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Pololu Ball Caster with 3/8" Plastic Ball


$2.51 AUD, inc GST
$2.28 AUD, exc GST

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Pololu Ball Caster with 3/8" Plastic Ball
2.51 AUD


$2.51 AUD, inc GST
$2.28 AUD, exc GST
1 reviews 0 5 5
In stock, ships same business day if ordered before 2PM
Delivered by Tue, 24th of Jul
Shipping Offer


  • $6.95 Standard (2-4 days, tracked)
  • $8.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

Pololu ball caster with 3/8" plastic ball with included hardware.


This ball caster kit includes a black ABS housing, a 3/8" diameter plastic 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 Pololu's 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 caster
ball diameter
height with
no spacers
screw holes
weight with
no spacers
or screws
3/8" plastic-ball
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

This product is listed in:

Documentation and Resources:
  • The Maker Revolution
  • The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...

Product Comments

Customer Reviews

  1. Review by Geoffrey verified purchaser

    I had been looking for a roller ball system to use with lego technic sets especially with EV3 and NXT robots. This caster fits perfectly into the holes of the technic beams and does the same job as the lego equivalent which costs around $20 compared to this one at $2.51!!! The Pololu Ball Caster with 3/8" Metal Ball is slightly better to use this plastic one. (Posted on 25/08/2016)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (Overnight for Australia Post Next Day Network, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
NSW, 2289

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!