![Firgelli Robots Concave Ball Bearing Roller - OD: 20/23mm](http://www.firgellirobots.com/cdn/shop/products/192657470c360778808_1024x1024.jpeg?v=1441225803)
Concave Ball Bearing Roller - OD: 20/23mm
Overview:
Concave ball bearings are commonly used in many household products, and are also used on robots for mechanical purposes, such as hemming.
Specs:
Pulley wheel material: nylon
Bearing adapter: brass