On 13 Feb 2019 01:05:34 GMT, "DoN. Nichols"
wrote:

On 2019-02-12, Gunner Asch wrote:
On Mon, 4 Feb 2019 16:59:16 -0600, Terry Coombs
wrote:

* I finally figured out that the reason the drill chuck that came with
my bench top milling machine was so wobbly is the mandrel . The JT taper
is all weird , too loose in the bottom of the hole

[ ... ]

Frankly..unless you like farting around..order a new one. Saves you
time and likely..money.

One thing to consider -- before your (now snipped) attempt to
re-turn the taper -- you should have checked what the taper *really*
was. Note that there are both the more common Jacobs tapers (JT?), and
some for German tapers (B?? series), which are not necessarily
interchangeable with Jacobs tapers. There may even be other tapers for
chucks.

Just to be sure -- get the chuck and the arbor at the same time,
so you are sure that both are Jabobs tapers.

Enjoy,
DoN.

Well said! Here is a decent listing of all the various common taper
systems and their measurements

https://en.wikipedia.org/wiki/Machine_taper

One can..can with some success..fill the hole with melted candle wax
and pulling/pushing it out..measure the existing hole. It wont be
perfect..but it will come close in most cases..to narrow down the
taper family and size.

https://en.wikipedia.org/wiki/Machine_taper


Gunner
__

"Poor widdle Wudy...mentally ill, lies constantly, doesnt know who he is, or even what gender "he" is.

No more pathetic creature has ever walked the earth. But...he is locked into a mental hospital for the safety of the public.

Which is a very good thing."

Asun rauhassa, valmistaudun sotaan.


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