Drill bit vibration

[Keith Christopher]

looking for ideas to reduce drill bit vibration, When I first enter the material I get massive vibration making the top hole wider of course. No matter how slow I go. I don't typically see it when I use smaller bits, however spinning a 31/64 I get it BAD. Ideas ?



BTW I'm over 1000 posts !

[Hank Walczak]

Have you checked out the obvious - run out and a worn out chuck? You may be getting vibration with the small bits too but it may not be as easy to see. Want to try reseating the chuck?

Hank

[pat warner]

With what type of drill?
Opening holes or new holes?
Brad points in wood usually track well.

Routers and some drilling (http://www.patwarner.com)

[Brian Hale]

Is this in a drill press?

Brian :)

[Bob Johnson2]

The arbor on my DP is worn or maybe a tad bent, it too has the shakes. As I can't get parts for it (1950's vintage Shop smith) I make due. Your's sounds different though as I get it for all size bits and speeds.

[Vaughn McMillan]

Is the bit sharp? I've seen this with plain ol' twist bits that are dull, or have been sharpened with the point off-center.

- Vaughn

[Keith Christopher]

Is this in a drill press?

Brian :)


Brian,

Hehehe good point, yes this is in my DP.


Keith

[tod evans]

keith, try a pilot hole? or crank up the speed for the first 1/4"...02 tod