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Super Heavy Duty Flat Iron Core Caster 2,500 Kg Loading Rigid / Swivel / Brake 12" × 3" Mining & Quarrying Heavy Fabrication Shops

Super Heavy Duty Flat Iron Core Caster 2,500 Kg Loading Rigid / Swivel / Brake 12" × 3" Mining & Quarrying Heavy Fabrication Shops

Brand Name:	Luma
Model Number:	A01-R-1KU-650
MOQ:	50
Price:	/
Payment Terms:	T/T,D/P,D/A,L/C
Supply Ability:	100000

Detail Information

Product Description

Detail Information

Place of Origin:

China

Temperature Range:

-20°C To 80°C

Finish:

Zinc Plated / Powder Coated

Mounting Type:

Top Plate

Bearingtype:

Ball Bearing

Bearing Type:

Double Ball Bearing

Wheeldiameter:

10" × 3"

Tread Material:

Polyurethane

Wheelwidth:

75mm

Noiselevel:

Low Noise

Sample:

Free

Packaging Details:

bags and cartons

Highlight:

Super Heavy Duty Flat Iron Core Caster

2500 Kg Loading Rigid Caster

Mining Quarrying Heavy Fabrication Caster

Product Description

Super Heavy Duty Flat Iron Core Caster 2,500 Kg Loading Rigid / Swivel / Brake 12" × 3" Mining & Quarrying Heavy Fabrication Shops

A04-1KU "SUPER HEAVY DUTY IMPACT-RESISTANT FLAT IRON CORE CASTER"
SIZE: 12" × 3" (300-12) -- Load Capacity 2,500 kg per caster

Product Overview

This is the largest and strongest model in the A04-1KU Series -- our Super Heavy Duty, Impact-Resistant, Flat Iron Core Caster engineered for loads that push every other caster to its limit.

The 12" × 3" (300-12) model carries up to 2,500 kg (5,512 lbs) on a single wheel -- a combined 10,000 kg (22,046 lbs) system load in a standard four-caster setup. The 75mm wide flat tread creates an exceptionally large contact patch, giving this wheel outstanding stability and floor protection under extreme point loads.

Every caster is manufactured in-house and supplied in three mounting styles: Rigid (Fixed), Swivel and Swivel + Brake -- specify exactly the steering and locking configuration your equipment requires.

Technical Specifications

Parameter	12" × 3" (300-12)
Series / Name	12*3 Super Heavy Duty Impact-Resistant Flat Iron Core Caster
Model (Rigid)	A04-R-1KU-12*3
Model (Swivel)	A04-S-1KU-12*3
Model (Swivel + Brake)	A04-T-1KU-12*3
Wheel Diameter	300 mm (12 inch)
Wheel Width / Tread	75 mm (3 inch) -- extra wide
Wheel Material	Iron Core Polypropylene (PP) -- Cast
Hardness	Shore A 95-98
Load Capacity	2,500 kg (5,512 lbs) per caster
System Load (4 wheels)	≈ 10,000 kg (22,046 lbs)
Bearing	6205 Ball Bearing (precision, sealed)
Overall Height	380 mm
Mounting Bolt Pattern	130 × 130 mm (hole-to-hole)
Bolt Hole Diameter	16 mm
Top Plate Size	160 × 160 mm
Top Plate Thickness	5 mm (heavy duty, reinforced)
Bracket / Fork	Galvanized Steel, 5 mm thick
Bracket Finish	Hot-dip galvanized (corrosion resistant)
Swivel Radius	360° full rotation (swivel types)
Brake Type	Total lock (swivel + wheel lock, brake types)

Material Advantages

A. Iron Core PU Wheel -- Shore A 95-98

Cast PU tread permanently bonded to a solid steel iron core -- the material cannot delaminate under load (unlike glued rubber tyres)
Shore A 95-98 sits at the very top of the industrial hardness scale: it shrugs off cutting, chunking and abrasion from steel shavings, weld spatter, slag and rough concrete
PU is naturally self-lubricating, low-friction and highly resistant to oils, greases, alkalis and most industrial chemicals -- a clear advantage over natural rubber in factory and foundry environments
The flat (zero-crown) tread profile keeps the full 75mm width in contact with the floor for maximum stability and load distribution
Light colour makes contamination and wear easy to spot on the floor

B. The 75mm Extra-Wide Tread -- What Makes This Size Different

(Standard casters use a 50mm wide wheel. Here is why 75mm matters.)

Larger contact patch = dramatically lower floor pressure (PSI). A 2,500kg load is spread over 75mm of tread instead of 50mm, so the wheel will not sink into soft flooring, epoxy coatings, wooden planks or lightweight workshop surfaces -- critical for 10-tonne+ equipment
Superior weight distribution on uneven floors. The wider footprint bridges expansion joints, floor seams, slight surface irregularities and small gaps without the wheel dropping in, protecting both the load and the operator
Outstanding lateral (side-to-side) stability. A wide wheel strongly resists tipping and racking when a heavily loaded trolley is pushed off-axis or turned sharply -- essential for tall, narrow mold carriers, die carts and transformer dollies
Reduced rolling resistance under extreme load. The broad tread deforms less under compression, so the wheel rolls more freely and requires less push force than a narrow wheel carrying the same 2,500kg
Better heat dissipation from the iron core. More tread mass and a larger steel core surface area dissipate the heat generated by continuous heavy rolling faster -- the wheel runs cooler and lasts longer in 24/7 operations
Longer service life. The same total load is shared over a larger tread volume, so wear is distributed and the caster lasts longer between changes -- reducing downtime and replacement cost

C. Galvanized Steel Bracket (5mm Thick)

Hot-dip galvanized finish forms a thick, bonded zinc coating that protects against rust, humidity, cutting fluids and wash-down -- far superior to painted brackets, where paint chips and corrosion starts immediately
5mm thick formed steel plate handles shock loads without bending, cracking or de-welding -- absolutely essential at 2,500kg per caster
Precision robotic welding on every load-bearing joint
The 160 × 160mm reinforced top plate with four 16mm bolt holes spreads mounting stress evenly across the equipment base -- no plate flex, no pull-out, no base damage

D. 6205 Precision Ball Bearing

Large 6205 bearing (25 × 52 × 15mm) selected specifically for heavy radial and impact loads
Sealed construction keeps dust, grit and moisture out while retaining lubrication -- maintenance-free in normal service
Runs smooth and quiet even at the full 2,500kg rating

Application Guide

The 12×3 is the LARGEST in the A04-1KU range -- purpose-built for the HEAVIEST, SLOW-MOVING loads in the toughest environments. Typical uses:

METAL FABRICATION & HEAVY MACHINERY
- Steel plate cutting & welding tables (heavy fabrication shops)
- Steel coil & sheet metal transfer cars (steel service centres)
- Die carts & mold carriers (large) (stamping & die shops)
- Heavy welding positioners (pressure vessel plants)
- Structural steel assembly jigs (bridge & steel works)
DIE & MOLD HANDLING (extra-heavy)
- Large injection mold base trolleys (molding & die plants)
- Die storage & transport racks (over 5T) (automotive stamping)
- Mold changeover carts (large tonnage) (appliance & tooling)
FOUNDRY, FORGING & ROLLING MILL
- Ladle & crucible transfer cars (foundries)
- Ingot & billet handling trolleys (forging plants)
- Rolling mill roll changing carts (steel mills)
- Heavy casting handling bogies (iron & aluminium foundries)
POWER GENERATION & ENERGY
- Transformer & switchgear dollies (large) (substations & utilities)
- Generator & turbine component carts (power plants)
- Wind-turbine nacelle & blade handling rigs (wind energy sites)
- Nuclear & thermal plant maintenance trolleys (power stations)
MINING, QUARRYING & CEMENT
- Crusher & screen maintenance trolleys (mining sites)
- Heavy equipment service stands (open-pit mines)
- Dragline & excavator component carts (mining & quarrying)
- Cement kiln & cooler component carts (cement plants)
SHIPBUILDING & OFFSHORE
- Ship block & section transport bogies (shipyards)
- Heavy component assembly skates (offshore platforms)
- Propeller & shaft handling trolleys (shipbuilding)
RAIL, AVIATION & DEFENCE
- Aircraft engine & landing-gear dollies (MRO hangars)
- Rail bogie & axle maintenance trolleys (rail depots)
- Missile & ordnance handling carts (defence facilities)
CONSTRUCTION & INFRASTRUCTURE
- Precast concrete formwork trolleys (prefab yards)
- Heavy rebar & beam transport carts (construction sites)
- Bridge girder handling systems (infrastructure projects)
- Tunnel-boring & pipe-jacking equipment skates (civil engineering)
WAREHOUSING & LOGISTICS (super-heavy end)
- Coil & roll storage shuttles (paper & steel warehouses)
- Heavy-duty AGV & transfer carts (automated warehouses)
- Container & pallet heavy-load dollies (logistics hubs)

Why Choose the 12" × 3" Size

2,500kg single-wheel capacity -- the MAXIMUM rating in the A04-1KU series. Choose the 12×3 when you need the highest load rating in this family (versus 2,000kg on the 10×3)
380mm mounting height -- the tallest in the range, giving maximum ground clearance for debris, weld slag, floor seams and uneven surfaces
The 75mm wide tread is consistent across the A04-1KU series, so you retain the same stability and floor-protection benefits -- only diameter and capacity step up
Best choice when equipment weight, load centre height or floor conditions demand the ultimate in caster capacity and clearance

Key Features

2,500kg (5,512 lbs) load capacity per caster -- 10,000kg system load

300mm (12") wheel diameter with extra-wide 75mm flat tread

Cast iron core polypropylene tread, Shore A 95-98

Hot-dip galvanized 5mm steel bracket -- corrosion proof

6205 precision sealed ball bearing

160×160mm reinforced top plate, 130×130mm bolt pattern, 16mm holes

380mm overall height

Available: Rigid / Swivel / Swivel + Total Brake

Impact-resistant -- built for shock loads and rough floors

Non-marking, low rolling resistance, maximum service life

OEM/ODM customization welcome

Product Description

Looking for a 12 inch heavy duty caster wheel rated for 2,500kg? The A04-1KU-12×3 super heavy duty iron core polypropylene caster is built for loads that break ordinary wheels. Its extra-wide 75mm flat tread spreads extreme weight across a broad contact patch, making it the top choice for transformer dollies, heavy mold carts, shipbuilding bogies, steel coil cars and other super-heavy equipment. The hot-dip galvanized bracket shrugs off corrosion in foundries, steel mills and outdoor yards, while the 6205 ball bearing keeps things rolling smoothly under full load. Whether you need a fixed caster for straight-line tracking, a swivel caster for tight manoeuvring, or a swivel brake caster for locked positioning, the A04-1KU series delivers.

Frequently Asked Questions

Q1: What is the maximum load per caster?

A: Each 12×3 caster is rated for 2,500kg (5,512 lbs). A standard 4-wheel set therefore supports approximately 10,000kg -- always apply a safety margin and contact us for dynamic (moving) load calculations.

Q2: What is the difference between the 75mm wide wheel and a standard 50mm?

A: The 75mm wide tread creates a much larger contact area, which lowers floor pressure, improves lateral stability, bridges floor gaps and reduces rolling resistance under the same 2,500kg load. It is significantly more stable and floor-friendly than a 50mm wheel.

Q3: Is the bracket galvanized?

A: Yes. The 5mm thick steel bracket and fork are hot-dip galvanized for maximum corrosion resistance, outperforming painted alternatives.

Q4: Can I get this in rigid, swivel and brake versions?

A: Yes -- Model A04-R-1KU-12×3 (Rigid), A04-S-1KU-12×3 (Swivel) and A04-T-1KU-12×3 (Swivel + Total Brake) are all available from stock.

Q5: Do you offer customization?

A: Absolutely. As a professional caster manufacturer with over 10 years of factory experience, we welcome OEM/ODM orders -- see the Custom Order section below.

Custom Order Options

We are a professional industrial caster manufacturer with 10+ years of factory experience. We welcome OEM/ODM orders and can customize any combination of wheel and bracket to your requirements:

Wheel material: PP / PU / TPR / Rubber / Nylon / Phenolic / Forged steel / Cast iron

Wheel hardness: Shore A 70-100 (or D scale for PP/Nylon)

Wheel colour: Any RAL colour

Core / centre: Iron core, aluminium core, no core

Bracket: Galvanized / Stainless 304 / Stainless 316 / Painted

Bracket thickness & top plate size: to your drawing

Mounting type: Top plate / Threaded stem / Bolt hole / Expanding adapter / Central hole

Brake type: No brake / Side lock / Total lock / Direction lock

Bearing: Plain / Roller / 6203 / 6204 / 6205 / 6305 etc.

Load rating: From 100kg up to 1,000kg+ per caster

Special features: Anti-static (ESD), high-temperature, food-grade, explosion-proof, dual-wheel, spring suspension

Send us your drawing, sample or requirement -- we will engineer the right caster for your application.

Product Tags

#HeavyDutyCaster #2500kgCaster #12InchCaster #IronCoreWheel #PolypropyleneCaster #ExtraWideWheel #FlatTreadCaster #ImpactResistantCaster #GalvanizedBracket #6205Bearing #TransformerCaster #MoldCartCaster #ShipbuildingCaster #A041KU #OEMCaster #CustomCaster #IndustrialCasterManufacturer

✔ In Stock | ✔ OEM / ODM | ✔ Factory Direct | ✔ 10+ Years Experience

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products details

Super Heavy Duty Flat Iron Core Caster 2,500 Kg Loading Rigid / Swivel / Brake 12" × 3" Mining & Quarrying Heavy Fabrication Shops

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