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FreeCAD has an architecture workbench. Cost nothing and if typical of the other workbenches there will be many tutors on using it so you can see what it can do.

This is the only other file on types of collets. Maybe this may help

I hope this helps it is a list of dimensions of collets.

The choice of the iron is greatly effected by the frequency of the changing magnetic flux and the the electrical frequency. For 50 and 60 Hz carbon steel doesn't present a big increase in losses. Aircraft magnetics at 400 Hz us silicon steels. And for higher frequencies the choices of...

One time years ago when I worked for an aircraft generator manufacture, I am a mechanical engineer. He said the relationship of peak voltage is a cubic relationship to speed. Peak voltage occurs at zero output current. Thus trip the generator breaker the wires see peak voltage. Power...

The best way to learn complex software is to actually talk to a person that knows the software. I did this for Pro E and Unigraphics. With that background it is easier to learn other programs. The next bet is software with tutor videos on every aspect of the software. FreeCAD has a lot of...

The O-ring in the space shuttle booster rockets were Viton with packing materials trying to prevent the hot gas from touching the O-ring. Leakage around the O-ring resulted in burning of the O-ring and failure. Internal combustion temperature and solid propellent temperatures are similar...

I to have been a user of FreeCAD from ~14 you can see my drawing of an Atlas F lathe on GrabCAD library. I agree with what you say. I am using the sheet metal work bench right now. It took a little time to learn how to use it. basically do all the folding and then cut the holes in the faces...

I use the web site for Helical Gears which actually has an extensive technical information. Gears will be locked up if they are cut to the ideal dimensions and placed at the ideal center distance, add the pitch diameters. In practice the distance between centers is increased, the added...

A free 3D design program that has gear modeling including bevel is freeCAD, windows, mac, and lenox software. When the software is loaded go to tools and at the bottom add on managers. I have used the STL model from FreeCAD and built and sliced them with Cura and printed them on my Tovo...

freeCAD 18 has a work bench to design gears including bevel gears. covers all types of gears but you may want to start with a tutor on spur gears the text for bevel gears FCGear BevelGear - FreeCAD Documentation. I have designed gears but have not printed them, however. Pete...

I just viewed the Potts Milling attachment for a lathe mounted to the cross slide. I have a desk Rong Fu RF40 milling machine with a vertical round column like the Potts mill. This means that you can not raise the mill spindle while cutting with the Potts device which limits my use of the...

Cycloidal gear also need clearance. Often more then one gear set has contact in involute gears then Cycloidal gears from what I have seen. This maybe wrong. When more sets of teeth contact then the tolerance of between teeths are important. Thus one reason for noise gears is this error...

The manufactures of o-ring have tables Parker is the best guide that can be down loaded. Other companies have better information about calculating the dimensions and can be down loaded. Didn't find a calculator the last time I looked.

The .008 error to far may not be a problem. I had to assemble machined gears that were to the involute dimension and the center distance the sum of the two pitch diameters. THE GEARS DIDN'T MOVE AND WERE HARD TO EVEN MATE. I used a sand blaster to wear away the surface to get clearance...

Trigonometry will change the tooth cut when the two axis are not parallel. Image cutting a helix gear with a hobbing tool. It's proportions do not change, just altered by trigonometry. The pitch dimension is also altered by trig, everything changes by the sine and cosine multipliers. Thus...

Here is something to visualize. Think of the gear made up of thin pieces of metal foil like a motor lamination. The mating gear is also made this way and every piece of foil in one gear has a corresponding foil sheet in the other. Thus every pair is a thin spur gear. So what is true for a...

Still plenty of casting opportunities remaining if only the none moving bed for a lathe or tower for a mill is made from concrete. Often to use aluminum the DIY equipment doesn't have the capacity of metal needed, so have to break the base up into parts. Post tension and using fiber mixes is...

I am really interested in using concrete instead of aluminum. Trade off is weigh for stiffness and much easier material to work with since you do not need a furnace and source of aluminum. J. V. Romig published in Popular Mechanics a concrete bed lath 6 in Turret Lathe SN23. The rest is...

Actually the contact of a helix gear is the same as a spur gear. The difference is that a set of spur gears contact on a line at a particular radius for each gear. contact at best moves from the tip to the bottom near the root and then back out. Helix gears due to the helix could have a line...