Gingery Dividing Head - Machining the Worm Gear P3 (Hobbing and Finishing Worm Gear)

looking good hope to maybe some day do the same.

Interesting stuff bro. Thanks Anthony Kent

thanks for sharing

I'm loving it Chirpy, but what I love even more is your enthusiasm to make something from nothing, even showing when you stuff up. Believe me I've seen some very big and expensive stuff up's over my time. The antics to cover up these 'stuff up's' and the games played to lay the blame to others also become's unbelievably expensive and time consuming.
Cam

Very interesting Chirpy. Keep on keeping on. You'll have a dividing head in no time.

I knew you'd get the setup figured out. Nice job by the way. Are you making dividing plates for this as well as the dividing head? I'm definitely going to remember the left and right trick too. Thanks for the video, it's good stuff!

You are leader in repurposing. Enjoy that you show it warts and all. I learn more from mistakes than success. Now Frodo on to the hobbing.

Dan

Newbie question, the concave face of the teeth, did you turn that into your blank or did the hob form them? How did you affix the hob to your shaft? Did you glue it with superglue, loctite??

Joe

When I made a rotary plate back in the 1980's, I had to gash the teeth, using the vertical mill. The gash is always a reflection of the worm. you should have just cut the worm left handed to match the gash direction. About 10-12 teeth on the hob would have speeded up the hob cut and reduced the heat due to rubbing. The worm gear that you cut, is called a nested gear. It's in full contact for about half the depth of the worm, and transmits power with the sides as well as the bottom of the worm. Very nice job cutting (gashing ), the gear. Especially since you cast your own blank.

its amazing what a hob will do to a brush

After cutting the tooth profile you should have relieved to just just behind the cutting edge. This would have minimized the rubbing, which translates out to heat.

support your hob with a centre at the other end.