[modeleng] Re: Tapers
- From: "Shep" <shep.28@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sat, 10 Jan 2009 16:48:22 -0000
Thanks Rich
I have found tables giving specific equivalents, online (ie x inches per
foot = y degrees, minutes, seconds) but thus far not the formula, (which
must include using sines).
I have also found similar confusions and take everything with a pinch of
salt!
The reason I require this information, is that I have an inexpensive digital
bevel gauge, which gives degrees, and decimals thereof, with nice BIG
figures - a super tool for enabling an old chap to accurately set a
top-slide, and perhaps a taper-turning attachment..
Cheers! Hubert
----- Original Message -----
From: "R.L. Roebuck" <rlr20@xxxxxxxxxxxxxxxx>
To: "Modeleng" <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, January 10, 2009 3:59 PM
Subject: [modeleng] Re: Tapers
> Hi there Hubert,
>
> I don't know the formula off-hand - but I would say be careful if you look
> online for conversion factors...
>
> I recently had a confusion between an engineering designer and a company
> making bits for us at work, where one specified:-
>
> * Inches of taper of the diameter per foot
>
> * Inches of taper of the radius per foot
>
> ...with one giving you twice the taper of the other!
>
> Needless to say the tapered fittings and the holes didn't fit and it took
> six weeks for the parts to be remachined (only to find the same two had
> mixed up metric fine and course threads for the large diameter bolts
> holding the tapered fittings in place!).
>
> Such is life!
>
> Yours,
>
>
> Rich.
>
> On Sat, 10 Jan 2009, Shep wrote:
>
>> Hello everyone What is the formula needed to convert to degrees, the
>> taper given in inches per foot?
>>
>> Thanks, all of you mathematical gurus!
>>
>> Cheers! Hubert
>>
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