Heavy Turning in the Monarch Lathe: Bradley Power Hammer Bump Stop for Blacksmith Tools

My buddy @blacksmithtools was needing a part machined for his Bradley Power Hammer to goes with the adjustable bum stop. I took a piece of salvaged shafting and machined the part he needed in the Monarch. I used my LNMX insert tool for the heavy turning. These are my favorite chips to make in the lathe. I ending up taking 1/2" passes at a .017" feed rate. Check out Andrew's Instagram page @blacksmithtools to follow his daily adventures of buying and selling blacksmith tools and vintage machines he rebuilds and sells.
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[@JohnWCH]

I've never even seen a lathe in real life, probably never will, but I know "tighten your highs and loosen your lows" from years of watching lol.

[@viccae]

Today I learned something new as a 70 years old toolmaker. Never to old to learn.

[@a.l.419]

Thanks for making these videos. Even though I'm not a machinist, I find these videos very calming. You have a great personality. Keep up the great work.

[@arizonabuckeye]

Same.

[@hubbsllc]

Same! They help me go to sleep!

[@pettergardo3874]

I’ve learned so much from Adam, one day I will have some use for the knowledge. Until then I will just keep enjoying the show. Instead of being fed negative and violence from TV I load up with positivity from people like him.

[@hubbsllc]

@@pettergardo3874 I initially started watching CNC videos on KZbin to help me go to sleep and the algorithm eventually pointed me to Abom79's channel. Whereas many of the videos are also good for relaxation, I've learned a ton about machining and I also came to really appreciate Adam's work ethic - that he's learning and expanding his abilities al the time. I've told my family that watching Adam's videos has made me smarter!

[@zaq55555555555555555]

Jokes on me. I AM a machinist but I still watch his videos. I just can't get away from work. Lol

[@carlfriedrich5316]

When I first found your channel you were making the welding table and I didn’t even know what a lathe or mill was. Now I own one of each and I’m making parts and prototypes and repairing stuff frequently. Without you and your video catalog, I’d still have no clue what a machinist is and how darn cool you all are. Thank you for teaching us with each new project you do.

[@tomoakhill8825]

Adam, I have watched from SNS #3, 10 years? I have been a Patreon supporter of your channel almost that long. My major reasons for starting, and continuing, is watching you indicate. I love seeing you bring the piece into 1:1000th. It is fantastic. Adam, here you give a brilliant Master Class in How To Do It, with reasons. Your commentary about the gap, tight grip, and not breaking the tool, are priceless. You remind me of the comments you got about clamping the yellow hand-crane to the tool-holder. The commenters thought the tool holder would not be strong enough. But listen to that tool reaching the end of the gap. What kind of high force is slamming against that tool-holder on each revolution. Of course the tool-holder can hold the hand-crane.

[@The_Gun_Room]

Love that he actuallu sent a video to Adam showing what the part was for, that was really cool in my book

[@nilsdietrich5563]

Forge hammer bump stop and my friend abom is worried about marring the chunk of metal. That's dedication.

[@cobre7717]

Classic machinist move

[@georgetarabini6552]

We miss ABOM doing ABOM work

[@erichoff7926]

Adam, aside from being a top notch expert in the field you are also gracious and very helpful. You always take time to show new tricks or refresh us on various ways of getting it done. God bless you and your family. Eric

[@namuhtsuj4025]

I enjoy watching the indicating because your so proficient at it. Indicating is hard, yet you make it look so simple and straightforward. If you’re smart you’ll realize that someone that makes something hard look easy has a gold mine of knowledge under their hat. We can catch a glimpse of that knowledge with these videos.

[@wilde.coyote6618]

The longer you indicate on a four jaw, the easier it becomes. Once mastered, you'll never want to use a scroll chuck.

[@billh230]

You, Squatch 253, Engles Coach Shop, and Vehcor. All guys who actually care about the finished product and are willing to explain it to us.

[@mihaj599]

I have said it once and I will always say it. I LOVE, old machinery and tools that our countries built what we know as the Industrial Revolution. And hats off to all that are bringing them back to life for others to enjoy not ONLY nostalgia but the beauty of them.

[@donteeple6124]

Impressive chips.....when your chips come out looking that good, ya know everything's right on...in this day of age of calculate this, calculate that......the OLD SCHOOL ways of listening to what the machine is saying and looking at what it;s showing you can;t be beat, your Dad and Grandpa would be proud of what you learned from them.

[@barrishautomotive]

That trick with the rule was great.

[@ThatGuy-fi9bm]

Man, it’s so remarkable to me that no matter how gross the metal looks, there is always beautiful shiny metal underneath

[@jughead8988]

That trick with the ruler was slick as a frog turd!

[@HandToolRescue]

I took 40 thou off at a time once with my lathe and it started calling me racial slurs. 500 thou is impressive!

[@annacalise8336]

After the insults mine just shut down and wouldn't talk to me anymore lol...

[@pawz007]

Those brass soft jaw pads are great. I started doing that after seeing it on an Abom video some years ago. They might be even more efficient if you cut longer pieces and bend the excess back up so it wraps around the opposite side of the chuck jaws. That way you can slide them on before putting the work piece in and they would hold themselves snug to the chuck jaws. Just a thought. I always enjoy your videos Abom. Youve taught me many things over the years. 👍

[@WreckDiver99]

Indicating is both art and science...I also like seeing you do this, because there are multiple techniques, such as what you showed here. Great stuff Adam!

[@strangersound]

I've said it before, but the industrial arts community on KZbin and the interwebs is a beautiful thing. We're lucky to be alive at such a time to be able to enjoy art forms we otherwise would have never had a window into. :)

[@TonyUrryMakes]

That scale trick to true the piece in the 4 jaw was gold. Thanks!

[@yambo59]

Its a beautiful thing to see the return of big turnings back on the channel, the monarch is purring like a kitty and cant wait to see the new American Pacemaker make its debut in the new shop-!!

[@stevevanvalkenburg5449]

The rule indicator trick was excellent, thanks! Love watching your videos, learn something every time.

[@dewaynestephensen4600]

Great video. I appreciated seeing how the part was going to be used. It added value to your video. Thank you.

[@davidswanson5669]

That follow up video submitted by your friend was an unexpected treat.

[@PenguinMotors]

HI Adam, thats a fantastic tip with the steel rule and indicating, As someone who is not a trained machinist but does have a couple of lathes and a mill ive learnt a lot form you. I think its great how your family has passed knowledge down through the generations. My Dad was a milling machine operator, and i so much wish he had been able to pass his skills down to me

[@kennethjackson7574]

About half a century ago I had done repetitive 3/4 inch diameter reductions in mild steel in one pass. Beautiful curly blue chip. On an 18”x72” engine lathe made by F.E. Reed in 1892 with leather belt drive! The last production job on it was around 1970 with 9,500 pieces. It is now in a museum.

[@kenore4003]

Want to see some chips that go clank when they hit the floor check out CCEngineering down in Oz. Curtis is testing a shaper he moved into the shop and that thing will do some giant cuts.

[@caseyboutillier7510]

This type of video is why I subscribed years ago. Making big chips!

[@ylpsalg]

I spent a lot of time in front of a Monarch 25’ bed lathe making shafts for large industrial pumps. Best part was roughing out taking heavy cuts, those chips are easier to clean up than the long stringy finish cut ones too. Great video

[@TMatt007]

According to my temper chart, you are at the 600 degree F for those chips. That was a fun video. And I would guess that power hammer was early 1800's.

[@smedoz]

Yes, finally, back to some good old turning to keep us old time fans happy

[@foxwood67]

You do what you do Adam. If people dont want to watch indicating they can QUIETLY move on.

[@charliemclaughlin1042]

It was very cool he sent you a video 👍

[@dewiz9596]

I luv watching these tricks. I’m no machinist, but I’ve “built” a lot of bicycle wheels, without fancy wheel-building jigs. The techniques are similar for centering. Its always instructive to watch tricks that span disciplines.

[@jmcc685]

Yes, keep showing us the everyday basics, tips and tricks!

[@NutjobGTO]

I find it fascinating how the chips come off the bit straw-coloured but turn blue sometimes before they're even out of frame I also love how quick and easy you make the indicating process look. A couple taps on the wrench and the needle goes from flailing to rock solid.

[@Dysan72]

The chip discolouration is due to a thin layer of oxide forming on the chips. The heating from the cutting is what accelerates this oxidation process. So the chip is straw coloured but still hot so turns darker before it hits the pan. What's also fun is the the "Colour" is actually an interference pattern from light bouncing off the top of the oxide layer and of the steel below. so the different colours indicate different thicknesses of oxide.

[@Aeronaughtica]

Thank you Adam! I always enjoy seeing the indication process. Something about seeing the needle stop moving around erratically is very satisfying.

[@davenlois]

Another trick learnt. Never too old!!

[@thomaslindroos1667]

The ruler trick was fascinating for two reasons. Because now you can see the tip of the ruler move and here behind the camera it is much easier to visualize the runout of the part like this

[@gusviera3905]

Very impressed with the LNMX insert tool. The surface looks like you just made your finish cut, even though you are taking BIG cuts. Very impressive. Also learned some new tricks for indicating over large voids. Thanks!

[@vulgar5595]

That rule trick is a game changer!!!

[@sopgenorth]

Machining often comes down to indicating being the primary part of a job, and it's always magical seeing you indicate things in so quickly!

[@Snowmunkee]

I don't even recognize your hands anymore. You're a completely different man Adam, glad to see you so healthy nowadays

[@Refrax559]

i kind of wish you had a thermographic camera of some kind so we would see the heat of the tools as they run.

[@MKHNitro]

Been following for almost six years - still love watching you indicate centre on the four jaw chuck That Monarch lathe is just beautiful - your going to miss it in the new shop - it's like your part of it

[@paulvilleneuve9628]

Your channel is a perfect example of three generations of machine shop knowledge and that’s why I love watching it! A big thanks to you Adam!

[@jasonfrary]

This is why I love coming here, it's everything I love to watch!

[@peterhaan9068]

If you start recognizing Abom's scrap metal have you been watching too long?

[@dangelorrrr]

Haven't seen you make this many chips in a long, long time!

[@johnlothridge5899]

Very agressive chips!!! Can't wait to see you doing this on your new to you PaceMaker.

[@gagasmancave8859]

Love the. Ruler trick

[@jimm7165]

Why would we NOT want to see you indicate that 4-jaw. It's amazing every time. Slick ruler trick

[@strangersound]

It's his trademark. :)

[@desolatemetro]

Count me as one that likes to see the indicating! 👍

[@jackrichards1863]

MAN! You have knowledge & skills that just must be passed on to the future generation, I think! I have seen a bit of turning in my life and you make every operation look so natural and correct. Takes a special bit of knowhow Adam Booth!

[@crazycooterMN]

Been machining 17 years and never seen that thanks! Your knowledge makes the internet worth it!

[@johndonlan5956]

The trick of using the 12-in rule and the indicator...... That is so cool! It just screams of "old machinist trick of the trade" type stuff.

[@dons8365]

I am always impressed by your Monarch as to how beautiful the cuts are. Another great video.

[@dereklloyd527]

That really is an awesome trick, thanks for always showing indicating on the 4 jaw.

[@the_Wingading]

That's some big brain stuff right there, lol. Great vid Adam!

[@johanfourie7320]

Im Johan Fourie from South Africa your jobs are very nice and interesting to look at it and I learn from it God bless you and your family 👪

[@theyers]

Multiple entries for chip of the week!

[@scottwilliams3266]

The use of a ruler is great. Thanks for the fantastic tip.

[@wdhewson]

I've never seen such a good bandsaw cut !!

[@tannerhoward5974]

Nice indicator tip I have never seen. I wouldn't use my expensive scale for that.

[@SPEEDY-FABSHACK]

Thank you for sharing the ruler trick, that will come in handy!

[@tomasn3]

Those cuts 😍 I have absolutely zero machining experience but love watching your videos, I find it soothing and hypnotic. And when you use the shaper 🙌🏼🙌🏼🙌🏼

[@user-xc4kh5ch9d]

I would like to call you a good teacher who conveys good knowledge and experience. Thank you very much.

[@Hitagara]

Awesome chips! 👍

[@landrec2]

Great camerawork, nice shots. What a beautiful machine that is! All the best!

[@ianmurray3820]

I can watch lathe work all day long, inerupted cuts with carbide inserts are l edge of the sea nail biters, but you have to keep watching, No apologies or justification req'd for set up time , it's all good!! keep em coming adam!!

[@brentgalye2936]

Adam, thanks so much for the customer reaction, great addition to your vid. Would like to see more of that. Brent

[@jerzykepinski]

Fantastic trick.

[@teterouge1472]

Ruler trick is genius 👍

[@dbriggs1689]

The ending explanation of the part was awesome.

[@maximilianzamboni1117]

Because of you and Joe P. I bought a lathe and a mill started making my own parts. So thanks to both of you !!! and its always a pleasure and very educational to watch what you guys do.

[@maggs131]

In the beginning you advanced the tool slow because of the interruption might shatter the carbide well I sped the video 2x and it still ran fine so you can go faster next time 😉👍

[@NiftyMCD_Australia]

Are you serious? Doubling the video speed does not mean you can double the speed or depth of cut. Not logical. Maybe you mean something else?

[@maggs131]

@@NiftyMCD_Australia that's exactly what I mean 🤭 🛩

[@arizonabuckeye]

That’s a slick trick on indicating. Could you put the indicator way out on the end of the ruler and get a very precise measurement? Or if for some reason you didn’t have a small enough indicator that would allow more precision.

[@AzraelsTear]

I love Machining and Blacksmithing, this project was an awesome way to spend my Sunday morning! Thanks for the share!! 🍻

[@KamikazeWombat]

Always love these. You and the Positive Couple channel need to get together so they can make some epoxy furniture with these turnings, would look so cool

[@bandana_girl6507]

The ruler trick also seems like it would be useful for rough surfaces too slightly smooth out your readings

[@larrycleeton]

Sadly, that beautiful part will be hiding inside the hammer. However, we all know it looks fabulous!

[@marksnyder2232]

I love that indicator riding on the ruler trick. I work in engineering, rather than machining, but design a lot of machined parts. I've learned a lot of practical indicating, measuring, and setup tricks watching you work, so thank you. As the company I work for does a lot of one-off and repair work, I have to think about things differently than if I were making high-volume production designs, and this helps.

[@outsidescrewball]

Enjoyed…amazing depth of cut, yet no backdrag of the tool from the cut pressure, stout machine/sharp tool

[@erlinglorentsen4262]

Uuh not a hint of chatter. That is one rigid lathe. I'm in love 😍

[@adamstephenson3746]

Man I’ve been watching for a long time and always learn something from you thanks for sharing your knowledge with us would love to talk to you some time we just bout the Utectic spray gun and have been trying to use it any way I could message you ?

[@jeremymatthies726]

Very nice. Nothing like some good 'ol lathe turning. Very relaxing to watch for some reason lol. Thanks for sharing the video of what this part does. I don't do facebook or instagram so was nice to see it included.

[@matthewazevedo274]

Never saw that rule indicator trick in all my years. I learned something today. Thanks!

[@TheNoobShadow1]

24:00 that deflection tho holy sht

[@jorgeconcheyro]

@TheNoobShadow1 wow !!! 1/16 maybe?

[@petervanderveer1933]

Hi,Peter from South Africa,nice work,u have passion for your work and teaching people on youtube for free,keep up the good and your skills to people,nice work god bless Peter Cape town sa

[@liveblade]

That technique with the scale across the keyway is like a nugget of gold. In a similar vein, we use to get a rough quick height on a lathe tool using a 6-inch rule being pinched lightly between the cutting edge and the diameter, obviously looking for vertical when pinched, indicating rough center height.

[@Dontmakemereregister]

That indicating trick is awesome! I'm not a machinist but I pick up tricks from a bunch of you talented types that might work on something else I do in the future

[@shooter77us]

At 23:10 when the tool hits the work you can see it pull the tip of the tool down. Hell of a cut going on right there.

[@WinkysWorkshop]

Do you think the mist coolant works as well as oil for cut off?

[@SkalabalaK6]

No it does not, especially when parting deep.

[@WinkysWorkshop]

@@SkalabalaK6 That's what I was thinking but he made a deep cut and it seemed to work well. I don't have problem with cut off using oil but certainly the mist is not as messy. I might have to try it.

[@prpunk187]

Really satisfying to watch those chips fly and also interesting to see where that part went on the machine thanks for the videos

[@jpiccari]

How does Adam always get such great surface finish??? Old, slow, manual lathe cutting mystery steel with carbide inserts on an interrupted .100” doc and 0.012” feed… and he is rewarded with a mirror finish. Damn what is the secret?

[@BravoCharleses]

I often wonder what the secret is myself. We should note that it is very likely not mystery steel. It's a gearbox shaft from his old job. A lot of his old videos are making new shafts.

[@immolationangel4124]

This a a more technical answer to the rhetorical question, but maybe you'll find it useful. I occasionally have to cut stuff to 32μin and such for sealing surfaces, and I ain't about to polish it for 15 min if I don't have to. in/rev^2 / (24 x TNR) = Ra ... (TNR = Tool Nose Radius // Ra = surface roughness) (ex.: .003^2 / (24 x .032) = ~.000012, aka 12μin Ra) If you go with a little bit higher of an RPM than you would use to rough out the material, say 600sf/m instead of 500 sf/m, on a .002-.003 finish pass, it can help give a better finish as well. And Scotch Brite is your friend, the grey stuff is amazing for cleaning up high polish finishes. He probably had an idea that the material was 4140 L80 (80ksi || 80,000lbs/sq. in. yield strength) or something similar. It seemed to cut like 4140 L80. He mentioned trying to maintain 500 sf/m as well. He probably had something like a 180μin finish or so which looked nice on video, and clean/consistent, but defiantly still rough. The finished part looked pretty nice, but he probably wasn't aiming for a sealing metal to metal surface. As long as you go easy on the interrupted cuts, it should give a decent surface finish (assuming your insert doesn't chip or explode) Keeping it cool is very important, otherwise in the small amount of time between the interrupted cut, it can cool slightly, then heat up again when the cut resumes causing thermal shock to the insert.

[@ronburgandy577]

What kind of base are you using for the dial indicator?

[@soundspark]

"Don't worry about the smoke" I don't think my workplace knows what a fume extractor is.

[@pedalman4595]

Honestly watching you indicate has taught me so much. I have been a toolmaker machinist for 32 years. You have a touch that I have never seen before. Thank you for sharing your knowledge!!!!!

[@CleaveMountaineering]

Oh man, that ruler trick for indicating over bumps and threads is amazing. Will have to keep that in mind.