Very nice job. I'm working on fitting a backplate to a new chuck I bought. It will mount on a 3/4 x 16 spindle. I've got some expert help guiding me through the process and I am looking forward to success. Thank you for the video.
enots engineering : Be careful with that, I purchased a casting from what I thought was a reliable source and it was trash metal. I ended up buying a good quality cut off and building from my own measurements. Never rely on manufacturer provided dimensions ( not accurate enough).
Interesting video, as always. Given the amount of 'meat' on the boss of the original backplate, and given that you have a faceplate, could you not have bored out the register, pressed/loctited in a sleeve and then bored it to a proper dimension? Just a thought.
Your dial indicator attachment is ill-conceived. It puts a side load and bending stress on the indicator stem which will ruin a precision tool. Please take the time to remove the chicken poo weld spatter from the backplate. Even if it does not bother you, consider what the person who inherits it from you will think when they see it. You can save the old backplate by boring out the old register, shrink (or loctite) fitting a sleeve and then remachining the register diameter to the correct size. Have a look at one of Abom's recent videos where he did the same to a motor bell end. A good future project is a dummy spindle nose, a clone of your own (measure your own thread with wires), which can be used for test fits where it is undesirable to remove whatever is attached to the lathe spindle.
Looks nice ! 👍
Cool work
Very nice job. I'm working on fitting a backplate to a new chuck I bought. It will mount on a 3/4 x 16 spindle. I've got some expert help guiding me through the process and I am looking forward to success. Thank you for the video.
Thanks, I have the same problem. I think I bought the same backplate as you did
The thread should be fairly slack its the register that should locate the back plate, the thread is there to hold it in position only
Good job! About half way through I was thinking, might have been easier just to start off with a blank stock.
Hi Craig yes knowing now that the thread would need recutting I would just purchase the casting in future
enots engineering : Be careful with that, I purchased a casting from what I thought was a reliable source and it was trash metal. I ended up buying a good quality cut off and building from my own measurements. Never rely on manufacturer provided dimensions ( not accurate enough).
Overall, an interesting way to fit a backplate. Not sure if this is the one I would follow. Maybe in case of an emergency.....
Interesting video, as always. Given the amount of 'meat' on the boss of the original backplate, and given that you have a faceplate, could you not have bored out the register, pressed/loctited in a sleeve and then bored it to a proper dimension? Just a thought.
Hi Ian The problems with the old backplate are bore over size O.D under size by 0.005" and the bolt holes are over size.
are you sure you are usung a tenth indicator?
How can you get accurate radings of your dial indicator if it is on an angle to the face being measured?
Hi Todd I was just checking the bore run out approximately I could not get into the bore square due to the large od of the back plate
How did you get run-out if the back plate was turned on the lathe it is married with? Is the chuck the item with that much run-out?
Hi I assume the chuck has some run out in it
Your dial indicator attachment is ill-conceived. It puts a side load and bending stress on the indicator stem which will ruin a precision tool.
Please take the time to remove the chicken poo weld spatter from the backplate. Even if it does not bother you, consider what the person who inherits it from you will think when they see it.
You can save the old backplate by boring out the old register, shrink (or loctite) fitting a sleeve and then remachining the register diameter to the correct size. Have a look at one of Abom's recent videos where he did the same to a motor bell end.
A good future project is a dummy spindle nose, a clone of your own (measure your own thread with wires), which can be used for test fits where it is undesirable to remove whatever is attached to the lathe spindle.