This light ball caster uses a 3/4″ diameter plastic ball. The height of the assembled kit ranges from 0.9″ to 1.2″. Dowel pins are used to minimize the friction between the ball and the ABS housing.
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This ball caster kit includes a black ABS housing, a 3/4″ diameter plastic ball, three dowel pin rollers, two spacers (1/16″ and 1/8″ thick), and two #2 screw sets. The total height of the ball caster, 0.91″, can be increased to about 1.1″ using the included spacers. The two included #2 screws can be used to mount the ball caster to your chassis (the distance between the screw holes is 0.24″).
Note that our ball casters are designed for small robots; they are not intended to bear more than a few pounds. With more weight than this, friction between the ball and the housing will probably keep it from rolling well.
Comparison of Pololu ball casters
|Pololu ball casters with plastic and metal balls. Ball diameter from left to right: 1″, 3/4″, 1/2″, and 3/8″.|
Pololu ball caster
People often buy this product together with:
|Pololu Ball Caster with 1/2″ Plastic Ball|
|Pololu Ball Caster with 3/4″ Metal Ball|
|Pololu Ball Caster with 1″ Plastic Ball (old version)|