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Wheel Tread
Top Lock
Brake
Pedal Break
Rectangular
Top plate
Square Top
plate
Threaded
Stem
Square
Grip Ring
Stem
Round
Stem Grip Ring
Stem Octagon
Stem
Rubber
Expanding
Stem
Pipe
Stem
Axle with
Zerk Fitting
Bearing
Race
Wheel
Hub
Dust
Cover
Rig
Basic Caster Parts
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Main Load
Bearing
Leg
Horn Base
Horn
Zerk Fitting for
Lubrication
Axle Mounting
Holes
Standard Axle
Bolt
Axle Nut
Spanner Bushing
Caster Terminology Mounting
Top Plate
Bolt Holes Bolt Holes
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B
A
D
C
B – TREAD WIDTH
Wheel width measured at the tread.
A – SWIVEL RADIUS
Distance measured horizontally from the
center of the kingpin to the trailing edge of
the wheel.
C– WHEEL DIAMETER
Distance measured across the
diameter of the wheel.
D – OVERALL HEIGHT
Vertical distance measured from
the floor to the top of the
mounting plate.
Offset Kingpin
Caster Measurements
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Cushion or
Hard Rubber
Conductive
Rubber
Cushion or
Hard Rubber
W/Side Plates
Advantage™
TPR Round
and Flat
Advantage™ Heat
Round and Flat Red
Advantage™ Health
Antimicrobial Flat
Tread
Welded Disc Blue Poly,
Black or Grey Rubber
Polyolefin Phenolic Polyloc™ Grey
and Blue
High Temp
Resin
Moldon
Rubber/
Aluminum
Core
Moldon
Rubber/ Cast
Iron Core
Advantage™
TPR Flat
Advantage™
TPR Round
Advantage™
TPR HD Flat
High Modulus
Rubber Donut
Polyloc™ Grey Polyloc™ Blue
Moldon
polyurethane/
Aluminum
Core
Moldon
Polyurethane/
Cast Iron Core
Phenolic Polyolefin
Triton
Enhanced
Polypropylene
Solid
Elastomer V-Groove Cast Iron
Basic Wheel Types
Note: Please See “Caster Wheels”
Section for Complete Descriptions and
Details on Available Wheels.
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Top Lock Brake Assembly
Caster Part Overview
Wheel Axle
Ball Bearings Roller Bearings Precision Ball Bearings
Pedal Lock Brake
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Spanner Bushings Delrin Bearings Corner Bumpers
Caster Dock Floor Truck Locks Caster Swivel Lock
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Basic Fastening Types
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Typical Caster Plates
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Caster Rigs
Kingpinless Swivel Top Plate Swivel Top Plate Swivel W/Brake
Threaded Stem Swivel Threaded Stem Swivel W/Brake Pipe Stem Swivel
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Rubber Expanding Adaptor Grip Ring Stem Round Stem
Square Stem Single Piece Rigid Welded Rigid
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Metal Ball Hooded Metal Ball Medical
Twin Wheel Stem Twin Wheel W/Lock Pneumatic Swivel
Furniture and Medical Casters
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Side Lock Brake Total Lock Brake Top lock brake
Caster Brakes
Truck Floor Lock Swivel Lock Adjustable Stabilizer