65Corvair wrote:
On a semi-related note, it is cool to see them use a ball and cylindrical bearings in a single unit. Cylindrical bearings are good large amounts of radial force, but are poor at managing force in the axial direction, thus the ball bearing.
I totally agree, that is why I have searched diligently for a bearing of similar construction to the OEM bearing to no avail. There are several water pump bearings available that I found with the roller/ball bearing combo construction, but none with close enough dimensions in a usable size unfortunately. Most are too small, either the shaft diameter or the bearing OD! The OEM bearing is quite a large bearing as compared to whats available in water pump bearings that I was able to find online.
I could not find any roller bearing of the correct ID & OD size to use in combination with the two ball bearings. I wanted to use one roller and two ball bearing together in a combination to handle the loads.
I am hoping that by adding a third bearing along with having three slightly larger bearings, the load factor both axial and radial will not be a issue.
By distributing the axial and radial loads across three deep grove bearings it actually should be a more robust design than the OEM bearing since it had only one ball bearing to sustain the axial load and only one roller bearing to sustain the radial load.
Using three bearings equates to larger and more surface area to handle both type load factors.
I will still recommend using the 11 blade plastic either GM or Mopar fan to prolong bearing life and lower the load factor on the bearings for the rebuilt hub unit.
These are the load specs for the single "Deep Grove Ball Bearing" I am using.
so X3 for actual numbers:
Basic dynamic load rating--C--9.95--kN
Basic static load rating--C0--5--kN
Fatigue load limit--Pu--0.212--kN
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Reference speed-- --38000--r/min
Limiting speed-- --24000--r/min
Calculation factor--kr--0.025--
Calculation factor--f0--14
Any mechanical engineers see a problem, please comment.
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