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You're Welcome. I knew someone could benefit from passing it on. Easy to forget that the Auto makers have been at it for a long time now and there's lot's of spare parts out there. Rich

Hi, Today I had to pull the driver's seat from my daughter's 1999 Honda Accord to change the seat belt clasp. While I was setting the seat on the work bench upside down I noticed the very nice aluminum extrusions Honda uses for the seat rails. In comparison to my 9x20 crosslide dovetail I'd...

Thanks for taking the time to share the process. A good reference with real world problems and solutions. Regards, Rich

Several years ago I had the same problem. After exhausting all the usual remedies, I finally had to call my Father. I brought the cylinder head over to him. He tried a dremel (he was beyond 80 years old then) to no avail. Finally he broke out the oxy-acetylene torch with a small burning tip. It...

Do you have to provide holes for the cylinder openings on the top of the crankcase patterns as shown in your 3d mockup? Rich

Here's a sample output... Edge view same gear...

Nice job Jason. I've read about pattern making and casting, but never have tried to do it myself. It makes a lot of sense to put your time and efforts into the patterns, so that you can recreate items at will. Someday I know I'll try it too. Need a shed just for the patterns. I doubt you can...

You're right Al about the hob position, but this screen shot was taken after I interrupted the program. The hob starts out as you describe but then moves along with the gear as it rotates in unison. To better describe the motion...I try to move the hob along as if it was a threaded type of hob...

A 60 tooth 20 degree PA gear hobbed with 3 passes and Rendered in 3D... Same gear zoomed in... So I guess these examples show that with some additional passes you can produce acceptable gear tooth form using a straight hob as shown by "Hobbynut" on Youtube. You just need to move the hob a...

I think working with, and learning to use a CAD system is extremely useful for anyone that wants to build something. It's not always easy to learn how to draw on a computer, but if you can overcome the initial concepts of using x,y,z coordinates and object snap tools, your drawings and work...

It's raining here, so a good time to draw. This picture shows a perfect gear with a hobbed gear laying on top of it. The hob used was a 1 DP 14.5 degree PA straight tooth hob with the tips filleted to .157" radius. 5 passes (or flutes) were simulated here. This is the plan view of the...

George, Here's another screen shot. The program works well and I've been altering the hob(s) based on research and trial and error. My focus has been centered on reducing "undercut" on low-count pinions. I have an older program I wrote that draws theoretically/numerically correct involute...

Has anyone out there tried to automate gear drawing in 3D? I've been toying with a few routines to draw: Spur gears (internal and external) Helical Gears Miter gears The basic idea so far has been utilizing the concept of "straight tooth" hobbing to generate the tooth profile... Draw the...

Yeah, must be Global Warming making it so cold in Idaho I guess?:o

That's really nice Alan! Professional quality work. Overkill...yes. But I like it. Rich

This may sound corny, but on my X3 mill I use an old 12v wiper motor powered by a cheap 12/6v battery charger connected to an old (dead) motorcycle battery. To get slow speed I use the 6v setting and speed up by selecting the other 12v settings. I have two toggle switches; one that holds it's...

I have the Ubuntu FreeCad version too, but haven't been able to use it due to my video system is not modern enough to support it. I normally use an old DOS version of AutoCad ver 11 running in DOSBOX within Linux. Eventually I'll upgrade my video card and learn to use FreeCad. It looks...

Matt, Check out this site, he hosts all kinds of stirling engines made from Tin Cans... http://www.boydhouse.com/stirling/ Rich

John, On my Harbor Freight BV 920 the carraige clamp is on the right side of the carraige. An allen screw. It's roughly straight above the threading dial and to the left about an inch or so on the top surface of the carraige. If you visit Steve Bedair's web site he has some nice mods he did to...

Thanks Cobweb, I don't know why I didn't see that. Rich