Michel, you have made a wonderfull system for cutting gears on the shaper and explaines how it works. It is ofcourse a pleasure to watch, thanks a lot, Brilliant!
Michel, I think gear shaping is a superb way to make your own gears. Yours was a great demonstration of gear making. I admire how you get the close up camera shots to show the details of what is going on. Cheers!
G'day rusti,, this was so good to watch and learn from. i have never seen this method before but it works a treat!! your commentary was excellent!👍👍👍👍👍👍
Thanks for this, covers the necessary information to do it yourself. It would be pretty easy to get a gear template plasma or water jet cut to then go and cut the actual gear you want and there is nothing preventing cutting several of the same gear in a stack on the arbor, only the available stroke of the shaper.
Very nice explanation of using the two methods to cut gears on a shaper. The advantage of the Wire Method is that ANY gear can be cut but a method of dividing must be built, i.e. sheet metal pattern or any gear with the proper number of teeth, etc., and a cable pulley of the pitch circle diameter (less 1/2 the wire diameter) must be turned. The Rack Method is essentially a gear copying method so a gear pattern of the same gear you want to cut along with a rack for that pitch must be obtained for each different module or DP cut. The Wire Method is more versatile the rack method is limited but faster to set up and with less effort. Great video, thanks!
Excellent example of using what you have to get something done. Willingness, imagination and using the available information to your advantage. Well done Michel.
Thank you Michel for an absolutely fascinating insight into making gears on a shaper. Very inventive. I really appreciate you taking the time to show the two processes. 👏👏👍😀
Brilliant method for cutting a true involute gear. Other methods are just aproximations to the shape, but this gives you a perfect involute shape tooth flank.
for your information, disc saws use by hand tools, such as dermel tool makes good teeth template. the only drawback is, they come in different size. you may have to modify the stopper to fit that. different brand have different teeth, you may even got some odd number of teeth if you are lucky. worth a look.
Great video Michel, that is a technique I have never heard of until you exposed it. Lots of fun, and very nice when you can make something you need. I never understood the pressure angle until you showed it on a rack. That rack is a nice replacement for the wire. Enjoyed very much, take care.
G'day Rusty. This would be one of the best Instructional Gear making videos on a Shaper. Looking at all the High Quality Jigs you have made, so that you can produce your own custom gear tooth selection is a massive feat of its own, let alone cut the gear that you require. Well done. Thanks
That is brilliant , thank you for answering the question I was afraid to ask. I’d never seen or heard about that method . I wonder does a gear hobbing machine work in a similar fashion ?. Thank you Michel , another very interesting video.
@@Rustinox No, thank you Michel - I've been on the lookout for a 7DP 20PA cutter to cut two 14T pinion shafts. Haven't been able to find one, now I am going to cut them on the shaper (after I drag it out from the deep corner of the shed!)
Michel, one thing I would like you to explain is how you determined what the module is of your required gears. I have a 12"x19" medium Chinese lathe with a mill attachment with a set of cast iron gears, ranging from 21 to 70 teeth. The largest gear is around 70 mm in diameter. I've no idea whatsoever in determining the module. How would you go about it? I certainly wouldn't trust the wire method unless you were able to get that really tight. I think you would need to use a long threaded rod and nuts to spread those bars and thus tighten the wire. Also I think I'd try to wrap the wire three times round the mandrel to ensure the wire grips it really well. But the rack idea is much more accurate to my mind. Thank you for taking the time to explain your set up. Cheers from England
What a great explanation. Thanks for this! Usually I cut gears on my old Atlas Milling machine, so this will be a nice learning experience. I'm curious if I grind the cutting tool to 20 degrees on each side for a PA of 20? Or for gears that require a PA of 14.5, cut those tools to 14.5 degrees on each side...etc. Thanks again for the great explanation.
That's correct. Note that the diameter of the 'base circle' (BCD) used to generate the gear profile depends on the pressure angle (as well as number of teeth and module, or DP - diametral pitch - of the tooth size. Formulae for both can be found online.
Done some gear cutting on mill .. what a right bollox up... now I understand my mistake.. was with not using the correct module lol.. client instructions was incorrect . Was cutting 17 tooth mod 1.5 when it should of been 2.0 ....😂😅 Make your own measurements, make your own choices.. and never listen to clients...!! Next week get the correct cutter and I will continue. Until then.. Happy machining... Very interesting video... buy a dividing head... got to be easier no ...?.
And of course, due to the way these gears are cut, they are exactly the correct involute shape, unlike a normal involute cutter milled gear, which is only exact for the lowest number of teeth in the specified range. You present this in a very approachable way, which I suspect hides a bit more understanding of what you're doing than you're saying, so you don't put viewers off. Overall, 👍
Excellent video, Michel. Understanding the use of the rack cutter to cut the gear really shows what the "involute" form really is. With the wire method, I am surprised that you get enough holding power to overcome the tendency of the blank to try and rotate away from the cutting forces. I assume it works well enough, though, and it's super ingenious. Is it "standard practice" for shapers? Yeah, I'm too lazy to go read the old literature.
