THIS product is a complete disaster. Based on my experience the Flanged Bearing I D 16 PK3 is utterly useless in an industrial setting .The bearings showed signs of wear and tear within just a few weeks of use, rendering them ineffective. It's a shame that these bearings are marketed as suitable for power transmission products in the Industrial and Scientific category because they clearly cannot handle the demands of everyday work. Save your money and look for a more reliable alternative..