I had to look up what 4140 Q&T meant: 4150 HR Quenched and Tempered (Q&T) This is a resulphurized, hot-rolled, quenched, tempered, stress-relieved steel. 4150R HR Q&T SR is a free-machining alloy steel that provides an outstanding combination of heat-treated properties and superior machinability. It would be interesting to see the tempering step.
Flame hardening or surface hardening is generally not run through a tempering cycle. On 4140 the hardness is generally not over 50 Rc and not very deep.
I actually use this 4140QT alot in my little small shop at home just because it is readily available where I am and it's very nice to work with actually and leave a beautiful finish. And it's tough.
@@4GSR Chris didn’t show us the specified material on the drawing so maybe it’s not even supposed to be 4140. That being said 4140 can definitely reach 54-60hrc. Maybe flame hardening isn’t the ideal process, perhaps induction hardening like the drawing calls for can reach those values
Hi Chris. Thanks for this great machining video, I love the size of your impressive micrometer . Tell me it must take a long time to machine these big parts, plus the program that has to be entered, what a job. A suggestion Chris, film the settings of your four jaws it would be super interesting to see how you get such perfect settings on the comparator.Have a nice weekend.
I used to rough out forgings (manually) similar to that at a forge in Australia. Pretty dangerous work! Hey Chris, have you ever flipped a job & found its already clocked, as a fluke? I've had that happen once on a vertical borer & once on a mill. Makes you wonder if your dial is actually working!😄
So I gather that @5:30 you are indicating the enormous radiused contour ? Impressive are the made to order forgings. And you can see the slight depression in the surface where they pushed the pin through the center. It is hard to read the drawings for some of us aficionados, but that R is surely followed by 15000, as in 15 meters???
"Some time ago" I watched a video in which "volcanic ash cloud reached 55,000 ft, or 16,764 m". Not "nearly 17,000 m", not even "approx. 16,800 m", but *EXACTLY* (and precisely!) 16,764 m - not bad for a rather insubstantial thing like a CLOUD, innit? ;-) And of course it has nothing to do with a rough forged piece of steel which OD is EXACTLY 774.7 mm - not 775, but "to the tenth". (Un)like that wooden pole mentioned in some manual I've read some time back, on which (the pole) a mole-deterring device (or a bird feeder) was to be mounted - and the author suggested that this piece of wood would be "approximately 25.4 mm in diameter"... Well, fair enough - "approximately" only... : ) Yes, I know - "czepiasz się, koleś..." ;-) PS: 1:00 - To się fachowo nazywa "naddatek na obróbkę" : ) No promomocja widać była, to i dołożyli extra - i nima co wybrzydzać bo następną razą dadzą póltory minimetra abo i mniej ;-)
How you can do such precision work on such big parts is simply amazing. That was one hell of a forging. Thanks.
I had to look up what 4140 Q&T meant: 4150 HR Quenched and Tempered (Q&T)
This is a resulphurized, hot-rolled, quenched, tempered, stress-relieved steel. 4150R HR Q&T SR is a free-machining alloy steel that provides an outstanding combination of heat-treated properties and superior machinability.
It would be interesting to see the tempering step.
Flame hardening or surface hardening is generally not run through a tempering cycle. On 4140 the hardness is generally not over 50 Rc and not very deep.
I actually use this 4140QT alot in my little small shop at home just because it is readily available where I am and it's very nice to work with actually and leave a beautiful finish. And it's tough.
@@4GSRdrawing specified 54-60 HRC
@@ED_T Good luck on hitting it! You might get 55 HRC on a good day. Just saying.
@@4GSR Chris didn’t show us the specified material on the drawing so maybe it’s not even supposed to be 4140. That being said 4140 can definitely reach 54-60hrc. Maybe flame hardening isn’t the ideal process, perhaps induction hardening like the drawing calls for can reach those values
Hi Chris,
congralutations for this new wok !
And thank you for this new week-end video.
Xris
Hi Chris. Thanks for this great machining video, I love the size of your impressive micrometer . Tell me it must take a long time to machine these big parts, plus the program that has to be entered, what a job. A suggestion Chris, film the settings of your four jaws it would be super interesting to see how you get such perfect settings on the comparator.Have a nice weekend.
Beautiful work as always mate, Cheers
Thanks for the video. I enjoy and am amazed at the size of work being done with precision. Do you ever use pi tape instead of a micrometer?
Ahhh, enough news, enough chores, enough whirling thoughts... time for some meditation. :) I don't even need the sound really. 👍
That’s a serious heat treat right there 👌
Massive fan of that big lathe 👍👍👍great video thanks for sharing 👍
I used to rough out forgings (manually) similar to that at a forge in Australia. Pretty dangerous work!
Hey Chris, have you ever flipped a job & found its already clocked, as a fluke? I've had that happen once on a vertical borer & once on a mill. Makes you wonder if your dial is actually working!😄
Dobra robota
So I gather that @5:30 you are indicating the enormous radiused contour ? Impressive are the made to order forgings. And you can see the slight depression in the surface where they pushed the pin through the center.
It is hard to read the drawings for some of us aficionados, but that R is surely followed by 15000, as in 15 meters???
What's your total working time to make something like this, bud?
Hi chris
Why didn’t you machine the contour on the first side?
"Some time ago" I watched a video in which "volcanic ash cloud reached 55,000 ft, or 16,764 m". Not "nearly 17,000 m", not even "approx. 16,800 m", but *EXACTLY* (and precisely!) 16,764 m - not bad for a rather insubstantial thing like a CLOUD, innit? ;-)
And of course it has nothing to do with a rough forged piece of steel which OD is EXACTLY 774.7 mm - not 775, but "to the tenth".
(Un)like that wooden pole mentioned in some manual I've read some time back, on which (the pole) a mole-deterring device (or a bird feeder) was to be mounted - and the author suggested that this piece of wood would be "approximately 25.4 mm in diameter"... Well, fair enough - "approximately" only... : )
Yes, I know - "czepiasz się, koleś..." ;-)
PS: 1:00 - To się fachowo nazywa "naddatek na obróbkę" : ) No promomocja widać była, to i dołożyli extra - i nima co wybrzydzać bo następną razą dadzą póltory minimetra abo i mniej ;-)
Where is such thing used in? I know its a wheel but can't figure out the life of me where one would use such big and strong wheel
@@asf130thecompany7 steel mill industry
@@ChrisMaj Ok 😅 Yea makes sense... That would require such thing true...
👍
👍👍