This is a 951-POLOLU Pololu Ball Caster with 3/8" Metal Ball.
This ball caster kit includes a black ABS housing, a 3/8" diameter metal ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of the ball caster, 0.4", can be increased to about 0.6" 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 0.53").
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.
|
Product
|
Ball diameter
(in)
|
Weight
(g)
|
Ball material
|
|
|---|---|---|---|---|
| 950-POLOLU | Ball Caster with 3/8″ Plastic Ball | 0.375 | 0.8 | plastic |
| 951-POLOLU | Ball Caster with 3/8″ Metal Ball | 0.375 | 4 | metal |
| 952-POLOLU | Ball Caster with 1/2″ Plastic Ball | 0.5 | 2 | plastic |
| 953-POLOLU | Ball Caster with 1/2″ Metal Ball | 0.5 | 9 | metal |
| 954-POLOLU | Ball Caster with 3/4″ Plastic Ball | 0.75 | 7 | plastic |
| 955-POLOLU | Ball Caster with 3/4″ Metal Ball | 0.75 | 30 | metal |
| 956-POLOLU | Ball Caster with 1″ Plastic Ball (old version) | 1 | 10 | plastic |
| 2691-POLOLU | Ball Caster with 1″ Plastic Ball and Plastic Rollers | 1 | 16.5 | plastic |
| 2692-POLOLU | Ball Caster with 1″ Plastic Ball and Ball Bearings | 1 | 18.5 | plastic |
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