Y-bearing Units (Insert Bearing Units)
A sealed insert bearing pre-fitted into a cast or pressed housing, mounted straight onto an unmachined shaft with grub screws, an eccentric collar or an adapter sleeve. Self-aligning on assembly, so the housings do not need to be perfectly in line. SES holds the range as an authorised SKF distributor, covering shaft sizes 12 mm to 100 mm, plus inch equivalents; housing materials Grey cast iron, pressed steel, composite, stainless; locking Grub screws, eccentric collar, adapter sleeve, SKF ConCentra; sealing Contact lip, flinger, or multi-stage for heavy contamination. Executions include pillow block ball bearing units, flanged ball bearing units, take-up ball bearing units, pillow block roller bearing units, among others. It is specified most often into belt conveyor idlers, drives and take-up frames and bucket elevator head and boot 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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Supplying India’s Industrial Names.
From integrated steel plants to power utilities and EPC majors — the works that cannot afford a counterfeit part specify through SES.
Mounting
Onto drawn shaft — no machined seat required
Alignment
Self-aligning on the sphered outer ring
Housings
Pillow block, flanged, take-up, cartridge
Relubrication
Grease nipple on most housings
Where it runs.
You will find Y-bearing Units (Insert Bearing Units) in the parts of a plant where this particular duty actually occurs. In practice that means belt conveyor idlers, drives and take-up frames, bucket elevator head and boot shafts, agricultural and grain handling equipment, and equally fan and ventilation shafting in plant rooms, tea processing and packing line rollers, washdown lines in food and beverage plants. What links them is the duty rather than the machine name — mounting: Onto drawn shaft — no machined seat required. 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. Belt tension has to be adjusted in service — Take-up (tension) unit so the housing travels in a guided frame. Frequent caustic or high-pressure washdown — Composite or stainless housing with a food-grade fill — a grey iron housing will corrode through at the base. Shaft rotates in both directions or reverses under load — Grub-screw or adapter-sleeve locking, not an eccentric collar; collars can release on reversal. 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.
Self-aligning refers to take-up on assembly, not to continuous articulation. Once the grub screws are torqued the unit is fixed — if the frame moves in service the bearing carries it as an edge load. Send the designation off the failed part and we will confirm the SKF equivalent and stock position.