Rockwell Bandsaw Repair Part 1
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- Опубліковано 21 лип 2023
- We have a cast iron bearing housing out of a 1959 Rockwell-Delta 20" bandsaw that needs some repair work. The threads are so worn that the retainer will no longer hold in the threads properly. We'll setup the cast housing in the 4 jaw chuck and machine some new threads, then machine a new retainer nut to match. Part 1 will show the repair work on the housing. Part 2 will conclude showing the machining of the new bearing retainer.
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Don't apologize for not having the expertise to do this on a CNC machine. Even an experienced CNC guy would take longer than you on a manual machine to do this job. This is exactly the type of job that lends itself perfectly to a manual machine and a skilled manual machinist. Repair work like this will always be the domain of a manual machine and machinist.
This is an easy job. Could probably even do it in MDA (haven't used cycle 97 in MDA personally but it's easy enough to make a new program if it doesn't.)
It would take 10-15 min to make the program and run it on the Mazak
Set up time is about the same, so…….
Setup on a Mazak costs a lot more, runtime always figures into equation of cost, Mazak vs Precision Mathews. This is like buying a Rolls Royce or a Ford Tempo
Well said.
Don’t worry, and I’m pretty sure when I say this that we all prefer the manual content…
UA-cam has a lot of cnc channels, I'm here for the abom experience in manual machines
This is my kind of machining, don't even watch the cnc or programmers, great video Adam, keep'um coming.
Ah, the sweet sound of Adam doing manual machining!!🎉 I think that the majority of your viewers enjoy watching you, exercise your exceptional,manual machining skills.
I like both manual and his CNC work equally. I don't moan whinge and wince when he stops doing the manual machining for a minnit to either use his CNC tools OR on very rare occasions flogs brand names. That's a nice combo.
I am not a machinist in any way, shape, or form. I just enjoy watching machinist videos on UA-cam. For me, it's cathartic, satisfying, and relaxing to watch items be revealed from raw materials. I think I saw others ask this: Once you had the housing indicated and locked-down and the threads cut... why would you not just face the housing while it's already dialed-in...? and maybe hit the OD for a bit as well just to give a place for indicating if ever needed again...? This is not a critique, it's a truly novice question.
I have been watching Adam's videos for at least ten years. After all that time, it's still amazing to me to see this big dude that you know has a load of strength and power in him tap and adjust with such finesse to move things just a few thousandths of an inch. Then, after those adjustments, take something that is either a rough lump of metal or a damaged part that most would trash and replace, and he gives it a new life... Awesome. I love these videos.
Liking the old format again, simple machine work, special circumastances and how to handle them
@@SteveColluns-hm2xx keep in mind that if he went full CNC, he would lose alot of old timers, i like his mix, he knows what he is doing
@@SteveColluns-hm2xx think of the trust those companies have in Abom to give half million dollar pieces of equipment, not for production work, but for entertainment. He has to start somewhere and i commend those companies. If Abom became a true production job shop and stopped making youtube vids, i dont think we would like that
Any reason why you did not face the end of the part? That way you had a machined surface to indicate if it returns for other repairs
I always love the care you put into dialing these things in. Beyond the skill, it's like... 'Good enough' isn't good enough, you _insist_ on doing it _right._
For those complaining about not facing the end of the housing: the original bearing bore and shoulder are the source, the original machined surfaces. It would have been nice if the factory had faced the housing in the original setup, because it would have provided an accessible external surface perfectly square to the internal surfaces. But they didn’t, so that ship has sailed. What Adam did, indicating to the original surfaces, was best practice, but the result, as good as it may be, is not necessarily absolutely square and concentric to the original surfaces. Nor does it need to be. It’s a bearing retainer, a thou or two is fine. But it would be a lazy future machinist repeating Adam’s repair who would trust the new machined face everyone seems to want and not indicate to the original hole.
Thanks for pointing that out. I was wondering why he did not face that part at the end of the threading operation. Makes sense to not alter or substitute the master source of reference on the part.
I _knew_ there was a _good_ reason Adam did not do that, but I did not know what it was. Thank you for explaining. Adam _knows_ what he is doing, but I do not.
100% He would be making a false reference.
You should start classes in manual machineing. Because your awsome, i'm 70 and teaching myself by watching your craftsmanship and teaching skills. Keep up the good work!
man I love the odd job type videos. I think it’s cool that people keep this and that going by just fixing what’s broken
As always with Adam, brilliant setup precision!
Смотрю все ваши ролики.Культура производства на высшем уровне!!Ваша мастерская ,просто мечта !!
Love these little rescue jobs, Glad to have found @CuttingEdgeEngineering for a new take on OG Abom giant scale jobs. Thank you Adam for the content.
I was thinking the same thing.
Fully expected you to face the casting and make an indicator band on the OD while it was in the lathe. Just in case there is an issue latter.
Rather see the manual LATHE Procedure!!😁
Great job as always 👍
Liking the old format again, much better than that CNC stuff.
You're such a poet sometimes. Like feeling wistful when you take the piece out of the chuck after all the work it took you to put it in there. Seriously though, I really don't know anything about machining but I really do enjoy watching your stuff. You're really focused and I get it, you have to do the same thing the same way every time to keep getting the same result. You also have a way of making me think that all I need is a bunch of machines and I could actually be a machinist. I mean that as a compliment to you, as a machinist and a video creator
For some reason this reminded me of a time back when I was in the Mill supply business (early '80s). One day the blower for the cooling air (not real Freon A/C just the roof evaporative cooling tower kind) quit because the pulley came apart. Of course, in the middle of Summer. So, I go look in stock for a Dodge Taper Lock pulley in the right size (I prefer those). Pulley yes, bushing no. Then looked at the Morse QD stock, pulley yes bushing no. Then I took the Taper Lock pulley and bushing down to the "Dungeon" where we only had a drill press and set it up as best I could by eye and drilled the bushing to the approximate shaft size. Then back up three flights of stairs and crawled back in "the box" and put it all together. Flipped the switch and that thing ran PERFECTLY! Since it was ~80+ degrees inside at that point everybody cheered!
Difficult work, well done. Well filmed, edited and presented.
Scratch cut, verifying the thread..... A suggestion learned from a Welsh toolmaker, Ades Workshop... Engage the half nut, turn the chuck manually and watch the DRO....
Verifying threads not only saves expensive material as you mentioned Adam, but can also save redoing several hours of work that had to be done first!
You are so good to explain the why and how. When I was learning in a machine shop in the late 90's as a 55 year old with no training I have learned a lot from you. I just turned 80 and enjoy your teaching yet. I can't do the work now due to loss in vision but can see and understand your teaching. Keep up the great educational class. You may encourage some young people to work with their hands and mind.
Thanks for the ride.
I don't know anything about machine shops but I love watching your work you are awesome very good at what you do thank you my brother❤❤
I love watching Adam dial up stuff in the chuck
Thanks for the show Adam
One thing about the compound. I saw you using an Allen wrench to adjust the the dial. My lathe came out of the same factory as yours, and I had the same problem with the dial on the compound.
The fix was to remove the crank and the dial. Underneath the dial there is a hub with a groove that the set screw rides in. If you get a wave spring from McMaster, you can curl the spring around that groove and slide the dial on top of it. Then the set screw will bear on the spring, and you'll have enough tension in the system to hold the dial in place without it being firmly locked tight by the set screw. It makes a huge difference in the usability of the machine.
You mentioned possibility of using the CNC for this. I really think that even if you had the CNC knowledge to pull it off, you'd still have chosen to do it the manual way. The CNC would simply add more steps and make it even more complex for no gain.
Love your old-school manual machining videos. Thanks!
My Pops instilled in me "Measure twice before cutting once" which feels the same as your "Check with a scratch cut and gauge" before committing to a full cut :)
I was expecting you to face that casting before you took it out- “ just in case it had to go back in.!?😁
IKR 🤔
@@cyrilhudak4568 i thought the same, but then i realized Abom is a pro and only needs the one shot
Love your manual work. Nice.
It is always amazing to me how skilled hands can work magic with a 4 jaw and a couple of indicator dials! Thanks for sharing.
Really lovely to see you doing some proper manual machining again.
G'day Adam. Always like watching your set-ups in the 4 jaw chuck. The threads worked out really well. Great video. Thanks
Nice footage. Something about watching Adam indicate.
Breathing new life into an old part is awesome!
The setup usually takes five times as long as it takes to do the job thanks Abom79 ❤😊
Every video, your skill and expertise shines through, well done Adam
The perfect thing to have a meal to, Abom79s video, what a lovely way to wind down the hours after work :D
This is the leith. Not a meal.
:)
Really good work,Adam.Thank you.
Love the thread cut reflection on the polished face of that boring bar. Almost makes the bar seem to be made of glass. Machinist porn at its best!
Great to see some proper machining 👍
This is fascinating, and beautiful to watch. The precision is mind boggling even for a simple part like this
I’ve watched you for years and it’s so cool 😎 to see such skills you relax me after a day working on modern plastic cars I’ve been a diesel mechanic for 42 years and it sucks
I find it interesting to see the contrast between Abom79 and Cutting Edge Engineering.
I'm referring to the different accents, of course. 🙂
Thanks for such a fascinating comment, we were waiting with bated breath for you to weigh in on the topic.
@@brettbuck7362 The main difference between the two channels is that one covers small-scale projects featuring the use of a variety of precision machines and tools, while the other features heavy-duty industrial-scale projects. I enjoy them both. In only eight words, I followed up with a tongue-in-cheek comment about the difference between Adam's and Curtis' accents. For some reason that bit of humor offended you to the point that you felt compelled to compose a snarky 20-word reply.
Have a nice day.
cutting edge engineering is a one man dynamo. man some of his projects seem impossible and the man spends hours welding up inches of steel. he aint scared of nothing it seems. damn im a lazy bastard lol
Well if that wasn't a masterclass in how to setup a 4 jaw chuck with an oddly shaped component, I have no idea what is. It's one of the main reasons I watch the channel. Excellent stuff.
The manual lathe is probably the most efficient method. Great video!
Rockwell / Delta used to age their large castings (main frames, table tops, jointer beds etc) for about a year. Maybe they did not age their smaller castings before machining - which would account for out of roundness.
Good project to show. Very representative of the type of project i find myself having to do when fixing old worn machine parts. Thanks for the clear presentation.
Another great video. The variety of different angles showing close-ups and wide shots was very professional and I particularly liked the the view looking back where we could see Adam manipulating all the controls while doing the threading. I don’t think I’ve seen this angle before but I found it to be very illuminating. Thanks!
those micro 100 tools really are beautiful
I enjoy watching your videos. I’m an older guy but just gotten into the machinists game. Im blessed to have some older guys teaching me, but I’m also learning on your channel. Working a manual lathe is enjoyable.
Brilliant attention to detail as always Adam, top work my man 😃
What about putting the shaft back in and chucking the outboard end in a tailstock chuck to make the initial setup much easier?
would that work?
Yes I was thinking the same thing, also for what little extra work involved I would have faced the end up.
Sweet! Love those 4-jaw skills!
i love watching your videos to learn all about your new tools. hats off from Amman/Jordan
Great Abom video thanks
Very nice work Adom.
Great job indicating that part in.
Jobs like that can be challenging.
And you do not want it coming loose when machining.
Thanks for sharing. 👍
Amazing skills and patience.
Great work as always! Thanks for sharing.
Always enjoy a threading video, especially in something like iron or bronze. I would love to see a multiple thread being done, something like a double or triple.
Brilliant !!
Thanks Adam .. Goodr refresher vid.
Excellent teacher.
he is good
The overhead shots are really good to help explain the process. Hope to try this soon 😟👍
Glad to see this I have one of these bandsaws might have that problem some day and did I say your a good teacher
It’s a bearing retaining nut on a Rockwell bandsaw, not a part for the space shuttle. How close do those of you commenting really think it needs to be to function? I am guilty of overkill all the time, but I am at least trying to get away from it in my machining.
Nice video,, thank you !!
You had the shaft and both bearings. You could have done the radial and axial alignment using that. I agree, those castings like that take can be challenging and sometimes takes longer to get in then the actual machine work. Missed you at 4 corners!
Most excellent.
Excellent.
As a CNC guy, I personally don’t think a cnc is the ideal tool for this repair job. What you did was the best way to get it don’t for the customer.
good work
Thanks for sharing.
Thank you ❤
That’s a great point about removing an indicated part!!
I was just wondering if it wouldn't have been a little easier to have loosely assembled everything and then use the shaft to center the piece And then just pull the shaft out to machine it
great video Adam
Vary educational, very skilled, very good videos, thanks very much ,ABOM79
I do this kind of chuck work every day Adam it can be painful on a Monday morning 😂
Good stuff
The CNC stuff is interesting. I really like the manual machining even though I've never done it.
I think indicating is my most interesting moment in this job
Love this channel!
Yes new Abom!!
For Adam's next trick, he chucks up a flowerpot in the 4 jaw 😂
A little surprised your didn't anneal the copper before using it. For something like this, I'd want the copper as squishy as possible to take up that taper.
Great Idea.
I love how you are explaining so well what you are doing and why. Great educator! Thank you!
The polish on the thread cutting tool makes it almost invisible, looks kind a cool😂
Yeah, like it was made of glass
Good to know about this utility of copper jaws.
Damn, that is some indicating. Very interesting.
Good idea for the repair to cut new threads. Any reason why you didn't face the housing? Not only would it give a face square to the diameter in a more convenient spot for indicating, but it might look better too.
I was thinking this. Abom commented on how much easier it would be to set up if the face was square to the bore. He could have squared the face even partially. Unlikely the part would ever be machined again but, a five minute improvement would be beneficial maybe. Great stuff as usual 👍
I'm a little out of shape from age and being used as well.
Lol! Me to. I'm 69. Just came back from my friend's bday party. He's turned 70. But spent 6 weeks straight in hospital late last year.
@@ebutuoyebutouy I'm but a youngster at 65. I think it's the misuse that's bent me out of shape... I hope your mate comes out ok.
Merci pour toutes ces explications, bon travail. 👍
Nice
Adam, this was an awesome video. I don't particularly care about CNC, I'd rather watch the manual machining videos. I'll be waiting anxiously for part 2.
Ive often wondered why on pieces like this no one cuts the threads from the inside out instead of outside in to totally eliminate the possibility of crashing the tool ??? Ive seen it done and seems like a good method, must just be in how youre used to doing it.
Joe Pie has done several videos on threading away from the chuck. Once I got used to it I do it that way more times than not. Just comes down to personal preference and comfort with the machine you are running.
I would tend to think that with the dial indicator giving the stop position, and the DRO giving the stop position, and a nice radiused relief in there, and decades of experience cutting threads, he was confident enough to just do it as he did it.
Checking the thread pitch is a good habit to get into. However, for this job, as long as you don't touch the settings, you could cut any pitch in that ballpark. You could cut a 22-1/2 TPI and it wouldn't matter anymore than the odd diameter. Or really make the next guy scratch his head, cut it to a metric diameter with an imperial pitch.
Love these videos
I have the same, but less serious, problem with my Delta. I speculate Rockwell didn't bore before cutting the threads in the as-cast part. After all the setup work I'm surprised you didn't face it.
ASMR quality in viewing this video. Relaxing.