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			Thats some jig your using ,but i guess your mass producing them .I didnt realise you were a buisness .I used soft jaws machined to the front boss dia and faced them so the hub sits squaure .I didnt have to machine the front just make a bearing spacer.I guess from the pictures you press the insert in with the bearing c/b under size and finish machine that in the fixture. 
Many thanks Chris .
		 
		
		
		
		
		
		
			
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