Morse Taper / Jacobs Taper Identification help

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Forum topic by ChunkyC posted 02-07-2011 12:01 AM 6182 views 0 times favorited 9 replies Add to Favorites Watch
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856 posts in 3252 days

02-07-2011 12:01 AM

I would like to get a new chuck, a smaller one for smaller bits, for my Drill Press. It’s a Morse Taper Chuck but I’m having troubles positively identifying the taper. It’s a metric chuck and it’s stamped 3-16mm B16. B16? I was expecting a JT number. Is this a metric thing that I’m unfamiliar with? I was hoping not to have to buy a new chuck and arbor but I can’t seem to cross the B16 with anything at McMaster Carr.

Any help getting me pushed in the right direction would be appreciated.

-- Chunk's Workshop pictures:

9 replies so far

View Bill Davis's profile

Bill Davis

226 posts in 3922 days

#1 posted 02-07-2011 12:25 AM

I know nothing about taper so no real help. But I Googled “taper 3-16mm B16” and there sure was plenty that seemed to indicate info is readily available. May be a start.

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856 posts in 3252 days

#2 posted 02-07-2011 12:50 AM

Yeah I did a similar search and came up with the Chinese made results too. I still need to cross reference what I have to what I want to have. It may boil down that I need to buy a new arbor too. I was hoping to forgo the added expense, but …

I need to verify that I have a #2 Morse taper arbor. I may sneak over to the machine shop at work tomorrow and ask the pros in there to help identify what I have.

-- Chunk's Workshop pictures:

View Carl Webster's profile

Carl Webster

82 posts in 2796 days

#3 posted 02-07-2011 01:25 AM

Consult the following Website for Morse Taper sizes:

-- Carl in SC

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727 posts in 2841 days

#4 posted 02-07-2011 02:07 AM

Whats the make and model? Do you have a manual? -Jack

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856 posts in 3252 days

#5 posted 02-07-2011 02:54 AM

It’s Chinese Model No. POS. :(

-- Chunk's Workshop pictures:

View wseand's profile


2796 posts in 3040 days

#6 posted 02-07-2011 06:21 AM

I am not familiar with that Model Number. I have the FUBAR model I think that is the one you are looking for.

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856 posts in 3252 days

#7 posted 02-09-2011 01:15 AM

Does anyone know if there is a metric version of the the Morse Taper?

Here’s why I ask. Everything that I have figured out on this little thing is that it looks like the chuck taper is some sort of metric version of a Jacobs Taper, called a ISO … B Taper. But I have sussed out if the the arbor that goes into the press it a standard MT or some metric equivalent. I found the measurements for a MT but they don’t give the tolerance with the measurement. Mine measures somewhere between 0.708 -0.710 depending on who measures it. Is 10 thousandths too much out of tolerance?


-- Chunk's Workshop pictures:

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856 posts in 3252 days

#8 posted 02-09-2011 01:23 AM

I guess to finish my thought…

I was thinking that if I could positively identify that I do in deed have a #2MT then I’ll just buy a new arbor with the JT that I want. See I had originally thought that I would reuse the this arbor but finding a B16 taper chuck has been most difficult.

Now I realize that the max dim of the MT is not that critical. It’s all about the taper, thousandths / inch, and not the max diameter. But if the max diameter is off, this makes me question if the taper is correct. As long as the taper is the same, then I’m golden. I just have to make sure that the DP really is a #2 MT.

-- Chunk's Workshop pictures:

View BobG's profile


172 posts in 2960 days

#9 posted 02-09-2011 02:20 PM

Chunkyc, On a taper fit, you are right it is the amount of “Taper per foot or inch” that needs to be spot on. If not, you can get wobble or, it may even fall out when you least expect it. The amount of taper that the tenon has on a drill or a drill chuck can vary from one to another. It depends on the length of the tenon. “Although”, and there is always one of those, there is a length that manufactures shoot for to maintain uniformity.

-- BobG, Lowell, Arkansas--------My goal in life is to be the kind of person my dog thinks I am! Make more saw dust!!

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