Ryobi drill press question

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I have a bench top Ryobi drill press which works great except for the small amount of runout in the chuck. This causes a slight oversize hole when using hole saws on mild steel.Can the chuck be replaced with a better quality one? If so, what is recommended?Lee TiltonSCCA F500 Pilot
Reply:It could be the chuck runout, or it could be the bearings causing the runout.Or it could be 'wobbly' hole saws.  Hole saws are generally not precision items.Or all three.Yes, you can -usually- replace the chuck in a drill press.  Find out what the attachment/taper type is, and replace the chuck as desired.If you want more precision than the drill press, you would probably have to go to a milling machine.Precision costs.  There is no real way around that.  The best laid schemes ... Gang oft agley ...
Reply:I have not found many hole saws that run true. The applications usually don't demand anything but rough in anyway.City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:Thanks for the replies. I'm not using them for precision work, but I thought they should be a little more accurate. A 1" hole saw ends up making a 1 1/8" hole. Regular bits seem fine though.Lee TiltonSCCA F500 Pilot
Reply:Originally Posted by F500Thanks for the replies. I'm not using them for precision work, but I thought they should be a little more accurate. A 1" hole saw ends up making a 1 1/8" hole. Regular bits seem fine though.
Reply:Dave's right about the increased performance by switching over to annular cutters.The adapter to fit a Morse Taper spindle will absolutely blow ya away.  They go for around $80-$100"Any day above ground is a good day"http://www.farmersamm.com/
Reply:Originally Posted by farmersammDave's right about the increased performance by switching over to annular cutters.The adapter to fit a Morse Taper spindle will absolutely blow ya away.  They go for around $80-$100
Reply:Originally Posted by dave powelsonThey also have a straight shank adaptor to fit in drill chucks, that's what I use.
Reply:All my hole saws have a hexagonal shank welded on.  When running in a hand-held drill you put a 1/4" twist bit down the center of the shank and tighten a set screw - visible in the photo below.  I don't use the 1/4" pilot on the drill press, it isn't needed for centering on a drill press.   Just make certain the work is clamped to the table in at least two places.The two pictured below are quite large, a 2-3/4 and a 3-5/8 left over from house remodeling projects done long ago.  Neither of these have been on the drill press. I can't get to the smaller ones right now, the truck is in the garage and crowds the drill cabinet so I just grabbed these two from the cellar for the photo. I don't know that I want to use either of these big suckers for metal work, my Delta drill press hates hole saws in metal.  They are not really true in roundness and the press growls and chatters at me.  I go slow, flood the work with cutting oil, and clear the chips frequently.  It gets the job done.    Yes, the chatter makes the holes a bit larger than the stated size, but not by an eighth, maybe a sixteenth.  The runout is all in the hole saw, I have checked the chuck runout with a dial indicater and measured less than .002.  Your Ryobi is probably having thre same problem running a hole saw.-Mondo Attached ImagesMember, AWSLincoln ProMIG 140Lincoln AC TombstoneCraftsman Lathe 12 x 24 c1935Atlas MFC Horizontal MillCraftsman Commercial Lathe 12 x 36 c1970- - - I'll just keep on keepin' on.
Reply:Farmersamm--Yes, the Hougen straight shank adaptor chucks up like a regular drill. It's got three flats on it for max gripping.The most efficient way of hole sawing of large holes in steel plate (when using hougen cutters is not an option) I've found is shown below.This example  is cutting 1.75 to 2.25 dia. holes in 2 stacked and tacked, 3/16 thick steel flats. Average time to cut thru the 3/8" total plate stack was about 3.5 minutes.Using chip relief holes helps a bunch.A inner hole circle was drawn on each center punch, 5/16” smaller in diameter than the outside cut diameter of the hole saws, to locate the chip relief holes. Depending on the size of the hole, either 3 or 4  punch marks were located on these inner diameters.The chip relief holes were thru-drilled with a .250 dia. drill. Doing this chip relief hole business, really speeds up the hole saw drilling, especially in a plate stack of .375 thickness. It works equally well in plywood, drywall, etc.Hole saw beginning the cut.http://weldingweb.com/attachment.php...1&d=1231312330 Each slug has to be removed, prior to cutting the plate hole beneath. Used Lenox, vari-tooth, bi-metal hole saws. These have some chip clearance both on the id and od of the saw, plus avariable tooth design. Best hole saws I’ve ever used.http://weldingweb.com/attachment.php...1&d=1231312407 Attached ImagesBlackbird