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Posted by Jones on March 3, 2008, 11:53 am
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Hello, all,
I recently purchased a Jet drill press, and I've been having some
trouble getting the chuck to fully seat properly on the tapered spindle.
The Jet instruction manual said to get everything as clean and devoid
of oil or other lubricant as possible, and I used Brake Kleen spray on
the spindle and the tube that it fits into...however, when I use the
press, the chuck still sometimes "slips" on the spindle when I'm trying
to drill through something.
I have knocked out the spindle-chuck assembly multiple times and
re-cleaned and tried to re-seat it, and still the problem persists.
Can anyone offer any suggestions on how to get this seated properly? I
was considering putting the spindle-chuck assembly into the freezer and
heating the tube on the drill press which the spindle slides up into
with a heat gun or propane torch...is that an acceptable method?
Thanks for any clues.
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Posted by RoyJ on March 3, 2008, 12:28 pm
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If a new taper won't stay put, there is usually a burr or high spot
somewhere. Try smearing the tapered end with layout dye or even a Magic
Marker, then doing a loose fit with a bit of a twist. The high spot
should show up quickly. If you get a full ring of dye, you have a
defective taper on one of the parts.
Jones wrote:
> Hello, all,
>
> I recently purchased a Jet drill press, and I've been having some
> trouble getting the chuck to fully seat properly on the tapered spindle.
>
> The Jet instruction manual said to get everything as clean and devoid of
> oil or other lubricant as possible, and I used Brake Kleen spray on the
> spindle and the tube that it fits into...however, when I use the press,
> the chuck still sometimes "slips" on the spindle when I'm trying to
> drill through something.
>
> I have knocked out the spindle-chuck assembly multiple times and
> re-cleaned and tried to re-seat it, and still the problem persists.
>
> Can anyone offer any suggestions on how to get this seated properly? I
> was considering putting the spindle-chuck assembly into the freezer and
> heating the tube on the drill press which the spindle slides up into
> with a heat gun or propane torch...is that an acceptable method?
>
> Thanks for any clues.
>
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Posted by Tim Wescott on March 3, 2008, 12:48 pm
Please log in for more thread options Jones wrote:
> Hello, all,
>
> I recently purchased a Jet drill press, and I've been having some
> trouble getting the chuck to fully seat properly on the tapered spindle.
>
> The Jet instruction manual said to get everything as clean and devoid of
> oil or other lubricant as possible, and I used Brake Kleen spray on the
> spindle and the tube that it fits into...however, when I use the press,
> the chuck still sometimes "slips" on the spindle when I'm trying to
> drill through something.
>
> I have knocked out the spindle-chuck assembly multiple times and
> re-cleaned and tried to re-seat it, and still the problem persists.
>
> Can anyone offer any suggestions on how to get this seated properly? I
> was considering putting the spindle-chuck assembly into the freezer and
> heating the tube on the drill press which the spindle slides up into
> with a heat gun or propane torch...is that an acceptable method?
>
> Thanks for any clues.
>
If it's a decent fit then shrinking it in place may well make it
permanent -- you don't want that.
I've always assembled these with an exceedingly light coating of very
light oil -- basically I clean the parts off with oil on a rag, wipe
them off firmly, and assemble. The oil limits corrosion, but is in such
a thin film that the surface strength is exceeded when you bear down on
the drill and that makes enough friction so that everything works.
The only time I've had trouble is when I've been abusing the joint, by
putting side loads on it, or making it vibrate under light down-force,
or other such foolery. Even there it doesn't slip so much as the morse
adapter falls out of the spindle.
You've probably got a fit problem. I know this is inconceivable with
newly purchased budget Chinese equipment, but none the less yours may be
the rare case where the insanely quality-conscious Chinese labor force
has slipped up -- perhaps they were buying parts from Germany, or something.
Do a fit check, per RoyJ.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
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Posted by T.Alan Kraus on March 3, 2008, 2:35 pm
Please log in for more thread options Tim Wescott wrote:
> You've probably got a fit problem. I know this is inconceivable with
> newly purchased budget Chinese equipment, but none the less yours may be
> the rare case where the insanely quality-conscious Chinese labor force
> has slipped up -- perhaps they were buying parts from Germany, or
> something.
I spilled my coffee through my nose... :)
T.Alan
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Posted by Rob Fraser on March 3, 2008, 4:33 pm
Please log in for more thread options
> Tim Wescott wrote:
>
>> You've probably got a fit problem. I know this is inconceivable with
>> newly purchased budget Chinese equipment, but none the less yours may be
>> the rare case where the insanely quality-conscious Chinese labor force
>> has slipped up -- perhaps they were buying parts from Germany, or
>> something.
>
> I spilled my coffee through my nose... :)
>
>
> T.Alan
I wondered who bought up all the good Jacobs and Bosch chucks!
LOL
Rob
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>
> I recently purchased a Jet drill press, and I've been having some
> trouble getting the chuck to fully seat properly on the tapered spindle.
>
> The Jet instruction manual said to get everything as clean and devoid of
> oil or other lubricant as possible, and I used Brake Kleen spray on the
> spindle and the tube that it fits into...however, when I use the press,
> the chuck still sometimes "slips" on the spindle when I'm trying to
> drill through something.
>
> I have knocked out the spindle-chuck assembly multiple times and
> re-cleaned and tried to re-seat it, and still the problem persists.
>
> Can anyone offer any suggestions on how to get this seated properly? I
> was considering putting the spindle-chuck assembly into the freezer and
> heating the tube on the drill press which the spindle slides up into
> with a heat gun or propane torch...is that an acceptable method?
>
> Thanks for any clues.
>