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Forum topic by Reworx posted 07-06-2014 04:31 AM 1033 views 0 times favorited 5 replies Add to Favorites Watch
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Reworx

4 posts in 887 days


07-06-2014 04:31 AM

Topic tags/keywords: question lathe

My apologies to all the old timers on the board for subjecting you to what I assume will be another thread like so many before. But, I’m in need of someone in the know who can put some meat on my head. ;)

I did some searches, but still haven’t found out exactly the info I’m looking for.

I just bought an old 46-525 Rockwell lathe. Fairly good shape overall and the only problem that I’ve had right off is the cone shaped dead stock piece wanting to stop turning. Not sure what the deal is yet but as long as you have the sleeve (?) seated all the way back it does fine. As soon as you spin the crank and the sleeve starts extending out, tightening up the piece of wood stock, then the dead center piece quits riding on the end of the threaded rod and seats itself farther into the sleeve and doesn’t spin after that. At that point the wood just spins on the cone.

What I want to do is just replace that with a live center. However, after searching high and low, I have yet to find out what the pertinent number, nomenclature, etc., is of that Rockwell style taper so that I can know I’m ordering a part that will actually work. It’s not flat on the end like a Morse Taper and so far I can’t find anything to tell me what it is so I’ll know what I’m ordering!

Would appreciate any info!


5 replies so far

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mtenterprises

933 posts in 2154 days


#1 posted 07-06-2014 12:14 PM

http://www.acetoolrepair.com/parts-rockwell-for-46-525.html – Parts break down on a 46-525 Rockwell lathe. #41 is the part you are talking about? if so it does not rotate within the ram/ tailstock.

Go here on Wikapedia for deminsions of Moris Tapers – (scroll down to the info.)
http://en.wikipedia.org/wiki/Machine_taper#Dimensions Boy I hope these links work.

MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

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Reworx

4 posts in 887 days


#2 posted 07-06-2014 12:53 PM

Yes, MT, #41 is the piece I’m talking about, except my is different from the one they show. Mine does not have an insert point held by a screw. Mine is simply a one piece going from a cone on one end to the other tapered end.

And yes, I looked at the Wiki, but mine doesn’t have that flat end like they show a Morse Taper to have.

hmmm….guess it would be simpler to just take a picture….brb

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Reworx

4 posts in 887 days


#3 posted 07-06-2014 01:10 PM

Ok, in the process of looking at some other info, I took a Jacob’s chuck that I had acquired with some other stuff and tried it to see how it fit. It says it’s a #2 Morse Taper (has the flat end) and it does fit into the tail stock just as deep and seats just as firmly as this cone does.

So, am I to assume that any MT#2 will fit?

Here’s the pic…

 photo deadcenter_zps3eb64fac.jpg

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Nubsnstubs

826 posts in 1191 days


#4 posted 07-06-2014 02:37 PM

Yep, if it fits tight and has to be removed by self ejection by turning the quill handle, then it is a MT2. A MT 1 would not seat, and a MT3 wouldn’t go into the quill.
MT2 live centers are a dime a dozen. ............. Jerry (In Tucson)

-- Jerry (in Tucson)

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Reworx

4 posts in 887 days


#5 posted 07-06-2014 03:10 PM

Ok, thanks for the confirmation! At least now I know what to order! Off to start spending new hobby money! LOL

As an aside, in the meantime I’ve figured out how to cobble together some parts I have. I have a live center that has what seems to be 1/2” SAE (assuming that is still the way threads are described?) female that was on an older model Atlas lathe that I picked up at the same time I got the Rockwell. So while I wait for a new center to get here, I’m going to take that Jacob’s chuck and the correct bolt to thread the Atlas live center onto and use it in my tailstock.

Thanks much for the information!

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