Caster Model 4A – Plate Mount

Caster Model 4A is intended for use in institutional applications of up to 1,200 Lbs on a set of four casters. These casters are a slightly heavier version of our Model 3 shown on this page.

As with all lighter duty casters the steel swivel and rigid frames are not designed to withstand shock loads, impact or abuse. If your application involves that type of environment select from our broad selection of industrial casters starting with Model 9 rated for 900 Lbs per caster. Model 4A, Model 3 and K3 are stampings. They are designed for intermittent usage only on manually moved equipment. In production applications where equipment is moved about frequently in less than an ideal operating environment select from one of our many industrial casters.


  • Swivel frames have double ball bearing hardened raceways for longer service.
  • A slightly stronger caster frame than Model 3 but with the same small mounting plate.
  • Larger wheels, all 2″ wide, provide increased capacity and stability.
  • Precision Sealed Ball Bearings in all wheels for easier rolling.
Mounting Plate – 2 3/8″ x 3 5/8″
This image is for Plate Size and Hole Placement ONLY. IT DOES NOT DEPICT THE ACTUAL PLATE.
We suggest that you do NOT drill the mounting holes to attach the casters until you receive them.
We do NOT include mounting Hardware.
You should never select on the basis of load capacity alone. There is no industry standard for load capacity ratings and they may not include a factor for abuse. Our capacity ratings are below what the casters are capable of carrying because most applications have less than perfect conditions. Please refer to the information shown at the bottom of this page. If you have any doubt as to which wheel or caster is the BEST choice for your application contact us for a recommendation.

CALL US AT 800-501-3808

Typical Applications
Workbenches - Shop Equipment - Movie & Soundstage Equipment - Hospital / Medical Equipment
Computer Equipment Stands and Mobile Workstations - Electronics & Diagnostic Equipment
  • Swivel Construction - Stamped steel. Swivel has double ball bearing.
  • Center Pin - 1/2" diameter steel rivet.
  • Axle - 1/2" diameter bolt with lock nut.
  • Finish - external metal parts are Zinc plated.
  • All wheels have precision sealed ball bearings ( PS ) .
Optional Features:
Wheel Brake - Order as Option in Shopping Cart

Pedal on Side of Wheel
TL - Total Locking Brake Now Available
Wheel Brakes are not designed to hold on inclines.
Caster Photos are with 6" Wheels - 4", 5" and 6" are available.

Gray Soft Rubber
Swivel Caster

Gray Soft Rubber
Rigid Caster

Crown Gray Soft Rubber
Swivel Caster

Super Cushion Rubber
Swivel Caster

Polyurethane on
Glass-Filled Nylon
Swivel Caster

Polyurethane on
Polyolefin Blue/Black
Swivel Caster

Polyurethane on
Polyolefin Blue/Black
Rigid Caster

Polyurethane on
Polyolefin Maroon/Gray
Swivel Caster

Polyurethane on
Polyolefin Maroon/Gray
Rigid Caster

Black Polyolefin
Swivel Caster
We do NOT include mounting Hardware.
Click on the Part Numbers for Pricing, Options and to ORDER.
Click here
to compare
wheel materials.

Click Part Numbers Below
For Price and to Order


Wheel Tread Material
Click to see Wheel
Swivel Caster Rigid Caster
Buy it Now Buy it Now
4" 2" Gray Soft Rubber, Flat PS 250 4ARF4x2-S 4ARF4x2-R 4 5 1/4"
Poly on Glass-Filled Nylon PS 300 4AUG4x2-S 4AUG4x2-R 5
Polyurethane - Blue/Black PS 300 4AUP4x2-S 4AUP4x2-R 5
Polyurethane - Maroon/Gray PS 300 4AMG4x2-S 4AMG4x2-R 5
Polyolefin ( Black ) PS 300 4APB4x2-S 4APB4x2-R 3 1/2
5" 2" Gray Soft Rubber, Flat PS 250 4ARF5x2-S 4ARF5x2-R 5 6 3/8"
Poly on Glass-Filled Nylon PS 300 4AUG5x2-S 4AUG5x2-R 6
Polyurethane - Blue/Black PS 300 4AUP5x2-S 4AUP5x2-R 6
Polyurethane - Maroon/Gray PS 300 4AMG5x2-S 4AMG5x2-R 6
Polyolefin ( Black ) PS 300 4APB5x2-S 4APB5x2-R 4
6" 2" SUPER CUSHION Rubber PS 300 4ACB6x2-S 4ACB6x2-R 6 7 1/2"
Gray Soft Rubber, Flat PS 300 4ARF6x2-S 4ARF6x2-R 5 3/4
Gray Soft Rubber, Crown PS 300 4ARD6x2-S 4ARD6x2-R 5 3/4
Poly on Glass-Filled Nylon PS 300 4AUG6x2-S 4AUG6x2-R 7
Polyurethane - Blue/Black PS 300 4AUP6x2-S 4AUP6x2-R 7
Polyurethane - Maroon/Gray PS 300 4AMG6x2-S 4AMG6x2-R 7
Polyolefin ( Black ) PS 300 4APB6x2-S 4APB6x2-R 5

Deduct 1 lb. for weight of rigid caster.

Use the Polyolefin ( Industrial Plastic ) wheel for "Standing Loads". Polyolefin wheels eliminate the possiblilty of a flat spot developing if the castered equipment is left parked for a prolong period.

You should never select on the basis of load capacity alone. Capacity ratings do not take into account the effort required to manually move a load. Capacity ratings are based on manual operation under ideal conditions. These casters are not to be moved by mechanically powered equipment.