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When a fixed caster just won't cut it and you need true 360° load movement without repositioning your workpiece, ball transfer bearing unit casters are the solution DIY builders, workshop owners, and light industrial assemblers rely on. These male-thread bolt-mount units let you roll, rotate, and redirect loads effortlessly — eliminating the friction and frustration of dragging heavy panels, boxes, or assemblies across a flat surface.
Each ball transfer unit consists of a large load-bearing ball seated in a precision-formed housing, supported by a ring of smaller recirculating steel balls that distribute weight evenly. The male-threaded bolt shank (available in M5, M6, M8, M10, and up to M40 across model sizes CY-12D through CY-40F) allows direct mounting into tapped holes or through panels with a nut. Housing diameter ranges from approximately 12 mm (0.47 in) on the CY-12D up to 40 mm (1.57 in) on the CY-40F. Bead material options include Carbon Steel, Nylon, and Stainless Steel to match your load, environment, and surface-protection requirements.
Typical use cases include DIY assembly tables and packing benches where workers need to slide and rotate workpieces without lifting, light conveyor roller systems for boxes and totes in garages or small warehouses, and furniture-making jigs where scratch-free multi-directional movement is critical. Long-tail applications such as "male thread ball transfer unit for workbench", "M8 bolt-mount conveyor ball caster", and "stainless steel ball transfer unit for food-safe surfaces" are all covered by the variant range available here.
| Product Type | Ball Transfer Bearing Unit Caster |
|---|---|
| Mount Type | Male Thread Bolt (threaded shank) |
| Available Models | CY-12D, CY-19D, CY-25D, CY-25F, CY-40F |
| Housing Diameter Range | Approx. 12 mm – 40 mm (0.47 in – 1.57 in) |
| Thread Size Range | See variant options |
| Bead Material Options | Carbon Steel / Nylon / Stainless Steel |
| Housing Material | See variant options |
| Load Capacity per Unit | See variant options |
| Rolling Direction | 360° omnidirectional |
| Quantity Options | 1 Pcs / 4 Pcs |
| Surface Compatibility | Flat, smooth hard surfaces |
| Corrosion Resistance | Stainless Steel variant: suitable for damp environments; Carbon Steel / Nylon: dry indoor use recommended |
Select based on your load weight and the mounting hole size you can accommodate. The CY-12D (~12 mm housing) suits light loads and small jigs, while the CY-40F (~40 mm housing) handles heavier conveyor or industrial workbench applications. As a general rule, use a larger model when the load per unit exceeds what a smaller housing can safely distribute. If you are building a 4-unit table, divide the total expected load by 4 to find the per-unit requirement.
Carbon Steel is the most economical choice for dry indoor environments with moderate loads. Nylon beads are ideal when you need to protect delicate or finished surfaces from scratching, or when the load is lightweight. Stainless Steel is the right pick for damp, humid, or washdown environments where rust resistance is a priority — such as food prep areas, outdoor workshops, or marine applications.
Load capacity varies by model size and bead material. Larger models (CY-25F, CY-40F) support significantly higher loads than the compact CY-12D. For confirmed load ratings per model and material combination, please refer to the variant detail page or contact us to confirm before ordering for heavy-duty applications.
The Stainless Steel bead variant offers meaningful corrosion resistance and is suitable for damp or occasionally wet environments. Carbon Steel variants are best kept in dry indoor settings to avoid rust. Nylon bead units are inherently rust-free at the bead level, but the housing material should also be considered — contact us to confirm housing material for your specific model if corrosion resistance is critical.
The threaded shank size corresponds to the model selected (M5 through M40 range across the CY-12D to CY-40F lineup). To install, drill or tap a hole in your panel or frame to match the thread size, then screw the shank in and secure with the included or separately sourced nut and washer. Ensure the mounting surface is thick enough to engage at least 1.5× the thread diameter for a secure hold. See variant options for the exact thread specification per model.
Yes — this is one of the most popular DIY applications. Mount 4 or more units in a grid pattern on a flat table surface (threaded into the tabletop from below, or through-bolted), and you create a low-friction omnidirectional surface ideal for rotating and sliding panels, sheet goods, or boxes without lifting. The 4 Pcs pack is a cost-effective starting point for a basic workbench build.
Yes. The 4 Pcs pack contains the same ball transfer unit as the 1 Pcs option for the same model and bead material combination — just four of them. Buying the 4-pack typically offers a lower per-unit cost compared to purchasing four individual units separately, making it the better value for full table or conveyor builds.
