Excellent! I've learned a lot from this video! Thank you both, gentlemen!
@mike_jay2 күн бұрын
So all these years I’ve be taking advice from a beginner, rolls Royce all be it of 10 years.
@mechaform3 күн бұрын
Thanks for discussing the rationale and considerations affecting project choice.
@darrenmcclelland81179 күн бұрын
Never seen an expanding mandrel, seems a very useful piece of kit👍
@petermarsh499311 күн бұрын
Mr Crispin. Thanks for your interesting video. In my “ideal” workshop equipment list I have included a surface grinder. It looks more difficult than I had imagined but nevertheless a useful machine once set up. To take out the movement of your machine I see the base has holes through which you could put bolts to fix it firmly to the floor. I can’t see whether your floor is concrete or timber sheet but if concrete would be ideal. Cheers.
@user-wb7lv7qj2t12 күн бұрын
I’m suffering from what authors call Writers Block syndrome because I’ve been undergoing cancer treatment and I have chronic pancreatitis,no sympathy PLEASE NOT LOOKING FOR THAT.However have you or your subscribers ever had my problem of not being able to get back at THE LATHE so to speak.I was never away from doing one project to the next,but now I can’t get MOTIVATED WHATSOEVER.I still love the idea and love watching you but IM TOTALLY BLOCKED ANY SUGGESTIONS.
@user-Sucio12 күн бұрын
Why would you grind it and not cut it on the lathe, or is that dumb?
@MrCrispinEnterprises11 күн бұрын
The jaws are hardened steel so they don't really cut by means of turning.
@robw5315 күн бұрын
How’s the video coming along? 😋
@tomfrost59016 күн бұрын
If anyone wants a head start I have 2 chassis and wheel sets for an 0-6-0 pannier tank which my father started. Just looking for a good home.
@624Dudley17 күн бұрын
Hello Crispin, now in August 2024 I’m reviewing this grinding series. An upcoming task requires that I wake up my slumbering Dumore 44 - never used since arriving at my shop - and prepare to OD grind. It’ll need some fiddling to make it fit, but then these are the challenges that keep us amused. Thank you for posting! 👍👍 EDIT - My grinder looks just like yours, in particular it has a separable power cord with no provision for grounding. That suggests it’s quite old. My serial number is B 4133. According to the factory, this means it was made in 1941! 😮
@mattheweskender778118 күн бұрын
Bow making course is looks like fun class
@hullygully-359922 күн бұрын
Hi Mr Crispin. I wonder if I could ask some grinding advice. I’ve a chevalier manual surface grinder and I’ve been following SteveBarton at SolidRock using a Radiac open structure ruby wheel .. which works very well and runs cool without coolant (Radiac RA46-H800-VOS ruby wheel) BUT… impossible to buy. We these wheels in the UK … any advice as to which open structure wheels you may prefer for surface work with only a mist or no coolant. Thanks anyhow Mike … Beverley, E.Yorks
@viorel22cr22 күн бұрын
How are you this days MrCrispin?
@MrCrispinEnterprises22 күн бұрын
All ok thanks. It's been one thing after another through the spring and summer but gearing up for more machining work next.
@robertpeters943829 күн бұрын
Clever solution to clamp jaws for grinding.
@jacknoble1808Ай бұрын
I watched your presentation with great interest because I have a chuck that needs to be trued and I intended to use your very clever and well thought out method. I anticipated that your method should yield near perfect results so I was very disappointed to see several thousanths of runout in the finished part. My chuck is nearly that good now so I was looking for a method that would give better results. I think that the source of the error can probably be attributed to the clearance in the chuck between the outside diameter of the scroll and the mating bore in the chuck body. When torque is applied to the chuck key it creates the desired torque to rotate the scroll to move the chuck jaws but it also creates an undesirable force pushing the scroll sideways against the chuck body bore. Since it is the scroll that controls the position of the jaws this movement will drive them off center. Perhaps if you had used only one of the drive points to tighten the chuck for grinding and used only the same one to tighten the chuck for checking the runout your results may have been better. I will try that on mine and put tape over the other two drive pinions.
@MrCrispinEnterprises29 күн бұрын
Ok yes, try that on your chuck and report back! I've head somebody say they only use one pinion and they also use a torque wrench to improve consistency.
@billmacfarlane4083Ай бұрын
I know I'm late to the party here, but, using your (brilliant!) dolly arrangement would a progressive tightening of the pinions, then grinding help towards the reduction of a "favourite"?
@grayman999Ай бұрын
Derwent Valley Light Railway even ? 😉
@user-et5cu5vf3lАй бұрын
チャック外径を芯出ししてから、研磨しましょう♪ 機械に取り付けたら、始めにチャックの芯だしです。
@mechaformАй бұрын
An excellent addition to the toolbox.
@scottsluder8037Ай бұрын
Long time viewer, I would love to see all the detail and machining, I like your thought processes.
@whatislife5295Ай бұрын
Hi, what is the name of the textbook? Right now I'm very new to this and my teacher refuses to teach any theory and just start of right away in the workshop. Which is very difficult for me
@holry7778Ай бұрын
Excited to see you back on the Loco!!!
@johansoderberg9579Ай бұрын
Those shaft bearing boxes could maybe be tin plated to get a more suitable friction pair.
@bigbattenbergАй бұрын
Nice to see the same solution I distilled from a YT comment somewhere, the only difference being that I have a part laser cut instead of a number of parts to do the internal grinding.
@ValMartinIrelandАй бұрын
Well explained. I have to do that on my Shenwai 900b lathe. The hook plan was my solution too. Why does the grub screw not interfere with the dowel peg?
@user-xm8ud3nn6m2 ай бұрын
Tienes planos del pistón modificado
@harry85062 ай бұрын
What a treasure.
@tobyw95732 ай бұрын
Great show Crispy! Do you suppose the variability in the concentricity may be due to side play in the scroll and its recess? It seems that the jaws would move in conjunction with any side play in the scroll. I guess you could measure scroll wear with a dial indicator - within the limits of travel, at least. Do you suppose the spare jaws were an oversize set designed to be fitted to a worn chuck? Thanks!
@MrCrispinEnterprises2 ай бұрын
I think side to side play is definitely a major cause, along with un-even wearing of the scroll if different locations. I don't think they were deliberately oversized I expect it is just a case of manufacturing tolerances stacking up. Cheers.
@joepie2212 ай бұрын
The power to keep all those machines running must have been massive, the machines - impressive, but 180 points on one dart round...Priceless.
@MrCrispinEnterprises2 ай бұрын
Yes it's frightening. Not to mention the speed and logistics required for getting everything in and out in time for the other shows using the same floor space.
@Hereford16422 ай бұрын
I think it is becoming clear that the idea that there is a project in hand is merely a rather weak excuse to simply play with interesting machines. I have come to realise this about myself and I think it is true of nearly everyone with a few notable exceptions who actually do produce a stream of actual results such as Gerald Wingrove who, I think, did not actually have a garage full of such machinery.
@MrCrispinEnterprises2 ай бұрын
Yes good point!
@Gurnhillsgarage2 ай бұрын
Nice work there, were you worried about the chuck coming loose running in reverse or were the cutting forces not enough to worry about. Cheers for the great educational videos.
@MrCrispinEnterprises2 ай бұрын
Had the cutting forces been larger then yes I would definitely be concerned but in this case they were very light. A problem along these lines could however, have been caused in the event of a mishap or accidental heavy cut.
@vikingsofvintageaudio74702 ай бұрын
Fantastic video!
@gndinkins2 ай бұрын
You sir are missing a slight point that you might check. On your chuck there is a large round point on the face of the chuck. You should always use that point to tighten the chuck. It will make a difference on runout.
@MrCrispinEnterprises2 ай бұрын
I can always rely on you to spot the missing points.
@bobjimenez44642 ай бұрын
nice crosshatch finish on the face....it looks good.
@jaygee92492 ай бұрын
How come the the little guy appentice didn't get to say what he thought?
@MrCrispinEnterprises2 ай бұрын
Because I'm an overbearing tyrant!
@ArthurJones-rr8ej2 ай бұрын
3 Jaw scroll chucks with hardened jaws are not meant for the level of accuracy your trying to attain. You need to fit soft jaws then bore to the diameter your going to hold.
@PhaseConverterampV2 ай бұрын
Brits have been using those since the 40’s . I have books with them being used. Nothing new, still a good idea.
@MrCrispinEnterprises2 ай бұрын
Interesting. What do they call them in the books?
@bejay692 ай бұрын
No tailstock support?
@MrCrispinEnterprises2 ай бұрын
Are you asking me?
@webtoedman3 ай бұрын
😊 An excellent explanation, good visuals.
@user-xm8ud3nn6m3 ай бұрын
Hola MrCrispin donde podría encontrar planos de la locomotora Gracias
@benjones22063 ай бұрын
Very informative, thank you.
@richardmills54503 ай бұрын
Just wondered if you did any head stock alignment before grinding? Does regrinding eliminate any misalignment? Cheers
@MrCrispinEnterprises2 ай бұрын
Hi, no I didn't do that. I had aligned the grinding spindle with the lathe spindles centre of rotation so for the flat face I guess the that's the important bit. You could argue that any error in headstock alignment would give an error in the taper angle produced. Cheers.
@ericsandberg31673 ай бұрын
Mr. Crispin....you wouldn't happen to have a set of plans/prints on that lapping machine that you would be willing to share with a fellow machinists......???
@MrCrispinEnterprises2 ай бұрын
Have a look on Stefan Gotteswinters Chanel. I think he documented the original concept in some detail.
@marceloiannini81993 ай бұрын
Why do I have a lathe and a milling machine? My answer is that the lathe make parts for the milling and the mill makes parts for the lathe. 🤣 Drives the wife crazy!
@davemorrow8083 ай бұрын
Mr Crispin we shook hands a few months back at DRPC1999, I would like to pick you brains about where i could get a square threading die, single point cutting tool (.800 Pitch), i'm chasing someone in the states but was wondering if you knew of someone local - midlands/uk? - David M
@melgross3 ай бұрын
That problem with the pull off spring tension is why I use push off for small heads with small screws with my Geometric heads. Just remember that when using 5-C collets that you must have the exact size collet for whatever is going into it. ER collets allow some compression to the next smaller size as the way they’re made allows for parallel shrinking of the inside diameter. But 5-C collets close the inner diameter at an angle if smaller work is put into it, causing some wobble in that work. If you over tension the collet to get that wobble out, or to try to get it tight enough, eventually you will damage the collet and deform it permanently.
@MrCrispinEnterprises3 ай бұрын
Yes those are all good points
@Te4mUp3 ай бұрын
Mr. Crispin I have 3 questions for you if you don't mind. 1: Do Rolls Royce machinists actually wear those long sleeve jackets while machining? I can't help but feel like that's unsafe. I drove a needle file through my hand a few years ago deburring a part close to a 3 jaw chuck. I was doing something dumb but I also knew I was doing something dumb. So I was "paying attention". The only problem was I was paying attention to the center of the file that was demurring, not the tip of the file that was right next to the spinning jaws.... I feel like wearing that coat you're ALWAYS doing something dangerous. You might be paying attention to your hands, but are you paying attention to your sleeves? I was taught to never wear long sleeves especially when running a lathe. I'm sure you've seen the "Russian lathe incident". It's only a matter of time before part of your coat catches on something, no? I'm sure you're paying attention 99.9% of the time, but it's the .1% of the time that's important. I was very lucky. My hand is "fine" but every now and then it hurts. Maybe in 30 years it'll hurt more. 2: On a lighter note, any chance you're related to some Leafes in New Hampshire? 3: I live[d] in Uxbridge, MA. Ever been to Uxbridge, UK?
@MrCrispinEnterprises3 ай бұрын
Hi, not just Rolls Royce but actually all UK machinists have long sleeves typically. Either in the form of overalls or over coats. I can see where your coming from but it doesn't appear to be a problem. If you were to go to a trade school here at the moment you would have long sleeve overalls but you would not be expected to buy your arms anywhere near the chuck. No filing and no emery cloth ect. Long sleeves also stop you send from getting covered in hot swarf and coolant. As for the other two questions I'm afraid it's a no for both but good comment!
@madguernseyboy3 ай бұрын
Can you link us the maker of you colin vice stop?
@MrCrispinEnterprises3 ай бұрын
I've just had a look and I can't seem to find his channel anymore. He is called Colin Chipett from memory.
@madguernseyboy3 ай бұрын
expanding mandrel is an expensive item. how would you suggest doing it without one? 4 jaw chuck and clock the bore square?
@MrCrispinEnterprises3 ай бұрын
Yes that sounds sensible and is probably what i'd do.