SNL3056 SKF Split Plummer Block Housing for 260mm Shaft
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The SKF SNL3056 is a cast iron split plummer block housing designed to support compatible spherical roller bearings and CARB toroidal roller bearings. Part of SKF’s SNL 30, 31 and 32 series, it provides a rigid bearing support for industrial machinery, while its removable housing cap simplifies bearing installation, inspection and maintenance.
The housing accommodates bearings with a 420 mm outside diameter and features a 166 mm bearing seat width and a 260 mm centre height. Its four-bolt base provides secure mounting, with elongated attachment holes allowing adjustment during installation.
When used with the bearing and adapter sleeve combinations listed below, the SNL3056 is suitable for a 260 mm shaft. Locating rings secure the bearing outer ring within the housing where axial location is required.
Designed for grease lubrication, the housing can be configured for through-shaft or shaft-end installations. Separate labyrinth and heavy-duty taconite seals allow the sealing arrangement to be selected for the operating environment.
Technical specifications
Brand: SKF
Product designation: SNL 3056
Housing series: SNL 30, 31 and 32
Housing type: Split plummer block housing
Housing construction: Two-piece, with removable cap
Housing material: Cast iron
Shaft diameter with the listed adapter sleeve: 260 mm
Bearing seat diameter, Da: 420 mm
Bearing seat diameter tolerance: G7
Bearing seat width, Ca: 166 mm
Centre height, H1: 260 mm
Overall length, L: 770 mm
Overall height, H: 516 mm
Housing width, A: 320 mm
Foot width, A1: 280 mm
Foot height, H2: 100 mm
Attachment bolt centres, J: 650 mm
Attachment bolt centres, axial direction, J1: 160 mm
Number of standard attachment bolt holes: 4
Attachment bolt hole length, N: 50 mm
Attachment bolt hole width, N1: 42 mm
Recommended attachment bolt size: M36
Lubrication: Grease
Housing seals: Supplied without seals
Mounting arrangements: Through shaft or shaft end
Approximate net weight: 221 kg
Compatible bearings, adapter sleeves and locating rings
SKF 23056 CCK/W33 spherical roller bearing: OH 3056 H adapter sleeve and 6 FRB 10/420 locating rings
SKF C 3056 K CARB toroidal roller bearing: OH 3056 H adapter sleeve and 6 FRB 10/420 locating rings
The locating ring quantities shown are totals per housing for an axially located outer ring. Non-locating spherical roller bearing arrangements normally require axial freedom in the housing. CARB bearings accommodate axial displacement internally and require the outer ring to be located.
Compatible sealing accessories
Labyrinth seal option: SKF TS 56
Heavy-duty taconite seal option: SKF TNF 56
Shaft diameter for the listed seals: 260 mm
Housing width including labyrinth seals: 330 mm
Housing width including taconite seals: 404 mm
End cover for shaft-end arrangements: SKF ETS 56
Bearings, adapter sleeves, seals, locating rings and end covers are selected separately to suit the installation. The 420 mm bearing seat diameter refers to the bearing outside diameter; the combinations listed above are for a 260 mm shaft. Other shaft sizes require different bearing and accessory combinations.
Available from Bearing King Ltd for industrial maintenance, bearing replacement and machinery assembly.
