Tools, Glorious Tools! #10 (Part 5) - Shop Made Gear Cutters - Tooth Fillets & Edge Cases
Added 2020-09-06 00:03:23 +0000 UTCHi Folks,
In this final episode of the 5 part mini-series on shop made gear cutters, I look at how to include fillet geometry into tooth profiles, and investigate a couple of the module and tooth count edge cases - do please enjoy!
Also, you have a standing invite to the weekly Clickspring Discord chat. Come along and say G'day, show some pics of what you've been up to for the week, ask a few questions and maybe give a few answers. Its on every Sunday evening/Monday morning at 2200 UTC (6pm Sunday EDT, 8am Monday AEST).
Cheers,
Chris.
Connect to the Clickspring Discord: support.patreon.com/hc/en-us/articles/212052266-How-do-I-receive-my-Discord-role-
Direct links to the video -
Vimeo: https://vimeo.com/455108809/da83909257
Youtube: https://youtu.be/nE2GacSN3Qg
-------------- Video Notes: ---------------
Some top resources on Gear Theory:
John Stevenson Blog Post - http://metalwebnews.com/howto/gear/gear1.html
WO Davis – “Gears For Small Mechanisms”: https://amzn.to/2Yj2Ben
JM Wild - "Wheel & Pinion Cutting in Horology": http://amzn.to/2HI6ca9
"Gears and Gear Cutting", Ivan Law: http://amzn.to/2FKmaUI
Tony's gear videos: - https://www.youtube.com/watch?v=Q-XOM4E4RZQ
https://www.youtube.com/watch?v=ds6qZ7Ss2fA
Stefan on sharpening with pro gear, and a discussion on profile error: https://www.youtube.com/watch?v=7sxq5khqeWI
Mr Pete's Gear Videos -
https://www.youtube.com/watch?v=JMhYuXx35Ik
https://www.youtube.com/watch?v=12sdMFr5CNU
https://www.youtube.com/watch?v=2lPNqn8LU4Q
https://www.youtube.com/watch?v=dQVUI1YhN0E
https://www.youtube.com/watch?v=mXU-URNdUFU
https://www.youtube.com/watch?v=Dipd0ohrYzg
Andy Pugh's Gear hobbing video's:
"The Watchmakers' Lathe " Ward Goodrich - https://amzn.to/2Wijchr
Hugh Sparks - https://www.csparks.com/watchmaking/CycloidalGears/index.jxl
"The Clock & Watch Makers Guide to Gear Making" Porter - https://amzn.to/2xuFP7I
Online Gear Generator: https://geargenerator.com/
Alan Pinkus’s Gear Generator - http://www.micro-machine-shop.com/gears.htm#Gearotic_Motion
Matthias Wandels gear generator: https://woodgears.ca/gear_cutting/template.html
(Amazon Affiliate links)
Cameras:
Panasonic GH5 - https://amzn.to/2rEzhh2
Panasonic X920 - https://amzn.to/2wzxxdT
Books:
"Wheel & Pinion Cutting in Horology": http://amzn.to/2HI6ca9
"Solidworks 2013 Bible": http://amzn.to/2FObS1D
WO Davis – “Gears For Small Mechanisms”: https://amzn.to/2Yj2Ben
"Workshop practice Series": https://amzn.to/2WgeGh0
Tools & Shop Products:
Sherline Lathe: http://amzn.to/2pnXM19
Sherline WW collets: http://amzn.to/2FYZ7F8
Starrett S828 Wiggler Center Finder With 3 Attachments - https://amzn.to/3hoAsK1
Optivisor Headband Magnifier: http://amzn.to/2HFg1FU
Norton 1-by-2-by-8-Inch Fine/Coarse India Combination Oilstone, Red: http://amzn.to/2tTEPb0
Hegner Scroll Saw: https://amzn.to/2IhteVW
Digital Caliper 6 inch/150 mm Electronic Vernier Calipers: https://amzn.to/2EArNRU
Generic Dial Indicator 0.001": http://amzn.to/2FOFTyF
Interapid Dial Test Indicator: http://amzn.to/2FPInwH
Saint Gobain (Norton) - 4 Arkansas Stones + case: http://amzn.to/2HCOAMX
Dormer A190202 Jobber Drill Set, 1.0 mm - 6.0 mm x 0.1 mm Size: https://amzn.to/2DR5fdb
Dormer A190203 Jobber Drill Set, 6.0 mm - 10.0 mm x 0.1 mm Size: https://amzn.to/2ITfeTa
YG1 NC Spotting Drill 8% Cobalt HSS 1/8 to 1/2" 120 Degree 5 Pc Set CNC Machine: https://amzn.to/2G7ylv6
Blazer GB2001 Self-Igniting Butane Micro-Torch: https://amzn.to/3f5Gzlh
Magnetic Base Adjustable Metal Test Indicator Holder Digital Level 14" - Tool Stand: https://amzn.to/2PkyoTV
Anytime Tools Angle Block Set 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, 30° Precision +/- 20 Seconds, Machinist Tool, 10 Piece Set: https://amzn.to/2QFqM2Y
Jewellers Bench Block - https://amzn.to/3clHQD2
Consumables:
Super Pike Saw Blades Size 3/0 pkg of 144: https://amzn.to/2uI0QdT
Blue Matador Abrasive Paper: https://amzn.to/2IAFiBT
Bergeon Professional Cleaning Rodico: https://amzn.to/2NwcM6y
Dykem 80300 Steel Blue Layout Fluid, Brush-in-Cap (4oz): http://amzn.to/2HGPaJJ
Comments
Excellent mate, so pleased :)
Clickspring
2021-03-30 08:28:37 +0000 UTCAmazing! Learned so much from this series. Stayed up way past my bedtime, was so helpful.
Joshua Greer
2021-03-30 07:56:12 +0000 UTCHi 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 :)
Clickspring
2020-11-25 22:28:30 +0000 UTCBy 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.
Karl Mansson
2020-11-25 22:12:38 +0000 UTCThe 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.
Kirk Jensen
2020-10-21 21:16:04 +0000 UTCMakes 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!
Hogtown Pens
2020-09-18 17:39:23 +0000 UTCThanks, I am glad the machines do not win this one. Stay safe Ralph
Ralph McCoy
2020-09-15 01:28:43 +0000 UTCAs 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
2020-09-14 23:38:34 +0000 UTCCheers PJ!
Clickspring
2020-09-14 23:32:18 +0000 UTCChris, when you were engraving the card press can that be done with a cnc mill? Ralph
Ralph McCoy
2020-09-14 20:35:38 +0000 UTCWonderful 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!
PJ
2020-09-11 22:21:06 +0000 UTCThanks Chris, See you there 3 PM PDT for me. (Greetings from the Bay Area)
Timothy Girard
2020-09-11 17:26:42 +0000 UTCHi 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
2020-09-11 04:38:42 +0000 UTCSounds good, catch you both in the DM's
Clickspring
2020-09-11 04:28:21 +0000 UTCActually 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.
Glenn Trewitt
2020-09-11 03:09:49 +0000 UTCHey 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.
Timothy Girard
2020-09-11 00:48:48 +0000 UTCHi 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.
Clickspring
2020-09-10 19:47:58 +0000 UTCChris - As Brandon asked, what are the key parameters that define the gears that a cutter makes?
Glenn Trewitt
2020-09-10 15:51:48 +0000 UTCAnd some "if" to customize based on which system is being used.
Glenn Trewitt
2020-09-10 15:50:25 +0000 UTCHello 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.
Brandon C. (Keronin)
2020-09-10 09:06:38 +0000 UTCThank you mate!
Clickspring
2020-09-09 21:02:48 +0000 UTCWhat 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!
PeetieGonzalez
2020-09-08 08:58:29 +0000 UTCHi 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 :)
Clickspring
2020-09-08 04:12:33 +0000 UTCI'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. :-)
Glenn Trewitt
2020-09-08 03:25:58 +0000 UTCGlad 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
2020-09-08 03:09:25 +0000 UTCTerrific to hear that Lee :)
Clickspring
2020-09-08 03:05:23 +0000 UTCenjoying these videos. Much of it is very useful for my model making
Lee Marsh
2020-09-07 23:02:20 +0000 UTCHey 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/
Iain Deas
2020-09-07 20:52:38 +0000 UTCOh, 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.
Ray
2020-09-07 08:22:13 +0000 UTCG'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
2020-09-07 07:55:29 +0000 UTCThanks Mike!
Clickspring
2020-09-07 07:48:25 +0000 UTCI 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
2020-09-07 07:48:17 +0000 UTCThanks very much John :)
Clickspring
2020-09-07 07:43:44 +0000 UTCLovely Graeme, very pleased you enjoyed it :)
Clickspring
2020-09-07 07:43:27 +0000 UTCThank you mate :)
Clickspring
2020-09-07 07:43:09 +0000 UTCWhy 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)
Ray
2020-09-07 07:01:11 +0000 UTCExcellent demonstration and beautifully filmed/edited as always. Thanks!
Mike Michelizzi
2020-09-07 01:19:01 +0000 UTCSo. Any hints as to what the next project will be?
Iain Deas
2020-09-07 00:14:01 +0000 UTCExcellent. You are an inspiration.
John S Dilsaver
2020-09-06 16:29:24 +0000 UTCExcellent. Ho
John S Dilsaver
2020-09-06 16:29:06 +0000 UTCFor all of the beautiful work and amazing info you have in the vids, and I get distracted by a bit of glue LoL
Clifton Ballad
2020-09-06 14:47:08 +0000 UTCChris, That was bloody magical. TFS, G :)
Graeme Brumfitt
2020-09-06 14:24:17 +0000 UTCA very nice Fathers Day present :) Thank you. I hope you had a good one too Chris.
Duncan Luddite
2020-09-06 11:05:53 +0000 UTCCheers Phil :)
Clickspring
2020-09-06 10:30:59 +0000 UTCAnother excellent series which I really enjoy watching, thank you.
Phil Sydor
2020-09-06 09:42:41 +0000 UTCAh, I see! Thought it a bit off-putting beside all the seamless workings in your shop :) See you later on on Discord!
Zoltan Nemeth
2020-09-06 08:57:15 +0000 UTCOne thing I can say, its going to have gears cut with shop made cutters!! Cheers mate :)
Clickspring
2020-09-06 08:56:26 +0000 UTCIts the belts, they're made from cutting wider belts into 1" strips, so the edges end up a bit ragged. Cheers :)
Clickspring
2020-09-06 08:53:25 +0000 UTCVery 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
2020-09-06 08:51:27 +0000 UTCCheers Maurice :)
Clickspring
2020-09-06 08:46:06 +0000 UTCCheers mate :)
Clickspring
2020-09-06 08:45:52 +0000 UTC"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.
Justus Dehegovit
2020-09-06 08:04:36 +0000 UTCChris, 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?
Zoltan Nemeth
2020-09-06 07:24:09 +0000 UTCI 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?
Brian Boccia
2020-09-06 06:41:40 +0000 UTCSir, you are a true master. Thanks for this deep dive, I learned so much. Now let try it myself.
Maurice Lucas
2020-09-06 06:23:32 +0000 UTCThe way the loctite magnified the surface it was on ( 3:19 ) was visually amazing
Clifton Ballad
2020-09-06 00:32:07 +0000 UTC
