Pololu Ball Casters

Pololu Ball Casters

Ball casters provide smooth, omni‑directional movement for compact robots and mobile platforms. They are built around a spherical ball, available in plastic or metal, encased in a two‑part ABS housing that snaps together, protecting the ball and any internal bearings or rollers. Small‑diameter options (3/8 in to 1 in) keep the overall height low, allowing tight integration under chassis or sensor mounts, while larger balls increase load capacity. Plastic balls and rollers give lightweight, low‑cost solutions, whereas metal balls and ball‑bearing assemblies deliver higher durability and reduced friction for more demanding applications. The modular spacer system lets users adjust caster height to suit different frame designs, ensuring reliable operation and easy replacement across a range of robotic and automation projects.

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Pololu Ball Caster with 1/2″ Metal Ball

Code: MEC-30007

This ball castor 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.

$ 4.95

In stock in Australia

Shipping from $9.90

+248 more from our supplier in 7-10 days

Pololu Ball Caster with 1/2″ Plastic Ball

Code: SKU-002439

This light ball castor 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.

$ 4.40

In stock in Australia

Shipping from $9.90

+288 more from our supplier in 7-10 days

Pololu Ball Caster with 1″ Plastic Ball (old version)

Code: MEC-30033

This light ball castor 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.

$ 10.95

In stock in Australia

Shipping from $9.90

+58 more from our supplier in 7-10 days

Pololu Ball Caster with 1″ Plastic Ball and Ball Bearings

Code: SKU-003361

This ball castor 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 minimise friction between the ball and the ABS housing.

$ 14.95

In stock in Australia

Shipping from $9.90

+511 more from our supplier in 7-10 days

Pololu Ball Caster with 1″ Plastic Ball and Plastic Rollers

Code: SKU-003360

This ball castor 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.

$ 9.95

In stock in Australia

Shipping from $9.90

+373 more from our supplier in 7-10 days

Pololu Ball Caster with 3/4″ Metal Ball

Code: SKU-002440

This ball castor 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.

$ 6.95

In stock in Australia

Shipping from $9.90

+400 more from our supplier in 7-10 days

Pololu Ball Caster with 3/4″ Plastic Ball

Code: MEC-30008

This light ball castor 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.

$ 7.95

In stock in Australia

Shipping from $9.90

+212 more from our supplier in 7-10 days

Pololu Ball Caster with 3/8″ Metal Ball

Code: MEC-30034

This small ball castor 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.

$ 4.35

Special Order

Shipping from $4.90

+526 more from our supplier in 7-10 days

Pololu Ball Caster with 3/8″ Plastic Ball

Code: SKU-002438

This small, light ball castor 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.

$ 4.20

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Shipping from $9.90

+554 more from our supplier in 7-10 days

Replacement 3pi Ball Caster with 1/2″ Plastic Ball

Code: SKU-002441

This ball castor 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.

$ 3.55

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Shipping from $9.90

+33 more from our supplier in 7-10 days