SN500 Series Split Plummer Block Bearing Housings
SN500 is a split plummer block housing rather than a preassembled insert-bearing unit. The cap can be removed from the base so the bearing, sleeve and sealing arrangement can be serviced without treating the complete housing as a disposable cartridge. That makes SN500 relevant to larger industrial shafts and equipment where access matters.
The housing is only one part of the bearing station. The source catalogue links housing size with bearing, adapter sleeve and locating-ring information, and shows a 20-140 mm shaft range. Procurement should therefore work from the complete shaft-support arrangement rather than ordering an SN casting from the shaft diameter alone.
For a wider housing comparison, browse the bearings range before finalising the mounting style.
Industries that value split-housing service access
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.
Bulk conveyors
Split housings are useful on long shafts where bearing service should not require removing the entire shaft assembly.
Fans and blowers
Foot-mounted housings provide a practical service point around larger fan shafts and drive trains.
Crushers and process machinery
The rebuildable housing format suits equipment maintained through planned shutdowns.
Pulp, mining and general industry
Wide shaft coverage and separate bearing selection make the platform adaptable to many established industrial machines.
SN500 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 | SN500 catalogue data |
|---|---|
| Series / model family | SN505 to SN532 |
| 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 to 140 mm in the published series, with matched bearing, adapter sleeve and locating ring options |
| Housing / mounting style | two-bolt foot-mounted split plummer block |
| Housing construction | Cast iron |
| Catalog dimensional fields | D, L, A, H1, g, H, C, H0, J, S, N, N1, d2, d3, f1, f2, bearing, adapter sleeve and locating ring |
| Published unit weight | Model dependent |
A housing platform, not a single-piece bearing unit
Split cap and base
The upper housing can be removed for bearing access while the base remains mounted to the machine.
Bearing and sleeve selected separately
The final shaft support depends on the specified bearing, adapter sleeve and locating arrangement.
20-140 mm catalogue shaft range
The published family spans a wide set of industrial shaft sizes.
Two-bolt foot mounting
The housing is installed on a base structure rather than directly on a machine face.
Opening and rebuilding an SN500 station
Do not mix housing caps between bases during a multi-bearing overhaul.
Dirt under the base or between split surfaces can affect alignment.
A bearing change is the right time to review the other parts of the station rather than reusing them automatically.
The rebuilt shaft line should turn without one housing being forced into alignment by the mounting bolts.
Build the bearing station from the inside out
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.
Record the bearing reference and adapter sleeve from the existing station; an SN casting number alone is incomplete.
Locating rings and shaft arrangement should follow the machine design for each bearing position.
Check base length, mounting-hole centres, shaft height and available seal space.
The end configuration is part of the housing system and should be matched to the environment and existing machine design.
SN500 compared with other 500-series housings
SN500 is one member of the split plummer-block group. SNU500 and SNG500 cover similar industrial roles with different published geometry and model structure. SAF500 is the inch-oriented heavy industrial family. Cross-reference should be based on housing dimensions plus bearing/sleeve arrangement, not on “500 series” alone.
Send the machine details for a model check
For SN500, 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.
