Part 4: Grinding the jaws on a Pratt Burnerd 3 jaw chuck. Refurbishing a stuffed 3 jaw chuck back to serviceable condition. Including treating/converting surface rust with citric acid. And making new replacement stickers.
Пікірлер: 65
@stevemurrey41226 жыл бұрын
Geoffrey - another kiwi ML7 owner here. I just followed your jaw grinding process on my very old Burnerd 3 jaw. Mine was quite a bit worse than yours, so I had to take a fair amount off, but now runout is down to virtually nothing. I used a Dremel with a toolpost holder attachment which allowed me to use accuracy of the lathe during the whole process. Thanks very much for the videos. Love the humour.
@pizzapig973 ай бұрын
I’m re watching this years later and still hits the same.
@michaelpurcell898411 ай бұрын
I love how your using the lath your fixing to fix it
@pedrocavaleiro36887 жыл бұрын
At this rate I'll be over all your videos by tonight. Please upload 10 more videos by tomorrow. Thanks for sharing!
@GeoffreyCroker7 жыл бұрын
Thanks Pedro. I wish I could work that fast.
@brunogx76 жыл бұрын
Thank you for the trick, Geoffrey. I applied the same process today with success on my both Pratt Burnerd chucks.
@tattoos19885 жыл бұрын
Thanks for appealing to smaller lathe owners I’m looking into getting a myford and this will help restore it great video and thanks for explaining things god bless
@richkellow15357 жыл бұрын
Nice one Geoff, I do so love to see a restoration project when done properly, I cannot wait for the next video, great quality too.....10/10.
@GeoffreyCroker7 жыл бұрын
Thanks Rich
@danielfogli17604 жыл бұрын
Aha! The transition from "silent protagonist" begins 😉
@davidkerr40233 жыл бұрын
Your a clever bugger Geoff..love your videos
@bikerides89077 жыл бұрын
What an excellent and helpful series of videos! Thanks
@martymorse89677 жыл бұрын
Thanks! Really like the discussion as to what you are doing and why. It really helps a newbie! Cheers!
@k.ekkonen46885 жыл бұрын
This is beyond awesome! Just starting a career in micromechanics and watchmaking. I'm looking at Schaublin lathes for the future. Maby do a 102 next? Cheers!
@ShevillMathers7 жыл бұрын
Very neat chuck refurbish, nice touch with the label.😃
@matthewchapman8967 жыл бұрын
Nice work, yet again. Thanks.
@GeoffreyCroker7 жыл бұрын
Cheers
@colinmiles10522 жыл бұрын
Cracking job!
@Reparaturkanal6 жыл бұрын
Citric acid only works properly when it's warm. It still works at room temp, but try warm, you'll see the difference in how well it could work.
@johnstrange67997 жыл бұрын
Very nice. I'd like to give my little chuck a once over at some point.
@GeoffreyCroker7 жыл бұрын
Thanks John
@botesmj16 жыл бұрын
Nice one.. I'm a bit late to the party having just bought an old MK7 in need of a restore. Looking forward to watch the rest of your videos. Will reach out if I need of advice if you don't mind, especially where you had your bed skimmed in New Zealand.
@Rolingmetal7 жыл бұрын
Good idea gluing the chuck jaws.
@Getbent977 жыл бұрын
Just a bit of advice for next time, when trying to grind the jaws down the best method (in my opinion) is to get yourself a ring that you know is circle, something as circular as you can find. Then use the inner diameter jaws or the outer steps in other words to clamp it as tightly as you can. That way you can be certain that there is no backlash when grinding at the jaws, it'll also help to keep them stable and stop them from flexing, giving you a better finish and hopefully more accurate surfaces on the jaws to clamp items with. Just something my machining teacher showed me, I'm sure there are a million other ways to do this of course. Nice work though!
@varjagg6 жыл бұрын
That's the wrong way to do it, as the forces clamping the outer ring are opposite to "normal" workholding. You can drill and pin the jaws ends to clamp a ring "in" though. The clamping force has to be the same direction as normal workholding force for the surface you grind.
@dickmick55175 жыл бұрын
@@varjagg You are forgetting that it worked! Function over theory.
@varjagg5 жыл бұрын
@@dickmick5517 There are countless ways to do a job wrong for sure.
@pravgeusau7 жыл бұрын
Nice attention to detail!
@jeffbluejets26265 жыл бұрын
Finished a 1950"s ML7 rebuild here a few months ago. Only need to add the Myford Headstock guard label. Have a copy off Google (of sorts) but just wondered what was the program you used for your label?
@machiningbasics17297 жыл бұрын
Good idea glueing the jaws will be a great lathe when it's finishedy !
@GeoffreyCroker7 жыл бұрын
Thanks, I'm hoping it turns out OK.
@machiningbasics17297 жыл бұрын
Geoffrey Croker on another note as an ml7 owner if you need any parts or advice don't be afraid to ask !
@michor107 жыл бұрын
Wow, that was amazing and quite scary to watch. Yikes!
@brianprice20362 жыл бұрын
Geoff, at 7:56 in the video, you are working on graphics. Did you draw over the logo in a vector program, or is that something that scans it? What drawing program are you using? Thanks, and love your videos.
@daviddouglas42003 жыл бұрын
Would question who told you to measure things while " on the move " -- can cause wear/damage to the measuring gear jaws Ect.
@eloyworkshop5416 жыл бұрын
Un trabajo espectacular!!!!
@bobwallace41924 жыл бұрын
Hello Geoffrey, did I see you use a Loctite product to keep some tension on those three jaws, prior to grinding. Bob
@Tasteslikepetrol6 жыл бұрын
Hey Geoffrey, out of curiosity, if you don't mind me asking, what is your background? You have good skills in machining, mechanical drawing, design and automotive.
@GeoffreyCroker6 жыл бұрын
draughtsman
@Ludovicotechniq6 жыл бұрын
My english is bad. Which program used at 7:57 ?
@juanrivero87 жыл бұрын
Looks to me (FWIW) that the jaws are worn,, but the chuck itself is fine. Any replacement jaws available in NZ?
@darrenb43247 жыл бұрын
What sort of buffing wheel was that? Didn't look like a polisher....
@GeoffreyCroker7 жыл бұрын
It's a scotch bright wheel.
@darrenb43247 жыл бұрын
Thanks
@Pultzsen5 жыл бұрын
What kind of degreaser do you have in that sprayer of yours?
@jimmycrawford29774 жыл бұрын
hey Geoffrey, where did you get the citric acid from? cheers from Hamilton
@GeoffreyCroker4 жыл бұрын
Bin Inn
@grieveswoodturningleiceste73886 жыл бұрын
What side thread is the chuck
@fivestander7 жыл бұрын
Fantastic job! One question: what software do you use to edit the photos of the stickers? How did you pull what would become the sticker off the original image? Many thanks!! Love these videos!
@GeoffreyCroker7 жыл бұрын
The software was Archicad. No reason why, it's just what I use for work. I drew over a photo. Cheers.
@davesalzer32205 жыл бұрын
Always be knowling
@ivomatthe77167 жыл бұрын
Very nice Geoffrey, with what software did you reproduced the sticker?
@GeoffreyCroker7 жыл бұрын
A program called Archicad. Only because I happen to have it for work.
@omarcid69457 жыл бұрын
megusta y ustede benden platos de 4 pulgadas y cuanto es el precio me gustaria con prar uno si es pocible gracias
@jiffiboy4 жыл бұрын
Can you tell me why the jaws on my Burnerd model 30 chuck won’t reverse?
@GeoffreyCroker4 жыл бұрын
You use reverse jaws
@jiffiboy4 жыл бұрын
Geoffrey Croker does that mean I have to buy another set of jaws
@robstirling31737 жыл бұрын
SHINY HAMMER!
@GeoffreyCroker7 жыл бұрын
Haha yeah. I have a rusty crap hammer for most whacking but try to keep one nice clean one.
@fasousa47987 жыл бұрын
updates for a part 5?
@GeoffreyCroker7 жыл бұрын
Should be within a week.
@fasousa47987 жыл бұрын
Thanks Geoffrey
@ssgee16 жыл бұрын
Hi Geoffrey I had just listened to the fools with tools post cast and Hand Tool Rescue gave you a shout out. I to have a ML7 that needs work and your video's will be a great help. Are you on Instagram I am as @homegrownnzlife us kiwi makers have to make the community bigger here in New Zealand
@omarcid69457 жыл бұрын
megusta y ustede benden platos de 4 pulgadas y cuanto es el precio me gustaria con prar uno si es pocible gracias