5 Inch Horizontal Spring Shock Absorbing Swivel Caster – Orange PU Plastic Core Wheel 250kg Load Cast Iron Bracket & Plate

Custom Industrial Swivel Caster with Lateral Spring Suspension for Automation, AGV Fixtures & Precision Equipment

Upgrade heavy machine mobility with our custom 5-inch (125mm) horizontal spring shock-absorbing swivel caster. Built around an orange polyurethane (PU) tread on a plastic core, a 7mm thick cast iron mounting plate and fork bracket, and a side-mounted lateral spring suspension arm, this caster is engineered to protect expensive industrial equipment from push-pull impact, floor gaps, and start-stop vibration—without damaging epoxy or cleanroom floors.

Model Type:​ Swivel / Activity Caster (Custom)

Wheel Diameter:​ 5 inch / 125 mm

Load Capacity:​ 250 kg per caster (static/dynamic rated for industrial duty)

Wheel Material:​ Orange PU tread on plastic core (quiet, non-marking, lighter than steel core)

Suspension:​ Horizontal / lateral spring-loaded swing arm

Mounting Plate & Bracket:​ 7mm Cast Iron​ (superior rigidity, anti-twist, vibration damping)

Bearing:​ Precision roller bearing (standard; customized on request)

Braking:​ Optional total lock / directional lock (custom)

OEM/ODM:​ Yes – send drawings and requirements, we reply within 12 hours.

Key Features

• Orange PU on Plastic Core Wheel​ – Non-marking, low-noise, floor-safe tread that resists abrasion and chemicals commonly found in factories. The plastic core reduces overall weight compared with iron-core wheels while maintaining structural strength.
• Cast Iron Bracket & 7mm Cast Iron Top Plate​ – Unlike stamped steel or galvanized plates, cast iron provides exceptional rigidity, high compressive strength, and natural vibration damping. It resists bending, twisting, and fatigue under heavy side loads, making it ideal for demanding industrial machines.
• Horizontal (Lateral) Spring Suspension​ – Unlike vertical compression springs, the side-mounted spring works with a swing-arm fork to absorb horizontal, diagonal, and rotational shocks when the machine is pushed, pulled, or turned.
• Full Swivel (Activity) Head​ – Smooth 360° steering for tight aisles, machine positioning, and AGV/robot docking maneuvers.
• Heavy Duty Sealed Bearings​ – Keeps rolling resistance low even under sustained 250kg class loads.
• Customizable​ – Top-plate dimensions, bolt holes, kingpin, brake style, spring rate, and PU hardness can be adjusted to your machine base.

Spring System Advantage – Why Horizontal / Lateral Spring?

Standard vertical springs mainly handle up-and-down compression. Our lateral spring-loaded swing arm​ is designed for industrial swivel dynamics:

1. Absorbs multidirectional impact​ – Protects equipment when crossing expansion joints, floor seams, thresholds, or during AGV/trolley acceleration and deceleration.
2. Reduces vibration transfer​ – Isolates sensitive sensors, optics, battery modules, and fixtures from ground shock.
3. Helps wheel return to neutral​ – Keeps the caster stable after swiveling or side-loading.
4. Low-profile installation​ – Mounts horizontally inside the cast iron fork/yoke area, preserving low machine clearance and a low center of gravity.
5. Extends wheel and floor life​ – Soaks up energy instead of transmitting metal-to-floor shock.

Technical Specifications (Standard / Custom Baseline)

Note: For exact overall height, plate size, and offset, please request the drawing or send your own.

Why the Spring Is Horizontal (Side-Mounted), Not Vertical — by Design

1. Absorbs Forward/Reverse and Turning Shocks — Not Just Up/Down

A vertical spring mainly handles vertical load cushioning.

This horizontal spring is mounted on the yoke / fork-arm side. When the machine meets floor joints, small bumps, or during push-pull and start-stop movement, the wheel fork tends to pivot/swing around the axle. The horizontal spring provides rebound and damping to absorb horizontal / angled impact, while helping the wheel set return to position.

2. More Compact Structure, Lower Mounting Height

On a 5-inch wheel, under-machine clearance is often limited. A vertical spring would take up overhead space or raise the installed height. The horizontal spring sits inside / on the side of the fork, keeping a low center of gravity and a low installation profile — ideal for machines with tight bottom clearance.

3. More Direct Load Path, Better Fork Rigidity

The main load is carried by the wheel axle, fork arms, swivel head, and cast-iron top plate. The spring’s job is “float / cushion / compensation,” not holding the full weight alone. Working with the rocker/yoke structure, the force concentrates on the thick fork and plate, so the 250 kg-class rating stays stable.

4. Swivel Casters Must Handle Steering and Swing

A swivel caster deals with turning, return-to-center, and side loads. The horizontal spring handles the combined shock from steering, yaw, and uneven floors more smoothly, reducing binding and metal-to-metal harshness.

5. Protects the PU-on-Plastic-Core Wheel and the Machine

The horizontal rocker-spring lets the wheel “give and settle” before returning to position, reducing instant shock transfer to the equipment. The PU tread itself is quiet and floor-safe. Together, it is a true shock-absorbing caster logic.

Simply put:​

Vertical spring = up/down compression buffer.

This horizontal spring = rocker-arm / horizontal-spring shock absorption — for heavy-load swivel use, low-height installation, and resistance to push-pull plus floor unevenness.

Commonly used on: automated tooling carts, inspection / production-line equipment, heavy-duty mobile bases, etc.

English product label:​

Horizontal spring suspension / side-mounted spring shock-absorbing swivel caster

Industrial Application Scenarios (Where It Fits Best)

This caster is not for light furniture—it is built for heavy industrial mobility and light vibration isolation.

1. Automation & AGV Systems

• AGV docking/transfer trolleys
• AMR (Autonomous Mobile Robot) charging/load platforms
• Conveyor line changeover carts
• Automated work-in-process (WIP) fixtures

Benefit: Dampens start-stop inertial shock during robot docking and manual repositioning.

2. Inspection, Metrology & Vision Equipment

• Coordinate Measuring Machine (CMM) auxiliary stands
• Optical inspection stations
• Machine vision lighting/fixture bases
• Laser alignment and gauging carts

Benefit: Reduces floor-induced vibration that can affect measurement repeatability.

3. New Energy / Battery Manufacturing

• Lithium-ion battery module assembly carts
• Battery pack test fixtures
• Cell sorting and handling trolleys
• EV powertrain component staging platforms

Benefit: Clean-look PU protects epoxy floors in high-value production areas; spring action protects delicate fixtures.

4. Packaging, Printing, Laser & Converting Machinery

• Laser cutting machine support bases
• Digital printing press auxiliary tables
• Labeling and coding machine movable stands
• Packaging line adjustment carts

Benefit: Handles repeated movement and minor floor irregularities on the shop floor.

5. Tooling, Mold & Heavy Fixture Carts

• CNC tooling carts
• Stamping die/mold change trolleys
• Welding jig and fixture bases
• Maintenance and calibration equipment stands

Benefit: 250kg capacity with rigid cast iron plate supports dense, low-center-of-gravity loads.

6. Laboratory / Cleanroom / Medical Device Production (light-industrial)

• Heavy lab instrument carts
• Cleanroom material handling trolleys
• Medical device assembly platforms​ (non-sterile, non-corrosive environments)

Benefit: Non-marking PU, low noise, controlled roll.

Typical Facilities / Places

• Automotive and EV battery plants
• Electronics & semiconductor light-assembly areas
• Precision machining and metrology rooms
• Packaging and converting factories
• Warehouses with epoxy/coated concrete floors
• Automated storage/line-side supermarkets

Customization – Send Us Your Drawing & Requirements

We specialize in custom/OEM industrial casters. If you have a specific machine base, unusual top-plate pattern, brake requirement, or need a different spring rate / PU hardness / bearing setup, tell us.

Please send:

• Technical drawing / CAD (PDF/DWG/STEP acceptable)
• Top-plate dimensions and hole pattern
• Required load per caster and total cart/machine weight
• Wheel diameter and tread material preference
• Brake type (none / total lock / directional)
• Operating environment (floor type, temperature, chemicals, ESD need)
• Quantity and target lead time

We will reply within 12 hours​ with feasibility, drawing confirmation, and quotation.

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Call to Action

Looking for a custom 5 inch horizontal spring shock-absorbing swivel caster with cast iron bracket and plate​ for your machine or automated trolley?

Send us your drawing and requirements today — we respond within 12 hours.

[Contact Us / Request a Quote / Download Drawing Template]

Product photo caption idea: 5" orange PU plastic-core wheel with horizontal spring suspension, mounted on 7mm cast iron fork and top plate – custom built for heavy industrial equipment mobility.