That is awesome! Thanks

I saw it too because it was very visible!

Yep. Good observation

Haha, you got it

I always aim for a good fit but I think the treads are self centering. This chuck was about .003 over but I'm usually about .001 over. Scott Logan said the same about a thread mount. That doesn't make him right but I do respect his opinion. I've had problems with the transfer screws but I suspect it was my drill press quill. I've since adjusted the quill but its not perfect.

Thats great, maybe I should have posted a procedure to print.

I've had a chance to use it a few times and I agree, I need to fix it. I think I'll slide the chuck body off center kind of like a set through chuck.

I will likely do the same but I also want to make sure its off the same at all diameters.

I was going to do as you suggested but after looking at the runout a little closer I realized the jaws were an issue. When clamping inward the runout high side lined up with number 3 jaw and when clamping outward it was 2. The the other jaws (external) were similar but the high jaw was a different number. Basically I didn't want to have to adjust the chuck every time I changed jaws so I ground (actually cut) the jaws level.

Thanks Harold!

You're very welcome, Thanks

You are correct. I new better and messed up. I'm guessing the carriage had enough drag to keep the lead screw backlash from being an issue.

Haha... I forgot about that, you are observant!

I was thinking about turning down the register a little and moving the chuck body off center. Another comment suggested removing the plastic chip guard over the scroll and inserting back plate into the chuck more. If I do this I might have room to install set screws to adjust to center

I'm thinking about tuning the ledge on the back plate to make it adjustable

Thanks!

Thanks

Thanks

Thanks!

Accurately measuring the hole position on the chuck was the hard part. Doable but prone to error.

If you take a centre distance hole measurement and divide by 0.86603 it gives you the pcd of the bolt hole circle. Hope that helps. Love your videos and greetings from Australia.

@@kevinsmith1976 The center distance is the part that make this difficult. I've made threaded bolts with a point or used a transfer bolt in the past to do this so its doable, just adds a step.

Yep... I've done that severa times. I need to make sure its similar at different diameters first but if it is, I need to do that

Thanks

Thanks for watching!

I've done the same with the transfer screw but I seem to have better luck with the indexer. Thanks

Thank you! 🤗

Darn good idea sir! Thanks

You bet, thanks for watching!

Thanks

That would work

Thanks

It always amazes me how much much of a mess it makes. But I agree.

Older chuck had a larger bore, these Chinese chucks do not. Irritating to use after you are used to the older chucks

Ha... I agree 100%. I've always pushed the limits within reason. I worked for a printing company most my life and there were some people that would rather live with a poorly running machine than to try making it better. The logic was that it was running and you might make it worse while attempting to fix it. As time passed we got updated machines that were much easier to run but the people that were afraid of change stayed on the old machine eagerly working the ass off to avoid change. The last 15 years before retiring I was doing an engineering job (without a degree) designing machine modifications in problem areas. It was a lot of headaches but also fun.

I think a collet chuck is more difficult to get right.Thanks

Thanks

I'm guessing it would work find but it would also be less rigid I think

You are absolutely correct. I just messed up. I actually run it to the back side sometimes but the way I did it was wrong. The threads are pulling the carriage. It's amazing but it worked well. I guess the carriage has enough weight or resistance. Good catch!

Wow... Good catch, you are right. I just screwed up. Surprisingly it always works but there is a potencial for screwed up threads. The threads are trying to pull the carriage.

Thanks, yeah I might fix the jaws, I've done that before. However, I need to mark the low jaw and see if its consistent at several diameters before I do that.

Hello Dave, well in this case I'm going to have to disagree. All my chuck have steel back plate and have had for about 10 years. I've never had a single problem. Bison sells thread mount high strength steel plate as well. Steel is much stronger than cast and performs much better on a smaller threaded spindle. I've had threads break on cast back plates. Probably low quality plates but never the less, steel will never break.

Monday’s experts

@@normesmonde5332 Generally speaking Dave has some good advice and others have said the same about cast. Cast generally has a vibration absorbing quality and in some cases it might be a better choice. However, to me, this means the cast iron has to be compressible. Years ago I had a Shars 6 inch chuck and cast back plate on my Logan and it chattered bad. I put a 3 foot x 1.5" bar in the chuck and pushed down on the bar. The chuck actually moved away from the spindle register. I replaced both with steel back plates and the chatter got substantially better and the bar test was also much better. Both a 4 jaw and 3 jaw Shars 6" backing plate failed at the threads so this may be a quality issue more than cast vs steel ALTHOUGH Bison chucks confirmed that their steel back plate were stronger. One Shars plate failed at 7 month and the other at 1 yr. Shars would NOT stand behind them and I don't hesitate to throw them under the bus. I do not buy from Shars!

@@WinkysWorkshop It is my understanding that the backing plate should be of cast iron because when mounting and dismounting the chuck if anything should wear it would be the cast iron and not the spindle. Keep both well oiled with quality oil. Aaron from Canada

@@aarondean8299 yeah... I can see where a tight thread might be an issue but I'm not worried about wear at all. There is usually oil on the threads and I always make sure they are fairly clean. I really don't think there is a huge difference anyway. The spindle threads are hardened steel I'm sure.

I prefer steel over cast. It's stronger on a threaded spindle. I've had threads fail on two checks that were cast.