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I decided it would be best to have a concave shape to the gear teeth, in order to maximize tooth contact and wear. So I made a fancy blank: Problem: The tooth count went to 78 and tooth contact with worm is not good due to the decreased tooth spacing. Tooth spacing is 11.4 tpi instead...

Sort of shop made solution. I have a 3" four jaw that I hold in the 3 jaw. Recently got fancy and threaded a steel stub to screw into the little 4 jaw, now I hold it in the 3 jaw by the stub. Bill

Could you give us some detail, either drawings or photos, of the governor and valve mechanism? Bill

I like it ! Bill

That link is of no value to a person wanting to make a worm gear without indexing. Requires gnashing (what I'm avoiding) No tooth calculation information (info I could have used) Says to use bearings to support the gear blank (not needed) Calls for hardening of hob. (not needed) Contains...

Turned the blank to 2.228", which is the calculated diameter for a 70 tooth gear. Here is the result: The short gnash is the start of the 72 nd tooth. Almost perfect. The gnashes were made by cranking in .050" after making solid contact with the hob. By solid, I mean unable to rotate the...

This is where is the gnashed teeth joined at one revolution. Looks pretty good, huh? And after forming with the full tooth portion of the hob. I'm very happy with these results, but the tooth count is not as predicted. The measured diameter is for 90 teeth, which gave an 88 tooth count...

Thanks chipenter. A very good place for me to start! Here is today's activity. Here I'm narrowing the tooth. Am using a .060" necking tool, taking a plunge cut, a couple of thou per pass. The thread cutting work all done. The left hand portion will be used to form the teeth. Cutting...

Everede is pricey but hard to beat if your looking for "conventional" bars. I say "conventional" because the bit is triangular. They are sharpened by grinding the end of the bit. No need to grind top and side clearance. http://www.use-enco.com/CGI/INPDFF?PMPAGE=227&PMITEM=377-6010 Bill

chipenter, I'm holding the blank on a 9/16" bolt, allowing the blank to rotate. My effort on the universal holding method. Here is todays "gear", made using a 5/8" - 11 tap. You can see things did not exactly come out even, and there are more teeth than calculated. But I was able to...

What we learned from todays failure: 1. The flute being "just barely" narrower than the gear is not good enough. 2. At this scale, we need to keep the rear of the blank from lifting. I had hoped not as the ball bearing thrust assemblies were not doing the job. Maybe no bearing on the bottom...

Well, its pretty clear you've never talked to an astrologist. By the by, I don't think that video counts. All evidence says the wheel was generated using the gnash and form method and the video documents the final step. Which is interesting. They were lapping in the wheel. As I understand...

Herbie, you got me to thinking. Checked into my tap collection. I have some 3/4" - 10 taps. The flute is about 3/8" wide and the 10 tpi should make a gear that is 2.29" dia, a workable size. Gotta see what tomorrow brings. Also have a 7/8" - 9, but I would probably have to make the blank...

Herbie, the 1" - 8 tap that I have has flutes 1/2" wide. The key to this process is continuous cutter contact with the gear. Maybe if I was making a 3/4" wide gear. Perhaps if I made a 3/4" wide gear and faced it off to 1/2". Whats happening in that video is exactly what I want to do...

Hate to respond to my own post, but I would like opinions about technique. After making the initial cut (1/2 tooth width) would it be better to go immediately to feeding in a full width tooth section, hoping that would help to even out any tooth spacing irregularities. I'm thinking that...

First of all, I'd like this thread to be a "how to", but I'm afraid the question mark in the title says it all. At best we will learn how to make one with any indexing. At worst, we will learn some things that will not work. The current state of affairs requires that a person needing to make...

It appears that for my purposes, the answer is "none of the above". Made a test gear using a scrap piece of aluminum. Made it 2.912", which should have made a 64 tooth gear. Taking an initial cut of .040", I got 66 teeth. Next step, make a blank that is 3.176" and see if I get 72 teeth. Bill

I've decided to try to make a 72 tooth worm wheel. I have made a 7tpi "cutter". The idea of the cutter design is too rock it back in forth in the lathe while feeding the gear blank into it to the full depth of cut, then rotate the lathe spindle 72 times, probably with a lot of rocking by...

It is common for washer motors to be reversible, as well as two speed. Reverse automatically engages a high speed drive train for the spin cycle. That makes wiring pretty complicated. That's all I know about washer motors. Bill

A word of caution. Talk is drifting toward providing (selling?) castings. That could easily get a fellow crosswise with state and federal air and water regs. The nature of the regs are such that non commercial activities are not covered, so if you can keep your neighbors happy, you are good...