Caster and wheel terminology and definitions, including a diagram of a wheel assembly.

Algood Casters Limited • Canada's Largest Castor Manufacturer

Caster Nomenclature

ALGOOD Nomenclature

	Swivel Caster A Swivel Caster has a swivel yoke and wheel assembly that will allow rotation of 360 degrees, which permits movement in any direction.	Swivel Radius A Swivel Radius is the horizontal distance from vertical centerline of kingpin to outside edge of wheel tread. Specifies minimum clearance required for mounted caster to swivel 360 degrees.
	Rigid Caster A Rigid Caster has a rigid yoke and wheel assembly which permits only straight-line movement.	Swivel Lead Swivel Lead is the horizontal distance between vertical centerlines through kingpin and wheel center.
	Overall Height Overall Height is the vertical distance between floor and mounting plate. (NOTE: Casters with threaded stems are measured to the top washer and do not include the length of the threaded stem).	Wheel Diameter Wheel Diameter is the outer nominal diameter of the wheel.
	Tread Width Tread Width is the outer surface of the wheel, in contact with the ground.	Hub Length Hub Length is the widest part of the hub (including bearing assembly and thread guards).
	Bore Diameter Bore Diameter is the distance measured through the center of the wheel.	Plate Dimension Plate Dimension is the measured distance from one edge of the top plate to the opposite side and the distance from the other edge of the top plate to the opposite side.
	Bolt Hole Bolt Hole spacing is the distance measured from the center of the bolt hole to the opposite center of the other bolt hole.

Wheel Assembly

Algood Casters Limited
605 Fenmar Drive • Toronto, Ontario • Canada • M9L 2R6
Phone: 416.749.7743 • Fax: 416.747.5671
Toll Free: 800.ALGOOD.3 • 800.254.6633
service@algood.com