Mini Lathe 4” 4Jaw Modification

[old_toolmaker]

I modified my 4” 4 jaw chuck for my mini lathe. I was able to eliminate the adapter plate and machine out the back end of the chuck to allow direct mounting of the chuck. I added four new M6 mounting studs to fit the the spindle flange 4 hole mounting pattern. The overall chuck stack up thickness was reduced from 2-3/4” to 1-7/8”. The job went very well and I encountered no difficulty. The weight was reduced from 8.5 pounds to 6 pounds.[IMG]google drive[/IMG]Attachment 39093

[DIYSwede]

Nice work, getting rid of rotating mass and a good thing to be able to use all the bed length you can.
A pic (or link to another HMT post?) of your cross slide (Unimat?) tailstock arrangement
as glimpsed in lower right corner of your last pic would be much appreciated.

Keep up the good work and ATB

Johan

[old_toolmaker]

DYI Swede,
Thank you for your nice comments!
I had some issues with posting the pictures. I will try to get a few more sometime today.

[old_toolmaker]

The issue I have is with the size of the image file. I am going to use an app to reduce the size in Mb to under 2 Mb.
I am looking for a good app.

[bruce.desertrat]

The issue I have is with the size of the image file. I am going to use an app to reduce the size in Mb to under 2 Mb.
I am looking for a good app.

A decent online tool is here Simple Image Resizer, resize online images without losing quality

Windows 10 Photos app does this easily and well: https://www.groovypost.com/howto/use...resize-images/

Also Irfanview for just about any version of Windows lets you set the desired file size. https://www.irfanview.com

[old_toolmaker]

Thanks Bruce!

[metric_taper]

Dick, I use a free download viewer, that lets you resize the photo, and then save it to what ever directory you want.
https://www.irfanview.com/
There's a choice of 32 or 64 bit programs. It will install, then any jpg you select will be opened. Then if you click on the top tool bar "Image", "Resize/Resample" you can select the downsample. Then save as to where you want it kept, I usually write to same directory, and change the name, so I don't overwrite the original.

[old_toolmaker]

metric_taper,

Thanks for the tip.
I found I had Adobe Photoshop on my computer. It has been quite a while since I last used it and had forgotten about it.

[old_toolmaker]

Thanks for the help with resizing photos.
I have attached 2 new photos. I hope this shows the before and after dimensions.

[marksbug]

when I put the 6" chuck in place of the 4" on my 9x20 lathe I used the hardened head stock center checker with tail stock supporting the other end (mt5 I think) tightened the chuck to it backwards( jaws to the head stock side) so i could machine the recess& true it up since it was a china chuck...( totaly disassembled chuck first deburred and cleaned real good reassembled for totaly smooth movement( the china greese is used greese/oil/lube in all thier out bound equipment and is full of ****, so it must be disassembled and cleaned then refilled with proper lube if you want it to last) so i trued it up on both planes.then installed the backing plate to the lathe and trued it up and sized the resess for it also. much much better runout readings than the normal china stuff. I wish I had it in me to put a larger spindal in it...but i would be better served selling my 2 small lathes and getting 1, 12x36 0r 13x36.lathe....I probably have 3 hours run time on this one in 5 years and mostly resizing pvc pipe fittings.... yes Im a financial wizzard....NOT. it's just getting harder to do things I want to do.