Tapered roller bearings are designed to handle combined radial and axial loads simultaneously, with tapered rollers arranged between a tapered inner ring (cone) and tapered outer ring (cup). The LD-402 series features precision-ground tapered rolling elements that distribute load evenly across the roller length, making these bearings ideal for heavy-duty applications where both radial and thrust forces are present. The cone and cup are separable components, allowing for easy mounting, disassembly, and adjustment of bearing preload.

The LD-402 range includes the 30200, 30300, 32200, 32300, and 32000 series, offering a comprehensive selection of load capacities and sizes. The 30200 series is the standard single-row tapered roller bearing with medium duty capacity, while the 30300 series provides higher load ratings with wider rollers and steeper angles. The 32200 and 32300 series are double-row configurations that offer even greater radial and axial load capacity for the most demanding applications. Bore diameters range from 10mm to 200mm, with outer diameters from 30mm to 360mm.

Manufactured from high carbon chromium bearing steel (GCr15/SUJ2) with through-hardened raceways and rollers, the LD-402 series delivers exceptional durability and wear resistance under heavy load conditions. Case-carburized steel options are available for applications requiring enhanced impact resistance and fatigue life. The stamped steel cage provides reliable roller guidance and spacing, while machined brass cages are available for high-temperature or heavy-shock applications. Surface treatments include black oxide and phosphate coating for corrosion resistance.

Tapered roller bearings are commonly used in opposed pairs or multi-row arrangements to accommodate axial loads in both directions. Proper preload adjustment is critical for achieving optimal bearing life, stiffness, and running accuracy. The LD-402 series is manufactured to ABEC 1 through ABEC 3 precision standards, ensuring consistent quality and interchangeability. Typical applications include automotive wheel hubs, differential gears, transmission shafts, construction equipment, agricultural machinery, and heavy industrial gearboxes.