Router using ER collets?

[giggler]

Hi,

Can anyone provide some feedback on the use of one of the many standard collet adapters for routers. I've got a porter cable speedmatic with 1/4" and 1/2" collets but online lots of tooling just doesn't fit. So I was thinking of using something like an ER20 or ER25 adapter.

Perhaps for ER20:
Buy Axminster Router Collet Extension (1/2' Shank) from Axminster, fast delivery for the UK

and ebay E25?
C1/2-100 ER25 Straight Shank CNC Milling Holder -US | eBay UK

Any advice?

I notice some of the ER collets on the web quote runout larger than the adapters. Are there any pitfalls I should watch out for?

Thanks

dc

[ger21]

An adapter amplifies any runout in the standard collets, due to the extra length. If you need 1/8" collets, you can get them from Precision solid carbide tools for woodworking and metal forming.

Porter Cable makes a 3/8", and you can also find 6, 8, 10, and 12mm collets.
Leigh Dovetail Jigs

[dertsap]

I've put an er16 holder with a 1/2"(chopped short) shank on my router and it runs great and runs true with it , but i think that anything bigger could be a problem as Ger had mentioned .
most of those holders aren't balanced and aren't meant to run at such high rpm's and will destroy the bearings in your router
an er 16 will give you a good range and you'll easily be able to run from 1/8 to 3/8 shank , as long as the one you get is decently balanced which could be a craps shot if your buying chinese . So before you buy it may be a good thing to contact the seller and ask what the max rpm rating is for the holder

[louieatienza]

Like Ger said, I'd check out the PreciseBits site first. You can get the ER nut and collets for your router, and they work well!

[louieatienza]

Amana also sells bushings for different size shanks to fit 1/4" and 1/2" bits; check out toolstoday.com...