markz528
Hot Rolled
- Joined
- Sep 25, 2012
- Location
- Cincinnati
I am restoring a 1965 Leece Neville cop car alternator. I scored a new drive end end bell that I need to use but it uses a larger 6206 bearing versus the 6304 bearing that I need to use. My plan is to sleeve the bore of the end bell to fit the correct bearing. The end bell is aluminum and I will use a steel sleeve.
I really would prefer to pre-machine the bushing/sleeve to size so that I don’t have to bore it after install. My question is will I be able to get away with this or will I have bore the sleeve to size after I install it?
I assume that max temperature rise will be 100 degrees F. The aluminum bore is around 2.5 inches diameter. At 100 deg and 2.5 inches, the aluminum bore should grow around 0.0015” diameter more than the steel sleeve. So my target press fit of the sleeve is 0.0020” to 0.0025”. The target bore of the sleeve for the 6304 bearing is 2.0472” – 2.0480”. The bushing/sleeve wall will be around 0.200” thick.
I assume that the sleeve should have reasonable form after I press it in. But the question how will the sleeve bore diameter change after I press it in? Can I get away with this or do I need to suck it up and plan on boring it after I press the sleeve in?
I really would prefer to pre-machine the bushing/sleeve to size so that I don’t have to bore it after install. My question is will I be able to get away with this or will I have bore the sleeve to size after I install it?
I assume that max temperature rise will be 100 degrees F. The aluminum bore is around 2.5 inches diameter. At 100 deg and 2.5 inches, the aluminum bore should grow around 0.0015” diameter more than the steel sleeve. So my target press fit of the sleeve is 0.0020” to 0.0025”. The target bore of the sleeve for the 6304 bearing is 2.0472” – 2.0480”. The bushing/sleeve wall will be around 0.200” thick.
I assume that the sleeve should have reasonable form after I press it in. But the question how will the sleeve bore diameter change after I press it in? Can I get away with this or do I need to suck it up and plan on boring it after I press the sleeve in?