Spring shock absorbing casters — iron-core PU.
A dual spring pack in the fork absorbs what the floor throws at the load: dock plates, expansion joints, thresholds, rough yards. Iron-core PU wheels, 100 to 200 mm, at 300 to 450 kg per caster.
Specification
| Series | Spring shock absorbing casters — dual spring pack |
|---|---|
| Wheel | Polyurethane tread on cast iron core, 100–200 mm × 50 mm |
| Load capacity | 300–450 kg per caster by size — see the size table |
| Suspension | Dual spring pack in the fork |
| Mounting | Top plate 140 × 110 mm, hole spacing 105 × 75 mm, hole Ø 13 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.
Shock is a load multiplier. A caster rated exactly for the static weight sees two or three times that figure for the instant it drops off a dock plate — and the cargo sees it too. This series puts a dual spring pack in the fork: the wheel deflects on impact, the peak load is spread over time, and both the caster and the load survive floors that would destroy a rigid fork's bearings in a season.
The overall height is tabled as the range the series prints, spanning the rigid and swivel builds of each size — the spring pack makes these tall casters, so check the height against your equipment's mounting envelope before sizing. This is the first product series of our shock absorbing line.
Sizes in this series
| Size | Wheel Ø × width | Load per caster | Overall height range | Top plate | Hole spacing | Hole Ø |
|---|---|---|---|---|---|---|
| 4 in | 100 × 50 | 300 kg | 176–196 mm | 140 × 110 | 105 × 75 | 13 |
| 5 in | 125 × 50 | 350 kg | 188–208 mm | 140 × 110 | 105 × 75 | 13 |
| 6 in | 150 × 50 | 400 kg | 200–220 mm | 140 × 110 | 105 × 75 | 13 |
| 8 in | 200 × 50 | 450 kg | 240–260 mm | 140 × 110 | 105 × 75 | 13 |
Overall height is stated as the printed range spanning the rigid and swivel builds of each size; the quotation confirms the exact height for your build. 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
- Swivel and rigid builds; the swivel build suits the steering end of shock-exposed carts.
- For the same wheels without suspension, see the iron-core PU extra heavy duty series.
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
When is a spring caster worth it?
When the route crosses dock plates, rails, thresholds or broken yard concrete under load — or when the cargo is shock-sensitive (instruments, glass, calibrated equipment). On smooth indoor floors it buys nothing.
Does the spring change the load rating?
The ratings in the table are for the suspended build as supplied. Do not carry over ratings from the un-suspended series — the fork and spring pack are the product.
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.