----- Original Message -----
From: "Rich Fox" <v4gr@rcn.com>
To: "3 liter" <saltfever@comcast.net>; "land-speed submit"
<land-speed@autox.team.net>
Sent: Saturday, June 03, 2006 6:02 AM
Subject: Re: Taper question ( lathe stuff.. could be LSR ) (No. 2)
> I'm not to sure about this. Your putting a center in the tailstock end of
> the bar that is offset, but the tailstock is still centered, and you
> expect a tapered bar will result? If you remove enough to clean up the
> piece, won't you end up with a bar that is straight and has a new center?
> RF
> ----- Original Message -----
> From: "3 liter" <saltfever@comcast.net>
> To: "land-speed submit" <land-speed@autox.team.net>
> Sent: Saturday, June 03, 2006 2:06 AM
> Subject: Taper question ( lathe stuff.. could be LSR ) (No. 2)
>
>
>> You can establish the OFFSET-center a number of ways depending on the
>> precision you want for your taper. (1) you can simply eye-ball it and
>> drill
>> it out in the drill press. (2) You can mount in a 3 or 4 jaw chuck and
>> center-drill an exact center for your datum. Then remove and measure with
>> a
>> ruler a distance from the datum to the offset-center location. Center
>> punch
>> it and then center-drill it a drill press. (3) The most accurate way (but
>> very quick) is to use your cross-slide to establish the amount of offset.
>> Your cross-slide will be graduated in 0.001" (or mm). With the stock
>> chucked
>> up take a slight skim cut on the O.D. of the bar stock or turn a slight
>> shoulder to a known diameter. Anything is ok just so you know you
>> cross-slide dial reading true. Don't touch the cross-slide but move the
>> cutting tool (i.e. carriage) slightly away from the face of the bar
>> stock.
>> Now move your cross-slide IN the exact amount you want your 1/2 offset.
>> Turn on the lathe and move the tool to just kiss the face. It will leave
>> a
>> fine scribe mark (Circle) on the face. You can put a center-hole
>> anywhere
>> on this circle and your offset will be accurate to within .002"-.010".
>> It
>> might seem tedious but you can do this faster that it took me to write
>> this.
>> As mentioned, this method will not be as accurate as the other two but it
>> is
>> fast, and easy. For things like a gear shift or other parts where you
>> want
>> a tapered look, but don't necessarily care about the precision, the
>> OFFSET-CENTER method can't be beat. Good luck and have fun with your new
>> toy.
>>
>> -Elon
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