Quinn, You are getting so much better at this (just the talking in front of the camera and actually teaching a class).... Right now I want to scream from the mountain tops! This was awesome... I actually had 36 lectures on this (not portals but the materials and processes) You were so spot on! This was just so fun to listen to.... OH... and I received a second set of Tie Rods I need to return to you... I think you must have sent me the first set because RPG sent me a second..... I have really been enjoying watching your videos. They are really good. Well done sir! I am trying to get others to watch and listen.
it’s nice when people have the confidence, pride, and engineering prowess to not “gatekeep” information, but instead share the information that led to the insights for high quality product development. some of us have strong interests in all these engineering facets as hobbyists and informed consumers. thanks team!
We all sat down and had a “marketing” discussion and came to the conclusion that we don’t like typical marketing tactics of fluff. I am betting that if we push education and engineering first marketing will grow through grassroots of people saying “oh you should look at the 74Weld stuff…they build good shit” which to me is so much more valuable
I'm a trucker. Me & another guy delivered 1 of several "used" GE laser "printers" to a guy in upstate NY that got the contract to make engine & tranny mounts for Volvo trucks & busses. This "printer" took 2 semis to haul. It has a platform with stairs its huge. He had us pick up an engine mount from the counter top, we both tried to just pick it up with 1 hand becuz its just an engine mount right? Ya it took two hands to pick up it was so dense, it was an optical illusion. It was way too small to be that heavy. He explained that the printers print with "pulverized powdered stainless steel" it uses 3 laser beams and theres like zero air molecules inside the part being "printed". Thats why it was so heavy. I'm just wondering if you've ever heard of this process?! The original cost of the printer new was $3 million. He got them for $1 million at auction. I would imagine those parts are just about indestructible.
The problem with 3D printed material for something like this is you get no grain structure and relative to plate it is much weaker in all directions. Very cool for printing parts that can never be machined and commonly used in aerospace, but not a good solution for this application
Regarding the thermal conductivity units, BTU is an amount of heat, so it's saying that for every square foot of surface, and for every °F of difference across the material, it will move that many BTU of heat one inch. If the thickness goes down, the amount of heat moved goes up proportionally. Using the 7075-T6 (with 900 BTU in/(hr ft² °F) thermal conductivity) as an example, if you have a sphere with a 1 foot diameter, and the walls are 1/4 inch thick, and the inside is 125 °F warmer than the outside: The area is pi square feet (3.141), so you have 3.141×125/(1/4)*900 = 1,413,716 BTU/hr of heat flow outward. Of note: the temperature difference is not relative to ambient temperature; it's purely across the material itself. If the whole material gets hot, that can help with shedding heat to the surrounding air, as well as increasing the amount of radiative heat transfer, but heat flow through the metal doesn't care at all about anything outside the material.
Lots of great info. Thank you for breaking down the quality behind the manufacturing. I'm ok with it being expensive for quality. I wouldn't want it if it was cast.
Love the behind-the-scenes videos. Must be near impossible to to predict how to procede. Will new manufacturing processes lower the cost where where sales will increase significantly? Where is the cost tipping point? For me it would be where the cost is the same as a monster build with upgraded axles and suspension; isn't that ~$20K? . Of course there's the cool factor that only portals give
Good info. I always figured for something I am using I'd rather have a little ductility rather that a little higher tensile, so something will bend so I know it's failing, rather than just snap and break. Like you pointed out, it all depends on the part an application. Nothing is 100% perfect for everything, you give up one thing to gain in another aspect.
I tend to agree most of the time. I’ve been reading about tempers a lot more lately. The beauty of forging is you can get them in alloys and tempers that are not found in stocked plate. For example, T651 and T7651 are common in plate T7 is not. T7 will have a slightly lower tensile and yield but will be less prone to fatigue and more ductile. So much more to read and learn before we commit to an alloy and process. Sounds like we both geek out on this stuff
Regarding work hardening, it's not the case that it makes finer grains or aligns grains, at least in every case. In every case I'm aware of, it's more so that working it relocated certain types of faults in the crystal lattice to the edge of the grain. It's easier to move the faults through a grain than it is to move grains, and without functionally melting the metal you're not going to change much about the grain as a whole. If you want to know more, I would highly recommend Steve Mould's video "Self organising steel balls explain metal heat treatment" (ruclips.net/video/xuL2yT-B2TM/видео.html ). Additionally, AlphaPhoenix made a good video on crystal deformation for his 2¹³ subscriber special (ruclips.net/video/sn1Y6zIS91g/видео.html ). Both videos are quite understandable, so I'd recommend giving at least one of them a watch.
You will discover the weak points in your design and upgrade as needed. Then you will sneak up on the weak points on the connected parts (axle assemblies). At that point I think you can stop upgrading because technically your only failures will be due to uncontrollable forces associated with a heavy right foot. Nice to see some actual engineering design being followed. Hoping you have future thoughts for one ton rated axles in the future.
We would love to do 1 ton stuff, but as long as they put a traditional grease pack spindle on the rear end we will never be able to adapt to it. Now the new Chevy 1500 and 2500 run a massive unit bearing with a bearing cup on the rear…that we can bolt to
@@74weldI’d love it if y’all made a budget setup for Dana 44 and semi float 14 bolt. I’ve got a square body suburban I’m building into an overland setup. Low lift big tires is the route I’m going so the more axle to ground clearance I can get the better.
@@kylewest100 the problem is there are a dozen different 44’s. Designing a custom knuckle for an old vehicle with very few left on the market isn’t really a recipe for a “budget” product. We have never developed for an axle, only for a specific vehicle due to brake packages etc. there really isn’t a good way to do a “one size fits all”
@@seancollins9745 we do…it’s just when you try to tell a customer they have to cut off their factory end and weld on a new one you just eliminated 90% of your market. I have a full fab shop and I still wouldn’t do that because you would have to pull your carrier, setup a fixture bar and located the ends, weld them all up, then reset your carrier. That is a ton of work that most people could not handle
Great video. I would try to add customer service to your 4 instead of top 3. Very informative, great products. Running your older two style 1.55 gears and portals. Work on customer service, hope y’all keep moving forward.
Thermal conductivity is the amount of heat energy a material can move through itself in a certain amount of time away from its surface per unit of cross-sectional area.
Might want to add in Fatigue Limit and how aluminum does not have a fatigue limit in that every cycle of stress causes damage regardless of how much stress it is. Yes a higher stress loading decreases the cycle life but when you are talking suspension components every bump is a cycle.
True…and a good point. We are just so far beyond a typical safety factor we are comfortable with the risk. Another point we didn’t touch on in this is anodizing on 7 series alloys and its effects on fatigue life. Maybe a topic for another day
Very informative video, thank you for diving in details. Are you guys open to forge components overseas? We can provide you that. Let me know if you are open to discuss further details. Thanks again.
Most of this materials stuff was figured out a century or more ago. Any machinist worth his salt could tell you nearly all of the info here. There are other options, for example HIP (hot isostatic press), Cold isostatic press, hydroforming, etcetera.
Hi, I have a question about does the current portal for 5th gen 4runner fit in new 6th gen 4unner or not? Or new portal for 6th gen 4runner will be made? i hope answer. good luck guys
Ductile iron is hot garbage, the only ppl using it are ones that are too cheap to pay for aluminum. Theres several aluminum alloys that are as strong for 45% of the weight.
Ductile iron is great in applications where weight isn't very important, or cost is more important. In an application like this where it's unsprung weight, it's a big deal. Even so, ductile iron would be fine for a portal aimed at people who would rather save some money than have the highest performance.
Quinn, You are getting so much better at this (just the talking in front of the camera and actually teaching a class).... Right now I want to scream from the mountain tops! This was awesome... I actually had 36 lectures on this (not portals but the materials and processes) You were so spot on! This was just so fun to listen to.... OH... and I received a second set of Tie Rods I need to return to you... I think you must have sent me the first set because RPG sent me a second..... I have really been enjoying watching your videos. They are really good. Well done sir! I am trying to get others to watch and listen.
it’s nice when people have the confidence, pride, and engineering prowess to not “gatekeep” information, but instead share the information that led to the insights for high quality product development. some of us have strong interests in all these engineering facets as hobbyists and informed consumers. thanks team!
We all sat down and had a “marketing” discussion and came to the conclusion that we don’t like typical marketing tactics of fluff. I am betting that if we push education and engineering first marketing will grow through grassroots of people saying “oh you should look at the 74Weld stuff…they build good shit” which to me is so much more valuable
I'm a trucker. Me & another guy delivered 1 of several "used" GE laser "printers" to a guy in upstate NY that got the contract to make engine & tranny mounts for Volvo trucks & busses. This "printer" took 2 semis to haul. It has a platform with stairs its huge. He had us pick up an engine mount from the counter top, we both tried to just pick it up with 1 hand becuz its just an engine mount right? Ya it took two hands to pick up it was so dense, it was an optical illusion. It was way too small to be that heavy. He explained that the printers print with "pulverized powdered stainless steel" it uses 3 laser beams and theres like zero air molecules inside the part being "printed". Thats why it was so heavy. I'm just wondering if you've ever heard of this process?! The original cost of the printer new was $3 million. He got them for $1 million at auction. I would imagine those parts are just about indestructible.
The problem with 3D printed material for something like this is you get no grain structure and relative to plate it is much weaker in all directions. Very cool for printing parts that can never be machined and commonly used in aerospace, but not a good solution for this application
Regarding the thermal conductivity units, BTU is an amount of heat, so it's saying that for every square foot of surface, and for every °F of difference across the material, it will move that many BTU of heat one inch. If the thickness goes down, the amount of heat moved goes up proportionally.
Using the 7075-T6 (with 900 BTU in/(hr ft² °F) thermal conductivity) as an example, if you have a sphere with a 1 foot diameter, and the walls are 1/4 inch thick, and the inside is 125 °F warmer than the outside:
The area is pi square feet (3.141), so you have 3.141×125/(1/4)*900 = 1,413,716 BTU/hr of heat flow outward.
Of note: the temperature difference is not relative to ambient temperature; it's purely across the material itself. If the whole material gets hot, that can help with shedding heat to the surrounding air, as well as increasing the amount of radiative heat transfer, but heat flow through the metal doesn't care at all about anything outside the material.
Would love an FEA episode! Nice content :)
Excellent as usual!!! Love these tech deep dives!
Super interesting again 🤓 Thank you 🤙🏼
Great info!
Lots of great info. Thank you for breaking down the quality behind the manufacturing. I'm ok with it being expensive for quality. I wouldn't want it if it was cast.
Greatly explained.
Love the behind-the-scenes videos. Must be near impossible to to predict how to procede. Will new manufacturing processes lower the cost where where sales will increase significantly? Where is the cost tipping point? For me it would be where the cost is the same as a monster build with upgraded axles and suspension; isn't that ~$20K? . Of course there's the cool factor that only portals give
Good info. I always figured for something I am using I'd rather have a little ductility rather that a little higher tensile, so something will bend so I know it's failing, rather than just snap and break. Like you pointed out, it all depends on the part an application. Nothing is 100% perfect for everything, you give up one thing to gain in another aspect.
I tend to agree most of the time. I’ve been reading about tempers a lot more lately. The beauty of forging is you can get them in alloys and tempers that are not found in stocked plate. For example, T651 and T7651 are common in plate T7 is not. T7 will have a slightly lower tensile and yield but will be less prone to fatigue and more ductile. So much more to read and learn before we commit to an alloy and process. Sounds like we both geek out on this stuff
I am going to have portals on my 4runner. These guys are different!
Regarding work hardening, it's not the case that it makes finer grains or aligns grains, at least in every case. In every case I'm aware of, it's more so that working it relocated certain types of faults in the crystal lattice to the edge of the grain. It's easier to move the faults through a grain than it is to move grains, and without functionally melting the metal you're not going to change much about the grain as a whole.
If you want to know more, I would highly recommend Steve Mould's video "Self organising steel balls explain metal heat treatment" (ruclips.net/video/xuL2yT-B2TM/видео.html ).
Additionally, AlphaPhoenix made a good video on crystal deformation for his 2¹³ subscriber special (ruclips.net/video/sn1Y6zIS91g/видео.html ).
Both videos are quite understandable, so I'd recommend giving at least one of them a watch.
You will discover the weak points in your design and upgrade as needed. Then you will sneak up on the weak points on the connected parts (axle assemblies). At that point I think you can stop upgrading because technically your only failures will be due to uncontrollable forces associated with a heavy right foot. Nice to see some actual engineering design being followed. Hoping you have future thoughts for one ton rated axles in the future.
We would love to do 1 ton stuff, but as long as they put a traditional grease pack spindle on the rear end we will never be able to adapt to it. Now the new Chevy 1500 and 2500 run a massive unit bearing with a bearing cup on the rear…that we can bolt to
@@74weldI’d love it if y’all made a budget setup for Dana 44 and semi float 14 bolt. I’ve got a square body suburban I’m building into an overland setup. Low lift big tires is the route I’m going so the more axle to ground clearance I can get the better.
@@kylewest100 the problem is there are a dozen different 44’s. Designing a custom knuckle for an old vehicle with very few left on the market isn’t really a recipe for a “budget” product. We have never developed for an axle, only for a specific vehicle due to brake packages etc. there really isn’t a good way to do a “one size fits all”
@@74weld make a weld on housing end.
@@seancollins9745 we do…it’s just when you try to tell a customer they have to cut off their factory end and weld on a new one you just eliminated 90% of your market. I have a full fab shop and I still wouldn’t do that because you would have to pull your carrier, setup a fixture bar and located the ends, weld them all up, then reset your carrier. That is a ton of work that most people could not handle
Great video. I would try to add customer service to your 4 instead of top 3. Very informative, great products. Running your older two style 1.55 gears and portals. Work on customer service, hope y’all keep moving forward.
Thermal conductivity is the amount of heat energy a material can move through itself in a certain amount of time away from its surface per unit of cross-sectional area.
Might want to add in Fatigue Limit and how aluminum does not have a fatigue limit in that every cycle of stress causes damage regardless of how much stress it is. Yes a higher stress loading decreases the cycle life but when you are talking suspension components every bump is a cycle.
True…and a good point. We are just so far beyond a typical safety factor we are comfortable with the risk. Another point we didn’t touch on in this is anodizing on 7 series alloys and its effects on fatigue life. Maybe a topic for another day
The Formula Offroad guys chuckle "Yeah, we've been throwing vehicles off mountains for ages and just drive away".
Very informative video, thank you for diving in details. Are you guys open to forge components overseas? We can provide you that. Let me know if you are open to discuss further details. Thanks again.
I don't know what you mean. Everything IS indeed a hammer :D
Most of this materials stuff was figured out a century or more ago. Any machinist worth his salt could tell you nearly all of the info here. There are other options, for example HIP (hot isostatic press), Cold isostatic press, hydroforming, etcetera.
bravoo
Please learn SI units. Other than that, thanks for a great video.
GREAT VIDEO EVEN THO I UNDERSTOOD NEXT TO NOTHIN...........................................
most forgings start as a casting
$20k though?. . .
Have anything for 1 tons?
Casting plus HIP, hot isostatic pressing, is the best cheap option to upgrade casting.
I’ve got expert friends in this field.
I’ll send you an email 📧
It’s like cheese.
Hi, I have a question about does the current portal for 5th gen 4runner fit in new 6th gen 4unner or not? Or new portal for 6th gen 4runner will be made? i hope answer. good luck guys
We are installing the 6th Gen 4Runner portals today…same as the 4th Gen Tacoma. We will have them on display at overland expo west next week in AZ
@@74weld wow sounds good, waiting for video upload. pls when it is ready , add it to website. I will be purchasing when it is done.
Ductile iron is hot garbage, the only ppl using it are ones that are too cheap to pay for aluminum. Theres several aluminum alloys that are as strong for 45% of the weight.
Ductile iron is great in applications where weight isn't very important, or cost is more important. In an application like this where it's unsprung weight, it's a big deal. Even so, ductile iron would be fine for a portal aimed at people who would rather save some money than have the highest performance.
@@siggyincr7447 Yea cost in my experience is the only reason I see it being used.