Re: Trying to make a gear pump
			 
			 
			
		
		
		
			
			Ed, 
    " just larger than the hole in the gear then heat the shaft and put the gear in the freezer for a while and they should go together " you mean the other way around don't you?  freeze the shaft to shrink and heat the gear to expand, gear slips on shaft and the shaft heats and expands locking the gear in place. 
 
cheers 
 
Paul
		 
		
		
		
		
		
		
		
		
	
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