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3/4" 16tpi to a MT#2

N

northwoodsice

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Nov 1, 2005
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Can anyone guide me to a website or company that can adapt a 3/4" 16tpi shaft to a MT#2? I might just get the adapter milled locally but just would like to see what else is out there. Thanks for any help.
 
yes that is what i watn to do.

That is what i want to do. I have found an article that supposedly used a morse taper socket to do this but i have not found any such socket.
 
All of the lathes I'm familiar with that have 3/4 x 16 have a #1 morse taper. A #2 morse taper is too large to put internally in a 3/4 16 spindle. Could you explain to us why you need a #2 morse taper. We may be able to find a good alternative. There have been several lathes on the market that didn't have internal morse tapers at all and you could turn just about anything you wanted with these lathes.
 
i'll try again

I dont need the taper to go into the 3/4" shaft, i would like an adapter that is whatever size and has a morse taper hole on one end and the other end is tapped and ready to accept the 3/4" 16tpi shaft. Is that clear, if not i'll try again.
 
Clear as mud

Clear as mud.
Can you go back to the start.
What shaft size do you have and what are you trying to fit onto it.
You may be trying to go about this the wrong way.
It sort of sound like you are trying to make a female female adaptor with one female end 3/4 x16 and an extention with a female morse taper.
 
I don't know if this will work or not. Shopsmith sells a MT2 adapter to fit their faceplates etc. The have a straight shaft on their machines (though I don't know the size off hand). Might be possible to get one of them and have the end threaded. Just a thought.

Paul
 
ShopSmith's spindle is 5/8". They make a MT2 male to 5/8" male shaft adapter, but not the other way around.

It sounds like the original poster wants an adapter with 3/4"x16 female threads on one end, and an MT2 female on the other end. I'm guessing he's got a 3/4" threaded shaft he wants to be able to put MT2 things on.

I've never seen anything like that. It'd end up being pretty long.

-Joe
 
northwoodsice said:
i would like an adapter that is whatever size and has a morse taper hole on one end and the other end is tapped and ready to accept the 3/4" 16tpi shaft.
Click to expand...
I understand, but I don'r know of anyone that make it as a stock item. The problem is that you end up getting a 6" long nose that is subject to extra runout, and the end is not supported by a bearing and puts increased stress on the headstock bearings.

I will make the assumption that the device (lathe, etc.) you have doesn't have a through hole to accept a morse taper and you want to put a #2 morse taper device in it. Is this the headstock end or the tailstock end?
 
It is for the headstock end. I wondered about the adapter being to long. Also the shaft I have is going to be a 1' shaft dia. I wonder if a machine shop could mill a morsre taper #2 in the end of the shaft, will have to find out. Thanks for the responses.
 
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Two options to consider
1. you can get a #2 to #1 morse taper adapter this is a socket bored with a #2 taper on one end and a #1 taper on the other end. The socket will sit outside the headstock spindel about 4 inches. $6.85 from Wholesale Tools. This is likely to add about the same amount of vibration that you would expect from a screwon sockect.

2. You can get a straight shank drilled with a #2 morse taper. these are 4" long and come in diameters from 1" to 2". These could be held in chuck or a block of wood mounted on a faceplate. $6.50-$8 from Wholesale Tools.

These are on page 46 of thw Wholesale Tools catalog
they have web site http://www.wttool.com/
they have a Store not far from Lakeland and few others around the country.

I would guess that other machine tool companies like MSC or Enco have similar items

Happy Turning,
Al
 
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I went through a similar search for an adapter for a 5/8" threaded spindle without a Morse taper. My solution was to get a Oneway chuck with a 5/8" 11 tpi adapter. I can use the Oneway with a 4-point spur or a screw mount, in addition to the Oneway jaws.

The runout with any other adapter would be likely to be excessive, IMO, but I'm curious to see how you work out your problem.
 
northwoodsice said:
It is for the headstock end. I wondered about the adapter being to long. Also the shaft I have is going to be a 1' shaft dia. I wonder if a machine shop could mill a morsre taper #2 in the end of the shaft, will have to find out. Thanks for the responses.
Click to expand...
What you want to do actually defeats the whole rationale for using a Morse taper. A morse taper machined into a spindle shaft can be made with a precision that will allow inserts to have a runout of a thousandth of an inch or so. The total runout on a threded shaft is many times greater than that. When you stack the type of adapter that you want onto the end of a threaded shaft, the runout will be multiplied even further. What you would wind up with is a Morse taper hanging way out from the end of a shaft and having unacceptable coning and radial misalignment that would make using a drive center with a MT pointless.

Bill
 
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now that makes alot of sense, I will have to go back to the design table on this one.
 
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The part can definitely be made. I agree with the others. You will get a lot of vibration. 3/4" 16 isn't a very big shaft and if you extend it out 5 to 6" you are really going to have problems. There might be another way to do what you are trying to do. Have you looked at the Beal Collet system. This won't let you use #2 morse taper accessories but will let you hold smaller sized items. You can also get drive centers that are threaded to fit over a 3/4" x 16 shaft. I haven't looked on their website but www.bestwoodtools.com makes these drive centers is several sizes I'm just not sure if that's one of them.
 
Another option instead of a whole bunch of adaptors.
Take the lathe shaft and bearings to your local engineering firm and
a/ make a new shaft with a larger spindle to cope with a 2mt taper and a 1"x8 thread.
b/ ask them to bore a 1mt taper in your existing shaft. You cant put a 2mt taper in this shaft as the wall thickness will be too thin..
c/ buy a another lathe with all the better options 2mt taper and a 1 1/4" shaft.
 
frostyford said:
You need to get with Bonnie Klein, she makes that exact adaptor for the MT2 on her threading jig setup. www.bonnieklein.com

Frostyford (Scott)
Click to expand...
No, the Klein adaptor is just the opposite -- it is designed for use with the Klein threading jig when used on lathes that do not have a 3/4-16 spindle, but do have a MT2 socket in the spindle.

Bill
 
Converting a threaded headstock to mt#2

I think I know what Northwoodsice means. I have been working on a similar problem. I am brand new to turning, and am starting out with pens, etc. There are several tools (pen mandrels in particular) which require a mt#2 socket. I have been trying to convert a 3/4" 10tpi threaded shaft to mt#2. I finally found a site which has a threaded converter from 3/4" 10tpi to 1" 8tpi. As it happens, they also sell a pen mandrel which is 1" 8tpi which solves this problem. I would however like to add a mt#2 socket to my machine. There may be better alternatives, I just don't know. Thanks in advance for any help. Jim
 
Hockenbery's option #2 is how I'd go, a morse taper sleeve which can be bored and threaded on the other end for your 3/4" lathe spindle by a machinist. It should work fine for spindle turning, beteen centers, to hold a spur drive. Hopefully, the sleeve is unhardened, but can be heated red hot to take the hardness out if necessary.
 
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