[sdiy] 1/4" jack drill bit size?

[harrybissell]

Step drills cut plastic beautifully. If the plastic is thicker than the steps
however.. you get stepped holes (larger diameter on one side than another)

H^) harry

Prototek wrote:

>     Thanks to all that gave tips about the drill. I'm definitely going to
> check out the ones mentioned.
>
>                         Thanks again,
>                         John
>
> on 11/16/02 11:54 PM, patchell at patchell at silcom.com wrote:
>
> > Standard 1/4" jacks use a 3/8" hole...
> >
> > I would recomentd getting what is called a "brad tipped" drill.  Here in the
> > states, you can get these at Orchird (OSH).  They look like a regular drill,
> > but
> > the business end is flat with a little tit in the center.  When drilling thin
> > material, these will make nice round holes.  Another choice would be a step
> > drill...not too sure how that would work in plastic.  Also, drill at slow
> > speed...don't want to melt the plastic.
> >
> > Prototek wrote:
> >
> >> I wanted to mount some 1/4" jacks in a plastic case today but didnt know
> >> what size bit I should buy. My first guess was to get a 1/4" bit but when I
> >> saw it it looked way to small to make a hole for the jack. What size do I
> >> need?
> >>
> >> Thanks,
> >> John
> >
> > --
> > -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a year
> > * -Yogi Yorgensen
> > ------------------------------------------------
> >
> >