Line Boring an Excavator Thumb on the Horizontal Boring Mill

Рет қаралды 11,551

2 жыл бұрын

Topper Machine LLC is always learning new things. This particular job is no exception. These parts are hydraulic grapple thumbs for Kubota mini excavators. When I ran these parts several months back, I had never line bored, and I had no idea where to start. So I built our own Line Boring Bar, and ground some HSS bits, and figured it out. Now you can learn from my setup how it was done.
Watch as our 18 ton Lucas horizontal boring mill makes quick work of these 30 lb parts.
Since this is only our second time doing a line bore job, I am still learning. So, if you see anything that is not right about our setup or process, feel free to point it out.
Topper Machine LLC is an entirely manual machine shop located in Spooner, WI. Our videos will highlight some of our shop work as well as the sawmill we built in the shop and our A.D. Baker steam engine, and others we work on.
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Пікірлер: 81

@gwharton68 2 жыл бұрын

Ypu always learn. Not only great video but the music is great also.

@51ubetcha 9 ай бұрын

I truly enjoy your video content, especially being a fellow Wisconsinite. I also really enjoy your choice of music. It always has my feet tapping when watching the vid's.

@johndonlan5956 2 жыл бұрын

Line boring...... That is a true art form my friend!

@460faceplant Жыл бұрын

Your second go around looks perfect, as they say sorry I blew up. Exhalant work.

@jeeprenegade1985 Жыл бұрын

Once you get the boring bar in the pillow bearings and before clamping the bar in the collet, put a dial indicator magnetic base on the machine spindle and put the indicator needle on the boring bar. Rotate the spindle 360° and move the table and head around to get it centered with the boring bar.

@theessexhunter1305 2 жыл бұрын

Watching from the UK, nice work al the best from a manual miller from the 70's

@ypaulbrown 2 жыл бұрын

really love your Marvin T Shirt.......

@glenncpw 2 жыл бұрын

I also was going to tell you about Kurtis - some one else got in first. The mill looks like a neat tool, I enjoy your videos also. Cheers Glenn (Australia)

@billdunlop8683 Жыл бұрын

Ya gotta hand it to guys who always want to improve the process, well done sir.

@railroad9000 11 ай бұрын

Love the music and the videos!

@junkmannoparts9696 2 жыл бұрын

Nice job in the first one you could see the spindle end walking the second one was spot on . I have never seen a machine like this in operation . Thanks JM

@TopperMachineLLC 2 жыл бұрын

I hadn't seen one either until I bought this one.

@joell439 2 жыл бұрын

I suspect it is immensely satisfying using the boring machine. 👍😎👍

@TopperMachineLLC 2 жыл бұрын

It is. It's a beast and capable of doing so much fun stuff.

@paultruesdale7680 2 жыл бұрын

There is another alternative to using a long boring bar. You can use a 360 table, Sunstrand was what I used. Set the table in line with the machine table, indicate the center hole. Move to the first boring position. Record the datum to the center hole. Bore the first side. Rotate the table 180 degrees and move the table in the opposite direction by the first offset amount. Bore the second position. Both holes will be inline with each other. This method allows for shorter more rigid boring bars and cutters in most cases. Great channel, new subscriber.

@GardenTractorBoy 2 жыл бұрын

This looked like a fun procress to learn, thanks for sharing what you did

@captcarlos 2 жыл бұрын

Good video, yes, rigidity is King! A tool you need is a snap gauge that fits your bar so you can measure the hole without braking your set up down. CEE uses one with his portable unit. Shows that technique of measurement every time. Then uses a dial gauge to adjust the cutter. Just a suggestion.

@TopperMachineLLC 2 жыл бұрын

Once I have it dialed in with the planer gage, I had no need to measure any more. They all came out within .001 which I was happy with. But I'll be looking into more tooling as these jobs keep coming. Thanks for the suggestion. I like @CuttingEdgeEngineeringAustrailia videos. Karen does an amazing job at editing.

@bostedtap8399 2 жыл бұрын

Nice setup, another string to your bow. Thanks for sharing.

@kooldoozer 2 жыл бұрын

That HBM is king of the shop ! ! ! Looks like yours is a later model machine. I have seen some ancient Lucas boring mills. Yours looks much modern. 1970s I would guess. ---Doozer

@TopperMachineLLC 2 жыл бұрын

June of 1963. It's in great shape. Definitely a work horse.

@jpsimon206 2 жыл бұрын

I have ended up collecting six of those Lufkin planer gauges. I got them originally because adjustable parallels were ridiculously priced, I almost always buy used, I guess because there aren't many planers around The gauges are now cheaper than adjustable parallels. I use a two-piece vise most often, so the added width is a big help. I really don't understand why these things don't get more air time. I don't think I've paid more than 15 bucks for one, and I just do not stop finding new uses for them. Incredibly useful, particularly the Lufkin with the large step and the round rod. they make a great ad hoc height gauge, and it is much easier to set two to the exact same height then with adjustable parallels.

@OldIronMachineWorks 2 жыл бұрын

What a sweet machine. Thanks for sharing Topper. Gary

@glennnowakowski5302 2 жыл бұрын

Nice job, Nice Machine, Looks like a nice Shop. I'll have to watch your shop tour.

@VadicherlaSureshreddy-nv1gz 10 ай бұрын

Good work

@endemiller5463 2 жыл бұрын

Why don't you add a 2nd..........Oh you did - Great idea!!!

@AaronEngineering 2 жыл бұрын

Absolutely amazing Josh. Man I love your workshop. You should charge admission for KZfaq machinist to come and visit. I’d love to hangout in your shop for a day. Cheers 🍻. Aaron

@TopperMachineLLC 2 жыл бұрын

Whenever you make it to the states just swing by. No admission fee,just a free tour and good conversation.

@stovepipe666 2 жыл бұрын

good job on them i use a double knuckle joint with a mt5 shank on one end and connected to the boring bar the other, takes out any misalignment

@ypaulbrown 2 жыл бұрын

what a fantastic channel.......wishing you all the best in the coming years....cheers from Orlando, Florida.....Paul

@danielelliott3659 2 жыл бұрын

I have done alot of line boring wit boring bars I have built myself. I use round holes in the bar. I have never broached square holes. The round holes work fine and are easier to make

@srchastain859 Жыл бұрын

Might also try to add a universal joint or c.v. joint between the boring bar and the mill. My old circle saw mill is how I know!!

@pastortomolson 2 жыл бұрын

Great job... Both machining and video. I need to draw up that draft door handle to have you make.

@TopperMachineLLC 2 жыл бұрын

Get on it, Tom. I'm looking for stuff to do.

@fredflintstone8048 2 жыл бұрын

Adding the second bearing reduced most of the 'weeble wobble' on the boring bar. Very noticeable on the video.

@realfixesrealproblemssewel82 2 жыл бұрын

Very brave using two cutting tools at once. Fair play though. It could be why one hole was bigger than the other? Nice job my friend

@hilltopmachineworks2131 2 жыл бұрын

Only way to learn is just do it sometimes. Enjoyed thanks.

@TopperMachineLLC 2 жыл бұрын

It was nerve racking in the begining, and the customer needed 5 day turn around. Having never done it and no tooling, it was a race to figure it out. Worst part was waiting for the square broach to arrive. Then it was less than a day to make the tooling and learn as much as I could and produce. But, that said, I enjoyed every second of learning it. Thanks for watching.

@brucelott3583 2 жыл бұрын

Look at Keith Fenner's channel, he has an older video showing how he built a long boring bar to use in the lathe. He used some inserts that press into a round hole but they have a square through hole for tool bits. I think they are also threaded on one end for a set screw to adjust the cutter. Your setup did the trick but square broaching that material can't be fun. New subscriber!

@TopperMachineLLC 2 жыл бұрын

I did watch Keith's video. If it was a larger bar I could have done that. Being only 1", this was my best option. Broaching wasn't bad at all since it was a short hole. Thanks for watching.

@kentuckytrapper780 2 жыл бұрын

Good setup, I line bored a excavator knuckle on my sebastian lathe, it was a learning experience but I got it. MSC sales a square insert that is adjustable for boaring bars the outside is round and the inside is square with a adjustable set screw in the end. Great video Josh, keep'um coming..

@TopperMachineLLC 2 жыл бұрын

Could you send me a link. I'd love to get something like that. I'm hoping to do more of this work and bigger.

@kentuckytrapper780 2 жыл бұрын

MSC. SQ.hole sleeves part# 82432287 for the 1/2" they have all sizes

@TopperMachineLLC 2 жыл бұрын

@@kentuckytrapper780 thanks. I'll be getting some to make more bars.

@kentuckytrapper780 2 жыл бұрын

@@TopperMachineLLC I made a 2" bar out of a hydraulic Jack steam it's one of my best.

@460faceplant Жыл бұрын

Looks lke your bar had a lot of side flex.

@westweld 2 жыл бұрын

Howd you know you were perpendicular to the z axis did you indicate the side of the part?

@TopperMachineLLC 2 жыл бұрын

These are fixture built, so I had indicated the side and set stops. Worked great. I may build a fixture if this is a continuing job.

@dermotkelly2971 2 жыл бұрын

Good to see you are getting in some work. Is it enough?

@TopperMachineLLC 2 жыл бұрын

This are are picking. I had plenty all along, but not enough to grow the shop. Things are looking alot better. A new lathe may be in the works.

@tallswede80 2 жыл бұрын

Cutting edge engineering Australia does line boring on excavator equipment.

@TopperMachineLLC 2 жыл бұрын

I've watched Kurtis work. He is one that I watched to learn how to do this.

@tallswede80 2 жыл бұрын

@@TopperMachineLLC What did we do before the internet

@TopperMachineLLC 2 жыл бұрын

@@tallswede80 read alot of books! You should see my collection of machining books. Thanks for watching.

@tallswede80 2 жыл бұрын

@@TopperMachineLLC But why read a book, when you can find a video of someone doing the exact task that you are trying to do?

@markabramski1365 2 жыл бұрын

Nice work and a nice set up. What do you use as a retention device for the HBM tooling? I've got an old Universal HBM and need to come up with something

@TopperMachineLLC 2 жыл бұрын

If you're referring to the keeper that locks in the Morse Taper tooling, it's called a boring mill key. I built mine, and might build another someday.

@markabramski1365 2 жыл бұрын

@@TopperMachineLLC Yup, that's what i'm talking about.

@alt-w7130 2 жыл бұрын

Check "Cutting Edge Engineering " he have line boring to the tee

@jimmymcleod5953 2 жыл бұрын

What is the runout of your pillow blocks?

@chief8388 11 ай бұрын

Fantastic work. I will never understand speeds and feeds... This seemed so slow while others run so fast and hog off so much...

@TopperMachineLLC 11 ай бұрын

Difference in tooling. This is a small bore so I run HSS. Slower speed and feed. Carbide can run much faster.

@martyjohnson4111 Жыл бұрын

Just wondering why you have the table out so far? Would be way more rigid if you brought your table all the way in.

@mikeking7470 10 ай бұрын

So the radius of the boring bar plus 0.249 cutter height gives a 1.5-inch bore? (I don't think you ever mention the bore size.)

@TopperMachineLLC 10 ай бұрын

(Radius + Cutter Height) X 2

@kmcwhq 2 жыл бұрын

How much does that Lucas weigh? Looks like a lot of iron for the size of the machine. Nice work.

@TopperMachineLLC 2 жыл бұрын

37,500 lbs. It has a 20,000 lb table load capacity.

@jpsimon206 2 жыл бұрын

For years I have had a tool that nobody has been able to identify. I'm just realizing that I think it goes to an HBM. It looks like a chuck body, about 9 in and 8 in thick. It does not have a back plate but there are four lightening holes. Every 20° around the circle there is a holder for a quarter inch HSS tool. Sort of like a lathe turret. The difference is all of the tools point the same direction as the face of the tool, like a giant facing mill. It has cutters in all of those 18 holders, but they have very slightly different geometry than each other. I assume it is like those face mills that have a rougher and a finisher on the same disc. But I cannot understand why there are so many cutters, nor why the head is so heavily built. Between watching your HBM and Brian blocs, I get the impression they have a similar capability to a boring head? This is the only feasible explanation for this tool that I can come up with. Does it sound familiar to you in any way?

@TopperMachineLLC 2 жыл бұрын

Email me some pictures. I'm curious myself.

@nschelling6420 2 жыл бұрын

What “size” HBM is that? Bigger than 3” I take it?

@TopperMachineLLC 2 жыл бұрын

yes, its a 4". Wish I had a 5" some days, but its been a great machine

@nschelling6420 2 жыл бұрын

@@TopperMachineLLC What makes you desire the larger size? I have the chance to buy a 3” HBM; seems large enough for most of the stuff I might run into. What is your thought on the HBMs that have a “tailstock”?

@TopperMachineLLC 2 жыл бұрын

@@nschelling6420 I do alot of big stuff and a bigger machine would help. If you have the chance to get one with a tailstock, buy it. I wish I had one. 3" machine will do almost anything.

@nschelling6420 2 жыл бұрын

@@TopperMachineLLC The mill in question is a Pfeifer and apparently has a weird taper in the spindle. The odd taper is something I would want to sort out before pursuing it further.

@TopperMachineLLC 2 жыл бұрын

@@nschelling6420 I've never heard of that make. But if it's not a morse taper or a national taper, I'd stay away unless it has tooling available.