Question about Drills

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While drilling into PVC pipe, the spindle suddenly developed a severe wobble: i'm getting a good 1/16 inch of play at the base of a 1/2 inch bit. What to do?

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  • williams523 Sep 06, 2009

    The drill press is a Shop Fox Model 1670. When i cleared away some shavings, I noticed a small washer on the floor. Is the thing shedding parts?



    Thanks



    Matt Williams

    williams@cheshire.net

  • williams523 Sep 06, 2009

    I have a three year old Shop Fox Model W1670. I was drilling 1/2 inch holes in PVC pipe and the press developed a severe wobble in the spindle (about a 1/16 of play measured at the bottom of the drill bit). Also, when i cleared away some of the chips, there was a washer on the floor which wasn't there when i started drilling. The washer was about 1/4 inch across.

  • williams523 Sep 06, 2009

    i looked under the chuck (that is, i looked at the chuck from below) and although i saw a small hole where a bolt or screw might go, i saw no bolt or screw.



    the chuck, however, seems to be very tight on the spindle itself.



    when i shake the chuck, it moves right with the spindle. it appears that the play is between the spindle and the tube (don't know the correct nomenclature) in which it slides.



    the suspicious washer turned ot to be from a piece that holds the depth indicator, so i'm pertty sure that this is non- contributory (found the bolt on the floor dome ways off and reassembled the whole deal)



    if there is a bolt that's supposed to go into the base of the spindle and hold the chuck, i guess i'll need another one.



    what size?



    thanks



    Matt Williams



    williams@cheshire.net

  • williams523 Sep 06, 2009

    nope. got the shaft loosened up and the whole thing tilted so i could see what was happening in the inner workings of the chuck. there are no threads in there, so i presume that the chuck is press fit on (#2 Morse taper?).



    i see only one plastic washer, and it seems to cushion the top of the spindle where it meets the frame when the spindle/chuck is returned to the rest position as the spring brings the deal back up when you're done drilling.



    what do you recommend?



    thanks



    Matt Williams



    williams@cheshire.net

  • williams523 Sep 06, 2009

    i have a three year old Shop Fox model 1670. there is a good bit of wobble (runout?0 which appeared when i was drilling into PVC pipe. i have looked inside the chuck, and i don't see a screw whcih would hold it onto the spindle. additionally, the chuck doesn't seem to be comming loose from the spindle, so i'm thinking that the spindle/chuck assembly is somehow loose in the tube.

    what's the next step?

    thanks

    Matt Williams
    williams@cheshire.net

  • williams523 Sep 06, 2009

    oops, sorry... this is a Shop Fox Model 1670.

  • williams523 Sep 07, 2009

    alreadty tried another bit, but the problem continued. (that was about the point that i realized that i needed help) i've managed to swivel the head to a position where i can see up inside the chuck, and i can't see any place where there's a screw or bold which would hold it onto the shaft, so i would presume that it's press fit on a Morse #2 taper or some similar arrangement.



    the washer it shed was from a depth indicator part, so i don't think that's contributory.



    when the spindle is at the top of its travel, there's no play at the bit end, but as soon as you begin to depress the shaft (as though you were drilling inot something) the wobble becomes evident.



    i'm sure that the chuck is not loose on the spindle, and absent driving a wedge in there, i can't see how to get the chuck off the spindle. i don't think that this would help.



    thanks for your assistance- sorry if i'm a bit cranky; my daughter just totalled my car.



    what's next?



    thansk again



    Matt Williams

    williams@cheshire.net

  • williams523 Sep 08, 2009

    I managed to get the pulley off of the top of the spindle, after figuring out (luckily before the threads were stripped) that this is a left hand thread.



    There are thread at the top (where the nut which holds the pulley on) and then there is a taper. I cannot tell if the tapered part is part of the shaft or is attached to it.



    When I look at the top of the spindle, i see a small hole (smooth- no threads in it) wich has been drilled into the center of the spindle and is about 1/8 deep. There are splines in the spindle, whcih appears to be in a shaft, and the splines of the shaft mate with those in the spindle, so that power is transferred from the drive pulley throough the spindle to the shaft which holds the chuck.



    I don't see any circlips any where. Is there an exploded diagram of this press available? The instruction manual, (although I can't find it at present) was stunningly unhelpful: basically it said "put it together, drill holes in stuff, have fun."



    Thanks for your help- i suspect we're on the right track.



    Can you tell me where to get an exploded diagram? (I think this would help with nomenclature)... the worrisome part is I don't see any circlips or bearing parts anywhere.



    Matt Williams

    williams@cheshire.net

  • williams523 Sep 12, 2009

    hammer mode?? this is a floor drill, not a drill driver. Shop Fox Model 1670.

  • williams523 Sep 14, 2009

    i got the user's manual and downloaded it... there's a fairly good 'exploded diagram' in there, and from what i can gather, the chuck is well attached to the spindle, and there is freeplay between the spindle and the quill shaft, so i suspect that there are bearing problems.



    thus, two dumn questions:



    1) how do i get the spindle out of the quill shaft so i can look for the problem?



    2) where can i get new bearings assuming that that's what's wrong?



    thanks for your help... sorry if i'm a bit 'scattered,' but my eldest daughter smashed by car to bits last week and there's rather a lot on the plate.



    Matt Williams



    williams@cheshire.net

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8 Answers

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  • Master
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You mean the drill chuck shaft has the play? if so you have a bearing failure, take the whole thing apart and check the drive bearings for the shaft that the chuck attaches to.

Posted on Sep 14, 2009

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You may have to change the drill head. It may be bent.

Posted on Sep 12, 2009

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  • Master
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Try removing are readjusting the bit.
You might have accidentally put the drill into the 'hammer' mode. See if you can find a lever or sliding switch to change between drill and hammer modes.

Posted on Sep 08, 2009

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Make sure the bit is in the check straight and is completely tight. Remove it and inspect it and make sure it's round, maybe try a different bit to see if it spins straight.

Posted on Sep 07, 2009

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Have you tried another bit?
the bit may have become bent or, if the bit wobbles when you try to drill it may have lost the sharp edge on the bit tip
if the collet is wobbling : remove the (male) threaded shaft or,(female) internal threaded collet and, open the jaws fully you should see a left-hand threaded screw at the bottom of the jaws of the collet tighten it counter-clockwise

Posted on Sep 07, 2009

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  • Master
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Could you please clarify to me the Manufacturer and the model number of the press.

Posted on Sep 06, 2009

  • Dana Newcombe
    Dana Newcombe Sep 07, 2009

    It sounds as though the upper follow bearing has gone or become dislodged from its housing in the spindle housing.If you get on a chair and with a flashlight, look down into the spindle housing you should see a sealed bearing or a series of shims and a washer with a circlip holding it all together.If you raise the head, knock out the taper fit and remove the spindle stop screw. You should have a good idea how to disasasemble the top bearing. Let me know how you make out. Good luck, Dana

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  • Master
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Check inside the chuck to make sure the screw holding the chuck to the spline is tight, if not they use a nylon washer inbetween the chuckand the base to allow for wear check that also.

Posted on Sep 06, 2009

Please specifiy the make and model. Thanks.

Posted on Sep 06, 2009

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