It's good to see I'm not the only gear cutter who was wondering about the involute profile, helix angle, pressure angle, and pitch circle. If it was me, I'd either use some form of rust remover chemical, or just a trip to the wire wheel if it wasn't super-critical.
@christophervillalpando1815 and the shaft that gear goes on will have a shoulder to locate against that newly ground face and your teeth will be out of parallel. If you reground the face without regrinding the teeth then just chuck it in the scrap bin because it's now useless as a gear. Teaching is great but let's teach the right way.
The gear form and and tooth hardness are usually the critical characteristics for a gear accross multiple industries. I watched the whole video hoping to see geartooth grinding. The restoration looks nice, but hasn't addressed those criteria.
this must be what their media team came up with to market the grinding wheels they sell in their webshop. felt like a waste of time watching this honestly.
@@PonaHD I have been a grinder for 30 years. Aerospace industry. These videos are an embarrassment. Who grinds a magnetic holder so coarsely? It's a new machine, there's definitely no beating after reassembly.
God Bless You Titan. Your content helped me a lot when we temporarily lost my Dad. Your partnerships kept me family off the streets, indirectly. Thank you
i work in heavy steel and our shop has many old machines and we often send gears out for checking to see how good they still are and its surprising they are good a high percentage of the time, and i have sometimes cleaned up the gears in a solvent tank or parts washer that works well and then some wire wheel action afterwards, it sure is good that these services are out there able to fix or repair gears of all sorts
Assuming that this gear was made to spec in the first place, wouldn't further grinding actually take it out of spec? OR, are these gears deliberately made to the higher end of their required specs so that you can go in and dress them up after they've gotten some kind of wear on them?
I can not speak on this part in particular, though it seems odd to me that this part wouldn't just be replaced when worn out. Though there are plenty of examples, mostly big parts, parts that are not mass produced, or otherwise expensive to replace, that are made with re-machining in mind. Pipe flanges on oil and gas rigs for instance, they will be manufactured to spec. A, but you are allowed to machine it down to spec B before you have to replace it. Some times they will even do a weld buildup then re-machine to keep it in spec. Shafts and their bores on heavy machinery sometimes also has this planned into the design. When the bore gets worn, you can go one size up on the shaft, and re bore the bore, sleeve the bore, or weld it. More or less the same holds true for the shaft.
Cost of the Gear +/- 150$, cost of the work +/- 300$ it was just for show, but i suggest no one to alter the ID, it should be a precision fit with tight tolerances.
1. That came out of Barry's Studebaker Avanti, correct? 2. You probably should have added a little metal by welding to the bore before you ground it to get the bore diameter back to spec. 3. Too bad you don't have a laser cleaning system in the building; that would have removed the rust from inside the gear teeth.
After you flipped the gear you indicated in on to get it concentric, why? You're just making one face parallel to the other, what difference does it make if it's a little off center?
It appears that you ground the least important surfaces but left the teeth root full of rust.. In other words, you didn't clean up the actual mating work surface. The rust will lead to stress cracks and fractured teeth. but hey, it looks good from the outside
The runout of the the faces and ID/OD are pretty important, regrinding the gear teeth takes a different machine or at least one with an A axis. But thanks, glad you liked it.
@@christophervillalpando5865 Assuming it was a good part to begin with and just had some rust the run-out should have not been an issue (as was shown when he indicated it and found 0.001 run-out at the rim). Unless this thing is turning 10000 RPM or is in use in a very, very, very critical application I cannot believe it would be an issue (unlike corrosion on the teeth face and root.). He essentially put lip gloss on a old fashion British smile (if you dont know what I am talking about watch Austin Powers)
@@christophervillalpando5865 Chris, I really like the site and content (have been watching for years). I think the drive to create and educate a new horde of machinist is one of the best things that could done for the country. It was in that light that I pointed out the real issue with the part, the one that could cause catastrophic failure, was not addressed. I just wish you pointed out that the machine you were using was not equipped to deal with the teeth and that it would need to be addressed in a another operation.
I am a trained, 3.5 year apprentice in DK as a stainless steel blacksmith and know something about alloys, but I know almost nothing about machining. What is the hardest machining tool steel there is and what can it be used for? Hard alloys are porous under the wrong conditions. I don't know and my colleagues don't know, even though they are old machinists. What is the technically hardest and by far the hardest tool steel used in modern times*? Greetings from Denmark.
Weihrauch HW97 compression tube and piston from scrach? Titanium would be the best. Turning, milling, minor EDM, grinding... Paul Watts haven an amazing video about the fine tuning. Quite popular springer in the world. I bet that product could be a best seller!
я конечно ничего не понял что он говорит, но по-моему шестерня хоть со шлифовкой хоть без неё также работать будет. можно использовать как пособие по удалению ржавчины😂😂😂
I'm an experienced machinist and I mean yes, you ground and polished a gear and made it look pretty... but your methods definitely threw it out of parallel and certainly removed material so speaking from the book, less material means less structural strength... So technically you took an old gear with barely any surface rust and you made it operationally weaker and less parallel (imperfect tooth mesh)... So I would argue that it's possible you made that gear worse and less functional.... Feels like you guys must be getting desperate for video content these days
It's good to see I'm not the only gear cutter who was wondering about the involute profile, helix angle, pressure angle, and pitch circle.
If it was me, I'd either use some form of rust remover chemical, or just a trip to the wire wheel if it wasn't super-critical.
Gears are ground by their pitch line, not using the OD as reference. We have exact same machine and use pitch line chucks.
I didnt grind the gear profile, I reground the main OD and the Faces
@christophervillalpando1815 and the shaft that gear goes on will have a shoulder to locate against that newly ground face and your teeth will be out of parallel. If you reground the face without regrinding the teeth then just chuck it in the scrap bin because it's now useless as a gear. Teaching is great but let's teach the right way.
The gear form and and tooth hardness are usually the critical characteristics for a gear accross multiple industries. I watched the whole video hoping to see geartooth grinding.
The restoration looks nice, but hasn't addressed those criteria.
I don't understand why it needed to be ground in first place.?
this must be what their media team came up with to market the grinding wheels they sell in their webshop. felt like a waste of time watching this honestly.
@@PonaHD I have been a grinder for 30 years. Aerospace industry. These videos are an embarrassment. Who grinds a magnetic holder so coarsely? It's a new machine, there's definitely no beating after reassembly.
God Bless You Titan. Your content helped me a lot when we temporarily lost my Dad. Your partnerships kept me family off the streets, indirectly. Thank you
If real, that's legit ❤
@ it is. Having fusion 360 was a game changer
i work in heavy steel and our shop has many old machines and we often send gears out for checking to see how good they still are and its surprising they are good a high percentage of the time, and i have sometimes cleaned up
the gears in a solvent tank or parts washer that works well and then some wire wheel action afterwards, it sure is good that these services are out there able to fix or repair gears of all sorts
Assuming that this gear was made to spec in the first place, wouldn't further grinding actually take it out of spec? OR, are these gears deliberately made to the higher end of their required specs so that you can go in and dress them up after they've gotten some kind of wear on them?
No you're absolutely correct and I can't believe they actually put this on their channel; like does Titan not know how gears are made?
I can not speak on this part in particular, though it seems odd to me that this part wouldn't just be replaced when worn out. Though there are plenty of examples, mostly big parts, parts that are not mass produced, or otherwise expensive to replace, that are made with re-machining in mind. Pipe flanges on oil and gas rigs for instance, they will be manufactured to spec. A, but you are allowed to machine it down to spec B before you have to replace it. Some times they will even do a weld buildup then re-machine to keep it in spec. Shafts and their bores on heavy machinery sometimes also has this planned into the design. When the bore gets worn, you can go one size up on the shaft, and re bore the bore, sleeve the bore, or weld it. More or less the same holds true for the shaft.
How do you 'restore' a gear by removing metal and increasing the bore size? (presuming it came off some machine..)
Cost of the Gear +/- 150$, cost of the work +/- 300$
it was just for show, but i suggest no one to alter the ID, it should be a precision fit with tight tolerances.
Nice,I have done some grinding on my lathe with a tool post grinder.
1. That came out of Barry's Studebaker Avanti, correct?
2. You probably should have added a little metal by welding to the bore before you ground it to get the bore diameter back to spec.
3. Too bad you don't have a laser cleaning system in the building; that would have removed the rust from inside the gear teeth.
After you flipped the gear you indicated in on to get it concentric, why? You're just making one face parallel to the other, what difference does it make if it's a little off center?
Grinding lines
@@Killou blanchard looks better anyways
@@Enrios blanchard machines?
Always love a good restoration video👍
Can you please also Grind the teeth???
It appears that you ground the least important surfaces but left the teeth root full of rust.. In other words, you didn't clean up the actual mating work surface. The rust will lead to stress cracks and fractured teeth. but hey, it looks good from the outside
The runout of the the faces and ID/OD are pretty important, regrinding the gear teeth takes a different machine or at least one with an A axis. But thanks, glad you liked it.
@@christophervillalpando5865 Assuming it was a good part to begin with and just had some rust the run-out should have not been an issue (as was shown when he indicated it and found 0.001 run-out at the rim). Unless this thing is turning 10000 RPM or is in use in a very, very, very critical application I cannot believe it would be an issue (unlike corrosion on the teeth face and root.).
He essentially put lip gloss on a old fashion British smile (if you dont know what I am talking about watch Austin Powers)
@@darikmatters8866 Thanks, glad you liked it!
@@christophervillalpando5865 Chris, I really like the site and content (have been watching for years). I think the drive to create and educate a new horde of machinist is one of the best things that could done for the country. It was in that light that I pointed out the real issue with the part, the one that could cause catastrophic failure, was not addressed. I just wish you pointed out that the machine you were using was not equipped to deal with the teeth and that it would need to be addressed in a another operation.
Awesome video Chris!
How did you center it on the mag chuck?
I am a trained, 3.5 year apprentice in DK as a stainless steel blacksmith and know something about alloys, but I know almost nothing about machining.
What is the hardest machining tool steel there is and what can it be used for? Hard alloys are porous under the wrong conditions.
I don't know and my colleagues don't know, even though they are old machinists.
What is the technically hardest and by far the hardest tool steel used in modern times*?
Greetings from Denmark.
Weihrauch HW97 compression tube and piston from scrach? Titanium would be the best. Turning, milling, minor EDM, grinding...
Paul Watts haven an amazing video about the fine tuning. Quite popular springer in the world. I bet that product could be a best seller!
yeah but are the faces true to the gear pitch?
Is there any online course for learning coding of CNC from germany I am from India.....
Why use a griding wheel instead of a standard cutter?
Hard stuff and surface finish
Hone it, grind it in an arbor ...the amount of time to indicate in each piece. "Ill cut the production time in half!" 😂
Cool video, Chris!
No rectifican la parte de contacto entre los dientes del engranaje.
Now you have an oversize bore so that "functional" gear will wobble around.
why weren't the teeth cleaned by a similar process? surely they need to be in a similar set of tolerances too
я конечно ничего не понял что он говорит, но по-моему шестерня хоть со шлифовкой хоть без неё также работать будет. можно использовать как пособие по удалению ржавчины😂😂😂
im milling the machine bed of this grinding machine in my big ass milling machine. hehe
What a waste of machine time.
Never seen a wheel corner face grind b4
theres a flat dressed on it, you can see it on one of the close up shots
Couldn't you grind the gear teeth also 😂
It is not back to the original. I.D. is bigger, and thickness is smaller from grinding. Close, but no cigar.😮
For a video you guys should design and make a pocket knife with crazy tolerances and milling
I'm an experienced machinist and I mean yes, you ground and polished a gear and made it look pretty... but your methods definitely threw it out of parallel and certainly removed material so speaking from the book, less material means less structural strength... So technically you took an old gear with barely any surface rust and you made it operationally weaker and less parallel (imperfect tooth mesh)... So I would argue that it's possible you made that gear worse and less functional.... Feels like you guys must be getting desperate for video content these days
Could you grind the teeth?