what is the specific dimension of a thrust needle roller bearing - 3 pcs
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You have it in the Robot Arm assembly, it's from shaft 1 ", outside diameter 1- 9/16". The reference is 5909K36 of McMaster Carr, you can look on their website for more information. In Europe I have not found those dimensions exactly, the most similar is the AXK2542, which has a larger external diameter.