Tool Bit for V-Belt Pulleys

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Subject Author Date
Tool Bit for V-Belt Pulleys Brad Smallridge 11-08-2007
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Posted by Brad Smallridge on November 8, 2007, 11:13 pm
A Few Questions:

I recently made a v-belt pulley but
with some difficulty because I had
trouble setting up a 20 degree angle
on the inside surface closest the
lathe head. I suppose I could turn
the pulley around but then it might
not run true.

Anyway, seems like I should be able
buy an off-the-shelf tool bit with
a snubbed 40 degree included angle.
Just plunge a certain depth and I'm
done. Is there such an animal?

Second, I could go for a smaller
belt but can't seem to find anything
smaller than 2L. Where should I look?
And if I can't go smaller, how come?

Third, I once got machine shop info
from some other usenet group alt.
rec.something. What was it?

Brad Smallridge
AiVision



Posted by Si Ballenger on November 9, 2007, 12:39 am
On Thu, 8 Nov 2007 20:13:13 -0800, "Brad Smallridge"



>Third, I once got machine shop info
>from some other usenet group alt.
>rec.something. What was it?

The below group is probably what you are looking for.

rec.crafts.metalworking


Posted by Brad Smallridge on November 9, 2007, 12:43 pm
> rec.crafts.metalworking

OK. Thanks.



Posted by BRW on November 9, 2007, 1:21 pm
wrote:
> A Few Questions:
> I recently made a v-belt pulley but
> with some difficulty because I had
> trouble setting up a 20 degree angle
> on the inside surface closest the
> lathe head. I suppose I could turn
> the pulley around but then it might
> not run true.
> Anyway, seems like I should be able
> buy an off-the-shelf tool bit with
> a snubbed 40 degree included angle.
> Just plunge a certain depth and I'm
> done. Is there such an animal?
> Second, I could go for a smaller
> belt but can't seem to find anything
> smaller than 2L. Where should I look?
> And if I can't go smaller, how come?
> Third, I once got machine shop info
> from some other usenet group alt.
> rec.something. What was it?
> Brad Smallridge
> AiVision

The 7x12 Minilathe group on Yahoo is also very good.

The approach I would take on your problem is to grind my own tooling
to the desired pulley shape. It's a skill every machinist should have
for situations like this.

BRW


Posted by Brad Smallridge on November 12, 2007, 12:27 pm
> The approach I would take on your problem is to grind my own tooling
> to the desired pulley shape. It's a skill every machinist should have
> for situations like this.

I can do a hand job but I don't have the equipment
to do a really nice bit. That's why I asked if
there was an off-the-shelf solution.





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