Pillow Block Ball Bearing Units
The insert bearing sits in a two-bolt foot-mounted housing that bolts down beside the shaft. This is the default mounted bearing on conveyors and shaft drives across almost every plant. SES holds the range as an authorised SKF distributor, covering housing designations SY, SYJ, P, UCP and equivalent series; shaft sizes Approximately 12 mm to 100 mm; materials Grey cast iron, cast steel, pressed steel, composite; bolt holes Two, slotted for alignment. Executions include cast iron pillow block units, pressed steel pillow block units, cast steel heavy duty pillow blocks, composite housing pillow blocks, among others. It is specified most often into conveyor drive and idler pulley shafts and trough and belt feeder head 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.
Housing
Two-bolt foot mounting, base to centre fixed
Bolting
Slotted holes for lateral adjustment
Bearing
Insert ball with spherical seat
Orientation
Any, though grease port position matters
Where it runs.
You will find Pillow Block Ball Bearing Units in the parts of a plant where this particular duty actually occurs. In practice that means conveyor drive and idler pulley shafts, trough and belt feeder head shafts, fan shafts on furnace cooling and dust extraction, and equally mill and workshop line shafts, screw conveyor drive ends in cement and fertiliser plant, bucket elevator boot shafts in grain handling. What links them is the duty rather than the machine name — housing: Two-bolt foot mounting, base to centre fixed. 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 mounting surface is fabricated plate rather than machined — Grout or shim the base flat before bolting down. A pillow block pulled down onto a bowed plate distorts the housing bore and the insert loses its ability to align. The shaft is long and the two pillow blocks are far apart — Fix one and let the other slide within the spherical seat. Locking both grubscrew sets on a long shaft loads the housings axially and cracks a foot on the first hot run. Cast iron housing sits where it can be struck by falling lumps or scrap — Move to a cast steel or pressed steel housing. Grey iron takes an impact by snapping through the bolt boss with no warning and the shaft drops. 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.
Keep the grease nipple pointing where a gun can actually reach it. Housings are routinely bolted down with the port facing a guard, and the fitter then makes his own hole in the top of the casting, which is how dirt gets in.