Drill press problem

Discussion in 'Off Topic' started by dougsr.874, Aug 9, 2014.

  1. dougsr.874

    dougsr.874 Active Member

    A few months ago I purchased a table top drill press off of ebay....It has an American brand name but is made in China of course...The chuck came packed in a seperate bag with instructions to simply slip it onto the drill spindle and then press down on a block of wood. There is NO set screw to hold the chuck in place and under a HEAVY load the chuck will just fall off of the spindle....Anybody got any ideas how to hold it on the spindle besides super glue????

  2. professor

    professor Active Member

    It is a wedge fit.
    The tapers are just a tad different.
    They lock like crazy.
    To install retract the little jaws so you can whack the chuck upward without hitting those jaws)
    with a hammer and a block of hardwood under the chuck (or some softer metal than the hammer).
    Bigger drill presses have a removal slot for a triangular drift to drive the chuck out. If you spin the handle to run the spindle down and you see a slot become visible- the chuck is readily removable.
  3. darwin

    darwin Well-Known Member

    Using a ballpeen hammer to dimple the chuck shaft in a couple of places might work too. When you create a dimple it adds a 1000th or so to the thickness in that spot. Try 3 of them = spaced around the circumference of the shaft near the middle.
  4. Fabian

    Fabian Well-Known Member

    It's a taper fit. You need to find a way of swinging the drill press head away from the base and to then give the chuck a decent smack with a piece of solid hardwood. This will lock the internal and external tapers together.

    To remove the chuck, do the same thing, but from the top of the drill press; to unlock the taper press fit.
  5. darwin

    darwin Well-Known Member

    Is this the kind where there's a slot above the chuck that you use a wedge shaped bar to release the chuck by tapping the bar into the slot?
  6. Fabian

    Fabian Well-Known Member

    That's the one.
  7. HeadSmess

    HeadSmess Well-Known Member

    chucks standardly have two tapers. a male morse taper on the spindle, and a jurno taper on the chuck end.

    the jurno is the permanent one. once its on properly, its on! its often left apart when buying new machine tools, i have no idea why... (probably so you can use a different arbor?)

    the morse taper is the long skinny one, usually has the small end relieved and machined flat, to lock it in the slot, and to remove it from the spindle. the tang.

    drill presses always lock the tang in the slot. you have to line that up ;)

    mills and lathes dont, and the freakin things spin and it gets messy...

    some chucks only have the morse taper. theyre usually the small, pathetic ones :D

    ensure the tapers are spotlessly clean. very slight smear of light oil only, excess oil prevents them from locking on. may need to rub a stone carefully down the tapers, clean out the bores with rag and solvent, etc. any damage or grit and it will never lock!

    as mentioned above and in the instructions...they need to be pressed on. press or wack with a soft face hammer, both work.

    a 60t hydraulic press is overkill :jester:

    sometimes when you try and get them back out, you find it hard to believe a simple taper can grip so much... :p
  8. V 35

    V 35 Member

    Put a small bottle jack, or block of wood on drill press table . Blast taper inside drill press female taper, wipe clean with q tip . This removes shipping lube, if used .
    Insert tapers, crank press down gently to seat taper . Should move ' a hair ' Test by toggling power, before reaching lowest set to speed .