Crusher Part 2

Crusher is about a project of repair, on an attachment for a giant excavator machine and pulverizing concrete is its main purpose. Part two; we start getting the bulk of material turned and find out how old and worn our lathe is.

[@badazrod]

I am here to tell ya, the nicest part of these videos is not having to jump out of your way all the time. I have spent many years learning different trades by being a fly on the wall and learning old school. This is really nice. Thanks so much Keith!

[@vajake1]

I really enjoy learning how to listen to the lathe, and watch the color of the chips. I don't think that I can learn these lessons from a book. Thanks so much for posting these Keith!

[@wb8ujb]

Thanks Keith for another great video. Hope you have a good weekend.

[@davidreaid5700]

Hey Keith, Thanks for all good info. I just got my first lathe, a causing 6913 and getting it and running. I really enjoy you teaching and knowledge that you share. Thank you very much, david

[@markfryer9880]

As per usual Keith you have us regulars well ands truly hooked. I for one am busy second guessing just how you are going to go about the rest of this project. I will be watching this with great interest. Mark

[@wanabear5716]

28 thumbs down ??? Wtf kids of school great work keith,'One thing you cannot buy is knowledge' and keith is giving you the chance to learn new skills for free and takes his time to make these videos i consider it disrespectful..

[@dennyskerb4992]

Hey Keith, great video, Add three hours to the bill for cleaning the shop. LOL

[@BasementShopGuy]

Keith you ever consider a ceiling fan with vent? Smoke wants to go up. Protect your lungs buddy! Awesome videos as usual. I wish cable TV had the Fenner channel.

[@BR99GT]

Thanks Keith, you too! Will enjoy every minute of it. BTW ARNO milling carbide cutters are quite ok, I am using them at work and their performance is quite predictable on alloy, steels and plastics. Keep up the good work,

[@joshtaschuk2153]

Nice Job Keith!

[@kg6tgr]

Your hoist is super awesome. I'd be nervous rotating that giant piece, but you seem to manage like its nothing. Now onto vid 3 :-)

[@Mr74datsun260z]

This makes me appreciate our mazak quick turns that much more lol.

[@KeithFenner]

I love Mazak lathes I use to run two 24" with a 12' bed at Northstar! ;{)------

[@ShuffleSk8Ter]

Hello Keith like always love the lathe work...if you remember you probably forgot but if you do not get the min DOC underneath the hot rolled outer finish it will play havoc on your tool bits/inserts meaning it will dull them very quickly ...I personally do not like hot rolled steel because of the rust(rouge) which will polish your ways and wear them prematurely

[@pierresgarage2687]

Hi Keith, Don't you wish you had chickens that eat metal chips...? Imagine the heavy craps they'd produce after... I did get my hands on a Rohm's constant face driver, I'm eager to try, will save me lot's of side flipping gymnastics and centering. Thanks for sharing, Pierre

[@MrAAAusername]

Hi Keith, I have been following your videos for about 6 months. You have inspired me to get into "making". I plan on buying my first mini mill next month. I was just a little confused on this one. If you plotted the center of the stock from the rough edges, would there not always be a little run out of the part every time you switched it on the lathe. Mainly because the 2 centers are not perfectly aligned. Sorry if I sound amateur, but I am still learning.

[@craigleemehan]

The level of accuracy and precision you maintain blows my mind! Maintaining a thou or less of straightness over 40 some inches; wow! Surely this is your own demanding standards and not what is actually required?

[@thecorbies]

Hi Keith. Same question as Keld Sorensen actually. I hope I'm not missing something here, but I don't understand why you didn't do this job between centres right from the beginning. Like others have said it would have saved all that ending and 'dialing in'. Someone speculated that it was too big to put between centres, but I've seen bigger stuff than this between centres. Regards Mark in the UK

[@KeithFenner]

thecorbies Just my choice to hog off the crust and minimize the chatter! ;{)-----

[@andregross7420]

Does all the locking hardware for your tailstock a left hand thread? You seem to be turning them in the wrong direction from the tailstock on my lathe, whick has all rich hand thread hardware.

[@KeithFenner]

Andre Gross The left hand thread was created by a brilliant man in easing the effort of operation and not having to re-position your stance at the machine to loosen the tail stock! ;{)-----

[@andregross7420]

Interesting, even the quill lock is left handed. I wouldn't of thought that would make a difference. Thanks!

[@georgedelanoy1486]

Hi Keith, I know it has been a cooler than normal summer....but is it really that cold down on the cape? When did you shoot this video? BTW the lead screw is working out just great. Thanks for the help. George in NH

[@KeithFenner]

George DeLanoy This was a job from early spring that had to be put on the back burner, due to being to busy to edit. ;{)-----

[@potlimit2002]

Great video Keith but I have to wonder why you elected to use the 4 jaw chuck?? I know each and every Machinist has his or her own methods, IMO the fastest and most accurate way to do this job would have been to turn it between centers. It would have been a short and simple process to drill a drive pin hole in the end of the pin/shaft. The same set up used to drill the centers would have worked fine probably. Turning between centers would have allowed the whole OD to have been turned in the same set up and done away with all the flipping and indicating.

[@GnosisMan50]

Wow, Keith, you do have a lot of chips flying all over. I'm curious: how much time do you spend keeping the shop clean? As a machinist myself, spend at least 30% of my time keeping it tidy. I don't mind because I like having a clean shop. I like to think of it as a laboratory. I'm also wondering why you don't use coolant. If you did, it could save you time.

[@holmes230536]

Nice video Keith, just one observation, when you were checking the centre drill at the tailstock end I noticed you didn't clamp your tailstock quill before checking with the dial indicator,, is it possible you might have the slightest bit of slack in the tailstock,

[@mayhem7090]

Hi Keith, still a very good video as always, cordially

[@vastylebbq5203]

Great work as usual, Keith. Will you loose any durability by turning off the surface on the 4140? Could you do a "woodstove heat treat" to restore or enhance the toughness of the part? Pretty sweet weather, ah? Hoody and a watch cap on Aug. 15. We were 61 degrees at 6am and are 76 now at 2:30. Take care

[@KeithFenner]

VAStyle BBQ This project was back in end of winter beginning of spring! LOL The heat treat on this alloy is though the whole part, other types like 8620 are surface treated, just a samples of the process of each type of heat treating may vary due to the need for the particular project. ;{)-----

[@aarongarney2118]

I was wondering about the winter clothing too. Haha. Keith is so cool, he's gotta stay warm.

[@bobaroo58]

Enjoy watching your skills Keith!! Did you clean up all those chips yourself? Cleanup is a vital part of work but I never enjoy it.

[@KeithFenner]

bobaroo58 I clean up as needed myself and sometimes it waits until I have a break in the flow of work and sometimes it is a necessity. ;{)-----

[@SirDeanosity]

Told my wife this is a pin for an excavator. She commented that this pin would ruin her clothes. LOL!!!

[@andymandyandsheba4571]

great video keith

[@jonathanpeer9025]

When you are working a large or time consuming turning, do you constantly watch it? Would you do something else and maybe just listen to the work? Thanks for letting us look over your shoulder while you deal with all the different projects that are brought to you.

[@KeithFenner]

Jonathan Peer Always us your ears and when the urge or need to do something else at the same time, you learn to take that freedom and do it, sometimes three machines, if cut timing is good! ;{)-----

[@perspective8944]

This is awesome, i want to see more

[@jackdotzman2908]

Great way to start the day, watching one of your video's. Thanks for taking the time. Don't forget to feed the chickens. JD

[@KeithFenner]

Jack Dotzman Feeding early today with faster uploading speeds! LOL ;{)-----

[@gentharris]

I'm a bit surprised how small the tailstock quill is for a lathe that size! Chip control on finish cuts in 4140 HT is always a challenge LOL

[@AlexSYashin]

Mr. Freeman under work)))

[@breezeblockindustrie]

hi keith great videos if you are welding a flag on the end of the pin to stop it rotating could you not just have turned right up to the chuck to save yourself some hassle flipping back and forth as you would probably have 1 1/2 -2 "at the end where it wouldn't matter also what was the material spec ,was the old pin bent or broken? munchers are an arse of an application for a pin especially if the driver is a bit lazy with a grease gun they either bend them being over optimistic or snap them thru lack of grease then the pins start to gall then break

[@jakeparker1220]

Turning between centers is a perfectly acceptable way to make a shaft. One also must take into concideration the shape of the Ways. If the ways have a dip or worn spot in them, which is the case on older used machines, the shaft will have a wider diameter on one end. Most long bed lathes have more wear in the first 12 to 16 inches from the chuck from " short work", so Keith is probably using a seldom used section of the ways to get a more consistent diameter.

[@DomManInT1]

I thought the cost of your insert was free. So, certainly the cut was worth the cost.

[@KeithFenner]

DomManInT1 I was pleased with the insert and thought it was doing a great job even if I had to buy it! ;{)-----

[@shawnmrfixitlee6478]

Good job man .. Thanks for the share !!

[@markwilliamson1582]

Ya no Keath, watching your vids is like following a really good program like 24, prison break, or something like that, wen it's finished ya get like a, owe no! So now I've got to wait for the next one, so don't delay buddy, don't keep us in suspense! Lol Really like ya vids, I'm learning all the time, like you talked about the life expectancy of a tooltip, that's a question I would ask u if I was chatting to you freely, keep em coming buddy, plz :-)))) Regards, Mark.

[@halleffect1]

Did you get that lathe at Harbor Freight? just kidding..

[@keldsor]

Hi Keith Why not do such a job "between centers" ? ... wouldn't it rule out all this turning the rod back and forth ? You rely on these centers you drilled in both cases or .... Remember I'm just a novice ... learning to walk beside the big guys ...

[@aserta]

I subscribe to this question as well. I thought such a job would be exclusively suited for a between centers work.

[@deathk26]

I could be wrong, but my guess would be that it's too big and heavy to comfortably run between two centers. Just thinking about it I'd feel a lot better with it clamped in the jaws on one side as opposed to it riding on two small points.

[@aserta]

DeathK What about using a center rest?

[@keldsor]

DeathK Isn't that a question of just using bigger center drills and centers ? I once got some center drills from the DDR-day in Germany on ebay and the biggest of them was Ø30mm ... you can bury a very big center in such a hole, I beleave.

[@Opinionator52]

This wasn't a real close tolerance part I think... Cement dust is a multi grit grinding compound. And it's nice to have that grip strength, and dial in accuracy of the 4 jaw.... That of coarse is just my opinion there may be a completely different reason.... O,

[@CompEdgeX2013]

Awww, left hangin again..... well, back to work anyway.. I can nearly vomit when I have to cut of the crusty scale. Rags a'plenty! Colin

[@turtlemann14]

you would like the equipment i work with. my general cut on 4140 is .125x .014Fr at about 375-400FPM. but i also have a 100psi coolant pump which allows me to draw off a clear chip. that material loves to crawl when you take a lot of it off.

[@phitsf5475]

On a chunky piece like this, is sag in the middle of the bar much of a problem? How would you deal with this?

[@KeithFenner]

Tsf Phi no sag problem, holds it's own just fine for the short length it is. ;{)-----

[@RandallMoore1955]

Great lesson, Bad to the bone insert, Dig those chips, Oh by the way my son is wearing one of your hats i got from you in a video i made, C46 natural gas engine, It sucks. But the ball cap sure looks good. Hope thats ok with you Keith. Stay healthy.

[@KeithFenner]

Randall Moore Cool with me!

[@RandallMoore1955]

Good to know. Oh i also am wearing the other Turn Right ball cap because my son ask why dont you were yours to cover up that bald spot that you dont thank you have.lmao he he he.

[@TheSRBgamer63]

That so coll working with those lathe :),u play with metal,can make what u want lol

[@CarterWHern]

what TV program did you watch?

[@KeithFenner]

Carter W Hern I only watch (TWO BROKE GIRLS) LOL a good half hour of stupid humor, stress relief. ;{)-----

[@CarterWHern]

Keith Fenner I watch Two and Half Men for the same reason.

[@dreiseratops]

Keith Fenner gotta love that Kat Dennings :)

[@NOBOX7]

what kind of steel is that kieth

[@KeithFenner]

NOBOX7 4140HT ;{)-----

[@jaketank3217]

Thanks Keith!

[@Fu3R4]

This is the stuff I want to do. Machine shop work.

[@haxx0r1337]

Using waterbased coolant instead of oil will reduce the amount of smoke when cutting

[@lioneltwain7711]

Why not have a tin shield held magnetically to your tool post to shield your guideway. Put it on a pivoting arm like your dial indicator.

[@teena69able]

Steady rest bore you center to relocate. Than go back to your tailstock center. and turn it down.

[@MrMadazhell]

part 3 ?

[@andrewlivesey5147]

Plus, why not 3 jaw with steady up to centre true with first side, then turn up so far leaving enough on to finish, then grip on other side and centre with steady up then finish between centres...

[@bobbyjohnnascar]

No coolant stream?

[@punishr36]

Put your mag base on bar 1/2 - 3/4 X 2 by say 15" long slide it anywhere on the bed in or out. Much quicker and easier.

[@АлексейСундучков]

Чтоб стружка не летела можно было сделать отсекатель из ложки алюминиевой, например.

[@paulthetallsigma1552]

I should expect coolant would be beneficial.

[@andrewlivesey5147]

Difficult for me to watch a cnmg doing such little work, with a cnmg, even on materials like stainless and en24t etc, you could get at least 2.5mm cuts out of them (radially)

[@sixmagpies]

USE CUTTING OIL why not!!!

[@Riyder777]

для чего масло? это же канцероген, достаточно эмульсии

[@bcbloc02]

Happy Friday! Before you got to your finish pass I would have liked to have seen you give your feed another .005/rev to see if you could get a nicer chip that would fall down instead of getting flung all over the shop and making a mess. After I did the Face Off video I have been playing around a lot with increased feeds on roughing passes and finishing with a different insert and I have been super happy with the results. I have probably cut many of my turn times by a 1/3 and have been getting much nicer chips that just fall in the pan. I did a video kzbin.info/www/bejne/oJXUfXqerJaij9E showing some of what I have found and I hope maybe it can help some others out there in the machining world. Much of the info I have found out there that is current applies mostly to turning centers not slow speed manual lathes, or even machines that don't have enclosures!! I found one insert that will break a chip in aluminum or steel at just about any light cutting condition but it sprays the guy behind it like a sandblaster with hot metal. That might be fine in a VTL but it isn't worth much to me!

[@heuzierdaddee9459]

Video freezes at 0:29 every time. Ugh.

[@davelister1]

Lathe tastic !

[@WAVETUBE84]

Crushing it.

[@NOBOX7]

i bet a guy like you used to burn allot of Rope in his day,lol

[@darrylteichroeb9132]

Moar!

[@andrewsommers8298]

you would get better too life with a heavier feed. get up under the scale.

[@timothymunday1338]

jebleous