Long taper centers

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M

MPVic

Member
Joined
Dec 23, 2011
Messages
654
Location
Hamilton, ON, Canada
I have seen here some custom made dead and live centers that have a long taper like 45 deg instead of 60 deg. My goal is to reduce the CA build up from the edge of the blank to the drive during finishing.
Thanks in advance.
 
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The original on IAP is here:
www.penturners.org

Imported Photo from leehljp

Imported Photo from leehljp. Please edit title and description.
www.penturners.org

IF you are using standard bushings, most ANY angle works fine. If you have custom bushings for 60° centers, then of course 60° centers are required. The reason for the long nose on the photo above is that I had nothing to go on and I was living overseas. I did not have a dead center and didn't want to wait for one to arrive from the USA, so I made the first thing that came to mind - out of aluminum stock. At that time, there were NO 60° bushings for live and dead drive centers. So most any angle was acceptable for standard bushings. That was back in 2007 or 2008.

Shortly after that photo was presented on IAP, several IAP members here (USA) started using 60° live centers and drive centers, then John Goodin began making 60° bushings, the first person that I know to do so.
 
Last edited:
Like Ken, I make all sorts of custom ends and jam chucks for turning from HDPE plastic rods. Usually, I start by drilling a 1/4-inch hole in the center of the rod so that I can press them on to the live and dead centers on a set of "Turn Between Centers Mandrel System" from Penn State Industries. That way I can concentrate on the custom shape I am turning and I don't need to worry about the Morse Taper part.

Dave

PS Sometimes I drill the hole with a #73 bit (0.240") or a 6mm (0.236") instead of 1/4" inch so that the fit between the custom end and the mandrel is more of a tight press fit, especially for the dead center - so it is less likely to spin on the mandrel.
 
leehljp said:
The original on IAP is here:
www.penturners.org

Imported Photo from leehljp

Imported Photo from leehljp. Please edit title and description.
www.penturners.org

IF you are using standard bushings, most ANY angle works fine. If you have custom bushings for 60° centers, then of course 60° centers are required. The reason for the long nose on the photo above is that I had nothing to go on and I was living overseas. I did not have a dead center and didn't want to wait for one to arrive from the USA, so I made the first thing that came to mind - out of aluminum stock. At that time, there were NO 60° bushings for live and dead drive centers. So most any angle was acceptable for standard bushings. That was back in 2007 or 2008.

Shortly after that photo was presented on IAP, several IAP members here (USA) started using 60° live centers and drive centers, then John Goodin began making 60° bushings, the first person that I know to do so.
Click to expand...
I like the design. Very easy to use in a collet chuck.
 
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