Tapered Roller Bearings
Tapered rollers running between tapered raceways carry heavy combined radial and axial load in one direction. Fitted in opposed pairs so the arrangement can be set to a defined clearance or preload. SES holds the range as an authorised SKF distributor, covering bore range 15 mm to 1600 mm; rows Single, matched pairs, double and four-row; dimensions Metric (ISO 355) and inch (ANSI/ABMA) series; cage Pressed steel standard; machined for heavy series. Executions include single row tapered roller bearings, matched tapered roller bearings, double row tapered roller bearings, four-row tapered roller bearings, among others. It is specified most often into gearbox pinion and bevel shafts and conveyor pulley and idler shafts. Every part is genuine SKF through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
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From integrated steel plants to power utilities and EPC majors — the works that cannot afford a counterfeit part specify through SES.
Load
Heavy combined radial + axial, one direction
Arrangement
Opposed pairs — face-to-face or back-to-back
Setting
Adjustable clearance or preload on assembly
Separable
Cone and cup mount independently
Where it runs.
You will find Tapered Roller Bearings in the parts of a plant where this particular duty actually occurs. In practice that means gearbox pinion and bevel shafts, conveyor pulley and idler shafts, wheel ends on plant and haulage vehicles, and equally rolling mill roll necks in four-row form, vertical mill and crusher main shafts, winch and hoist drum shafts. What links them is the duty rather than the machine name — load: Heavy combined radial + axial, one direction. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the SKF range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. Bevel or helical gear generating a steady thrust — Back-to-back (DB) pair for maximum rigidity against overturning moment. Thermal growth expected between the two bearing seats — Set a running clearance rather than a preload, and account for the cone growing faster than the housing. Very heavy mill duty in a confined envelope — Four-row tapered roller bearing supplied as a matched, marked set. Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Record the shim pack or nut torque used to set the pair, and mark it on the machine history card. Almost every premature tapered-roller failure we see traces back to a setting that nobody documented at the last overhaul.