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Ron, Yes, I do have 2 identities on Eng-Tips. One day a few years ago I was unable to log on because I forgot my password. I could not see any way to get on besides creating a new identity. I want to make the gears so they can be hobbed - this method is used by the largest number of vendors...

I have been asked to design double helical gearing for a 2-stage reducer. Gears are to be hobbed, so a gap between helical sections is required. Axial space is limited, so a design with one stage straddling the other seems appropriate, because one of the gaps does not add to the overall axial...

I'm in the market for a new laptop, hopefully for $1,600 or less, and hopefully with Windows XP. I'll be running primarily Internet browsers, email clients, SolidWorks 2006, AutoCad, MSWord, and Excel. My SolidWorks activities tend to be on the light end of the spectrum. I understand that the...

I am designing a spur gear set to be used in a remote controlled device. The output shaft gets exposed to nasty environments (salt water, grit, etc.) so must be SS. In the interest of reliability, keeping number of operations down, etc., I’m planning to make the output shaft/gear from a single...

I’m working on designing a seal to keep contamination away from a potentiometer in a greasy environment. The 1st pass was bare aluminum lightly spring loaded against Delrin 500. The surface roughness on the aluminum was about 63 micro-inches. Contact pressure about 7 psi. Action is...

I'm working with a small (64 DP) 5-stage gear train. Overall ratio is 591:1. Design load is 3.8 watts @ 6,000 rpm motor speed. Design life is 500 hours at this load, though it will normally be used at much lower loads. Motor pinion is 13 teeth, x = 0.6, Rc 58. Gear for this stage is 69...