Split Plummer Block Housings (SNL / SAF)
A two-part cast housing that opens on the shaft centreline, so the bearing can be inspected or replaced without dismantling the drive or pulling the shaft. The standard mount for conveyor pulleys and fan shafts across heavy plant. SES holds the range as an authorised SKF distributor, covering series SNL 2/3/5/6, SNL 30/31/32, SNLN 30, SONL, SAF, SAW, SDAF; shaft range 20 mm to 1000 mm across the series; material Grey cast iron standard; cast steel for heavy shock; seals Labyrinth, double lip, felt, taconite, V-ring. Executions include SNL 2, 3, 5 and 6 series, SNL 30, 31 and 32 series, SNLN 30 series, SONL series, among others. It is specified most often into conveyor head, tail, drive and bend pulleys and ID and FD fan 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.
Construction
Split cap and base on shaft centreline
Bearings
Spherical roller or self-aligning ball
Mounting
Cylindrical seat or adapter sleeve
Sealing
Labyrinth, felt, taconite, or V-ring
Where it runs.
You will find Split Plummer Block Housings (SNL / SAF) in the parts of a plant where this particular duty actually occurs. In practice that means conveyor head, tail, drive and bend pulleys, ID and FD fan shafts, bucket elevator head shafts, and equally crusher and screen support shafts, line shafting in mills and processing plants, kiln and cooler drive shafts. What links them is the duty rather than the machine name — construction: Split cap and base on shaft centreline. 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. Heavy airborne dust — cement, coal, ore fines — Taconite sealing. A standard labyrinth will pass fines into the housing and the grease turns to lapping paste. Shaft must be located axially at one position only — One housing with locating rings fitted, the second left free to float; never fix both. Oil bath rather than grease — Housing prepared for oil with the correct level plug and a shaft seal rated for oil, not grease. 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.
Cap and base are line-bored as a pair and are not interchangeable between housings. They are stamped with a matching serial — if two housings are opened together on a shutdown, keep the caps with their own bases.