1/4 of the way to a mill

[ACHiPo]

Dave,
congratulations!

 

[ErichKeane]

So the big downside to an MT taper is that the drawbar thread isn't standardized, and much of the chinese/ebay stuff makes poor documentation out of which it is. For MT4, I discovered 3 different threads, 1 of which i could buy tangs for, 2 of which I had drill chucks/centers for

In your case, you may wish to pick up a couple rods of 4140 and just make yourself 1 drawbar of each thread, otherwise you'll find yourself needing to spend 2x to make sure you get holders/etc of the right pitch.

 

[DavidR8]

Indeed @ErichKeane, I was doing some pre-shopping research last night and discovered tapers with M12, 3/8-16 and 1/2-16 threads.
I like your idea of having some 4140 rods on hand. Forewarned is forearmed!


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[middle.road]

Something like this will get you started. If you go for one of these make sure the chuck body has flats on it for a wrench.

Need to determine the thread on the current Drawbar.

ER32 Morse Taper 3 Collet Chuck Tool Holder Set 13 PCS Set

www.shars.com

Banggood, has a 1/2-13 thread. USD$75 cheaper. more collets. Of course with the virus outbreak. . . .

18pcs 3-20mm Collects Set MTB3 ER32 Collet Chuck Set 1/2 Inch Thread with Chuck And Spanner

Only US$151.21, buy best 18pcs 3-20mm Collects Set 3MT ER32 Collet Chuck Set With MT3 1/2 Inch Shank Chuck And Spanner For Milling Machine sale online store at wholesale price.

usa.banggood.com

Then later on you can get a couple of these later, and have the collets to use with them.

 

[DavidR8]

Wait a second @middle.road, were you looking at my browsing history???
Those were the two sets I was looking at.

 

[Aaron_W]

Little Machine Shop has a decent selection of MT3 tooling. I've bought from them several times and no complaints.

It looks like most of theirs are 3/8-16 and they do specify the drawbar used where appropriate. Some items like the dead center don't use a drawbar.

Little Machine Shop MT3 search

 

[RYAN S]

I had two round column mills before I got my bridgeport, I never had any complaints about either one! You will be very happy with what you have!
Ryan

 

[mattthemuppet2]

nice, congrats!

 

[DavidR8]

Little Machine Shop has a decent selection of MT3 tooling. I've bought from them several times and no complaints.

It looks like most of theirs are 3/8-16 and they do specify the drawbar used where appropriate. Some items like the dead center don't use a drawbar.

Little Machine Shop MT3 search

I ended up buying that collet chuck set.
I wasn’t keen on having to make a metric drawbar just to get started.


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[Janderso]

For $1300 I would keeping looking. He who rushes pays top dollar. This isn't something that you had to have yesterday.

Or a piece of junk