Pololu Ball Casters

This small, light ball caster uses a 3/8″ diameter plastic ball. The height of the assembled kit ranges from 0.4″ to 0.6″, depending on the combination of included spacers used.

This small ball caster uses a 3/8″ diameter metal ball. The height of the assembled kit ranges from 0.4″ to 0.6″, depending on the combination of included spacers used.

This light ball caster uses a 1/2″ diameter plastic ball. The height of the assembled kit ranges from 0.5″ to 0.8″, depending on the combination of included spacers used.

This ball caster uses a 1/2″ diameter metal ball. The height of the assembled kit ranges from 0.5″ to 0.8″, depending on the combination of included spacers used.

This light ball caster uses a 3/4″ diameter plastic ball. The height of the assembled kit ranges from 0.9″ to 1.2″, depending on the combination of included spacers used. Included dowel pins can be used to reduce the friction between the ball and the ABS housing, but they are not necessary for operation.

This ball caster uses a 3/4″ diameter metal ball. The height of the assembled kit ranges from 0.8″ to 1.1″, depending on the combination of included spacers used.

This ball caster uses a 1″ diameter plastic ball and has an overall height of 1.1″ (29 mm). The two-part housing snaps together to securely enclose the ball and three ball bearings that minimize friction between the ball and the ABS housing. The base piece of the housing has holes for three #4 or M3 screws (not included).

This ball caster uses a 1″ diameter plastic ball and has an overall height of 1.1″ (29 mm). The two-part housing snaps together to securely enclose the ball and three plastic rollers that reduce the friction between the ball and the ABS housing. The base piece of the housing has holes for three #4 or M3 screws (not included).

This light ball caster uses a 1″ diameter plastic ball. The height of the assembled kit ranges from 1.1″ to 1.4″, depending on the combination of included spacers used. Included dowel pins can be used to reduce the friction between the ball and the ABS housing, but they are not necessary for operation.

This ball caster was originally released as a replacement part for the 3pi robot, but the 1/2″ ball can also be used a replacement part for the newer 3pi+ robot, which has the housing for the ball built directly into the chassis. This ball caster can also be used as a general-purpose ball caster: when mounted through a hole in a chassis that uses our micro metal gearmotors and our 32×7mm wheels, as on the 3pi, this ball caster is just the right height to keep the chassis level.