Pololu Ball Caster with 3/8″ Metal Ball

Pololu item #: 951
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant

Price break Unit price (US$)
1 2.49
5 2.29
25 2.11
100 1.94


backorders allowed

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.

Alternatives available with variations in these parameter(s): ball diameter ball material Select variant…

 Description Specs (3) Pictures (2) Resources (2) FAQs (1) On the blog (2) 

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

Overview

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 7/16″ #2 screws and nuts. 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, or you can use your own #2 or M2 screws if your application requires a different length.

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 generally keep it from rolling well.

For detailed dimensions, see the dimension diagram (164k pdf).

Comparison of Pololu ball casters

Pololu ball casters with plastic and metal balls. Ball diameter from left to right: 1″, 3/4″, 1/2″, and 3/8″.

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
0.88″ 0.24″ 0.25 oz
0.82″ 0.61″ 1.05 oz
1.10″ 0.48″ 0.65 oz
1.10″ 0.48″ 0.58 oz
1.10″ 0.70″ 0.36 oz

People often buy this product together with:

Pololu Ball Caster with 3/8″ Plastic Ball Pololu Ball Caster with 3/8″ Plastic Ball
QTR-8A Reflectance Sensor Array QTR-8A Reflectance Sensor Array
Pololu Micro Metal Gearmotor Bracket Pair - Black Pololu Micro Metal Gearmotor Bracket Pair - Black

Related Products

Pololu 5" Robot Chassis RRC04A Solid Red
Pololu Ball Caster with 3/8″ Plastic Ball
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Pololu Ball Caster with 1/2″ Metal Ball
Pololu Ball Caster with 3/4″ Plastic Ball
Pololu Ball Caster with 3/4″ Metal Ball
Pololu Ball Caster with 1″ Plastic Ball and Ball Bearings
Pololu Ball Caster with 1″ Plastic Ball and Plastic Rollers
Pololu Ball Caster with 1″ Plastic Ball (old version)
Replacement 3pi Ball Caster with 1/2″ Plastic Ball
Tamiya 70144 Ball Caster Kit (2 casters)
Machine Screw: #2-56, 7/16″ Length, Phillips (25-pack)
Machine Hex Nut: #2-56 (25-pack)

Related Categories

Pololu Ball Casters
Nuts and Screws
Pololu Wheels and Tracks
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