124616XD is a premium inch-based TDO double-row tapered roller bearing engineered exclusively for standard-class railway wheel set systems. Featuring a classic two-cone single integrated double-cup layout, this bearing assembly combines two independent HM124649 inner cones with a robust one-piece HM124616XD outer cup, matched with a precision internal spacer to maintain consistent axial clearance during dynamic operation. Its standardized structural design delivers balanced load distribution and reliable assembly compatibility, making it a mainstream fixed-end bearing for conventional and medium-heavy haul rail vehicles.
Fabricated from high-purity 52100 chrome bearing steel and processed with professional heat treatment and superfinishing technology, this bearing achieves uniform internal metallographic structure and stable mechanical performance. The precisely optimized roller and raceway contact contour effectively buffers frequent track vibration and alternating impact loads generated during vehicle operation, reducing local stress concentration and friction loss. It maintains steady rotational accuracy and outstanding wear resistance under long-duration continuous running and all-weather outdoor track conditions, ensuring prolonged fatigue service life and low operational failure rate.
Equivalent to the railway standard models TAROL5×9-U-JP and BT2-8735BB, this bearing features compact overall dimensions and excellent comprehensive load capacity. It balances lightweight structural design and high rigidity, perfectly adapting to the daily operation requirements of medium-load railway freight and passenger vehicles. As a key supporting component of wheel set axle box systems, it effectively improves running smoothness and reduces routine maintenance costs for rail transit equipment.
Technical Specifications
Inner Diameter (d): 119.957 mm
Outer Diameter (D): 194.874 mm
Assembled Total Width (T): 125.252 mm
Inner Cone Width (B): 57.150 mm
Bearing Weight: 14.85 kg
Product Features & Advantages
1. Standardized 5×9 inch railway specification ensures wide versatility and perfect compatibility with mainstream domestic and international rail vehicle wheel set assemblies;
2. Integrated double outer cup structure enhances overall structural stability, avoids assembly clearance errors, and guarantees high-precision stable rotation of wheel sets;
3. Optimized internal contact structure reduces operating friction and heat accumulation, adapting to long-cycle and high-frequency continuous railway operation scenarios;
4. High-quality steel material and mature manufacturing process provide excellent vibration resistance and fatigue durability, meeting the long-term stable operation needs of medium-load rail transit lines.
Application Range
Widely applied to fixed-end wheel set bearing systems for standard railway passenger cars and medium-heavy load freight wagons. It is suitable for conventional railway transportation lines with stable load and frequent running cycles, providing reliable and long-lasting load-bearing support for rail vehicle bogie and axle box systems.
