Thread: NT30 ER40 Chuck

I have just acquired a couple of new 1" Sutton end mills with threaded ends, and no chuck to hold them.

I see listed in the catalogs ER40 collets 25/26 mm that could be the way to go.

John.

That will work, also have a look for BT30 chucks as well,they are usually cheaper than the NT30.

You would need to make a longer draw bar though.

You can get bigger ER40 collets then 26mm as well. Up to 28 or 29mm I think.

Also you will find you will only be able to take light cuts with such big endmills. They are large endmills for an ISO30 spindle. But handy when you need a large endmill.

Originally Posted by pipeclay

That will work, also have a look for BT30 chucks as well,they are usually cheaper than the NT30.

You would need to make a longer draw bar though.

The other way is to make adapter that screws onto the bt30 arbor to make up the length, that is how i do it and it works well. I think you can actually buy the adapter.