Making a Set of Helical Drive Gears for the Hobbing Attachment Project

[@thaiexodus2916]

Every time I see a shop like this and a machinist like Tom I silently hope he had or has an apprentice to pass on those skills,

[@thomasstover6272]

@@thaiexodus2916 Thanks, but you have it the wrong way around: I am the apprentice, and the Universe is the master. Very kind of you, my friend!

[@thaiexodus2916]

@@thomasstover6272 👍👍👍 Having had a surprise honorary masters degree awarded to me for a subject I had very little formal education in, I know exactly what you mean. All about innate curiosity and receptivity coupled to a drive and desire to explore and expand a persons knowledge and skills. In a motivational class a lecturer left me with an indelible memory, "Reach for the stars and make one of them your own,"

[@MyLilMule]

I'm still so impressed behind the engineering of the hob machine. I know it's essentially math, but to turn that math into a mechanism that actually makes things is pretty cool.

[@thomasstover6272]

@@MyLilMule Thanks, Greg! Making things is the best fun, I think!

[@jkdwayne]

That is a beautiful Hobb you have built. Not many of you guys capable of doing that left.

[@markfischer9216]

A very nice job, and no unfortunate crash. Amazing what can come out of a rabbit hole.

[@ianmoone2359]

Magnificent! So envious of your knowledge & skills. I’m old but new to machining metal. I bought a 1952 Bridgeport J head mill a couple years back & it came with the horizontal 90 degree head and bushing support arm & arbors & banjos & gears, & dividing head etc to be able to cut helical gears, but I lack the knowledge & skills yet to be able to consider attempting anything of this nature yet, but I love watching those who do know what they are doing demonstrating the techniques. You’ve earned a new subscriber. Thank you sincerely for your efforts from here downunder. 👍👍👍🇦🇺

[@thomasstover6272]

Thanks, Ian! Welcome! It sounds like you have everything you need to make a start! It hasn’t been that long since I was where you are..a bit of machinery and not much knowledge. Have a go…

[@wino4340]

Excellent work!

[@didierdudu7910]

Hello, very nice work!!! very nice assembly!!! very nice machine!!! finally everything is great it makes you want to do machining good continuation!!!

[@MattysWorkshop]

Gday Tom, I always throughly enjoy episode, the 2 gears do run very quite and smooth, truly looking forward to the next instalment, cheers

[@thomasstover6272]

@@MattysWorkshop Thanks, Matty!

[@joaolucasvieira2979]

Amazing work as always! No wires just gears, as things are meant to be cause mechanical engineering always looks cooler than electrical engineering and that's just fax 😂

[@thomasstover6272]

A reasonable person might think so, but I couldn’t possibly comment. 😊

[@didierdudu7910]

Bonjour, très beau travail !!! très beau montage !!! très belle machine !!! enfin tout est super cela donne envie de faire de l'usinage bonne continuation !!!

[@thomasstover6272]

@@didierdudu7910 I’m afraid I don’t speak French, but I understand exclamation points!!! Merci!

[@NightsReign]

OOF! How often does this happen? 8:45 👀 Is it possible to relocate the E-brake button, because that looked painful?! (EDIT: Oh nvm...that's the everything panel...) Being 6'5" myself, I can definitely relate.

[@thomasstover6272]

I didn’t notice that! I evidently have a remarkably hard head! 😂

[@stovepipe666]

Nice work looks well

[@thomasstover6272]

Thanks!

[@thesjyoungjr]

You asked for what r thought of this format. I see more than a few talking of your expertise, and yes, you are very good at what you do. But for me,I don't really care for the music. I enjoy the explanations and the sound of the machines. If I mute the music, I lose the machine background. I do realize that others might enjoy this, but you did ask. So that is my two cents. 😊

[@thomasstover6272]

@@thesjyoungjr Thanks, I appreciate the feedback! I like the sound of machines working, too, although it can get a bit loud sometimes!

[@anthonyjorda5539]

Tom, I really enjoy watching and listening to you and your explanations. I spent 37 yrs. as a machinist and did lots of horizontal milling work but never learned anything about gear cutting. One question: when you swivel the table to 30 degs. you don't have to change the Y axis centerline? Thanks in advance and Continued Success!

[@thomasstover6272]

The centerline of the swivel is roughly lined up with the center of the hob cutter and the work axis is centered over the swivel also, otherwise there might have to be some correction on the Y axis. The table angle mostly sets the helix angle, although I have to switch the lead correction from right to left hand. The helix angle of the hob “thread” is 2 deg and that has to be subtracted from the gear helix for RH gears and added for LH gears. Thanks for watching, Anthony!

[@billdoodson4232]

Tom, does the change in angular velocity of the two universal joints on the drive shaft not effect the finish of the final gears? A possible upgrade to CV joints?

[@thomasstover6272]

@@billdoodson4232 The driveshaft variation is diluted by the 40:1 ratio of the final drive worm set, so my assumption has been that the effect is negligible. Correct alignment of the joints, matching the articulation angles, and keeping the angles as low as possible also helps. Thanks for the comment, Bill!

[@TheJohndeere466]

I usually take .200" depth of cut on my hobber but I am usually cutting 5 or 6 Dp 25 degree pressure angle.

[@Belar.usinagem]

Friend, please help me understand this mechanism that allows me to stir without the helical screw coming out, I want to build one like this here on my machine

[@bryanlatimer-davies1222]

I was always told to tighten and loosen the nut with the overarm support in place to avoid straining the spindle. Is this correct ?

[@thomasstover6272]

Probably! Makes sense…

[@didierdudu7910]

Il suffit de faire la traduction 😮