Caster Selection Guide- Office Furniture Casters

Guide for Office Furniture Casters, Chair Casters, Table and Cart Casters...

Office chair casters, also known as twin wheel casters, are produced in a variety of styles, sizes and features.  Below are descriptions of the most commonly used office furniture casters:

Click on a heading to advance to the appropriate section:

Wheel Size
  30mm-45mm Caster Wheels
  50mm-65mm Caster Wheels
  75mm-125mm Caster Wheels
Wheel Type
  Hard Wheel Casters
  Soft Wheel Casters
  Antistatic Casters
Housing Type
  Unhooded Casters
  Hooded Casters
  Hooded Casters with Collar
Braking Options
  Non-braking Casters
  Lever Brake Casters
  Compression Brake Casters
Caster Stems and Attachments
  Friction Ring Stem
  Threaded Stem
  Top Plate  

Wheel Size- measured in millimeters, ranges from 30mm to 125mm or more 

30mm-45mm Caster Wheel Diameter: typically used on mobile furniture such as credenzas or filing cabinets, wheels not large enough for office chair casters due to the higher weight loads and impediment heights common for office chairs

50mm-65mm Caster Wheel Diameter: typical office chair casters used on office chairs, ideal for the weight load and conditions where office furniture is used, wheels too large of a profile for mobile office furniture and cabinets and not durable enough for higher weight loads required of carts and heavy duty furniture.  50mm wheels are more economical and have a lower less obvious profile, 55mm-65mm wheels are typically more durable and are more visible of an office chair caster

75mm-125mm Caster Wheel Diameter: ideal for heavy duty office furniture applications such as carts and tables, generally of a more durable construction these casters can be of the usual twin wheel caster construction or the more durable riveted axle style which can perform under greater loads and higher impediments, generally too large of a profile for use as office chair casters as well as being less economical than the 50mm-65mm office chair casters

Wheel Type- describes the construction of the wheels on twin wheel furniture casters 

Hard Wheel Caster- wheels are constructed entirely of one material, usually nylon.  Ideal for use on all surfaces and is the most common and economical caster wheel type, the most undesirable effect of the hard wheel caster is its tendency to be noisy on hard surfaces, especially uneven surfaces like ceramic tile or concrete 

Soft Wheel Caster- wheels are constructed of a hard core surrounded by a softer material, typically nylon core and thermoplastic polyurethane caster wheel tread, provides a softer feel and more quiet performance but is much more expensive than the hard wheel caster due to the fact that this caster wheel uses more expensive materials and is produced in multiple processes, usually a high end option for hard and uneven surfaces

Conductive Wheel Caster- a specialty caster produced in both soft and hard wheel versions but where the wheel and caster body conduct electricity, useful in clean room and antistatic applications

Housing type- describes the design and style of the caster body

Center Housing/Unhooded Caster- this design of caster body has no hood or cover over the wheels, so the caster wheels are entirely visible and offers a more technical appearance and some economics due to its use of less material
Unhooded Chair Caster, Office Castor

Hooded Caster- this design features a cosmetic hood, covering or fender over the wheels which conceals the tread of the wheels and gives the furniture caster a more classic polished appearance as well as less areas in which dirt or dust can collect, one of the most popular and generic furniture caster styles.
Caster, Hooded Castor

Hooded Caster with Collar/Euro Style- the most popular design for office chair casters, like the hooded caster this version also features a hood covering the caster wheels but also has a collar or barrel which surrounds the stem and is the same size as the chair base, giving the chair base and chair caster a continuous unitary appearance.  Collars are available in various sizes to match the end of the chair base, with the most common sizes being 38mm and 45mm in diameter.
Office Furniture Caster, Hooded Caster with Collar

Braking Options- the function to lock the caster wheels

Non-braking Casters- the most common type of braking option is no braking meaning the caster has no mechanism to lock the wheels in any way at any time, the most economical and common option since most applications like office chairs never require that the wheels be locked

Lever Brake Caster- the most popular type of braking when braking is required, features a lever on the caster housing that generally has two positions locked, which locks the caster wheels, and unlocked which allows the furniture caster wheels to roll freely, generally an option used for carts, tables or other mobile systems other than office chairs where immobilization of the office furniture is desired at times
Lever Brake Caster, Chair Caster

Compression Brake Caster- a specialty caster with spring-loaded wheels which do not roll freely unless weight is applied to the caster (in compression), a safety feature which prevents the office chair from rolling freely when the user stands up from the chair, in many European countries this is a requirement on all office furniture casters  

Caster Stems and Attachments- this is how the furniture casters attach to the furniture 

Friction Ring Stem- the most popular attachment for office chair casters and many other office furniture caster applications, consists of a smooth metal stem containing a spring ring that compresses when the caster is inserted into the receptacle, easy to insert and remove and usually provides sufficient holding power, ideal for plastic chair bases or tubular furniture with caster socket inserts
Caster stem, friction ring stemsCaster Sockets, for Friction ring stem

Threaded Stem/Bolt Stem- more common for tables, carts and frames-based metal furniture, the stem screws into a T-nut or other threaded insert, typically not recommended for office chairs, can provide for adjustment if necessary
Caster threaded bolt stem

Top Plate- a steel stamping which screws into the bottom of the furniture and attaches to the caster, common for the bottom of wood office furniture
Caster top plate

 

 

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