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Robocopy is made for exactly this sort of thing. It's included with Vista & 2008 and can also be installed on 2K, XP & 2003 http://www.microsoft.com/downloads/details.aspx?familyid=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=en Steve Eichenauer, Inc.

According to my Machinery's Handbook, the dimensions and gaging depths for english cross recesses of machine screws should be found in ANSI/ASME B18.6.3-1972, R1991

Just make your spur gear infinately thin and it will work fine [wink]. Seriously though, you could try to make several very thin spur gears & stack them together, rotated according to the worm lead.

If you're planning to heat from the outside as you describe, to heat the oil will require: BTU=(Vol X Density X Specific Heat X ?T)/t where: Vol is volume in gallons Density is in lbs/gallon Specific Heat is in btu/lb/°F ?T is temperature rise in...

Thanks for the info & help. I will check out the products that you've suggested & try to figure out how to incorporate them into what I have. And just for the record, I didn't pick this - I just inherited it.

Thanks for the info. We're using the 'stock' matching heat sink with thermal paste. There are fans at each end of the heat sink- one pushing, the other pulling. The heat sink is slightly above room temperature, but certainly not what I'd call hot. I'll take a closer look at the cci product...

I seem to be having a problem with a recurring Crydom D53TP50D ssr that I'm trying to diagnose. This problem is outside my scope of knowledge, so any advise is appreciated. The application & history is: This is a drying oven where the load of the SSR is a 208V 18KW heater assembly controlled...

Yes, scarecrow55 that's where I was going - face width, helix angle, shaft shoulders & other physical limitations. I'm aware of what it is & how it's used, I just was making sure that's what we were talking about before pointing out some of the possible limitations to using it. asong, for odd...

I did this for several years and unfortunately longer have the information readily available, but I am 100% confident that using pins or wires to measure a helical gear with odd numbers of teeth will give an inacurate measurement. It might be 'close' depending on pin diameter, pitch & pressure...

Pins will give you an incorrect measurement because the contact point will not be through the spherical center (and consequently the tangent points of the profile). For convenience, measuring 'balls' are often made like dumbells - balls with a fixed length rod between. This helps to set them...

You can also use the Left & Righ functions as needed. Steve Eichenauer, Inc.

I agree with ewh - .0001 is referred to as a 'tenth' because the traditional division of a manual inch micrometer is .001" Therefore everything is spoke relative to that 'unit' of measure - so 1/10 of that of 'that unit' is .0001", 10 units is .010", 100 units is .100" and so on. Steve Hebert...

Please clarify how and where they are out of proportion. On the display screen, on a print-out, or mathematically?

Skunkmilk has discovered the 'eliptical gear sets' are not truly eliptical. Take note of the text in the graphic on the cunningham links above - Eliptical Bilobes. If you model elipses with a very large major axis and a very small minor axis and roll them together on a fixed center distance...

http://www.cadkey.com/company/press/IMSI_acq.asp http://www.caddigest.com/subjects/cadkey/select/grabowski_imsi_buyout.htm

Chopping the wave form shouldn't be a problem. This is not an uncommon thing to do. Glowing "dull red" will limit the life, but generally shouldn't be too detrimental. The heat cycling and element design may be the greater problem that is limiting the life. Every heating element...

How about sin(45°)

Yes, select the cell (or range of cells), right click, Format Cells, Number tab, change Category to Number, adjust number of decimal places, OK

gearman1234, it is not a software problem exactly and it's not a mechanical problem exaclty. It is really a geometry problem. I don't know this machine, so I can't give specifics. What you're seeing is commonly called trailing side rub. Some of the contributing factors are gear geometry...

It depends on exactly what you're looking for, but one of my favorite places to start with the basics is howstuffworks http://www.howstuffworks.com/power.htm Be sure to check the additional information links for tons more related info.