Replies

1. 
   UncleDunc | Jan 19, 2005 11:52am | #1

   I see three problems with modifying the 3/4 x 1 bushings yourself. 1) Locating the bushings under the drill press spindle to the required degree of concentricity. 2) Holding them in place without squeezing them out of round, or interfering with the drill, or making the locating problem more difficult. 3) Getting the correct size hole. A 20mm drill is unlikely to do the job. You'd need a 19.5mm drill and a 20mm reamer instead.

   You can solve all three of these problems with some combination of time and tooling. If you lean toward time, it will take more time than it would take to earn $60 at your day job. If you lean toward tooling, it will cost a lot more than $60. In my humble opinion.

   My advice is buy a 20mm dado set. (Sell the 1" set if you don't have a 1" machine to use it on. Keep it if you do.) If you can't find a 20mm set you like, pay the machine shop to make the bushings.

2. 
   eddiefromAustralia | Jan 19, 2005 12:39pm | #2

   Ken,

   Don't bore them, have a machine shop ream them, if you must.

   It's too risky for mine, but.

   I'd sell them and follow Uncle Dunc's advice.

   Cheers,

   eddie

3. 
   RickL | Jan 19, 2005 02:24pm | #3

   I have a similar type bored dado and my local sharpening shop sold me bushings to accomodate me at a reasonable cost. Off the shelf item. Basically you need a bushing to go from 1" to 20 mm for each blade. I'll check today when I go to work on the cost.

4. 
   WillGeorge | Jan 19, 2005 03:17pm | #4

   $60, plus materials  Go for it..  Sounds VERY reasonable to me.  Alot of places will charge that and more just for set-up time..