View Full Version : bushing-shaft clearance ???

12-23-2010, 06:01 PM
I have to make a bronze bushing for a 10 stage high lift water pump. The pump has a 1.5" stainless steel shaft and will be running in water. No other lubrication. I'm thinking 1-2K clearance on the bore. Yes??? No??? maybe???

12-23-2010, 06:37 PM
I manufactured and rebuilt them for years. I would go for the .013 .

Vertical turbine pumps are made with .006 to .013 clearance depending on the

OD on the bushing is usually .002 to .004 press

most pumps run at 1800 RPM

Use a SAE 660 bearing bronze. SAE 664 bearing bronze is softer and will collapse more when pressed into the hole.

re- boring the holes is not necessary with SAE 660

If it has closed impellers the wear rings use .016 min up to .025 max.

12-23-2010, 08:43 PM
JS.....thanks for that reply. After posting this question I found a chart from Anchor Bronze that showed a clearance of .0015-.004.


After reading your reply, obviously this would be not enough in this application. I will go with your years of experience. Thanks again