SNU500 Series Split Plummer Block Bearing Housings
SNU500 is a foot-mounted split plummer block family with a broad published size range and a clear metric selection path. The catalogue lists SNU505 through SNU532, shaft sizes from 20 to 140 mm and approximate housing weights from 1.9 to 64.0 kg.
Because SNU500 is a housing system, shaft diameter is only the first filter. The bearing reference, adapter sleeve, spacer or locating arrangement and base geometry have to work together. This is especially important when replacing an older pedestal where the casting number is readable but the internal components have been changed over time.
For a wider housing comparison, browse the bearings range before finalising the mounting style.
SNU500 is selected as a bearing station, not a casting
SNU505-SNU532 range
The catalogue provides a continuous family across many common industrial shaft sizes.
Approx. 1.9-64.0 kg housing range
Published mass varies widely, useful as a cross-check when identifying an existing casting.
Split foot-mounted construction
The cap can be opened for bearing service while the base remains bolted to the machine.
Separate bearing/sleeve data
The dimensional table includes bearing, adapter sleeve and spacer-ring information alongside housing dimensions.
A metric replacement checklist for SNU housings
Use the product drawing as the final dimensional authority. The points below are practical filters that help narrow the correct model before a full drawing comparison.
Read the SNU casting or machine BOM before choosing from shaft size alone.
H/H0, L and J dimensions often determine whether the pedestal will sit correctly on the existing base.
Bearing, sleeve and spacer arrangement should be checked as one set.
A large difference between the old housing and candidate size may indicate a wrong series or housing number.
SNU500 published technical range
The table below keeps the catalogue values used for this series. Use the model-specific drawing for the final interchange decision; dimensions and suffixes can vary inside a family.
| Specification point | SNU500 catalogue data |
|---|---|
| Series / model family | SNU505 to SNU532 |
| Duty class | General industrial split housing |
| Locking / bearing mounting | Bearing and adapter-sleeve arrangement selected by shaft and bearing |
| Published shaft range | 20-140 mm shaft range shown in catalogue |
| Published metric / inch options | 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 100, 110, 115, 125, 135, 140 mm |
| Housing / mounting style | foot-mounted split plummer block |
| Housing construction | Cast iron |
| Catalog dimensional fields | H, L, J, A, N, N1, H1, H0, A1, j, C, D1, bolt diameter, bearing, adapter sleeve and spacer ring |
| Published unit weight | Approx. 1.9-64.0 kg across published housing sizes |
Where the broad size range is useful
These are application patterns where the housing concept is commonly considered. Final suitability still depends on load, speed, alignment, environment and the machine designer’s requirements.
Long conveyor drives
The split housing allows bearing access while large shafts and coupled equipment remain substantially in place.
Industrial fans
Pedestal mounting and broad size coverage support many established fan and blower layouts.
Process lines with scheduled overhauls
SNU housings are convenient where bearings are inspected during planned shutdown windows.
General machinery retrofits
A detailed metric table helps compare older split housings when the machine documentation is incomplete.
Distinguishing SNU500 from SN and SNG
SNU500 overlaps SN500 in general application, but the catalogue presents different dimensional fields and model structure. SNG500 starts at a larger published shaft range and has its own geometry. Use the machine base, shaft height and internal component list to decide which family is truly compatible.
Rebuilding an SNU pedestal during planned maintenance
Matched housing halves should remain together through cleaning and inspection.
The pedestal should sit flat before final bolt tightening.
Do not assume the internal components are reusable because the cast housing looks sound.
Store housing, bearing and sleeve references together in the maintenance history.
Send the machine details for a model check
For SNU500, send the existing model marking, shaft diameter, mounting dimensions and a photo of the bearing position. GBC can review the information against the published series before quotation. Email: sales@australia-drive.com.
