Gene Heskett
2016-05-31 01:14:25 UTC
Hi all;
For want of a better project to keep me out of the bars tonight, I went
out and extracted the stripped belt off the toy lathe just now, find it
well labeled as a 130XL037, 3/8" wide, 65 tooth belt. It appears that I
had already replaced the ultra teeny drive pulley that stripped the last
belt easily had already been replaced with a 15 tooth model. So even
with about 7 cogs fully engaged, this motor still had the cojones to
strip the teeth off the belt. So I am thinking out ordering a 140 or
even a 150 (75 cogs) belt and a bigger lower drive pulley which should
get more cogs engaged. That will of course raise the spindle speed and
probably make me run on low backgear more often, but this motor has the
cojones to do that so I am not worried too much.
So my question is, if I buy a 150 cog belt, and the existing lower pulley
has 16 cogs now, and I add 10 more to the belt, making it 75 it sounds
as if I would need to add another 5 to the almost half circle that would
be engaging the belt on each side, so the 16 cog pulley now would turn
into a 26 if I want the center to center distance to remain within say
2mm's of what it is now. That seems to me like if I tension it to about
high C, that ought to be able to survive that 1 hp motor long enough to
at least finish one job, bearing in mind there is a 3/1 stepdown between
the motor, and the shaft turning this lower pulley.
Is my math somewhere near correct? And would I be better off paying the
price of one of the white poly/kevlar belts as opposed to this black one
with a few strabds of kevlar in the backing and teeth that look like a
glass reenforced black rubber? I'll check McMaster-Carr, but I can get
this belt for about $4/copy from the prople that used to be GoodYear.
Comments anybody? Or did my mental math blow it, like its been known to
do several times before?
Cheers, Gene Heskett
For want of a better project to keep me out of the bars tonight, I went
out and extracted the stripped belt off the toy lathe just now, find it
well labeled as a 130XL037, 3/8" wide, 65 tooth belt. It appears that I
had already replaced the ultra teeny drive pulley that stripped the last
belt easily had already been replaced with a 15 tooth model. So even
with about 7 cogs fully engaged, this motor still had the cojones to
strip the teeth off the belt. So I am thinking out ordering a 140 or
even a 150 (75 cogs) belt and a bigger lower drive pulley which should
get more cogs engaged. That will of course raise the spindle speed and
probably make me run on low backgear more often, but this motor has the
cojones to do that so I am not worried too much.
So my question is, if I buy a 150 cog belt, and the existing lower pulley
has 16 cogs now, and I add 10 more to the belt, making it 75 it sounds
as if I would need to add another 5 to the almost half circle that would
be engaging the belt on each side, so the 16 cog pulley now would turn
into a 26 if I want the center to center distance to remain within say
2mm's of what it is now. That seems to me like if I tension it to about
high C, that ought to be able to survive that 1 hp motor long enough to
at least finish one job, bearing in mind there is a 3/1 stepdown between
the motor, and the shaft turning this lower pulley.
Is my math somewhere near correct? And would I be better off paying the
price of one of the white poly/kevlar belts as opposed to this black one
with a few strabds of kevlar in the backing and teeth that look like a
glass reenforced black rubber? I'll check McMaster-Carr, but I can get
this belt for about $4/copy from the prople that used to be GoodYear.
Comments anybody? Or did my mental math blow it, like its been known to
do several times before?
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>