Ball bearing units for high temperature applications
Mounted units built for shafts that run hot: heat-stabilised bearing rings, high-temperature grease or solid lubricant, and housings that allow the shaft and insert to expand. They cover the range between ordinary units and dedicated furnace bearings. SES holds the range as an authorised SKF distributor, covering temperature range Typically to 180 °C, higher with special execution; internal clearance C3 or C4 as standard for hot duty; ring treatment Heat stabilised for dimensional stability; housing Cast iron or cast steel, some with cooling fins. Executions include high temperature pillow block units, high temperature flanged units, units with graphite cage inserts, units with heat-resistant seals, among others. It is specified most often into kiln and dryer discharge conveyor shafts and hot air recirculation fan bearings on tunnel dryers. 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.
Temperature
Continuous duty above standard unit limits
Rings
Heat stabilised, greater internal clearance
Lubrication
High-temperature grease or solid lubricant
Sealing
Heat-resistant seals or labyrinth
Where it runs.
You will find Ball bearing units for high temperature applications in the parts of a plant where this particular duty actually occurs. In practice that means kiln and dryer discharge conveyor shafts, hot air recirculation fan bearings on tunnel dryers, bakery and biscuit oven band and chain shafts, and equally clinker and hot ash conveyor drive ends in cement plant, furnace charging car wheel bearings, textile stenter and heat-setting machine roller ends. What links them is the duty rather than the machine name — temperature: Continuous duty above standard unit limits. 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. The shaft grows several millimetres between cold and running condition — Let the insert float in one housing while the other is grubscrewed. Locking both ends on a hot conveyor shaft drives the grubscrews into the shaft and the housings walk off their bolts. Bearing temperature exceeds the limit of the standard seal material — Go to the heat-resistant seal grade or an open unit with a labyrinth. Nitrile seals harden, then crack away and drop the fragments straight into the raceway. The grease charge burns off between the planned lubrication intervals — Shorten the interval on measured temperature, or move to a solid lubricated execution. Simply switching to a higher-spec grease at the same interval usually leaves the same gap unfilled. 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.
Take the temperature at the housing cap with a probe, at running condition, before you specify anything. Sites routinely quote the process temperature and buy a bearing rated for 200 °C when the housing has never seen 90 °C, and the wrong grease then channels because it never gets hot enough to work.