New member, owner of SB vertical mill


Nick Andrews
 

Not sure if there's a separate group for mills or not, didn't see one.  I have a MIL 3212 mill bought at a university auction that is missing the correct motor pulley.   They installed a single sheave,  possibly to run off a vfd.  I'm looking to replace it and got info on another group that is a little bigger than a 3-4-5-6 pulley.   1" motor shaft on mine. 

The idler shaft bearings are a little noisy but it runs fine on my simple homebuilt rotary converter. Need to get some Velocite for the quill instead of the 3in1 I've been using. 

I got some generic drill chucks with the nmtb30 taper,  had to mill notches for locking screws.   This was the first job I used it for,  actually.   Tilted the head way over about 48 degrees to match the few tool holders that came with it and laid the new holder flat in Kurt vise ($60 at estate sale! ).  Worked great.  Where do you get to holders? 


Jim_B
 

Sorry about being tardy on your approval. I must have been asleep at the switch. 
thats a nice Mil.l. 
SB tended to use proprietary pulleys. You may need to make your own.  I rebuilt a SB Drill press some years ago and converted it to a multi speed unit with an extra step pulley in the middle. 
This was a SB option. 
I made my center pulley. 


It took a few days but worked out in the end. 
SB tended to use standard bearings. The noisy ones can be replaced. I would first try a very light lubricant such as Kroil and see if it quiets. Often the old grease has solidified and a BIT of light oil will soften it up. 


On May 30, 2021, at 2:32 PM, Nick Andrews <nickjandrews@...> wrote:

Not sure if there's a separate group for mills or not, didn't see one.  I have a MIL 3212 mill bought at a university auction that is missing the correct motor pulley.   They installed a single sheave,  possibly to run off a vfd.  I'm looking to replace it and got info on another group that is a little bigger than a 3-4-5-6 pulley.   1" motor shaft on mine. 

The idler shaft bearings are a little noisy but it runs fine on my simple homebuilt rotary converter. Need to get some Velocite for the quill instead of the 3in1 I've been using. 

I got some generic drill chucks with the nmtb30 taper,  had to mill notches for locking screws.   This was the first job I used it for,  actually.   Tilted the head way over about 48 degrees to match the few tool holders that came with it and laid the new holder flat in Kurt vise ($60 at estate sale! ).  Worked great.  Where do you get to holders? 
<20210530_131212.jpg><20210530_131113.jpg><20210530_130909.jpg><IMG_20210515_234229_595.jpg><20210515_155142.jpg>

Jim B.





--
Jim B


sblatheman
 

I think I have the motor pulley you need.
Send me an email.
Latheman2@...
Ted

On May 31, 2021, at 1:21 PM, Nick Andrews <nickjandrews@...> wrote:


Not sure if there's a separate group for mills or not, didn't see one.  I have a MIL 3212 mill bought at a university auction that is missing the correct motor pulley.   They installed a single sheave,  possibly to run off a vfd.  I'm looking to replace it and got info on another group that is a little bigger than a 3-4-5-6 pulley.   1" motor shaft on mine. 

The idler shaft bearings are a little noisy but it runs fine on my simple homebuilt rotary converter. Need to get some Velocite for the quill instead of the 3in1 I've been using. 

I got some generic drill chucks with the nmtb30 taper,  had to mill notches for locking screws.   This was the first job I used it for,  actually.   Tilted the head way over about 48 degrees to match the few tool holders that came with it and laid the new holder flat in Kurt vise ($60 at estate sale! ).  Worked great.  Where do you get to holders? 
<20210530_131212.jpg>
<20210530_131113.jpg>
<20210530_130909.jpg>
<IMG_20210515_234229_595.jpg>
<20210515_155142.jpg>


Nick Andrews
 

Nice!  Those bearings are supposed to be sealed.  I found a manual with an actual part number and can buy replacements.   Thought about doing that and possibly removing the inward-facing seals and adding a zerk to grease the assembly. 


On Mon, May 31, 2021, 12:30 PM Jim_B <jim@...> wrote:
Sorry about being tardy on your approval. I must have been asleep at the switch. 
thats a nice Mil.l. 
SB tended to use proprietary pulleys. You may need to make your own.  I rebuilt a SB Drill press some years ago and converted it to a multi speed unit with an extra step pulley in the middle. 
This was a SB option. 
I made my center pulley. 


It took a few days but worked out in the end. 
SB tended to use standard bearings. The noisy ones can be replaced. I would first try a very light lubricant such as Kroil and see if it quiets. Often the old grease has solidified and a BIT of light oil will soften it up. 


On May 30, 2021, at 2:32 PM, Nick Andrews <nickjandrews@...> wrote:

Not sure if there's a separate group for mills or not, didn't see one.  I have a MIL 3212 mill bought at a university auction that is missing the correct motor pulley.   They installed a single sheave,  possibly to run off a vfd.  I'm looking to replace it and got info on another group that is a little bigger than a 3-4-5-6 pulley.   1" motor shaft on mine. 

The idler shaft bearings are a little noisy but it runs fine on my simple homebuilt rotary converter. Need to get some Velocite for the quill instead of the 3in1 I've been using. 

I got some generic drill chucks with the nmtb30 taper,  had to mill notches for locking screws.   This was the first job I used it for,  actually.   Tilted the head way over about 48 degrees to match the few tool holders that came with it and laid the new holder flat in Kurt vise ($60 at estate sale! ).  Worked great.  Where do you get to holders? 
<20210530_131212.jpg><20210530_131113.jpg><20210530_130909.jpg><IMG_20210515_234229_595.jpg><20210515_155142.jpg>

Jim B.





--
Jim B


Payson
 

Welcome. That's only the 2nd SB mill I've ever seen. Good luck.

Payson.


Nick Andrews
 

Thanks.   It's in pretty good condition,  just a few table dings.  Gearbox for the table power feed and such are gone, just the box where the shaft feeds in and of course the longer right side end with the selection lever.  Picked out up from NMSU auction for about $1250.  Just 3 tool holders,  one being a double taper Z collet,  came with it.  But an 8" Yuasa hor/vertical rotary table too.  So that's cool. 

I then picked up a Kurt Anglok 6" vise at a local estate sale for $60.

Just getting started playing with it. 

On Wed, Jun 2, 2021, 10:30 PM Payson <egreene104@...> wrote:
Welcome. That's only the 2nd SB mill I've ever seen. Good luck.

Payson.


Tony S
 

I have a MIL 4218.  It only came with one tool holder for the Z collets and 2 collets and a broken one.  I need to do what Nick did.  I bought an ER Collet set with tool holder as the Z collets are expensive and hard to find.


Nick Andrews
 

Nice!  I just ordered a NMTB30 ER40 collet holder.   Need to get collets for it soon. 


On Wed, Jun 2, 2021, 11:25 PM Tony S <n9911c@...> wrote:
I have a MIL 4218.  It only came with one tool holder for the Z collets and 2 collets and a broken one.  I need to do what Nick did.  I bought an ER Collet set with tool holder as the Z collets are expensive and hard to find.