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Elninio
08-31-2010, 08:43 PM
http://www.diracdelta.co.uk/science/source/m/o/morse%20taper/source.html
What does 'half included angle' mean? An example is " 1deg 28' " Why is it measured in degrees-foot instead of just degrees? I'd like to find out the angle of a morse taper #3.

jep24601
08-31-2010, 09:00 PM
"Half included angle" means the angle of ONE SIDE of the taper.

Angles are usually measured in degrees minutes and seconds as in this case. There are 60 seconds on a minute and 60 minutes in a degree.

Angles can be measured in other ways - in decimal degrees, in grads (400 to a circle) in Millieme (640 to a circle) and others.

The taper of one side of a #3 MT is 1 degree 26 minutes 15 seconds (1 deg 26' 15"). This is the angle you would set your compound to if machining the taper with the compound.

Al Messer
08-31-2010, 09:06 PM
Morse #3 Taper -----.60235 inches per foot.

08-31-2010, 09:56 PM
Yup. Mr Morse made the Morse taper gages and they are still used as reference masters. They had slightly different tapers then and they till do now.

The accuracy they were made to was pretty good for 1843 or whenever but these days we usually specify fancier stuff. That said the very fact the Morse taper series endures is a prime example of de-facto industrial Darwinism ie: firstest with the mostest.

oldtiffie
08-31-2010, 10:11 PM
Try these - Morse Tapers (MT) is among them:

http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tapers/Machine-taper1.jpg

http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tapers/Machine-taper2.jpg

http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tapers/Machine-taper3.jpg

http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tapers/Machine-taper4.jpg

and:
http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tapers/Machine-taper5.jpg

Astronowanabe
08-31-2010, 10:52 PM
deleted double double post

Astronowanabe
08-31-2010, 10:52 PM
Hi Elninio

pretty sure that is just measuring angles in degrees, minutes (') and seconds (")

so that 1deg 28' is just shy of a degree and a half

1 + 28/60 ~` 1.46666 degrees

http://www.diracdelta.co.uk/science/source/m/o/morse%20taper/source.html
What does 'half included angle' mean? An example is " 1deg 28' " Why is it measured in degrees-foot instead of just degrees? I'd like to find out the angle of a morse taper #3.

Astronowanabe
08-31-2010, 10:54 PM
deleted double post

Elninio
09-01-2010, 09:47 AM
thanks everyone