I have a general question on flow through an orifice for varying temperatures/viscosities. For a given pressure drop and orifice size, intuitively I would expect a colder, more viscous oil to have less flow through the orifice than oil at temp. However from looking at the...
I have what may be a simple question, I don’t know if I’m just overthinking this. I am looking through the test data of Torque twist curves on a couple shafts. Yield and rupture torque seem more straightforward. However I would like to compare toughness between various shafts. I understand...
Hello,
Hoping someone could help clear up some confusion for me, or point me in the right direction. I'd been under the impression that for a helical gear, the true involute profile would be located in the transverse plane. However when specifying helical gears, pitch and tooth thickness are...
On prints I have seen hardness called out as value then scale, and as scale, then value. E.g 50 HRC, vs HRC 50. Is there one that is technically correct or is it generally up to the drafters/engineers discretion? Thanks in advance.
I am relatively new to shot peening, and have some questions regarding some parts I am currently designing that may need shot peening. I understand the general big picture of shot peening, but am getting a bit hung up on some specifics. Hoping this is the right forum for the question.
I am...
Not sure if this is the correct forum, but I'm trying to find the difference in terms of end results and capabilities for ASTM-B-650 and AMS2460A. I am trying to determine which spec to buy, and am having trouble figuring out the distinctions between the two. I wanted to see if anyone may have...
I have run into spool valves in directional control blocks, that are both case hardened, and hard-chrome plated. The spools are in very similar assemblies, and function almost identically. I am having trouble figuring out why some are case hardened, and some are chrome plated? I have looked...
I am designing a spring to be a replacement for existing springs. I have access to the existing springs and have tested them for load at height and measured key characteristics. I am working on a print to spec the springs to our vendor. It is a pretty simple/straightforward task, I'm just...
I have not been able to find a clear answer on this. Does the tolerance of a plug gage apply just to size, or does it apply to the form of the gage along its length, ie cylindricity.
I know that a size tolerance should imply from, but I thought at least some plug gages were centerless...
For high pressure, directional control valves, I have read that the diametric clearances from spool to bore are generally around .0002"-.0006". I was wondering what this refers to? Would this be both the spool and bore at maximum material condition? Or is that just the clearance based on the...
Hello, I am a mechanical engineer, could use some input on metallurgical capabilities.
I have a round part that has diameters from 3/4", which are critical, down to less than 1/2". I need a deep case, around .06" on the critical diameters. I am looking to case harden, probably either...
Hello,
I am a relatively new graduate, and have been working as a design engineer. Most of my experience with metallurgy has come from school, and that has been relatively limited. I have a general understanding of what the processes of carburizing and carbonitriding entail. As far as the...
Looking for some insight in how to effectively measure tight tolerances of less that +/- .0001" for parts up to about 3/4" and others up to 1.5" in diameter. We've been looking at some laser mics (Mitutoyo 503S and 9506), however looking at the size range needed the linearity error takes up...
I'm a recent grad and relatively new to the automotive industry. I've been given an outer race for a one way roller clutch as one of my first projects. I'm hoping someone here may have some insight that may help me. One of my primary concerns for failure of the race is from the hoop stress...
