ER 40 Collet Chuck Runout

weejax said:
that is what I have been measuring--the taper.
Click to expand...
Can you show a picture of how you are measuring the taper? The R8 section is locked down, correct? And the ER chuck is empty, without the nut? And you are simply using a DTI to measure TIR of the ER taper? And you are rotating the spindle by hand? Sorry for the elementary questions, but it's important to unravel the puzzle.
 
WobblyHand said:
Can you show a picture of how you are measuring the taper? The R8 section is locked down, correct? And the ER chuck is empty, without the nut? And you are simply using a DTI to measure TIR of the ER taper? And you are rotating the spindle by hand? Sorry for the elementary questions, but it's important to unravel the puzzle.
Click to expand...
yes to everything above
 
weejax said:
I made some videos for the glacern guys--they ended up giving me a refund

this is one of my R8 collets w and end mill, just for reference

r8 1/2 em.mp4

drive.google.com drive.google.com

this is the glacern ER40

glacern er40.mp4

drive.google.com drive.google.com

and with my drill chuck and an end mill

drill chuck.mp4

drive.google.com drive.google.com

and finally the spindle itself

mill spindle.mp4

drive.google.com drive.google.com
Click to expand...
FYI, your link (at least for the Glacern ER40) require your approval. They are not open links. If that's what you intended, that's fine.
 
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