Oil Seal and Heat Build Up

I will machine a new spindle today using 1144 stress proof.
This will be the seal I'll be using.
https://www.mcmaster.com/#9562k46/=19es0ol
I'll have to make the collar larger so it fits well. Originally it was .812". Will make it .950"
Also I bought one new bearing. It's an ND made in the US which I can find no info on. ID is 15 mm. OD is 35 mm.
 
What make is the SF grinder? A surface grinder needs high speed precision bearings rated at 5500 to produce a good finish.
 
Spindle is complete with one new bearing and shaft seal. Runs with no heat buildup. I'll consider this project over. Next will be grinding my vise.
 
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