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Tools, Glorious Tools! #10 (Part 5) - Shop Made Gear Cutters - Tooth Fillets & Edge Cases

🕑 Added 2020-09-06 00:03:23 +0000 UTC

Comments

Clickspring

Excellent mate, so pleased :)

Joshua Greer

Amazing! Learned so much from this series. Stayed up way past my bedtime, was so helpful.

Clickspring

Hi Karl, yes that is correct. However it is a small variation when considered within the collection of other compromises already accepted as part of the underlying standards. The reality is that even commercially produced gear geometry is a compromise, balancing the 'ideal' against machining convenience - Cheers :)

Karl Mansson

By presenting the circular cutter at an angle to the work, are you not really presenting an oval and not a circular cutter? Maybe I'm missing something here but it seems like it would produce a different tooth profile. Same would go for the button cutters I think.

Kirk Jensen

The round bottom cutters don't seem to cut on the return pass. im trying to verify that in my head with the square corner not passing down the tooth wall.

Hogtown Pens

Makes me wish I had machining tools! I'm a woodworker but greatly enjoy your videos - this seems like it would be a terrific way to make one's own router bits for shaping and profiling wood!

Ralph McCoy

Thanks, I am glad the machines do not win this one. Stay safe Ralph

Clickspring

As of right now, no. There are several ways to get a CNC machine to roughly approximate it, with a drag tool, and in some applications using a very small rotary tool, but its a different result to hand pushed bright cut engraving. Cheers :)

Clickspring

Cheers PJ!

Ralph McCoy

Chris, when you were engraving the card press can that be done with a cnc mill? Ralph

PJ

Wonderful Series Chris! Packed with info, practical application and your camera work (framing and lighting) on this last one is some of the best out there, especially with the tiny stuff, Bravo! Much appreciate and logged for absolute reference. Thank You!

Timothy Girard

Thanks Chris, See you there 3 PM PDT for me. (Greetings from the Bay Area)

Clickspring

Hi Tim, so pleased to hear that! I'd suggest that you head on over to the Clickspring Discord. There are plenty of folks there that will offer some thoughts about where to start learning. More info on how to connect to Discord here: support.patreon.com/hc/en-us/articles/212052266-How-do-I-receive-my-Discord-role- The best time to come and say G'day and catch me and a lot of Patrons at the same time is Sunday evening/Monday morning at 2200 UTC (6pm Sunday EDT, 8am Monday AEST) Its a weekly chat, lots of sharing of questions, answers, what's been happening in the shop etc - Cheers :)

Clickspring

Sounds good, catch you both in the DM's

Glenn Trewitt

Actually Chris, that's backwards. (a) We like to focus on the user, so the ID string should be tailored to be clear and useful. (b) The coding for this is pretty easy. Ugly, but easy. For collaboration, I've got this uploaded as an XLSX in Google Drive. So, the right thing to do is to decide on a ID format for each of the cases you've outlined and start from there. I'll DM Chris with the URL, and he can DM you, Brandon.

Timothy Girard

Hey Chris, I have completely fallen in love with this channel. I just purchased a lathe and I'm a little apprehensive. I was wondering if you or people here could offer some educational places I could go and or some basic setup tools for my new lathe. A Grizzly variable speed 10X22.

Clickspring

Hi Brandon and Glenn - Many thanks for your help with this. Long term, I'd like this to be an open source object shared and managed by the community on the new platform, so this is a good place to start. The data differs slightly based on the gearing system. For the Involute, generally the following is recorderd on the cutter: Module/DP Cutter Number (or teeth range) In-feed for use Pressure angle For Cycloidal, it differs based upon whether its a wheel or pinion cutter: Wheel - Module Pinion - Module and Number of teeth It might work best if Brandon makes a start on the code and we then work on the presentation/layout together? If you're ok with that Brandon, DM me here on Patreon and I'll send you an unlocked copy. Cheers, Chris.

Glenn Trewitt

Chris - As Brandon asked, what are the key parameters that define the gears that a cutter makes?

Glenn Trewitt

And some "if" to customize based on which system is being used.

Brandon C. (Keronin)

Hello Chris, I want to start with that I love all of your videos. You make me wish I had something I wanted to make in a machining shop. I also love Excel, and if you had an idea of what you wanted a label to look like (or perhaps several variations), I could whip up something for you, or guide you in the creation of such a thing. To get you started, however, a super basic overview of how I would go about an automatically updating label is to use the CONCAT() function, and having it reference the cells that contain the information you want listed on the label.

Clickspring

Thank you mate!

PeetieGonzalez

What an absolute delight to watch. I'm glad you've been posting this series to keep us entertained and educated. Now you have your research published I'm absolutely dying to see a continuation on the Antikythera mechanism. It will be interesting to see the research informing the parts making process. The final product will be fit for a national history/science museum!

Clickspring

Hi Glenn, yes the calculator can be downloaded from the link beneath each of the videos. I like your idea of a label generator. I'm not overly skilled at driving excel so open to suggestions as to how this is best done - Cheers :)

Glenn Trewitt

I'm a stickler for documentation at work, so I have one suggestion for your gear calculator: generate a label for the geometry, suitable for stamping on the cutter or otherwise labeling it. Uh, and is the calculator publically available? It's nice to watch straightforward videos that make me realize how much I don't know. :-)

Clickspring

Glad you asked! Here are some of the reasons why you might want to make your own gear cutters: 1./ Cost. The horological gear cutters are approx £70 each, with several required for something like a standard clock mechanism (plus the escapement & ratchet cutters), and no readily available substitute that I am aware of. The shop made process makes this cost trivial, and removes a major barrier to starting a clockmaking project. 2./ Quality. While the Involute cutters can be found at a cheaper price than typical horological cutters, you do indeed get what you pay for. My observation is that the cheap cutters are of poor quality, particularly at the low module end of the scale. The cost of the good quality HSS involute cutters approaches that of the horological cutters. 3./ Availability. Commercial cutters are provided at specific sizes that may not meet your needs. Involute modules below 0.3 are likely to require an expensive custom order, and the same would apply if you need a one off pressure angle, clearance, bore etc. With shop made cutters you can specify all parameters and make it exactly to your needs. 4./ Protoyping. Despite the value of CAD, its often not clear whether the scale of a project is correct until you actually make it. I have a project in prototype at present that fits into this category, where the scale is quite a subjective thing and I really need to see it in use for a few months before committing to the final design. I've run through 3 iteratons so far, each requiring a distinct set of cutters, all odd modules. This would have been prohibitively expensive if going commercial, but its negligible for shop made, and encourages continued experimentation as opposed to 'that will have to do'. 5./ No Supply Delay/Disruption. In my part of the world (and I suspect this applies to many others), there is no option to walk into a store and buy gear cutters. Its all delivery by post with many weeks delay before delivery, and in some cases months. If you are working on a repair job, that means the device must sit in the shop waiting on the arrival of the cutter. No such delay for shop made cutters, knock it out, and get to work completing the repair all inside a day. 6./ Satisfaction. There is nothing like the feeling of achievement that comes from completing a demanding project, knowing that even the gear cutters were shop made! No doubt there are more reasons, but I'd reckon there's something for most of us in the list above - Cheers :)

Clickspring

Terrific to hear that Lee :)

Lee Marsh

enjoying these videos. Much of it is very useful for my model making

Iain Deas

Hey Chris. Question for you on commercially made cutters, you mentioned the PP Thornton cutters being in the £70 region in another video and I know that generally speaking you get what you pay for, but, If you’re only looking at low volume use why wouldn’t you just look at the Chinese made cutters? For example I purchased a set of ER32 collets from CTC tools for about $120 Aussie dollars including shipping, they’re based in Europe but it’s all obvious Chinese made, but they’re manufactured to the same DIN standard and when I’ve chucked them up with an indicator they run true and have no obvious runout. Assuming the same can be said for the cutters is there some less obvious reasons to avoid the Chinese made stuff? This set of 8 cutters is only $80 bucks freedom.... Here’s the link to them http://www.ctctools.biz/hss-involute-module-gear-cutter-set-8pcs-h97/

Ray

Oh, great, I can't wait to see more on the antikythera again. Don't be afraid to use on-screen arrows (or something more classy, as is your usual way), to point stuff out; I had some trouble figuring out what "this" and "here" referred to on the final explanation of the byzantine sundial; but great videos, I enjoyed watching the builds.

Clickspring

G'day Ray, things on YT have been interrupted due to the research posted 2 below this one. Normal programming will resume as I spin up the AM project again. The TGT's that have been accumulating here will also make their way onto YT in due course - Cheers :)

Clickspring

Thanks Mike!

Clickspring

I have a couple of 'next projects' on the board, but not sure which one will happen first yet, both are geared mechanism, but of quite different character to each other. First things first tho, I have to get back to work on the AM project - Cheers :)

Clickspring

Thanks very much John :)

Clickspring

Lovely Graeme, very pleased you enjoyed it :)

Clickspring

Thank you mate :)

Ray

Why don't you post on normal youtube? I so rarely check patreon, so I miss most of your content. Your unlisted videos have fewer views than you have patrons; so I'm guessing many others are the same. Maybe create a youtube channel I can sub to which tells me to go check patreon? Or just have public videos like you used to. (none of my other patreons have unlisted videos or any "perks" I care about)

Mike Michelizzi

Excellent demonstration and beautifully filmed/edited as always. Thanks!

Iain Deas

So. Any hints as to what the next project will be?

John S Dilsaver

Excellent. You are an inspiration.

John S Dilsaver

Excellent. Ho

Clifton Ballad

For all of the beautiful work and amazing info you have in the vids, and I get distracted by a bit of glue LoL

Graeme Brumfitt

Chris, That was bloody magical. TFS, G :)

Duncan Luddite

A very nice Fathers Day present :) Thank you. I hope you had a good one too Chris.

Clickspring

Cheers Phil :)

Phil Sydor

Another excellent series which I really enjoy watching, thank you.

Zoltan Nemeth

Ah, I see! Thought it a bit off-putting beside all the seamless workings in your shop :) See you later on on Discord!

Clickspring

One thing I can say, its going to have gears cut with shop made cutters!! Cheers mate :)

Clickspring

Its the belts, they're made from cutting wider belts into 1" strips, so the edges end up a bit ragged. Cheers :)

Clickspring

Very pleased you're enjoying them Brian - That is a pin vise, a bit like this one: https://www.micromark.com/Double-End-Pin-Vise - Cheers :)

Clickspring

Cheers Maurice :)

Clickspring

Cheers mate :)

Justus Dehegovit

"These gear cutters will be a key element for the upcoming projects." Well, time to up my patreon tier! In all seriousness, I really enjoyed this mini series and I cant wait for the continuation on the AM project. I honestly have no idea what future project will be able to top the AM, I personally hope for an orrery, but only time will tell, I guess.

Zoltan Nemeth

Chris, why is your belt sander jerking the belt to and fro? Is the tensioner setting is too low or is the belt not up to par?

Brian Boccia

I watch an unreasonable amount of videos of people making things. Your videos are easily the most satisfying of all of them. What was that tool holder you were using for the drill rod at the beginning?