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@cuky2000 - Thanks for the input.

NESC 127 D. - Refer to NFPA-30 and NEC 515.1-3.

Have an existing substation and looking for numbers on how close a rail loadout of diesel and other fuels can be placed in proximity to it.

Makes sense, same advice I have received from my supervisor. Take the one you have the best chance of passing. Then as I learn, do and wean ourselves off our consultants, I would feel competent enough to seal any design related to substation and transmission within reason. The prior civil...

Mechanical engineer hired to replace a Civil at a utility coop. Involved with substation and line design. Passed the FE, now what PE should I take? Mechanical Machine Design since it was the field I studied and worked for 5 yrs? Civil Construction, more relevant, though will only utilize a...

drawoh, Attached is a screenshot. From your statement I am guessing we add a profile tolerance and relate it back to the primary datums along with a parallel tolerance to the opposing face or a perpendicular tolerance to the hole?

I have a cast part with a square counterbore on the the backside of a hole so the nut will seat against the face. I am working on getting my GD&T skills up to speed though wondering the best way to define this feature? Can you still use a diameter position tolerance just as you would with a...

Correct dhengr... I am at the forefront of a redesign and am not using slew gears to have 360 degrees of turning at each track. I just want to make sure my stance is narrow enough with plenty of turn angle at each track (cylinder stroke) to guarantee the machine can match whatever software or...

Thanks 3DDave. Makes sense... you can even see it watching the Gomer video.

Curious if anyone knows how to calculate the turning radius of a 3 track machine, such as a curb and gutter slipform paver?

Anyone have a good source for assisting in calculating HP or torque required for screw augers? My application is an auger for the front of a slip form paver. 18'' fight, 6'' tube, 45-60 rpm max, metering concrete in an open trough concept, so pushing material over material. Overall length is...

Pretty much trying to replicate this concept, though for a wider width paving pan that carries additional weight. Its a self supporting crown mechanism and more or less pries the pan apart raising the center and flexing a 3/8'' plate at the bottom. Kit is roughly 45k lbs, hanging from two points...

I need to size a chain and sprockets to pry apart roughly 50 ton. I am looking at using 4 - 2'' ACME screws (2 LH, 2 RH) driven in the center with a high torque hydraulic motor (capable of around 10000 in*lbs) coupled to two sprockets. I also want speed to be fairly controlled through the gear...

@racookpe1978 ... Good questions. They are for the rear of a machine with a pretty hefty cooler fan sucking air across the engine and blowing it through the louvers. The current design was using 3/4 #13 expanded metal across the opening, though has been decided louvers would look more appealing...

I have to calculate the free area through a set of 14ga 30-45 degree louvers and not sure what to take into consideration. It has to be more than just subtracting the area taken up by the material thickness isn't it? How do you take the bends into consideration?

Looks like most of those grooves are with a radius nosed tool, some v-grooved. I was just questioned whether shape of concentration had much of an affect on shear angle and couldn't remember all the specifics from materials and mechanics of materials or if it really mattered in this instance as...

Its a through hole with a nut and just this bolt will fail if a hinged assembly takes an impact, this bolt needs to shear to limit tearing the assembly up. So really its a mild arc that will shear the bolt. Right now I have the stress groove located in the slight gap between the two plates.

What would be the preferred groove (radius, v, or square the cross section) for inducing the stress concentration into a shear bolt?

Preferably weld with a MIG and wire. So recommended gas mixture and wire.

Thanks... I guess backing up a bit, if hardness and wear isn't an issue, but just want something relatively strong to weld to using typical wire... what low carbon grade would you select?