[pikolo]

So if you build a cnc with a plunge router that accepts 1/4 bits with what adapter would you put dremel bits on it ? or better can you use a chuck?

[ger21]

What kind of router?
You may be able to get 1/8" collets for it.
Do NOT use any type of drill chcuk on a router.

[louieatienza]

Depends on the router. The easiest thing to do is buy a 1/4"-18" bushing from Amana Tool.

[kjk2002]

Collets are the way to go. Check out Precision solid carbide tools for woodworking and metal forming. for a collet based solution for your router. I would avoid sleeves/adapters particularly for bits that exert an upward or downward force in use (spiral cutters for example). Like Gerry said in the previous post - never use a drill chuck.

[louieatienza]

Probably WON'T get a collet for his router from PreciseBits; In fact Ron Reed is discontinuing some models due to fluctuating tapers in some spindles... I do have PreciseBits collet system, but I use Amana bushings just fine, As long as you have the bushing fully engaged in the collet and the bit fully engaged in the bushing you're good to go.

[pikolo]

i have a cheap router bran named budget...so the bushing is the way to go maybe....thanks alot for the replies i will try and come back with the results..!

[awerby]

The smaller the bit, the more it's affected by the eccentricities of the mounting system. A little run-out, say .01", that isn't particularly noticeable in a 3/8" tool becomes a big deal when the whole tool is only 1/16" in diameter and the run-out is almost 20% of the tool - it will break it. If you're using a cheap router with a lot of run-out to start with, and then use bushings to make your tool fat enough to fit, the errors stack up against you. You might get away with it, but definitely wear your safety glasses...