![Firgelli Robots Concave Ball Bearing Roller - Bore Dia.:4mm](http://www.firgellirobots.com/cdn/shop/products/426879883b844146729_1024x1024.jpeg?v=1441225243)
Concave Ball Bearing Roller - Bore Dia: 4mm
Overview:
Concave pulley bearings are commonly used in many household products, and are also used on robots for mechanical purposes, such as hemming. This pulley bearing is a very standard one for applications.
Specs:
Pulley wheel material: nylon
Bearing adapter: brass