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Great points about assembly requirements and load sharing for a simple epicyclic. ANSI/AGMA 6123-B06 section 6 provides some excellent guidance. - The 18T/26T/70T configuration is non-factorizing for 3 evenly spaced planets and factorizing for 2 or 4 evenly spaced planets. - The AGMA recommended...

http://www.autos.ca/auto-tech/auto-tech-bmws-30-litre-magnesiumaluminium-composite-engine-block/

Barrel nut. https://www.lisi-aerospace.com/wp-content/uploads/2019/04/Barrel-nuts-1.png

A gauge load is normally specified for inspecting angular contact ball bearing characteristics like preload gaps or contact angles. Gauge loads are usually just enough to produce uniform contact between the ball complement and race surfaces. Modern rolling element bearing analysis software...

ANSI B92.1-1996 section 25 gives some guidance regarding minimum form diameter limits of external splines.

https://youtu.be/LOSyp2-crUY

Jpbingley, If you follow proper aerospace procedure for installing threaded fasteners, the actual number of installation/removal cycles of a self-locking nutplate (or "anchor nut") is irrelevant. The prevailing torque of an interference type thread locking feature, like the ones used on...

Ng2020, Did you check sec. 8.2.2.1.1 of MMPDS? Some discussion of allowables in fusion welded alloy steels.

doctorantons, Your question seems a bit odd. While it may be possible to join "a cast iron" material to "a steel" material using FSW, the question I have is why do you want to do this? Are you sure a fusion welding process is not adequate for your application? FSW is a solid state welding...

One important part of any aircraft design certification process is a FMECA. It is a standard approach for determining whether the documented design/analysis/manufacturing process/maintenance procedures/operating procedures/etc. comply with all relevant requirements/regulations. A proper FMECA...

In aerospace applications, the only time I would use lockwire is when a legacy component/hardware item specifies it. For new design I never use lockwire (or even loctite) since there are much better methods for securing threaded connections. One issue with lockwire is that it can create FOD when...

Might also consider reducing the shaft diameter between the bearing shoulder and the fillet weld edge. This might reduce the stress concentration at the bearing shoulder fillet.

ParthZala- Below are S-N curves from MMPDS for notched 17-4 PH cond H1025 bar, which may differ from your case. These curves are for AMS 5643 which is air melt quality material. AMS 5622 is a vacuum melt quality form of the same material, and would have better fatigue performance as EdStainless...

The OP description is a bit confusing. It sounds like the die is for producing the profile of an internal involute spline. The tips of the internal spline teeth can have a tangent/tangent corner radius up to 1/2 the tooth top land width. However, increasing the tooth tip radius also reduces the...

Might take a look at 2219-T81. Just be sure to keep sustained tensile stress levels <50% of yield strength to prevent stress corrosion problems. Below are properties in the weld joint and weldability rating. You didn't mention what temper your 5154 aluminum is, but I'll assume it's -H4. I...

matkaya, Here is a Gear Technology article that provides a method to calculate your spur gear face crown profile based on axial misalignment. Once you establish the face crown profile required, the article suggests using equations from Roark's to calculate contact stress based on your operating...

There are some rapid prototype processes that might be cost effective for your application, depending on the quantities involved. There are large additive manufacturing machines that build up material using MIG welding. It's lower cost than any other additive manufacturing process. For a small...

Tmoose, What is the reason for machining your hub from a forging. Is it to reduce machining time/cost? Is it to reduce the amount of raw material required? Is it to improve the material's metallurgical characteristics? There are vendors that can produce a hollow flanged hub forging fairly...

I had a couple lightweight, thin-wall aluminum DMLS part made by Xometry for an unmanned aircraft application, and they did a very nice job. Passed dimensional and dye pen inspection requirements. However, you will need to talk to Xometry about your specific application requirements. Put...

Many automotive rear end ring and pinion gears use hypoid geometry. Hypoid gears usually have modest tooth bending stress levels due to their curved tooth profiles. Typically they are limited by contact stress levels and/or scuffing/scoring probability. Increasing the pitch dia/pinion offset of...