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Mystery taper

Unknown taper ID

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David C	19/08/2012 18:33:50
21 forum posts 15 photos	Wonder if anybody could help me ID this taper. I was led to believe it was a B&S #9 but although the small and large diameters are about right for that, it would appear it's an inch or so too short! Can anyone help please? Sizes are appx as the only tool I could lay my hands on where I am at the moment is a cheap digital vernier and i'm not sure of its accuracy. Thanks David
Stub Mandrel	20/08/2012 21:35:41
4318 forum posts 291 photos 1 articles	The taper is approximately 0.486" per foot using your measurements. Brown and Sharpe is approximately 1/2" per foot, 0.50085(!) for number 9. Standard plug depth is 4 1/4". It isn't Jarno or Morse both of which are about 0.6" per foot. If your taper was extended by 1 1/4" it would be about 0.030" smaller, ten thou smaller than the .9008" of the small end of a Brown & Sharp No.9. So... it might be one cut short, if your measurements are suspect, but I would expect a digital caliper to be within a thou or two. I wouldn't go out and buy a mill to match taht taper though! Neil
David C	21/08/2012 12:08:18
21 forum posts 15 photos	Thanks both for your assistance. Not sure why the post came up twice, must have hit submit twice I assume. I am going to go with "short B&S #9" and work from there. Thanks guys.

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