Lean tube expanding stem casters.
The caster that finishes a pipe-and-joint rack: an M12 stem wrapped in a rubber sleeve that expands inside the tube and locks the caster in. For lean manufacturing racks, flow shelves and FIFO carts.
Specification
| Series | Lean tube casters — expanding stem |
|---|---|
| Wheel | 75–125 mm × 32 mm — ten wheel options, see below |
| Load capacity | 100–130 kg per caster by size — see the size table |
| Configurations | Swivel; swivel with brake |
| Mounting | Expanding stem M12 × 60 with rubber sleeve Ø22 × 50; fits tube inside Ø 22–25 mm |
| Documentation | CE / RoHS documentation available on request — ask in the RFQ and the documents for this series accompany the quotation. |
| MOQ | Confirmed per order in the written quotation |
| Lead time | Confirmed per order in the written quotation |
Values marked as a class or target are the specification this model is quoted and sampled against. Final confirmed values are stated on the written quotation and verified on the production sample before bulk production.
Lean tube systems — the 28 mm pipe-and-joint construction used for production racks, flow shelves and supermarket carts in lean manufacturing — need a caster that mounts inside the tube itself. This series' stem carries a rubber sleeve: inserted into the tube end, the sleeve expands and grips the bore, anchoring the caster without brackets or drilling.
The fit range is tabled: tube inside diameter 22–25 mm, sleeve Ø22 × 50 on an M12 × 60 stem. The wheel is the buyer's choice from the widest option list in the range — plain and thread-guard builds across PU, TPR, nylon, anti-static, conductive and iron-core PU — because a rack's caster has to suit its floor and its load, not the catalogue's convenience.
Sizes in this series
| Size | Wheel Ø × width | Load per caster | Overall height |
|---|---|---|---|
| 3 in | 75 × 32 | 100 kg | 112 mm |
| 4 in | 100 × 32 | 120 kg | 136 mm |
| 5 in | 125 × 32 | 130 kg | 156 mm |
Dimensions in millimetres unless shown otherwise. Values are the series table values; the written quotation confirms the final drawing for your size class before sampling.
Configuration options
- Wheel options: yellow PU with thread guards, black TPR with thread guards, white nylon with thread guards, maroon PU with thread guards, anti-static, conductive, iron-core PU, maroon PU, white nylon, grey TPR.
- Thread-guard builds keep string, film and fibre out of the bearing — the default choice for production floors.
- Brake builds for racks that park on sloped floors.
What the sample verifies
Before bulk production, the production sample of this series is checked against the locked specification: wheel diameter and — critically — wheel width measured, tread hardness verified where the series states it, bearing type confirmed, fork and plate dimensions measured, and load performance tested per the stated convention (EN 12532 / ANSI ICWM). The approved sample becomes the reference for the shipment, and the order carries batch traceability back to it.
Request pricing for this series
About this series
Will it fit my tube?
If your tube's inside diameter is 22–25 mm — the standard lean tube bore — yes. Measure the bore, not the outside: outside diameter varies by tube wall and coating.
How strong is the expanding fit?
The sleeve expands across a 50 mm length of bore — it is a structural friction lock, and the caster's load rating assumes it. Do not use the stem in an oversized or damaged bore.
Need this caster under your own brand?
Private label, custom packaging and carton marks are available across the range — mention it in the RFQ and the quotation will include the branding steps.