This graph is pretty much the same as in AGMA 2001 which doesnt have this symbol. So I used the AGMA 2001 method for case depth, but Id love to know what that symbol means if anyone knows. Thanks.
I'm looking into case depth calculations for 9310 gears and and AGMA 926 has this reference for minimum case depth but I do not know what the C with a vertical line through it means. Theres no key for symbols in this standard.
Thanks for the help!
I've been researching this but sometimes you just need an expert to give a straight answer. I'm at a small aerospace design shop where I dont have access to gear mfg, so its difficult to understand some of these inspection methods without the firsthand experience.
If our gear drawings define...
I saw one of your other posts on a similar topic and was going to reach out to you individually. This is great info and really appreciate your time to provide these standards. thank you!
Same goes to everyone else too. Thank you!
My apologies. I can see where that might be confusing. We work exclusively with steel bearings so I forgot to consider the other possibilities.
52100 bearing material, 1" OD, 0.28" width. The entire bearing is seated in a housing that is aluminum.
What 3DDave and LiftDivergence said resonate...
Thanks for the feedback.
To provide some more clarity, its a geared actuator with mostly radial ball bearings. Its these radial bearings that are in aluminum housings that I'm asking about.
Just wondering if other have had the same situation, what drove them to the decision they made about...
I'm working on a flight controls actuator and since I'm fairly new to the arena I'm not familiar with best practices.
Theres been questions raised that a few of our highly loaded bearings (towards the flight surface output) should have steel sleeves around them because they are in aluminum...
Was hoping to get feedback on pros/cons between different gear design software such as KISSsoft, Romax, MITcalc, PowerGear, etc.
We currently use KISSsoft but its clunky and seems like a beta version of software, training isnt readily available, and seems to default to ISO/DIN standards when we...
Thanks for the feedback.
15-5 chosen because its what my company traditionally used for our gearboxes for relatively high strength, core ductility, and anti-corrosion.
Driver inputs are for max operating condition are ft-lb = 9.2 at 2686 RPM.
Gear ratio is 2.048:1.
For this specific...
I havent been a gear designer for a long time, but I'm following AGMA 2001 and my values are verified by KISSsoft. So because I havent been designing gears for long, I'm not sure how to deal with this situation:
Gear pair is 48 pitch with driver spinning at 1686 RPM worst case for only 4.44...
Thanks for that feedback. I figured a lot more goes into it than I initially expected. That said, my updated approach is to establish min assembly torque limit from operating torque load through the housing plus 25% for preload sensitivity due to thread inconsistencies. Then for my max limit...
I just read another post which highlighted an important design criteria. I should be torqueing to a preload based on my expected operational load through the housing, not based on 80% of Sy. This makes a lot more sense to me. That said, the load going through the housing is pretty low, so my...
I'm working on what torque value to call out on our prints but these are not bolts/screws, but thin-walled cylindrical housings. Therefore, I'm not sure the same clamping torque calculation applies. For example, one housing is 15-5PH stainless at 3.875" diameter and the bolt clamping formula...
Thanks again. All great info. We typically fill bearings 10-15% of grease. Anything more would cause too much heat. But that SKF formula will be looked into and documented. As part of the next gen of engineers here, I'm really trying to move away from tribal knowledge where possible.
We're...
Thanks for the replies. The use of technical forums is so very underrated (as long as you adhere to 'trust, but verify').
Grease is the operating lubricant. My firm designs actuators for aerospace/defense. Grease has always been our go-to such as Braycote 601 or Aeroshell 7 or 33, because our...
