Motorcycle Rim Repair: It's how you look playing the game! Part 5

[@clydeperrine2959]

Watching this series reminds me of my time as a young man working in a motorcycle shop. Being also a motocross racer I learned how to modify cylinders and pistons of 2 stroke engines. The shop had a machine used to bore new surfaces onto the steel cylinders sleeves pressed into the aluminum castings. The boring machine would start at the top of the cylinder and move down while it cutting new a new surface. I would use a drill with honing stones to put a nice crosshatch as the final finish. I was a perfectionist about it, using a micrometer to measure the inside bore to factory specifications. I have an appreciation for guys who work as machinists like you do, and I thank you for bringing back my youthful memories.

[@chadjjohnston]

machining school is out for christmas break but the learning keeps going on. Thanks Kieth

[@marcusjenkins]

Superb demo of setting work for second operation in 4 jaw and metrology practice. I learned sooo much, thanks. It's also really nice to see a true pro doing some things the same that I've learned in just a few years of hobby work. Like not trusting the vernier calipers, but DO use them for backup & keep switching. I especially like the digital calipers to read the coarse value & then the mic for the fine reading since I'm quite likely to make errors on reading the vernier style readout +/- 0.5mm

[@GRMS_Ian]

Thank you Keith for another rich-with-info video. The name I regularly use for your "Guessto-meters" is "Very-near calipers" :) it reminds me that they can only get you near but not all the way...

[@TFB82]

Oh, I know what you were doing. You were demonstrating how when you have your parting tool hanging out so much to part thick stock, it can skew and hollow out the face. You referenced both the OD and the trued face which I would have done too. I was suggesting that indicating the bore to further demonstrate your point would have just been icing on the cake. Thanks for the videos!

[@Bowtie41]

An old shop I worked in had a 4-jaw centering chuck.Wasn't any more practical than a 3-jaw.It was worn,and if you had any runout,you still had to shim a jaw or two.A few of our Clausings had 6-jaw centering chucks.Those were sweet!

[@iiredeye]

Yes we have a self centering (concentric chuck) in our shop, it only really gets used for turning square sections, which it is very good for, although you have to make sure the part is pretty much square before you chuck it, we also have a bigger independant 4 jaw, a bit like Keiths, that gets far more use.

[@Bowtie41]

Liked the sped up laugh!When you first said 1.040,and grabbed the 1-2" mic,I thought "uh-oh",lol,but it finally caught up with you!

[@stanleyrodgers3375]

Dave, the one Keith has looks similar to the 670 indicator hole attachment series in the current Starrett pdf catalog online at Starrett's web site.

[@SlowEarl1]

great video showing different measuring instruments.

[@johnnybarbar7435]

Keith, If you measure the two contact points distance apart and are then able to determine if the fulcrum or pivot's center is equal to 1/2 that distance, then it is a true reading attachment.

[@KeithFenner]

Thanks for the comment and the chuckle, is he interested in your work? ;{)-----

[@MitchEllis-e4y]

Some parts houses that turn rotors and drums have dampening belts to go around the rotor and drum and really reduces tool chatter.

[@cryoburned]

I work in a wheel and tire shop, and we too use vinyl tape on our jaws to protect wheel faces from being scratched by the jaw teeth

[@KeithFenner]

I keep it, time and material, at the beginning I can guess a high, not to exceed, cost and if it falls short of that price, I charge just what it took to complete the job, customer saves, if it took a bit more, or I added in some extras, I cover the cost and call it paying forward on some advertising.

[@widerman226]

I like to take parallels and put them in between the jaw surface and the work piece to get it square.

[@Ron_EZ]

Keith, nice "Franken-lathe" you have there; IT'S ALIVE! LOL!

[@lexbreijs8792]

hello keith. first of all i enjoy watching your videos very much, thanks for sharing your craftsmanship. ive been watching quite alot of your work and i have to say your perfectionism is getting intimidating after a while. could you do me a favor and make a video on some of your mishabs and fails (if there are any) so i can verify that you are human and not a machine. i dont mean to compete, it would just build my confidence to trail and error my way to perfectionism. thanx !! greet lex

[@MitchEllis-e4y]

Talking about what some machinists refer to as a guessometer(linear caliper) most of the KZbin videos showing Vietnamese and Indian or pakastani machinists use a slide linear caliper that only has markings on the metal no dial no digital indicator. Most center their work using a bent wire attached to a weight or magnet and eyeball the trueness of their runout. They rarely bring out a dial caliper, RARELY, but they machine stuff all the time like that.

[@alehax27]

Impressive 4-jaw centering skills.

[@KeithFenner]

You do want your indicator, pretty close to being straight in line with center axis and as close to 90 of the lathe center line, because the indicator movements work easier or more freely! It is not the end of the world if it’s not perfect! Also it can be held anywhere around the circumference. You may find yourself some day, indicating inside a bore, looking at a mirror to read the dial and chances are it won’t be perfectly aligned. ;{)---

[@ralphmotorhead]

I really appreciate your videos. Thanks.

[@62346]

Keith, Do you know who made that indicator fixture you used to get behind the work? Thanks the the series and have a great Christmas! Regards Dave

[@KeithFenner]

There is no DRO on my lathe, but I do use a Trav-o-dial that is mounted on the carriage. ;{)---

[@chuckthebull]

Funny i thought i was being all clever sticking my 4 jaw in the three jaw...nothing new under the sun i guess..... .. great video as usual.... Thanks

[@KeithFenner]

I have in the past but I don't do production so a waist of time and money as far as a repair shop goes. It would be nice once in awhile! ;{)---

[@guillaumeruwet4311]

Just love your laugh at 13:50 min !!

[@MitchEllis-e4y]

Part off blade can flex and move a few thousandths I would assume depending on lathe Chuck, spindle and cross slide/tool post and tool mount rigidity related issues and what your parting off and how sharp and deep your cutting to part off something I would think. It’s not like a rigid cutting tool. But, I’m NOT a machinist but a wannabe with no lathe, mill or surface grinder. Just a hacksaw, grinder, a file, a pair of eyes and common sense. Have you ever encounter parts where at the maximum distance from the Chuck jaws was less run out that at the jaws.

[@KeithFenner]

Yes, and I did, I was only comparing the parted surface not using it as a reference! ;{)---

[@KeithFenner]

No, now the original one I had, which was traded without permission, my X brother-in-law, a long time ago, had a name on it! Dam if I can remember!

[@RandallMoore1955]

Keith, My son just came up stairs and said dad you work all day on oilfield engines only to come up and watch some one else work, I said iam learning from keith, Like you learn from me i hope. lol,

[@johnflynn5242]

Keith. Do you ever use soft machinable jaws to hold your work?

[@KeithFenner]

I have heard of them but have no hands on with that machine! ;{)---

[@KeithFenner]

You will! It just takes experience! ;{)---

[@ArtemiaSalina]

The high speed laughing sounds like Bart Simpson!

[@Teunbaartman1]

Hi Keath, another newbie question. Internet machinists are always preaching that you have to put your indicator on center when measuring concentricity. I don't see you do that. I trust you are right because youre projects are always on the money. Elaborate please kind regards, Teun

[@newandoldtech5634]

4 chuck competition practice run. 1:00 to 2:03. About a minute. Between telling what you are doing and fetching things to measure with. Rip A-bom a new 4 chuck hole.

[@Justinofalltrades1]

hey keith, have you ever heard of a Charles A Mann Lathe? im looking at one on craigslist. are they any good?

[@TFB82]

Couldn't you have stuck an indicator in the bore? Three indicators vs the parted face would have been great.

[@KeithFenner]

Thanks for adding your feed! ;{)---

[@hdxer8825]

These are certainly very nice and educational videos, but here I am talking too much! Because I do not even half understand, bring me videos nothing .... Learning by doing is better for me! Nevertheless, it is very nice to make such effort and these videos! Thanks

[@Teunbaartman1]

Hi Little Man, at least I have got your name WRIGHT! ;-)

[@HWPcville]

Do they make a 4 jaw chuck that is self centering? I know individual jaw adjustment is preferable at times however.

[@DarkPrivateer]

I am curious as to what material that cutting tool is that you're using to bore out that part.

[@101numlock]

Wish I could set up a four jaw that fast ,

[@gigabytex64]

I don't know if you can answer this question but at 13 min mark I paused the video and was looking at the lathe and could name the cross feed dial and the parts associated with the feed but at the bottom edge of the screen there is a feed opposite to where you stand and it has two vertical pegs to adjust the dial but I don't know what it would be used for especially since it's on the opposite side of the lathe, is it for mounting your cutter to and maybe doing a rotational cut.

[@KeithFenner]

That is my tracer attachment controls, watch my video Trace It and a few others to see it in action. ;{)-----

[@gigabytex64]

Keith Fenner A very handy attachment to have allowing precise replication at very little time cost allowing you to keep job costs down on labor plus it would help reduce errors. I am enjoying going through all your videos I have found them both educational and exciting, you seem to be lucky in a sense that the variety keeps you both on your toes plus gives a challenge to each project.

[@KeithFenner]

Someone may of made one at one time, but if they had and are not used today then you can figure it, wasn't as practical, as the three jaw. ;{)---

[@KeithFenner]

I wish, voice translation was world wide also! ;{)------

[@Mr1982shawn]

Please tell me there is a DRO on that lathe, im going to be embarassed if your turning that fast to a shoulder without one!

[@johnflynn5242]

But you can hold concentricity with out marring your part.

[@Bowtie41]

Me too

[@theresethomas5833]

je voudrais les videos en français

[@TheBingo1951]

ma un calibro da interni , ?????

[@futten3230]

freakin ouch man i hate chatter

[@trespire]

Lol 6:29.

[@benttt12]

I can buy new rims for around $100US, How much did this guy pay you to fix this rim Lol

[@benttt12]

Width and design are the only differences. If You know how a cast rim is made, Same process Motorcycle/Automotive. Mint condition used rims are $100USD every day of the week if you have more then a peanut for a brain

[@benttt12]

***** Stated they are ZX11 rims for a drag bike, See how many years Zx11 were made and get back to me on if they are rare based on your research... This is not a 1948 Triumph magnesium spoked rim. Clown

[@benttt12]

***** Know a lot more then you clearly

[@TheBingo1951]

perchè non usi le guide tornire ????? , molto meglio

[@CllAslnr]

Ne çok konuşuyorsun be arkadaş...:)