What size end mill can a Bridgeport Interact safely handle?

[ichudov]

I have end mills that are on the larger size (such as 1" diameter). I would like to know what is the largest practical size that an Interact can safely handle without overstraining its bearings or motor.

I would hate to break the machine by giving it too big of a job that it cannot handle.

I have coolant working great.

Thanks

[awemawson]

There's Interacts and Interacts - several different spindle motors with different speed ranges and horsepower, so you do rather need to be more specific.

[ichudov]

Sorry.

It is: Series II Interact 2.

Bridgeport Series II Interact 2 CNC Mill

2 HP motor, 3 HP for 30 minutes intermittent.

i

[christinandavid]

Like so many things in life...it's not the size of your tool - it's what you do with it...

The Interact 4 I used to run (don't know HP but it went from 40 - 4000rpm) could easily face steel with a 50mm 2-tip cutter or 80mm Face Mill 3-4mm deep, and I'm sure we used to use endmills/rippers up to 1" in Autolock Chucks.

DP