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Caster Information.

Caster & Wheel Terminology.

Adjustment Style how the leveling pad is adjusted on a leveling caster; options include manual thumb wheel, manual ratcheting handle and a nut for an open-ended wrench

Brake the presence of a stopping mechanism

Brake Type the specific type of brake on a caster; either directional, double-sided, face, face contact, pedal, poly cam, side, side top, single side, tech, top, total or tread lock

Brand the manufacturer of the caster and/or wheel

CE Mark a required conformity marking for products sold within the European Economic Area

Country of Origin where the caster and/or wheel was manufactured

Dynamic Capacity the total load that ONE caster is capable of moving on a continuous basis

Face the shape of the wheel’s face

Greaseable Axle an axle with a hole in it; used to insert grease and lubricate the bearing

Hub Type the design of the wheel’s core material; solid, spoke, spoked, solid-dished

Inside Bolt Spacing the distance between the centers of adjacent boltholes

Kingpinless a rig constructed without a bolt (i.e. kingpin) attaching the top plate to the rig

Leveling Height the distance available for a leveling caster to change the load’s height

Mounting Type one of three styles of attachment that a caster may have; either top plate, stem or less mounting; both stems and top plates come in various sizes and shapes

Non-marking whether or not the caster wheel tread will leave marks on flooring

Overall Height the vertical distance between the bottom of the wheel and the lowest point where the load is mounted to the caster

Outside Bolt Spacing the distance between the centers of opposite boltholes

Rig the caster housing without a caster

Rig Finish / Coating the color of the rig

Rig Material the material of a caster housing without a wheel

Rig Type the type of rig on a caster determines which determines maneuverability; rigid rigs only allow horizontal movement, swivel rigs allow movement in any direction

RoHS compliant to the European Union’s Restriction of Hazardous Materials directive

Series the manufacturer’s grouping of the caster/wheel with similar products

Stainless Steel made of stainless steel; resistant to tarnishing and rust

Static Load Capacity the total load that ONE caster is capable of supporting, WITHOUT MOVING, on a continuous basis

Stem Size the dimensions (diameter by length) of the stem on a caster that uses stem mounting

Stem Type the specific type of stem on a caster that uses stem mounting; possible options are expanding, grip neck, grip ring, knurled, modular, octagon, pipe thread, round, side fitting, square or threaded

Swivel Lead the horizontal distance between the center of the swivel section and center of the wheel

Swivel Lock a feature that converts a swivel caster into a rigid-like caster that allows only straight-line movement; available as welded, bolt-on or kingpinless

Swivel Raceway the surface over which bearing balls rotate on a swiveling rig; either single or double

Swivel Radius the radius of possible maneuverability on a caster that uses a swivel rig; measured by the horizontal distance between the center of the swivel section and the center of the wheel

Swivel Seal upper and lower raceway seals on the rig that prevent debris from disrupting the caster’s ability to swivel

Temperature Maximum the highest temperature at which the caster can safely operate

Temperature Minimum the lowest temperature at which the caster can safely operate

Thread Count the number of threads on a threaded stem

Thread Guard a piece of material that protects the wheel bearing by preventing thread, dirt or other debris from disrupting the wheel’s ability to roll smoothly

Thread Guard Material the material of the thread guard

Thread Pitch the distance between threads on a threaded stem measured in millimeters

Top Plate Length the length of the top plate

Top Plate Pattern the pattern of holes on the plate of a caster that uses top plate mounting

Top Plate Size the dimensions (width by length) of the plate on a caster that uses top plate mounting

Top Plate Thickness the thickness of the top plate

Top Plate Width the width of the top plate

Tread the part of the wheel that rolls along the ground

Tread Category the wheel’s tread material; either rubber, polyurethane, plastic/nylon or metal

Wheel Bearing the type of bearing found between the wheel and axle; impacts the rollability of the wheel

Wheel Color the color of the tread of a wheel

Wheel Count the number of wheels on the caster

Wheel Durometer how hard the wheel is; the position of the wheel material on the Shore hardness scale; see Wheel Durometer Information.

Wheel Hub Color the color of the hub of a wheel; only applicable on wheels with different tread and core materials

Wheel Material the material(s) of the caster wheel; see our Wheel Descriptions page for more information

Wheel Size the dimensions (diameter by width) of a caster wheel

Zerk a grease fitting used to lubricate the wheel bearing

Caster Measurements & Significance.

The descriptive measurements associated with casters can get extremely complex extremely quickly. We understand that with some applications, measurements are critical, but with others, they aren't so much. We have created the following presentation to better explain some of the extensive information found on our product pages.

Durometer Information.

The Shore Hardness scales help define the hardness (i.e. durometer) of a material by giving a measurement representing the material’s likelihood of permanent indentation. Of the available scales, two are used to describe caster wheel durometers: Shore A and Shore D. We've put together the below presentation to provide you with a better understanding.

AXX Wheels.

Have you heard about the AXX wheel?

The AXX wheel is the industry standard for ergonomic efficiency in the work place. Check out the following slides for more information or see its availability on the GLC product page.

Colson Casters.

Colson casters are the industry benchmark when it comes to a reliable mobility solution, no matter the application. The following slides provide a closer look into their most popular series and products.

Food Processing Casters.

Looking for food processing casters? We've got you covered. Want to know your options first? Check out the slides below.

Polyurethane Wheels.

Nearly everything you need to know about polyurethane tread wheels can be found in the slides below. If you have any further questions, don't hesitate to ask us!

Road Case Casters.

Musicians need special casters and we are here to help. Check out the below presentation for details on the most popular products in the industry.

Shepherd Pacer Series.

Shepherd's Pacer series of casters offers a full selection of all the products you need to replace your chair casters. For details on exactly what it has to offer, check out the slides below. And yes, we know these products aren't yet listed on our website. Get ahold of us and we can help you order the exact casters you need.

Wheel Failure.

What makes a wheel fail? Check out the below presentation to see the most common reasons for wheel failure in addition to the physical and exposure limits of four of our most popular wheels.