Prior to Computers & Encoders -- Change Gears Programmed Machines - The Double Reduction Gearbox

[@sarahdelacruz5208]

this channel has joined my list of "channels with great content and i can actually learn something from them" list.

[@EvolventDesign]

Thank you, stay tuned as we have a lot in the pipe for 2022

[@joell439]

Fascinating. I appreciate the lesson. 👍👍😎👍👍

[@seimela]

No explains this on the net except for you ❤❤

[@EvolventDesign]

Thank you for watching. It is an interesting topic that is worth the discussion.

[@impactodelsurenterprise2440]

I have a cnc lathe with c axis live Tooling. The hobbing attachment for it cost up to 5 digits for the brand name ones. Can't believe there are so expensive, probably because of the precision spiral bevel gears and bearings I don't know. Are CNC lathe a good platform for producing gears with such attachments? Or better off just sticking to a gear hobbing machine?

[@EvolventDesign]

It’s a great question, let me answer two different ways- 1) from a business standpoint, deliver what customers are asking for and will pay for. Lower quality gears are in many types of high volume demand - agriculture- etc. before paying for the attachment secure a contract to pay for it with a big job. But that is a lot to line up. I find low quality gears have lower profitability-- unless the volume is really large. Your CNC - gear attachment combo is the right stuff for volume. 2) From a process, technical and QC standpoint there is nothing better than a hobbed gear. They will make a gear that the CNC/attachment cannot. Done correctly and maybe hardened and ground - they don’t get customer complaints. With quality equipment (yes old with a rebuild and tuneup-can be very high quality) and without spending a fortune you can get great name brand bobbers like barber-Colman, Mikron, Pfauter, fellows…. You know what can be done if you are willing to figure it out. Just my opinions here - I am sure others could have some good input as well.

[@impactodelsurenterprise2440]

@@EvolventDesign Thanks that's a very thoughtful reply from both a needs and wants point of view. The biggest advantage of using a live hobbing attachment for my cnc lathe is that I'm not constrained by limitations of change gears availability in a gear hobbing machine. An endeavour to possess all the change gears to cut every single tooth number out there would require an investment might cost more than the machine itself! Another advantage with the cnc lathe is that the main spindle and live spindle can be synchronised in resolutions of only few arc seconds, which translates to very accurate pitch produced on the gear, notwithstanding other variables of course. I can also finely tine cutting speed without affecting the turning ratio. I think gear crowning is also a possibility with cnc? Haven't figured out the kinematics of crowning, is it as simple as creating an arc motion in the z and x axis?

[@seimela]

That's true ...I have noticed CNC gears have bumps on the surfaces ...This could be because the machine is not solid or there's vibration

[@TheKnacklersWorkshop]

Hi Andrew, An interesting video... that did make sense to make spares for all machines when making something for one... Take care. Paul,,

[@EvolventDesign]

Thanks 👍

[@kooldoozer]

Hello Andrew, What a mechanical wonderland ! Love the idler shafts and that quadrant. In lathe terms I have heard the quadrant called a banjo, I guess because that's how it kinda looks. I probably have 20 Jacobs chucks in varying conditions. I need to highlight them in one of my videos so you can have a mini-tour of them Ha ! ! I am looking for a jaw rebuild kit for an old style 20N that I have. No kits on ebay right now. I guess I could take the jaws and find the angle, and surface grind them. Might make a good video.-----Doozer

[@EvolventDesign]

Yes, the angle of the jaws would be good to know and measure. Let me know what you get, I will do the same.

[@Bartolobot]

That part at 9:40 he said he didn't know what it's called. I think it's known as the "Banjo". Can anyone confirm that?

[@EvolventDesign]

From the owners manual:In German Zwischenwelle and translated to english as "Stud Shaft". The best online German-English dictionary for technical gearing is at Gleason Corporations site: www.gleason.com/en/encyclopedias/gear-encyclopedia On manual lathes and other machine tools it is known as a "Banjo" or "Scissor". So yes, you are correct.

[@EvolventDesign]

Thanks for watching

[@ahmedoahmedo3141]

hello, please manual service instruction Pfauter p251

[@EvolventDesign]

Try here www.lathes.co.uk/pfauter/

[@dizzolve]

ooo Hobbing. Thanks for posting. I hope you can build that jacob's chuck key :)

[@EvolventDesign]

That would be cool!

[@dizzolve]

@@EvolventDesign Yeah sure would. Would your machine there cut a helical gear? ........and for that matter it's actually semi cone shaped too isn't it? For that jacob's helical chuck key. I swear I've spent hours sifting ebay and google looking for one ........ I bet they'd be somewhat in demand on ebay......... I'd buy one. Even if not hardened

[@EvolventDesign]

Yes, the RS00 will cut a helical gear. But not a bevel gear. A bevel gear of any kind requires a completely different machine.

[@jsteifel]

I assume that's called a banjo like on a lathe.

[@EvolventDesign]

My RS00 Pfauter owners manual does not give it a name. But a review of documents from a larger Pfauter machine manual yields the name "Stud Shaft"

[@EvolventDesign]

In German Zwischenwelle and translated to english as "Stud Shaft". The best online German-English dictionary for technical gearing is the Gleason Corporation site: www.gleason.com/en/encyclopedias/gear-encyclopedia On manual lathes and other machine tools it is known as a "Banjo" or "Scissor".

[@sajjadbhutta6452]

101 z index

[@sajjadbhutta6452]

101 z