Rev-A-Shelf bottom mount shaft is a lazy susan hardware component made for 4WLS wood Susans and identified by manufacturer part RS4BM1-18-52. This bottom mount lazy susan hardware is designed for use with two wood trays in compatible Rev-A-Shelf shelf setups. Rev-A-Shelf states that bottom mount hardware can only be used with Rev-A-Shelf shelves, which helps buyers focus on matching parts correctly before install. For cabinet shops, installers, and serious remodel buyers sourcing wood lazy susan hardware, this part supports custom shelf applications that use Rev-A-Shelf hardware kits for wood or melamine shelving. The product is sold each, so buyers can order the exact quantity needed for a repair, replacement, or new cabinet build using a bottom mount shaft for wood trays.
Key specs to confirm: This Rev-A-Shelf lazy susan shaft is described as a bottom mount shaft for 4WLS wood Susans and for use with 2 wood trays. Before purchase, confirm that your application uses compatible Rev-A-Shelf shelves, because the product data states that bottom mount hardware can only be used with Rev-A-Shelf shelves. Also confirm your cabinet opening, tray count, shaft mounting style, and whether your project uses wood or melamine custom shelving hardware from the same system. The verified data does not provide exact dimensions for the shaft, cabinet height range, or detailed mounting measurements, so those fit details should be checked in manufacturer technical documentation. Any additional load, compliance, or installation details should also be confirmed with the manufacturer or technical documentation.
What's included: Verified data identifies this item as a bottom mount shaft for 2 wood trays. It is sold each. Other included components are not specified and should be confirmed before ordering.
What to verify before ordering: Confirm that you are replacing a Rev-A-Shelf part, that your lazy susan uses a bottom mount setup, that it is built around 4WLS wood shelves, and that your cabinet project requires hardware for two wood trays rather than another tray count or mounting style.
When a corner cabinet lazy susan stops turning properly or a custom shelf build needs the right shaft, buyers usually need clear fit guidance more than broad marketing language. This product is a Rev-A-Shelf bottom mount shaft intended for 4WLS wood Susans and configured for two wood trays. That makes it relevant for cabinet professionals replacing worn lazy susan replacement hardware and for builders assembling a compatible Rev-A-Shelf shelf system from matched parts.
A common use case is a repair where the existing shaft is damaged, missing, or no longer matches the tray setup inside the cabinet. In that situation, the most important point is compatibility. Rev-A-Shelf states that this bottom mount shaft for wood trays can only be used with Rev-A-Shelf shelves. If a buyer is trying to adapt mixed-brand parts or unknown shelves, that is a detail to stop and verify before ordering. Matching the shelf family matters because the shaft, trays, and mounting layout need to work together inside the cabinet.
Another realistic scenario is a custom cabinet project using wood or melamine shelving. The verified product data states that Rev-A-Shelf hardware kits for wood or melamine custom shelving are tested to meet and exceed BHMA Class-I specifications of 20 lb per square inch at 100,000 cycles. For a shop planning a dependable rotating shelf assembly, that gives useful context about the broader hardware system. It does not replace the need to confirm exact shaft dimensions, cabinet clearances, or included mounting pieces, because those details are not provided here. Buyers should check current technical documentation if they need precise measurements for install planning.
Part-number shoppers may also search by RS4BM1-18-52, rev a shelf, or revashelf when trying to match an old order, service record, or spec sheet. In those cases, this page helps connect the exact manufacturer part to the plain-language product type: a Rev-A-Shelf lazy susan shaft with bottom mount configuration for two wood trays in a 4WLS wood Susan application.
When comparing lazy susan replacement hardware, buyers usually look at mounting style, tray compatibility, and whether the part is meant for a complete system or a mixed setup. A bottom mount shaft like this one is different from hardware intended for other mounting arrangements, so the first comparison point is always the cabinet's existing hardware style. If the cabinet was built around a bottom-mounted rotating assembly, replacing it with the same type helps avoid unnecessary rework.
The next comparison point is shelf compatibility. This Rev-A-Shelf bottom mount shaft is specifically tied to Rev-A-Shelf shelves and to 4WLS wood Susans. That clear limitation is useful because it narrows the field and reduces ordering errors. Generic hardware may appear similar in photos, but without verified compatibility it can create alignment issues, tray fit problems, or extra installation steps.
Tray count is another practical factor. This product is described for two wood trays, which matters when matching the hardware to the cabinet's internal layout. Buyers should not assume a shaft for one tray count will fit another arrangement. They should also confirm whether additional brackets, bearings, or fasteners are needed, since only the shaft itself is verified in the available data.
For trade buyers who value consistency, staying within one manufacturer's shelf and hardware family can make planning easier. Rev-A-Shelf identifies this part clearly by product type and part number, and the product data also notes use in custom wood or melamine shelving hardware kits. That gives buyers a factual basis for selecting a matched part rather than guessing from appearance alone.
This Rev-A-Shelf bottom mount shaft is stated to work only with Rev-A-Shelf shelves.
This bottom mount shaft is described for 2 wood trays in a 4WLS wood Susan setup.
This Rev-A-Shelf lazy susan shaft is identified for use with two wood trays.
This Rev-A-Shelf hardware component is used in wood or melamine custom shelving applications when matched to compatible Rev-A-Shelf shelves.
This product listing does not provide exact shaft dimensions, so buyers should confirm measurements in manufacturer technical documentation.
This listing verifies a bottom mount shaft sold each, but other included components are not specified.
This replacement hardware should be matched by brand, mounting style, tray count, and compatible Rev-A-Shelf shelf family.
Rev-A-Shelf hardware kits for wood or melamine custom shelving are stated as tested to meet and exceed BHMA Class-I specifications of 20 lb per square inch at 100,000 cycles.
This lazy susan hardware should be installed by following manufacturer installation guidance and local building requirements where applicable.
Rev-A-Shelf lazy susan shaft is easiest to buy correctly when you confirm the shelf family, mounting style, and tray count before checkout. This part is verified as a bottom mount shaft for 4WLS wood Susans and for two wood trays, sold each. Before ordering, check that your cabinet uses compatible Rev-A-Shelf shelves and review manufacturer documentation for exact dimensions, included hardware, and installation details. That simple fit check helps avoid delays on replacement jobs and custom cabinet builds.
Sold In: 1 Each