3mt to Straight shaft adaptor.

[AES]

My apologies lazarus, I have unwittingly passed on what is known in the trade as a "bum steer" (NO horns involved).

Now seeing CHJ's thread I realise I should have gone to the start of the thread and not just jumped in. Apologies for potentially leading you astray. What I said was quite correct if dealing with a MT adaptor into, say, a lathe (for a drilling chuck in the tail stock) or into a Pillar drill. In those cases the MT is always under "in-line" pressure while working, but just as CHJ says, if we're talking about milling and using a collet, depending on the system, that may not always be the case. In which case, you SHOULD DEFINITELY use a draw bar (in principle it's just a long bolt) which ensures the male adaptor is retained within the female whatever happens, otherwise potentially VERY SERIOUS consequences can arise - you do NOT want anything coming loose!

My apologies, I should learn to look at the whole thread before just jumping in before just reading the last post in the thread! (hammer) (that's for me!)

AES

 

[Lazurus]

Thanks again guys, yes the tailstock quill has the slot for using a drift, I guess as the headstock cannot use a drift the machining is for the shorter MT3 taper. yes I will be using the tail stock to support the pigtail, I have no wish to launch the end mill adaptor and pigtail. I may fabricate a drawbar instead I will see what is best option, and yes I do clean my orifice`s after use!!!!!!

 

[novocaine]

I've never worked with a drawbar and taper that has a shoulder that would stop a tanged arbor. all the machines I've use have the through hole the same size as the a the small end of the taper, especially as the tang is meant to be smaller than the tip (only the tip and just for a minute ).

agree with everything above though, it's not like I've worked with every machine ever made (in fact I've still not used the fabaled bridgeport mill I hear so much about, dopey yanks)

 

[Lazurus]

Just to finish this thread off, I got a 3Mt 10mm end mill holder, combined with a 10mm shaft pigtail and this works a treat. thanks for the education.