2017 POTD Thread Archive

So, indicating the back plate found a couple thous of run-out on the face, probably caused by not being super-careful the first time I mounted it. The circumference of the register was pretty much perfect. Refacing it got me to within one thou of run-out on the chuck's taper.

I did notice that the variation moved around a bit as I torqued the bolts. I'm going to get out the tenths indicator and a torque wrench to see if I can get in a bit closer.

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I had to come up with a way to bore out my new set of soft jaws for this repair job I have to run. I haven't used a set of soft jaws in probably 10 years, and longer for this larger chuck I have here. My brother wound up with the presetters we had at dad's shop. Some day I'll get them from him. So anyways I had to come up with something to work for now to preset the jaws on this sprung chuck to get me by for now.
What I did was take three pieces of flat bar and accurately spaced out holes at each end to bolt together as a triangle. Used the heads of the socket head cap screws as locator pins to locate into the counter bores of the soft jaws. I will say, it worked out perfectly. Last pictures is the setup of the part I have to ream out about .025" by 12-1/4" deep. Here's some pictures of what I did. Ken

Forgot to mention, the part is running within .0045" T.I.R. out at the end. Not too bad for a worn out 10" 3-jaw chuck.

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4gsr said:
I had to come up with a way to bore out my new set of soft jaws for this repair job I have to run. I haven't used a set of soft jaws in probably 10 years, and longer for this larger chuck I have here. My brother wound up with the presetters we had at dad's shop. Some day I'll get them from him. So anyways I had to come up with something to work for now to preset the jaws on this sprung chuck to get me by for now.
What I did was take three pieces of flat bar and accurately spaced out holes at each end to bolt together as a triangle. Used the heads of the socket head cap screws as locator pins to locate into the counter bores of the soft jaws. I will say, it worked out perfectly. Last pictures is the setup of the part I have to ream out about .025" by 12-1/4" deep. Here's some pictures of what I did. Ken

Forgot to mention, the part is running within .0045" T.I.R. out at the end. Not too bad for a worn out 10" 3-jaw chuck.
Click to expand...
That is pretty clever
 
pstemari said:
. Refacing it got me to within one thou of run-out on the chuck's taper.

I did notice that the variation moved around a bit as I torqued the bolts. I'm going to get out the tenths indicator and a torque wrench to see if I can get in a bit closer.
Click to expand...

Well, forgot the ticks on the indicator I was used were 0.0005", not 0.001", so it was only running a half thou out.

I got out the tenths indicator and carefully retorqued the mounting bolts to 25 ft lbs, and now it's down to a couple tenths of run-out.

I'm declaring victory

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4gsr said:
I had to come up with a way to bore out my new set of soft jaws for this repair job I have to run. I haven't used a set of soft jaws in probably 10 years, and longer for this larger chuck I have here. My brother wound up with the presetters we had at dad's shop. Some day I'll get them from him. So anyways I had to come up with something to work for now to preset the jaws on this sprung chuck to get me by for now.
What I did was take three pieces of flat bar and accurately spaced out holes at each end to bolt together as a triangle. Used the heads of the socket head cap screws as locator pins to locate into the counter bores of the soft jaws. I will say, it worked out perfectly. Last pictures is the setup of the part I have to ream out about .025" by 12-1/4" deep. Here's some pictures of what I did. Ken

Forgot to mention, the part is running within .0045" T.I.R. out at the end. Not too bad for a worn out 10" 3-jaw chuck.
Click to expand...
WELL PLAYED
 
IMG_1080.JPG Today I made a temporary flat belt out of a canvas strap, sewn together with elephant floss . Cobbled together a power cord for my new to me SB 16. Fired it up and the spindle wouldn't go. The rear spindle bearing is to tight will have to pull that apart clean and shim. I loosened it enuff to free the spindle and made my first chips with it. Aren't they cute!!!!
 
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