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Pololu Ball Casters
Our ball casters (often called ball transfers when used with the ball facing up) are great third contact points for small differential-drive robots. These units have larger ball diameter-to-weight ratios than industrial units, giving your robot the ability to drive over larger obstacles without adding too much weight.
These ball casters are intended for robots weighing up to a few pounds. The larger ball casters are not made for more weight but rather to allow greater obstacle clearance.
Comparison of Pololu ball casters
Pololu ball caster ball diameter |
height with no spacers |
distance between screw holes |
weight with no spacers or screws |
| 0.40" | 0.53" | 0.03 oz | |
| 0.40" | 0.53" | 0.14 oz | |
| 0.53" | 0.58" | 0.07 oz | |
| 0.53" | 0.58" | 0.32 oz | |
| 0.91" | 0.24" | 0.25 oz | |
| 0.83" | 0.61" | 1.05 oz | |
| 1.10" | 0.70" | 0.36 oz |
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Pololu item #:
949
Price: $24.95 |
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Pololu Ball Caster Variety PackOrder the Pololu ball caster variety pack and save! The variety pack consists of all seven Pololu ball casters. |
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Pololu item #:
950
Price: $2.99 |
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Pololu Ball Caster with 3/8" Plastic BallThis small, light ball caster uses a 3/8" diameter plastic ball. The height of the assembled kit ranges from 0.4" to 0.6". |
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Pololu item #:
951
Price: $2.99 |
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Pololu Ball Caster with 3/8" Metal BallThis small ball caster uses a 3/8" diameter metal ball. The height of the assembled kit ranges from 0.4" to 0.6". |
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Pololu item #:
952
Price: $3.99 |
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Pololu Ball Caster with 1/2" Plastic BallThis light ball caster uses a 1/2" diameter plastic ball. The height of the assembled kit ranges from 0.5" to 0.8". |
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Pololu item #:
953
Price: $3.99 |
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Pololu Ball Caster with 1/2" Metal BallThis ball caster uses a 1/2" diameter metal ball. The height of the assembled kit ranges from 0.5" to 0.8". |
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Pololu item #:
954
Price: $5.99 |
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Pololu Ball Caster with 3/4" Plastic BallThis 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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Pololu item #:
955
Price: $4.99 |
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Pololu Ball Caster with 3/4" Metal BallThis light ball caster uses a 3/4" diameter metal ball. The height of the assembled kit ranges from 0.8" to 1.1". |
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Pololu item #:
956
Price: $6.99 |
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Pololu Ball Caster with 1" Plastic BallThis light ball caster uses a 1" diameter plastic ball. The height of the assembled kit ranges from 1.1" to 1.4". Dowel pins are used to minimize the friction between the ball and the ABS housing. |
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