Originally Posted by
onehundred80
Either he is right or Rudy and myself are right.
When you have gears rotating at high speed an aerosol of the oil will be formed at the same time the air in the SC gear housing will expand with heat. You do not want that aerosol mixing with the hot air escaping through the bearings and seals at the front of the SC as this will soon deplete the oil. You basically just want the expanded air to escape and the minimum of oil.
The photo shows the hole in the shaft from both ends, with a hole in the bolt why wouldn’t the expanded air and the cooler air later pass through the whole to bring the air pressure inside the gearbox back to the ambient air pressure?
I made the wrong assumption way back and I got this reply from Rudy. Ironically you replied to Rudy’s post immediately after his post and did not disagree then.
CLiCK
FWIW, I have the hollow bolt. Rob just told me that they have been using the solid bolts for the past decade without issues. I stand on my belief that a hollow bolt with no pinhole at the top, does absolutely nothing.
The bolt simply doesn't vent. Except for the hole at the end of the bolt threads, it's an enclosed chamber that measures in minimal c.c.'s As Spock would say, "Highly Illogical".