View Single Post
  #5   Report Post  
Posted to rec.crafts.metalworking
Trevor Jones
 
Posts: n/a
Default JT #2-1/2 means exactly that!

Norm Dresner wrote:

"Trevor Jones" wrote in message
...
| Did you remove the arbor from the drill press? If it IS an MT2 arbor,
| as the tag said, then ...they are not too expensive to consider just
| buying a chuck and arbor that match. The arbor would run $20 and the
| chuck the better part of $200 for new top of the line stuff at retail
| (estimating).
|
| Cheers
| Trevor Jones

Given that the manufacturer when they designed the tool in the late 60's (I
bought it around 1973) used a now totally non-standard JT#2-1/2 taper, what
chance do you think there would be that the spindle/arbor would be
replaceable with a modern variety?

{NOTE: The AMT "Instruction Manual" parts diagram calls it a "spindle"
which is where I'm getting my terminology from}

Norm

FWIW I am going to call the rotating part of the drill press the
spindle. The adaptor between the spindle and the chuck is the arbor,
just so you are clear on what I am saying.

Have you removed the chuck arbor from the spindle of the drill press?
That is the area that you will find a Morse taper, probably the MT2 that
you mentioned in another post, as referred to in the instructions
manual.

http://www.kbctools.com/usa/Navigati...fm?PDFPage=381 shows that
there are no less than 6 different Jacobs Taper arbors available from
Jacobs themseves in morse taper 2 size. There are several choices for
threaded chuchs as well.

There is a chance that the makers built it with a solid shaft with just
a male end on it. That was done on some very inexpensive machines, and
is not a positive thing. If you really felt it worth the time and money,
the DP could be disassembled, and the spindle reground to an available
size, like JT2.

Most common method for removing a morse taper arbor from a DP is to
extend the drill spindle as far down as it will go and there is usually
a slot in the side of it. By turning the spindle you should find a
position where you can see the removal tang of the morse arbor. A wedge
is driven in through the gap to pop the morse arbor out of the spindle.
These can be bought, but most just make them as they wear them out. They
are about 8 degrees taper, rounded on one edge to mate with the edge of
the removal slot, and flat along the other.

http://www.beautifuliron.com/mttaper.htm has what you need to know.

Cheers
Trevor Jones