Deep Groove Ball Bearings
Known for a compact and simple internal structure, this type is suitable for carrying radial loads together with moderate axial loads in both directions. In gearboxes, it is often selected for light- to medium-duty shaft support where low friction, smooth running, and economical design are important, especially in input shafts, auxiliary shafts, and compact transmission sections.
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Angular Contact Ball Bearings
With a defined contact angle between balls and raceways, this type is better suited for combined loads and more accurate shaft positioning. Single-row, duplex, or matched arrangements can be used according to gearbox layout. It is commonly applied in helical gear stages, high-speed shaft positions, and other locations where axial thrust, stiffness, and running accuracy matter.
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Cylindrical Roller Bearings
Line contact between rollers and raceways gives this type higher radial load capacity and greater rigidity than ball bearing designs. Different versions, such as single-row, double-row, and separable structures, allow flexible gearbox assembly and shaft arrangement. It is widely used on intermediate shafts and output shafts where heavy radial loads, precise support, and stable operation are required.
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Tapered Roller Bearings
Its tapered rolling elements and raceway geometry allow radial and axial loads to be supported simultaneously, making it highly effective in heavily loaded transmission stages. By adjusting internal clearance or preload, it can also improve shaft control and meshing stability. This type is often used on pinion shafts, output shaft positions, and gearbox stages with significant thrust loads.
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Needle Roller Bearings
A very slim cross section combined with a high roller count allows this type to carry strong radial loads in limited installation space. Different forms, including drawn cup and machined-ring designs, make it useful in compact gearbox structures. It is especially common in planet gear pin locations, idler gear supports, and small transmission units where space saving is critical.
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Spherical Roller Bearings
Two rows of rollers working with a spherical raceway allow this design to handle heavy loads while also accommodating shaft deflection and misalignment. That makes it valuable in gearbox systems exposed to shock, housing deformation, or harsh operating conditions. It is mainly used in large industrial reducers and low-speed output sections where durability and tolerance to misalignment are important.
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Journal Bearings
Instead of rolling elements, this design relies on an oil film formed between the shaft and bearing surface, making it suitable for applications requiring quiet running and stable support at very high speeds or heavy loads. In gearbox systems, it is mainly found in large industrial, marine, and turbomachinery units where fluid-film lubrication can be maintained reliably.
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Tilting Pad Thrust Bearings
Multiple pivoting pads automatically adjust to form a stable oil film under axial load, helping improve load distribution, reduce edge stress, and control temperature rise. This makes the design highly effective where axial thrust is large and operating conditions are demanding. It is mainly used in high-power gearbox systems and integrated drive units requiring reliable axial positioning.
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