4 inch heavy duty PU swivel caster with brake.
The lead model of the heavy duty line: a 100 x 50 mm polyurethane-on-cast-iron wheel on a swivel fork with a total-lock brake, built for carts and equipment that work all day and park anywhere.
If a distributor could stock only one heavy duty caster, this would be the shape of it. The 4 inch (100 mm) wheel is large enough to roll loaded carts over joints and thresholds without drama; the polyurethane tread protects floors and runs quietly; the cast iron core carries the load; and the brake locks both the wheel and the swivel, so a parked cart on a sloped dock stays parked. It is the configuration our heavy duty line is anchored on, and the first model most private-label ranges are built around.
The specification discipline matters more than the headline size. This model is quoted with its wheel width range, tread hardness, bearing type and fork thickness stated — because a 4 inch caster with a soft tread and a plain bore is a different product wearing this one's photograph. The sample is measured and tested against the stated specification before your bulk order is produced.
Specification
| Wheel diameter | 4 in (100 mm) |
|---|---|
| Wheel width | 2 in (50 mm) |
| Wheel | Polyurethane tread on cast iron core |
| Configuration | Swivel with total-lock brake (locks wheel and swivel) |
| Load capacity | Confirmed per order in the written quotation; verified by sample load test per EN 12532 / ANSI ICWM conventions |
| Mounting | Top plate — plate size and bolt hole pattern confirmed per order |
| Bearing | 6203 ball bearing |
| Fork finish | Zinc-plated (galvanized) steel |
| 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.
Configuration options
- Rigid and unbraked swivel versions of the same wheel — see the 4 inch rigid companion.
- Bearing alternatives (roller bearing for maximum capacity) quoted against the same fork.
- Private label: fork or hub branding, your packaging and carton marks under the OEM programme.
- Mixed-container loading with the 6 inch and 8 inch heavy duty models.
What the sample verifies
Before bulk production, the production sample of this model is checked against the locked specification: wheel diameter and — critically — wheel width measured, tread hardness verified, bearing type confirmed, fork and plate thickness 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 specification
About this model
Does the brake lock the swivel as well as the wheel?
Yes — this model is specified with a total-lock style brake that locks both wheel rotation and swivel movement. If you need a wheel-only brake, say so in the RFQ; it is a different brake and is quoted as such.
What plate pattern does it use?
The plate size and bolt hole spacing are stated dimensions on the quotation. If your equipment is drilled for a specific pattern, send it and the quotation will lock to it.
Can I pair this with rigid casters on the same cart?
That is the standard layout — two of these braked swivels at the steering end, two rigids at the other. The rigid companion shares the wheel and plate standard.
How is the load capacity verified?
By load testing the production sample per the stated convention, alongside dimensional checks (including wheel width) and hardness verification. The capacity for your configuration is stated on the quotation, and the approved sample anchors the bulk order.
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.