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tbuelna: Thank you for the info regarding case depth. The gears are machined to AGMA Q13. The pitchline of this particular gear is more like 27,000ft/min which is still pretty high. I should have mentioned that this is an external gear but it looks like you assumed this already...

First...I am not a gear design 'expert' and am even less of a materials expert when it comes to gear design, but I'd say I know enough to be dangerous. So I'm looking at a high speed, high power helical gear application. Using AGMA 2001 and 6011 for ratings. Gear ratios between 7 to 22...

I am designing a gear case to house two pinions mated in series with a bull gear (BG in the middle driving both). I've seen that the center distance that is machined into the gear case is usually a few mils larger than the theoretical center distance but is there an established method for...

Terry, Thanks for the advice, this is very helpful. One more thing, After some research and reading through an AGMA paper on the topic I am considering separating the cooling and lubrication flows as you said but instead of spraying the cooling flow into the out-mesh, spraying it on the...

I've been searching on and off for the last 6 months for established methods for determining the minimum and recommended flow rate to lubricate and cool a high speed helical gear mesh and have found very little. And the methods I have found have produced a broad range of flow rates. This is a...

I was recently given the task of calculating the required drain size needed to drain an annulus fed by oil being ejected from a hydrodynamic bearing. This would be a gravity drain that is self venting. It is required that there will not be a fluid level build up in the annulus. Details: An...