Resists chair movement when weight is on the caster. Most often used for added safety on work stools (e.g., drafting chairs). Soft tread protects hardwood and tile floors.


(a.k.a., Reverse braking casters; Loaded brake casters; Braked-upon-charge casters, Resisting casters)

Reverse Braking Casters resist chair movement when weight is on the caster. Most often used for added safety on work stools (e.g., medical, drafting, factory and dental stools) that are higher than typical chairs.

  • Caster body is made of high impact modified polyamide 6.
  • 50 mm (1.96") wheel-diameter.
  • Sturdy 135 lb. load capacity per caster.
  • Soft non-marking, non-abrasive tread is safe on hardwood and tile floors.
  • Full hood.
  • Universal mounting stem fits most, but not all, office chairs.
    11mm (1/3") D x 19mm (3/4") L


Average Rating:
(based on 1 review)

Showing 1 Review:

by Steven
on 5/4/2012
Meets specifications but not expectations
The casters do what they are designed to do, but on a hardwood floor, they slide easily when locked, which is just as bad as rolling. Maybe they will work better on carpet.
Review and Rate this Item

Use | Fit 


  • Internal breaking casters are designed to lock only when you are sitting in the chair. The caster wheel lock may not engage if you weigh less than 110 pounds.


  • Please check your chair specifications prior to order.
    Friction ring stem is compatible with most, but not all, task chairs and stools.

Universal mounting stem
11mm (1/3") diameter;
19mm (3/4") long.


  1. Turn the chair on its side.
  2. If you have strong hands, you can remove castors by pulling. Otherwise you may need a lever, for example, a chisel or a screwdriver which you place between the castor and the chair base. If the castor stem remains caught in the base, grip the stem with pliers and pull it out. You may need to tap the pliers with a hammer until the stem loosens.
  3. Push the new castor or glide into place.


  • Sticky casters can usually be remedied with a thorough cleaning to remove accumulations of hair and debris in the caster wheels. If after cleaning the casters still do not turn easily, they should be replaced.
Occupied Braking Chair Caster, 50 mm
Item #: 43021S-050

Price is for one (1) caster. Order a quantity of five (5) casters for a typical 5-star chair base.

Our Price: $30.00
6 units available

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