Spherical Roller Bearings
Overview
Spherical roller bearings are available in EA, C, CD, and CA types designed for high load capacity. Types EA, C, and CD have pressed steel cages, while CA uses machined brass cages. All EA types are high-performance standard NMTHPS Series bearings.
NMTHPS Series bearings have especially high load capacity, high limiting speeds, and excellent performance at temperatures up to 200°C.
Designations suffixed with “E4” have an oil groove and holes on the outer ring. Since the depth of the oil groove in these bearings is limited, we recommend using an oil groove in the housing bore as well.
Features
- Self-aligning
The bearing automatically compensates for deviation from the shaft center and bending in the housing or shaft, preventing excessive force from being applied to it. - Support for all types of loads
Spherical roller bearings sustain radial loads, axial loads in both directions, and combined loads. - For fixed-end or free-end
Applications
- High load
Suited for equipment facing large radial loads, heavy loads, and impact loads - Mining equipment (powdering machines, vibrating screens, conveyors, etc.), gearboxes, air preheaters, extruders, centrifugal separators, construction machinery, steelmaking machinery, papermaking machines
FAQs
Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.
While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.
Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings. NMT uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.
