Spring Casters That Take the Hit So the Load Doesn’t
a rigid caster passes every floor joint, threshold, and pothole straight into the load. a coil spring in the fork lets the wheel travel and absorb the impact — on PU-on-cast-iron wheels, 4″–8″, for heavy-duty and towed equipment.
On a hard floor with joints, thresholds, and the odd pothole, a rigid caster has nowhere to put the shock — so it goes straight up into the cart and whatever it carries. our shock-absorbing casters put a coil spring in the fork: when the wheel meets an edge, the spring compresses and lets the wheel travel, so the impact is soaked up instead of passed to the load.
The wheel underneath is a polyurethane tread on a cast-iron core — it carries the weight, rolls easily, and protects the floor while the spring handles the bumps. sizes run 4″ to 8″ (about 100–200 mm), and precision dual ball bearings keep starting and rolling effort down by 15–20% even on a loaded trolley.
Spring choice follows the load: single-spring forks for lighter, steadier weights and double-spring forks for heavier loads and rougher ground. the key is to keep the working load below the rated capacity so the spring still has travel to cushion. forks come zinc-plated or in a baked finish, the range meets ANSI/ICWM and ISO 22883 requirements, and bespoke spring rates follow a 24–48h drawing path.
Shock-absorbing caster range
Single & double coil spring · PU on cast iron · 4″–8″ · zinc-plated & baked finishes.
Single-Spring · PU on Cast Iron
One heavy coil spring with a PU-on-cast-iron wheel, 4″–8″, for logistics and warehouse carts.
Double-Spring · Baked Finish
Twin coil springs give extra travel for heavier loads; durable baked paint finish.
Double-Spring · Heavy Build
Heavier double-spring build for rougher ground and higher rated loads.
125 mm Spring Swivel
Compact 125mm swivel spring caster for tighter heavy-duty trolleys.
Spring & finish selection
Match the spring to the load and the finish to the environment.
| Option | What it gives | Best for |
|---|---|---|
| Single-spring fork | Cushions moderate impacts; steadier feel | Lighter, steadier loads on mostly even floors |
| Double-spring fork | More travel and support | Heavier loads and rougher, uneven ground |
| PU on cast-iron wheel | Carries load, rolls easily, protects floor | All shock-absorbing builds |
| Zinc-plated finish | Everyday corrosion resistance | Workshop and indoor use |
| Baked paint finish | Tougher coated finish | Dock, outdoor, and high-impact use |
Where they earn their keep
Carts over joints & thresholds
Loaded trolleys crossing dock plates, floor joints, and door thresholds, where rigid wheels jolt the stack.
Tugger trains & AGVs
Towed trains and automated guided vehicles that run continuously and need a settled load over imperfect floors.
Yard & outdoor moves
Machinery and equipment moved across uneven yard, dock, and outdoor surfaces.
Custom engineering & your brand
Spring rate matched to your load, sized and finished to your spec, shipped under your brand.
24–48h drawing path
send your load, size, and mount; we confirm a drawing within 24–48h, with roughly 12-day mould work for bespoke parts.
Spring rate to spec
spring rate selected so the working load sits below rated capacity and the spring keeps its travel. finish to zinc-plated or baked.
OEM & neutral packaging
we laser-etch or pad-print your logo or ship unbranded, with neutral cartons by default and custom-printed boxes to your artwork.
Mixed-load stocking & container logistics
Stock range coverage without committing a full container to one model.
| Term | How it works |
|---|---|
| Mixed-load container | Consolidate shock-absorbing, heavy-duty, and other caster types into one container. |
| Per-model minimum | Held at distributor scale with no mass-OEM constraint, so you carry depth across springs, sizes, and finishes. |
| Container loading | we plan cartons per container to fill cube and weight efficiently. |
| Lead time | Standard models from stock; custom spring rates, sizes, or finishes follow 24–48h drawing and roughly 12-day mould work, typically about 14–21 days for bulk OEM. |
| Trade terms | FOB and CIF supported. confirm port, Incoterm, and per-model quantities on your quote. |
Related ranges
Round out a mixed-load order with matched heavy-duty ranges.