Re-Grinding Chuck Backplates 

"Taken the last .5thou off quite a few times now" 😂

"I have taken the last half a thou off quite a few times now...." So.... that qualifies as a "bunch", right? 😁 I've really enjoyed your very pragmatic explanations and procedures. Getting the job done without a lot of esoteric excess. Nicely done Sir!

“To a torque of approximately that!” 👍😀 I approve 👏👏

Excellent Job and very informative as usual, no need for a prize Mr C, couldn't resist putting that caption and hope it didn't offend anyone

You have almost convinced me that I could tackle a job like this....but I don't have a grinder so I am saved from myself. Well done and I learned a bunch of new stuff. Thanks.

Like going back to engineering classes. I was quite astonished at how the sparks flew after redressing the wheel. Going back to the grind before redressing made it obvious that something wasn't right. I very much appreciate the thorough discussion of the grinding parameters. Thanks as always for this valuable video.

Glad to see Jefferson made the cut. A fine edition to the channel.

Yes indeed. This was very interesting.

This is fascinating work, Mr. Crispin - thanks for the clear and rational explanation. 👍

Having worked universal grinding machines & DSG lathes in machine tool industry in Coventry, it's exactly how I would have done it, excellent video again. PS very good cross cut finish, shows wheel head bang on in that plain!

Fascinating Chrispin! You have made a hard to understand concept eminently understandable! Your idea for the way you were going to go about it, and the reasoning behind it was spot on. The freshly ground surfaces will last the rest of your life because you won't abuse the machine when in use, and of course it won't be in an industrial production environment.

Thank you for sharing this, I've always feared working on my Camlock mounts, as they have very strict tolerances!

Oddly I did not have you down as the sort of chap who got into the groove... Well done and thanks for the information.

Nice job.

The time spent truing things up now will pay big dividends in the long run not fighting stacked tolerances that are way off.

So glad to hear microns used as opposed to the usual thou. Thanks.

Most interesting indeed sir and as usual it’s a pleasure to keep to condiments ready whilst you delight the viewers with what is simply not my forte.. enjoyed the video however.. may I remind you that the sherry is getting low Sir . Regards Jefferson

When I saw you fit the gage up with zero clearance, I thought you had done this wrong. Thank you for showing how to do this correctly, lots of mis-information out there on D1 chuck fit-up. I fit my 3-jaw chuck to my lathe, but just single point cut it rather than grinding it. These cuts are super light, and can be done with very high precision with a HSS tool. Carbide has too much tool pressure to do this easily.

After finding the best alignment I put witness marks on my D1-4 spindle and on the chuck so it always went on in the same alignment. I was able to keep the chuck runout equal to the spindle runout of about 3 tenths.

Always an education Mr. C. Excellent as usual. Dean.

fantastic video - thank you!

Thank you mr Crispin .. that was very informative .. much appreciated ( beginner) turbomarlin

The winning caption for the picture had me laughing pretty good.

Good stuff.

Very interesting old chap, pip pip and toodaloo, lol, great video Mr Cripin

Nice to see you back Mr. C. 👍

As with all of your videos I am always impressed with your high level of skill and craftsmanship .

Great video. Thanks!

This series is very useful. One of my lathes has a D1-5 spindle and some of the backplates fit well but a couple do not seat entirely. I foresee making a gauge so I can undertake the grinding.

Wow. Love it!

HA-! Love the ongoing variety in the hat toss intro-! Dont know if ya remember but I mentioned a long time ago the hat toss would make a great regular addition to your intro - dont know if my comment came into play at all but so glad ya kept it and made it even better & even made it your official logo of sorts, well done. That was a really sweet piece of precision grinding to achieve such a fine interference fit --- really a nice bit of accuracy and fit.

Hello from across the pond, I love the channel and in exchange I will forgive the tea tax forced upon my ancestors by your King.😃

Oh come on Crispin! All of those hammers on the wall in front of you and you are using the chuck key instead! 😂

Jolly good job Mr Crispin Jolly good 👍 I say you earned a pint 🍺 or two

Interesting yet again Mr Crispin, until the next, stay well.

Fun and playful video. I enjoy the technical contact even though I can’t play in that field.

Excellent idea using the 123 blocks to mount the face plate. Always look forward to your next video.

Nicely done. I thought, however, that you are supposed to tighten the cams in a 1-4-2-5-3-6 sequence. ???

Interesting video Mr Crispin.👍👍

On Precision Engineering: I once had a friend who was working on a Jaguar differential, I asked him what was the correct torque for the pinion bearing nut? He replied that he used the setting an old master craftsman gave him and that it had always worked reliably for him. The man told him the nut should be tightened "two grunts on the tommy" my friend demonstrated with his tommy bar: unh!, UNH! And he rotated the pinion twice and pronounced it complete! Take what lessons you will - LOL! The scientific explanation is that through experience, the experts judged where the tightness/preload was on the elastic modulus curve.

Hi I was wondering why you didn't rough out the plate with a tool bit first. Rich

Excellent tutorial

Good I liked the video ☹🇬🇧

Neat video as always, learned about taper fits and connected them to the interference fit in a new way. Mr Crispin are you looking for new ideas for your throwing hat intro? If so I have two that I can email.

Really enjoyed watching these grinding videos. These back plates look really big, do you have a particular job in mind for them? Good luck from Spain!!

8:06 Thought I heard a 'Click' there...

Great instruction, I would like to see how you make your plug gauge. Was it ground in or made on the lathe? Thanks again

"...As the faces come hard together, the female end is stretched over the male." I guess that is "family friendly" in that families have to start somewhere, and it's usually there.

Hmm.... went to contribute to the Mr Crispin sherry fund, and the PayPal donate button on the website doesn't want to work - says "Paypal Error: All sellers restricted."... worked after the last video... Can you fix it, or is it my end? Patreon is easier, but I guess they charge a hefty commission.. Great video!

If you get a moment, can you present your technique and setup for dressing the wheels...thanks.

voce se parece muito com o Christopher Reeve (super man)

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

are you running the compound screw by hand or with a drill ?

Mr. Crispin, I’ve enjoyed your series here on grinding, so much so that I am in the process of acquiring the same TPG! I would like to know if you have a source that I can look into for the grinding wheel that you’ve used for face grinding in this episode. Thank you!

Do you plan a video on making the plug gauge please. Is that ground on the OD and taper as well ?

Thanks for sharing 🦘

Dear MrCrispin, Regarding your opening pastoral scene by the lake: I have heard the expression "throwing (ones) hat in the ring" meaning "to announce that one is going to be competing with others, especially in a political election", but I have never seen a man actually throw his hat into a tree! Do you have any clarification at this time?

Ah MrCrispin, i see you subscribe to the belief that anything can be a hammer, had a motorcycle designed by Rolls Royce, MK3 Norton Commando. Bloody rubbsh

Your not an upper-class twit, you a competent Rolls Royce engineer, your videos are clear and well presented, you don't need to pretend your not a working class lad! All the best, Matthew

Say "Cheerio!" to Jefferson for us.

👊👊👊 Really nice video about short tapers and dual contact. Horses in grinder was almost fully loaded with so big diameter grind wheel, but done job still.👌

my question is why===being more accurate than the manufacturer---I have my doubts

Really disappointed. I expected Jefferson to come in with a small gong and announce dinner. Standards are slipping!

Hii i bought a graziano sag 14 which has a D1-5 Spindel Nose which is a bit rough maybe i will Start the same Project but i don't have a toolpost grinder now how many RPM do these stones need i got a cheap 500W up to 10000rpm spindel with a ER 11 collet is this to fast and to weak? I also have a straight ER25 shaft and some Roller bearings i could make a toolpost grinder out of it.

One thinks Jefferson is a Freemason just back from the lodge?

Thanks for sharing.

Awesome, looking forward to watching this one. And I’m first for the third time now 😊

Channel Four is family friendly? When I was living in the UK it was far from that 😄

Tightenough ft-lb

"I have taken the last half a thou off quite a few times now...." It's his own fault. Should have tightened the grinding wheel up to "click"nM.

Damask lathe bed protection - de rigueur

شكرن ممكن ترجمه الفيديوات الي اللغه العربيه من العراق

Rotate round, now mr. Crispin, that is some bad English. You begin to sound like Keith Rucker...

It would be great if you dropped the volume of your machine tools when editing the video, so I don't have to adjust my volume up to hear your voice and down again for the loud machine. Your mic and my speakers must do well at the frequency of your grinding machine.

I dearly hope you didn't misgender those tapers. Did you ask their pronouns first?

Why did you have to throw your hat before you took that coat off the milling machine? Are you incapable of carrying two articles of clothing at the same time? It can't be physical limitation, they're not that heavy. Is it phycological?

👍From Italy