Low Profile Castors: EF12 Low-Centre-Gravity Plate Series (2½”, 150 kg)

When a cart sits low, a standard swivel caster eats up the mounting height you do not have. The bracket sticks above the wheel, the chassis sits higher, and the centre of gravity climbs back up — exactly what you were trying to avoid.

The EF12 family is a low-centre-of-gravity plate castor built to keep the equipment body close to the floor without giving up load capacity. The 2½-inch ball-bearing swivel is the general-purpose model in the range, and the full 1½ to 3-inch ladder below carries every mounting dimension from the specification sheet.

Who Makes These

Foshan Global Caster Co., Ltd, Guangdong, China has manufactured castors and wheels since 1988. The plant covers about 156,000 m² with 500-plus staff and in-house stamping, injection moulding and PU pouring, outputting roughly ten million casters a year. The catalogue holds 21,000-plus models, 600-plus of them as standing stock, certified to ISO 9001 and ISO 14001, with over 100 patents. The EF12 line is built on that in-house stamping and moulding, not sourced and relabelled.

Flagship Model: EF12-11-065S-101

This is the 2½-inch (65 mm) swivel, high-grade low-profile nylon tread on a ball bearing, blue-zinc pressed steel fork, top-plate mount. It is the size most platform trucks, airport dollies and low mobile stands land on.

Item	Specification	Picture
Swivel SKU	EF12-11-065S-101
Wheel diameter × width	65 × 40 mm
Load capacity	150 kg per wheel
Tread	Low-centre-of-gravity high-grade nylon
Bearing	Ball bearing
Mounting height	93 mm
Swivel radius	57 mm
Top plate	94 × 67 mm
Hole spacing	73 × 45 mm
Hole diameter	9 mm

EF12-11-065R-101（Rigid counterpart）	EF12-11-065SC-101（Side-brake swivel）	EF12-11-065M-101（Threaded-stem swivel）

Full Size Ladder — Top Plate

Same low-profile fork family across the range. The 1½ and 2-inch sizes use a plain bore; the 2½ and 3-inch sizes step up to a ball bearing. All plate variants ship as swivel (S), rigid (R) or swivel with side brake (SC) on the same plate footprint.

Stem Mount Option

For equipment built around a threaded hole rather than a plate, the same 65 mm wheel ships on a stem: EF12-11-065M-101 swivel and EF12-11-065MC-101 swivel with side brake, stem 12 × 25 mm, mounting height 96 mm, swivel radius 57 mm. The 40, 50 and 75 mm sizes also have stem variants in the catalogue.

What You Are Pay For Under the Skin

Low bracket, wide footprint
The fork is shaped so the wheel sits under the chassis rather than towering over it. The wider plate spreads the point load, which keeps the bracket true under repeated loading and keeps the equipment body low enough to pass under conveyors or shelves.

High-grade nylon tread
The nylon wheel rolls on sealed concrete, tile and steel plate, and stands up to oil and grease contact that would soften softer treads. It is firmer than polyurethane, so it is noisier on hard floors — match the tread to your floor before ordering.

Bearing matched to the size
The two smaller sizes use a plain bore for light, infrequent movement. The 2½ and 3-inch sizes move to a ball bearing, which starts rolling with less force and holds up to daily push traffic.

Side brake on the steering corners
The SC variant applies a side brake to the rolling wheel. It holds the cart at a work cell; it does not lock the swivel raceway. For carts that must run a straight line without wandering, pair rigid castors at the trailing end instead.

Worked Load Example

A low mobile stand carries a 320 kg load plus frame. Four castors: 320 ÷ 4 = 80 kg per wheel. The 2-inch plain-bore model at 100 kg per wheel clears it; the 2½-inch ball-bearing at 150 kg clears it with headroom for a bumped threshold and daily push traffic. We would pick the 2½-inch where the stand moves all day, and the 2-inch for light, occasional movement.

If your cart runs above 800 kg total, this medium-duty family is not the right bracket — move up to a heavy-duty plate series rather than running four 3-inch wheels past their 200 kg rating.

Where These Belong

● Low platform trucks and warehouse dollies that need to stay under racking.
● Airport and baggage equipment with a restricted chassis height.
● Mobile work stands and instrument carts on smooth factory floors.
● Retail display fixtures and low machinery bases.

When To Pick Something Else

1.If your load is below 50 kg per wheel, the 1½-inch model covers it and the larger sizes are unnecessary.

2.If the floor is fragile epoxy and noise matters more than abrasion, a polyurethane tread from another family rolls quieter than this nylon wheel — tell us the floor and we point you to the right line.

FAQ

How many castors should my cart have?
Four for symmetric loads. For long or offset equipment, six distributes the load more evenly over uneven floors.

Swivel or rigid on which corners?
Two swivel at the steering end and two rigid at the trailing end for hand-pushed carts. Four swivels, two of them braked, for equipment repositioned in tight cells.

What is the mounting height of the 2½-inch model?
93 mm on the plate mount, 96 mm on the threaded stem. Confirm this against your chassis clearance before ordering.

Does the side brake lock the swivel too?
No. The SC brake locks the rolling wheel only. For a fixed straight-line travel, use rigid castors or a dedicated direction-lock variant from our catalogue.

Can you customise the plate or tread?
Plate and stem dimensions above are standard. Other hole patterns or tread options go through OEM/ODM; send the drawing and we confirm feasibility before quoting.

Lead time and warranty?
One-year warranty under normal use; standard lead time about 30 days, with 600-plus catalogue models held as stock. We reply with a quote and a 2D drawing for the exact SKU you select.