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MORE BRIDGEPORT M HEAD QUESTIONS

Currahee26

Iron
Registered Member
#1
Greetings!

The mill is up and running fine. I have a question about the COLLETS /SPINDLE SIZES. I have a set of collets that are Morse Taper #2 that fit the M head spindle I have. They are limited to 1/2 inch max.

What device am I looking for that will allow me to use the MT #2 spindle main hole size and drawbar, but use BIGGER milling bits? I'm presuming there is an ADAPTER to do just this sort of upgrade, but I don't know what I'm looking for by NAME. I see spindle CHUCK adapters but they don't tell me much as to how they are used. (On eBay) I have a MT keyed Jacobs drill bit chuck but it is limited in size and accuracy. It is NOT drawbar tightened.

Any suggestions or mfg names/styles I am looking for?
Thanks
Dave
 

markba633csi

Active Member
Active Member
#3
You could also get a MT2 to ER collet chuck and just buy the collet sizes you need. May have to make a new drawbar.
ER25 goes to 5/8"
ER32 goes to 3/4" I think
Mark
 

Currahee26

Iron
Registered Member
#4
WOW!< Great information! I had an idea this is what I wanted but could never find an adequate description of these adapters to pull the trigger on.

Thanks gentlemen for your help and information
Dave
 

Silverbullet

Active Member
Active Member
#7
Hi welcome to the site. The er32 will work well and is easier then changing the morse collets . Nice little mill will do lots of work , make a fly cutter to use , every mill needs one . Easy project and can be made in lots of ways.