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I when through Gearotic tutorials. Clearly this is a professional program and can take care of every issue. I was not clear if the two spur gear model that were made with the minimum input actually inserted clearance. Note typically the center distance is increased by some fraction of the...

I believe that all the gear programs do a good job creating the involute curves. What they seem to not do is to make the small changes that experts gear designers do. And that is expected because the coders are not gear designers. So let us say your making a planetary gear set, design three...

MathCAD is version like 20 so I can not use anything published in version 7. However it is a very popular program for people to use. A lot of masters papers are done using mathCAD for the same reason I like it. Great place to find the equations and method of solving them. You could use them...

MathCAD is a program to do math. I basically typed in the equations found at this web site or the handbook from Stock Drive Products metric gear book. https://khkgears.net/new/gear_knowledge/gear_technical_reference/calculation_gear_dimensions.html Looks nice but it just doing math. A few...

petertha: Gears with rolling contact, involute, doesn't care if the gear is external or internal. However, to mate two gears the tip of one should not hit the root of the other. When the internal gear model has a root radius on the tip clearly the software does take into account the...

I looked at the GearDXF program and it is really a spur gear pattern used to cut an internal gear. The reason for saying this is that the root radius is not in the correct location but where it would be on a spur gear. I use FreeCAD and it has the exact same approach but can export step...

You will find people on Youtube that build a lathe or milling machine. Even find David Gingery items built. In the background often is a commercial or hobby machine. Not so easy to build these machines without some equipment. I would find a club or people that will help and know...

View this youtube 'A Boring Rant.' He says the Chinese heads are reasonable with the set screw and adjustment screw of soft material. Replace the set screws. The Chinese carbide boring bars are crap; soft metal not tool steel, carbide not on the axis for the nominal zero rack position...

You can find a few youtube videos using a printable wax and PLA for investment casting. PLA leaves a residue in the casting. The printable wax is Moldlay by Lay-filaments.

I started with the free version of Granite. At work started with 2 D and switched to 3 D. Unigraphics, Pro E, Solid Works. For home I tried to find a free drawing package. As I said I started with Pro E's Granite and then Creo. Tried Iron, and On Shape. Others that I can not remember...

I have been using freeCAD for years now. On grabCAD I have posted a model of may atlas Lathe all built on freeCAD The difficult part was to find an open source program that would let me bring in Step files on individual parts so that I could output an assembly Step file. As I see your...

I assume you know that there is a wax for 3D printing of investment castings, moldlay by Lay filaments. I would go to the jewelry investment youtube posts to find comparable wax, Paul Manler: make a vacuum chamber by V0g PLA and other 3D print material leave a film.

Epoxy or Portland cement are both great binders for the filler and reinforcement steel. Epoxy is expensive which is why the concrete lathe is made of cement. Prof. Tyler Lay (www.tylerlay.com) and on youtube provides information on making good concrete. I suggest you see his youtube on...

goldstar31, so are you telling me the "strike when the iron is hot" is a myth? Please tell YOUTUBE black smiths. Both smiths I watch tell what function the flux does. As far as cold welding and explosion welding. My name is on a patent showing a cold welded housing. To improve conduction to...

My ~1940 vintage Atlas bench Lathe with 1/4 Hp motor can not put out the heat to stick Aluminum unless I am not cutting the metal but rubbing it. Then I shouldn't be even using the tool bit. I would think that anyone with an engine lathe would already have a need for cooling system. Ozwes007...

I would look at generators that people have built for small wind mills. Those are easy designs since most are built by hobbyist. An easy to use program to design your own in FEMM software http://www.femm.info/wiki/HomePage . It has been an open source FREE program that has existed for...

Thermal conductivity of aluminum 6000 series is ~112 Btu * ft / (F * hr * sqft) 193 W *m /(sqm*C) steel and steel ~ 27 Btu*ft/(F*hr*sqft) 47 W*m/(sqm*C). Thus the temperature of the aluminum part if small is ~ uniform where the chuck and tool with a small cross section has a significant...

The aluminum expanded due to heating and the tool you measured the diameter was cold in comparison. Thermal coefficient of expansion of 6000 series aluminum is 13.0 in/in/F 23.4 mm/mm/C both time 10^-6. The bearing is steel ~ 8.5 in/in/F 15 mm/mm/C also 10^-6. The approach that is used...

They typical mechanism for laying down a cable or hose is a reversing screw with a high pitch and a single short tooth that can change its angle to follow the path and long enough not to be caught in a track for the opposite movement. Bait reels has such a mechanism. However the cutting of...

I actually covered lathes from hundred Horsepower to down to jeweler's lathes with the web site and patents provided above. "I suggest looking at the lathes others have built. https://www.vintageprojects.com/lathe-milling-plans.html The Turret and Hobby lathe are good choices for starting...