Monarch 612 Lathe Restoration: Machining a New Lever Handle Bushing with a Square Broached Hole
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- Опубликовано: 29 фев 2024
- Monarch 612 Lathe Restoration: Machining a New Lever Handle Bushing with a Square Broached Hole
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I hope your weight loss is intentional and not the result of poor health. I noticed because the way you sound when you speak and breathe has noticeably improved. Congratulations and well done.
It is always amusing to watch someone that really can fit a square peg in a round hole!
The small things that irritate every day and make life so much more pleasant when resolved.
Ginger the shop supervisor. There for all aspects of inspections and advice.
Ginger is the ultimate cute photobombing pet!
Wonder where Marion is...
Keith, give ginger a nice pet when she is trying to help out.
I’m a machinist,working in a machine shop, watching another machinist machining on his machine.
Machiners Rock!
That was fun! Thanks!
25 of my 37 years in the aerospace industry have been in the machine shop environment. One thing that I have learned is the importance of “Clean As You Go”. I understand that you’re not building anything untra-precision, but… it’s just good practice. I think that you will find that you will not need a hammer so often 😊.
Just happen to have a 3/4" square broach. 😅
When you spend a lifetime collecting tooling, occasionally you oughta be able to "just happen to have" the tool you need. Not often enough that your wife can start spending the tooling budget, of course.
And a press with sufficient height to push it all the way through!
Lathe work has always been my favorite! Many years ago, I started a new Engineering job, and the "Model Shop" was right next to the Engineering department. The MS was "off limits" according to the sign. One day I had a little "personal" lathe project to do and went in and the lathe was barely bigger than a tabletop machine. 6' travel, about an 8" swing (if that). Thing was COVERED with chips and swarf! Before I did MY project, I cleaned that whole thing. The Chief Engineer came in just as I finished and looked at it and said: "Ok, you are now allowed in here."
I’m amazed there were no pesky burrs on that square shaft when you pulled the handle off 😊
Cat has same concerns about the lathe😊
Seeing that square busing just slide on is so satisfying
I recon the "gasket lookin thing" was a wiper/oiler and it plays a fairly important role. Might get tight if chips get in there.
14:12...PARTING IS SUCH SWEET SORROW-(?)
(snucker-snucker-snucker!!!)
Channel's new name? The Keith and Ginger Show.
Nice work Keith.
Hey Keith, just wanted to say, you're looking great these days!
Dear internet mate Keith, From a fellow machinist/engineer type. Please give a brief summary about Ginger the cat, I am constantly puzzled/concerned about the fact that he`s still alive! In a workshop full of comfortable warm motors, drives etc how has he maintained a full length "question mark" tail? and why has he been denied steel toecap boots?
Maybe should take a wire brush on a grinder to clean thar square rod and maybe dressed it up with a fine file while you were in there, then give it a good light lube to help prevent it rusting a bit (maybe could still do it as there's plenty room to get to it anyway lol).
Every little helps 👍 👌
It's a lot easier to run a file over a small part than to mess around with that square rod and possibly cause other issues.
@@danielbutler578 I could see that if it was load bearing, intricate or if it was used for several operations but its just to turn it on or off/start or stop, I know you guys are all about 'patina" function over form sometimes? 😆 🤣 😂
Good morning Keith. Thanks for the videos. Have a great weekend!
Love the fact the shop cat comes to see what's going on.
I wonder if Keith films those bits just before feeding the cat. :)
You always have to check on your human so that they do nothing stupid.
@@prillewitz, That’s a full time job for some of them! Lol
@@Scodiddly 🤣😅🤣🤣
I like nice animals as well. I like cats, dogs and birds.
However, among the dogs, I prefer the educactionally suited ones with great intelligence, and with a moderated agressivness, so as not to attack people for no accepted reason. For this reason, I prefer female German Sheperds, whom are generally nice and easy to train. Not that they are weak in the defence, but more easy to control.
The bite in the arm is hard and painful in the play with sticks, should the dog miss and take a bite in the arm when you fint them.
One mistake, a friends young girl made, was to draw the stick to her belly in the strife, so the dog catched her belly-skin in the bite of the stick. Just a nasty blue-mark and some whining. She witnessed though, the dog did not bite her on purpose, just a mistake.
This female German Sheperd's greatest fun, was to stride and meter who was the strongest, fighting sticks back and forth, dragging.
Sometimes I let her win. Her tail straight up in the air, head raised, trotting with great pride.
Interesting. If I ever have a question, you answer it, usually within the next 30 seconds of video. This time I was (idly) wondering why you didn’t show test fitting the unmounted, broached bushing by slipping it over the square shaft. This time the answer showed up in your adjustment toward the end. Thanks for the video.
Thanks Keith. It's nice to see your machine getting better and better. It will be as good as new without the new price.
Always a nice visit with you Keith. Little things like this really make a big difference.Having full sized broaches on hand is a real blessing.
Nice work Keith.
The Monarch is really turning into a Gem with all of these fixes and repairs you are doing.👍
Thanks for sharing the process.
Have a great day.
Thanks for the video Keith. It good to see shop jobs. Have a great week!!
(Seeing it in action with the lathe on would have been nice)
Nice fix , like you I don’t like equipment not to be functioning as designed, sooner or later lack of service and preventative maintenance and replacement of wearing parts causes a significant problem, better to attend to it .
Thanks for the video!
Ginger approved 😀
Thanks. I enjoy the commentary even if I'm not paying full attention every time.
You know you are doing something good when the part you are turning says "right there"...!!!? 13:48
Happy Friday Keith! 😊
Very enjoyable watching the use of a square broach. I got the feeling that we may be seeing a forthcoming video about adjusting the bearings on the lathe you were using.
I remember the first time I saw a square broach being used and thinking: "So that's how you make a round hole into a square one."
Whoever invented the broach idea should have gotten a Gold Medal!
Yes, that looked rather alarming!
Thanks for sharing!
When I see someone pushing a broach trough a hole it always makes me nervous it will break, when I heard how expensive they are it only makes it worse.
Great Work.
Aw. I was looking forward to learn how to borach a hole.
Ginger kitty!!!
Keith:It's not a leaver It's a lever.
Keith, Ginger, like us, sure seems interested in this lathe restoration! She mush have some machine work in mind for you to do on her litter box once this project is done!??! 🤪
Really nice repair. I always enjoy your explaining what you're doing. Thanks. ( and I like your cat)
Fits and doesn't wobble!
excellent job well done keith.
Another great video fixing up the Monarch Lathe. Thanks for sharing,
I see Ginger almost every video but haven’t seen Mary Anne in a while. Is he ok?
I hope she's become a house cat, but 'm afraid something happened to her, I've asked a couple times.
Thank you for sharing. Nice repair.👍
We've got a brand new $65,000 large here at work and we can't use it "until testing is complete." Testing??? It's BRAND NEW??!! Ridiculous. Broaches are always satisfying to use. Well done.
Great Job Kieth!! .. I've had occasion to make square holes by slowly and carefully filing each corner, (after drilling) with one of my big square files, I'd probably choose brass for this job just to save filling time :)
I to have done this job a few times, well done.
Final proof you can put a square peg in a round hole !
you have good video skills
Hi Keith. Great content as usual. I was just a little bit concerned about the noise your green lathe is making. It sounds kind of rough. Chatter ? Weird since you seem like you were pushing it that hard.
ol green lathe has sounded that way forever and i stood beside him running it. the machine is rock solid.
As always, well done a nicely presented. Not having such a broach, jungle methods a la Tubalcain had to be used....
Time 17:35. No testing that it fits the 4 sided rod? Guees it was done and was positive.
Time 20.47. We have the same hair style.... It's like a lighthouse when landing the drone.... Bright heads.....
Time 25:16. What about the left handle? It's good or uninteresting?....
Great little project!
The audio sounds great.
Nice repair Keith !
The retention screw used to keep the bushing in place is called a “Dutchman” not a key.
Thank you Keith! This was an interesting repair.
21:20 Great Fit, that will break in, in a week or so, no problem!
Absolutely fixed. Thanks for sharing.
Yes Kieth it is know as a Dutch key
Sorry Keith, that hand wheel on the tail stock still looks wired that way round.
Hmmm, new microphone?
I think the fiber/leather washer is intended to be a wiper, to wipe crud off the square rod before it goes into the bushing, to keep it from wearing out so fast . It needs to be a tight fit or it packs it onto the rod.
to perform such a job, you need to have on hand more than 1 machine
very good job
very good video
Great video thanks for sharing
Thank you Keith!
Very nice job, Keith.
A satisfying fix.
Good Job
Thank you for another great video. Cheers
Broaching always made me nervous. I had a couple splinter on me. Wouldn't putting a set screw through the handle to the bushing be easier than drilling and tapping a key directly into the bushing?
Well done! I enjoy your videos. Best wishes.
1:24..."SQUARED AWAY"-(?)
(snucker-snucker-snucker!!!)
New subscriber here. What a wonderful machine.
Will you replace the other handle bushing at the lever at the motor end?
Nice 😎😎😎👍👍👍
Think I would have painted up my handle and cleaned up that shaft while in there. Makes that apron slide that much easier. On that old girl it’s a bit of a task moving that sucker from end to end. Get ya a good workout anyways ! Keith is going to be buff and strong by the end of summer ! 😊
I'd simply harden that bushing, like 100x less wear over time ;-D
Then the rod would wear. Which is easier to replace.
Knowing this piece is a problem, I would have been tempted to redesign the piece to be at least twice as long for increased life, even at the expense of very slightly reduced effective bed length.
Two ways the part could have been made more durable with less wear in the future. Machine from 4140 steel without hardening or case harden the finished part. 4140 is the better choice since case hardening tends to distort the part. However, the hot rolled part will probably last another fifty years with little appreciable wear so no real concern.
Keith - may want to check the top left (if facing machine) of your press, the bolt and plate holding the table seemed to have a bit of play in relation to the throat the table is mounted on. 16:22 thru the end of the broaching process.
Any arbor press is going to have a slight amount of play in it. If it is too tight you will be dealing with too much friction. That's why you let the pressure off the broach frequently to prevent binding or breakage. Noticed that he was doing that and if you watch closely, you can see the broach move slightly when he released the pressure.
I noticed that too, Daniel, but it appears that the bolt has not pulled the table/plate up against the back of the throat. Was just mentioning it as something to check.
it will wear in before it wears out
We see a lot of Ginger, but where's Mary Ann?
Is the Stoker Engine ever coming up?
Nice work as usual. I suppose such a broatch cost a great deal of money.
My guess is that that may be the original bushing but it has been turned twice to present a sharper square corner to the square clutch rod.
wonder if it had been replaced twice already because they just tweaked the bushing but kept the same wiper plate
Is the sister lever on the left not in need of repair? I see it move up and down with the movement of the repaired lever?
The thumbnail shows the hole is "borached" , if true, it wouldn't be square! Good video, despite problems with my youtube.
If you have a good square broach it will be square. He's not using a broach for cutting a keyway.
tell us what "borached" is ?
was the original bushing bronze? easier to replace the bushing then the square shaft?
who else put the video back to the start to watch the cat jump down? haha! some odd microphone sounds and compression things going on.
Passed the CAT scan.
Thanks once again Keith for an informative video. Looks like your lead hammer could use a little love or recasting. Also, how do you keep Ginger from jumping up on your machines while using them and keep her paws out of chips? Just curious. Thanks again.
Keith,
Would it help if you put an oversized hole in the bushing and then lined it with a UHMW, Turcite, or a reinforced PTFE material? This would help reduce friction and wear.
Bob
here, there and yodder? That's a new word to me, interesting or was he trying to say yonder.
Rather than persist with the grub screw lock to stop rotation, it would have been a simple broaching/milling exercise to resolve the defective design by creating a key way.
It might not hurt to run your precision stones on the square bar and take of any high spots or buts.
Am I the only person who, after years of watching Kieth, says out loud or to myself, "got that knocked out" after doing just about anything?
ive used this term on occasion too. it has its place
I'm curious why you didn't make it out of bronze/brass again? Going with steel will wear out the square rod too, won't it? (The much more expensive to replace part.)
The old one was also steel, at a first glance it looked yellow but I think it was a layer of oil
Sounds like you have a worn bearing in the Monarch??😮
Puzzled as to why mystery metal was used when it seems that brass would have been best?
That Monarch appears to have two feed shafts - why is that- one for longitudinal and one for cross slide feed??
Someone explain please.
Bob (Edinburgh, Scotland).
Bob it has two “rotating shafts” one is for the power feeds of the apron, and the other is only for threading or “the half nuts” the third rod you are seeing is only for the headstock control switch which is what Keith is fixing here. It’s on a shaft that runs back up to the headstock so you can control the headstock from the apron or the headstock itself. On longer machines you Don’t want to have to walk up to the headstock to power up the machine and then walk back to the apron if turning on a long workpiece.
Hope that clarifies your observation Sir.
Have a great day.
i run a lathe 40 feet long and you explained it well.