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1:8 tapered shaft. What does that mean?

metootoo (Mechanical) (OP)
15 Oct 07 16:11
I have a motor with which the manufacture says that it has a 1:8 tapered shaft.  I have to design a hub that goes on it.  I know the diameter of the shaft before the taper, and I know the taper length.  What I do not know is the angle of the taper or the diameter at the end of the taper.  What does 1:8 taper mean?

Thanks
metootoo (Mechanical) (OP)
15 Oct 07 17:46
Nevermind.  I figured it out while looking at some screen shots of some prop software.

1:8 taper mean the shaft diameter decreases by 1/8th the taper length.

Example:
Shaft diameter = 2.00
Taper length =3.5
Shaft has a 1:8 taper

The diameter at the end of the taper = 2-(3.5/8)= 1.5625
Cheddarcaveman (Mechanical)
6 Nov 07 15:26
Rather like we indicate a hill steepness here in UK.
For every eight in length, you lose 1 in diameter.
A simple example, if your taper is over an 8mm length and your shaft is 10mm at the "thick" end, it will be 9mm at the other.

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